Browse Topic: Agricultural vehicles and equipment

Items (1,078)
The growing demand for decarbonization and reduction of emissions from internal combustion engines used in the agricultural sector is mainly responsible for the utilization of alternative or low-carbon fuels. In this context, in situ biogas production and Dual-fuel technology bring an important opportunity for farmers to use gas with diesel or biodiesel in the agricultural machinery, reducing production costs and carbon emissions. To this end, this work evaluates efficiency, emissions, and economic performance in an internal combustion engine equipped with a Dual-fuel injection for diesel and methane. The tests were carried out on a four-cylinder turbocharged Agrale tractor, model BX6110, with modifications for run on diesel-NGV blends under operating conditions with engine speed from 1500 to 2150 rpm, fuel injection times of 80 to 200, at full load. The results showed that the diesel flow was constant during the tests, therefore, power increases depending on the NGV injected. Maximum
Rincon, Alvaro Ferney AlgarraAlvarez, Carlos Eduardo CastillaFilho, Aldir Carpes MarquesOliveira Faria, RafaelVolpato, Carlos Eduardo SilvaOliveira Notório Ribeiro, Jéssica
The exponential growth of the agribusiness market in Brazil combined with the high receptivity among farmers of new technological solutions has driven the study and implementation of high technology in the field. This work aimed to apply servo-assisted driving technology to enable autonomous mobility in an off-road sugarcane truck responsible for harvesting sugarcane. The technology consists of a conventional hydraulic steering with a motor, ECU and torque and angle sensors responsible for reading input data converted from GPS signals and previously recorded tracking lines. The motor responsible for replacing 100% of the physical force generated by the driver acts in accordance with the required torque demand, and the sensors combined with the ECU correct the course to meet the follow-up line through external communication ports. The accuracy of the system depends exclusively on the accuracy of the GPS signal, in this case reaching 2,5 cm, which is considered extremely high accuracy
Oliveira Santos Neto, AntídioLara, VanderleiSilva, EvertonDestro, DanielMoura, MárcioBorges, FelipeHaegele, Timo
The cumulative accumulation of greenhouse gases (GHGs) historically has resulted in the current problem of global warming. This is further compounded by developed nations, therefore, to fill this gap enhanced global actions are decided. Considering Country’s development need, available resources, government boost for agriculture, A holistic approach for 4W PVs is taken considering well to wheel emissions, as there are other ways to reduce tank to wheel emissions but may not be very effective for overall country’s GHG reduction. Major emissions in vehicle use are calculated based on Carbon intensity of various fuels & optimum pathway for Indian scenario is prepared & discussed in the paper considering all aspects CO2 reduction, development & motorization need. This paper explains multiple pathways for Passenger Vehicle (PV) Sector to be considered to meet country’s GHG needs
Sarna, NishantJaiswal, HarshRani, AbhaDwivedi, VipinVashisth, AjayBhat, AnoopAggarwal, Tarun
Clean-burning fuels, aftertreatment and other innovations place the heavy-duty combustion engine on a low-carbon emissions trajectory. Agriculture, industrial, mining, construction, freight transport and other major global economy sectors rely on vehicle power to thrive. “Internal combustion engines - those powered by gasoline, diesel, natural gas or propane - really are key to our current economy, and we see [the ICE] as a key part of our energy future,” Allen Schaeffer, executive director of the Engine Technology Forum, a U.S.-based educational organization, said during a September webinar. Hosted by the Engine Technology Forum, the “Taking Internal Combustion Engines to the Next Level” session focused on current and under-development innovations aimed at increasing engine efficiency and lowering emissions
Buchholz, Kami
Conventional robotic grippers struggle with the unique shapes, properties, and delicate nature of different crops. Consequently, there has been an increasing demand for more versatile robots that can adapt to objects with various shapes, sizes, and textures
The electrification of agricultural machinery, such as tractors, presents an opportunity to mitigate environmental impacts associated with traditional diesel-powered equipment. Central to this transition are the battery packs that power electric tractors, the choice of which can significantly influence the tractor's overall environmental footprint. This paper conducts a comparative case study to assess the environmental impacts of different battery pack configurations in a low-profile, full-electric tractor model tailored for orchard and vineyard applications. Parametric analysis is conducted using a one degree-of-freedom 4WD tractor model to assess power needs for traction across varied working conditions, including slope, speed, and terrain characteristics. Also, by integrating life cycle optimization, dynamic modeling, and scenario analysis this study evaluates the environmental performance of various battery pack options, considering factors such as raw material extraction
Mendecka, Barbara MalgorzataTribioli, LauraLombardi, SimoneFederici, LeonardoBella, Gino
Southwest Research Institute has developed off-road autonomous driving tools with a focus on stealth for the military and agility for space and agriculture clients. The vision-based system pairs stereo cameras with novel algorithms, eliminating the need for LiDAR and active sensors
HD Hyundai recently announced several new additions to its portfolio of off-highway machines. The expansion includes the HD100 dozer, the HX355A excavator, and a quartet of new models for its HX-A series of compact excavators. The HD100 is Hyundai's first new crawler dozer model. “The new HD100 dozer will be a great addition to the equipment fleets of earthmoving contractors, forestry, waste handlers and other customers who already enjoy the benefits of using Hyundai wheel loaders and excavators,” said Mike Ross, senior VP, HD Hyundai Construction Equipment North America
Wolfe, Matt
India is a diverse country in terms of road conditions, road maintenance, traffic conditions, traffic density, quality of traffic which implies presence of agricultural tractors, bullock carts, autos, motor bikes, oncoming traffic in same lane, vulnerable road users (VRU) walking in the same lanes as vehicles, VRU’s crossing roads without using zebra crossings etc. as additional traffic quality deterrents in comparison to developed countries. The braking capacity of such vivid road users may not be at par with global standards due to their maintenance, loading beyond specifications, driver behavior which includes the tendency to maintain a close gap between the preceding vehicle etc. which may lead to incidents specifically of rear collisions due to the front vehicle going through an emergency braking event. The following paper provides a comprehensive study of the special considerations or intricacies in implementation of Autonomous Emergency Braking (AEBS) feature into Indian traffic
Kartheek, NedunuriKhare, RashmitaSathyamurthy, SainathanManickam, PraveenkumarKuchipudi, Venkata Sai Pavan
Airplane manufacturers running noise tests on new aircraft now have a much cheaper option than traditional wired microphone arrays. And it’s sensitive enough to help farmers with pest problems. The wireless microphone array that one company recently created with help from NASA can locate crop-threatening insects by listening for sound they make in fields. And now, it’s making fast, affordable testing possible almost anywhere
Air spring systems are challenging to mathematically model due to the complexity of their nonlinear dynamic characteristics. Numerous air spring mechanical and thermodynamic models have been proposed, but this study focused on the development and analysis of a new thermodynamic air spring model under a polytropic thermodynamic process that could accurately represent the force output in a multibody dynamics (MBD) virtual suspension subsystem. This model considered function inputs of sprung mass, un-sprung mass, and design height to efficiently generate updated air spring properties for new vehicle configurations, specifically for a self-propelled sprayer application. After this model was validated against physical ground-truth sensor data, it was utilized in a sensitivity study to experimentally test an alternative air spring component and to understand the resulting performance effect on an operator comfort key performance indicator
Adams, Bailey
Today’s engines used in Agriculture, Mining and Construction are designed for robustness and cost. Here, the Diesel powertrain is the established mainstream solution, offering long operation times without refueling at any desired power rating. In view of the steps towards Carbon Neutrality by 2050, this segment of the Transportation Sector needs to reduce its CO2 emissions. Currently, the EU and US emissions legislations (EU Stage V / EPA Tier4) do not include a CO2 reduction scheme, but this is expected to change with the next update towards EU Stage VI / EPA Tier5 coming into effect 2030 and after. Applications demanding high power or long operational range still require the use of renewable, liquid fuels or hydrogen. The cost-up of such fuels could be counterbalanced by more efficient engines in combination with a hybridized powertrain. The current paper therefore introduces a serial HEV solution for a large wheel loader application of 12t tipping load, which is an example of a
Weber, JostSchatorje, JesperFrekers, YonaHerrmann, OlafGries, Rafael
Modine exec says EV thermal management systems have evolved significantly from the technology used by ICE vehicles just five years ago. A rarity only a few years ago, electric vehicles (EVs) are becoming part of the daily lives of constantly increasing numbers of drivers. In the first quarter of 2024 alone, passenger EV sales soared by about 25% compared to the same period in 2023, according to the IEA's annual Global EV Outlook. While the passenger EV market charges ahead toward widespread adoption, the off-highway vehicle segment lags in electrification. The burly and rugged workhorses that do the heavy lifting in construction and agriculture have been slower in embracing electrification due to their heavier workloads and duty cycles. In addition to larger batteries, traction motors and countless other components, the electrification of this class of vehicles also requires a steep learning curve, all of which impact stakeholders up and down the value chain. For example, navigating
Bonini, Gina Maria
Deutronic is not alone in developing and integrating thermal-management solutions to meet the specific demands of off-highway EVs. Modine, for example, in 2023 launched a new edition of its EVantage battery thermal-management system with a liquid-cooled condenser (L-CON BTMS) that combines proprietary heat-exchanger technology with smart controls and electronics. The system is designed to withstand harsh environments found in mining, construction, agriculture, specialty and transportation applications, according to Mike Kis, Director of Advanced Thermal Systems at Modine
Bringing a construction project from planning on the page to execution in the real world is replete with challenges. Whether a company is building a sprawling solar farm or laying lines on the road, precision is paramount. Misfires of just a few inches can have massive implications, and that often leads to a plodding layout process. But, in partnership with Point One, Civ Robotics is ensuring that precise construction layouts won’t be at odds with efficiency
This research effort is to optimize the conditions to minimize carbon monoxide (CO) gas emissions utilizing activated carbon derived from rice husks, an abundant agricultural waste. In the automobile industry, addressing vehicular emissions is crucial due to environmental ramifications and stringent regulatory mandates. This study presents an innovative and potentially cost-effective solution to capture CO emissions, mainly from motorcycles. The eco-friendly nature of using rice husks and the detailed findings on optimal conditions (20 m/s gas flow rate, 0.47 M citric acid concentration, and 30 g mass of activated carbon) make this research invaluable. These conditions achieved a commendable CO adsorption rate of 54.96 ppm over 1250 s. Essentially, the insights from this research could spearhead the development of sustainable automobile exhaust systems. By integrating activated carbon into these systems, there’s potential to capture CO and possibly other detrimental gases, reducing the
Natrayan, L.Seeniappan, Kaliappan
With the modernization of agriculture, the application of unmanned agricultural special vehicles is becoming increasingly widespread, which helps to improve agricultural production efficiency and reduce labor. Vehicle path-tracking control is an important link in achieving intelligent driving of vehicles. This paper designs a controller that combines path tracking with vehicle lateral stability for four-wheel steer/drive agricultural special electric vehicles. First, based on a simplified three-degrees-of-freedom vehicle dynamics model, a model predictive control (MPC) controller is used to calculate the front and rear axle angles. Then, according to the Ackermann steering principle, the four-wheel independent angles are calculated using the front and rear axle angles to achieve tracking of the target trajectory. For vehicle lateral stability, the sliding mode control (SMC) is used to calculate the required direct yaw moment control (DYC) of the vehicle, and wheel torque distribution
Huang, BinYang, NuorongMa, LiutaoWei, Lexia
This SAE Standard characterizes grapple skidders and identifies the major components and parts most commonly associated therewith. Illustrations used herein are not intended to include all existing commercial machines or to be exactly descriptive of any particular machine. They have been included to facilitate application of this document
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In the last decades, the locomotion of wheeled and tracked vehicles on soft soils has been widely investigated due to the large interest in planetary, agricultural, and military applications. The development of a tire-soft soil contact model which accurately represents the micro and macro-scale interactions plays a crucial role for the performance assessment in off-road conditions since vehicle traction and handling are strongly influenced by the soil characteristics. In this framework, the analysis of realistic operative conditions turns out to be a challenging research target. In this research work, a semi-empirical model describing the interaction between a tire and homogeneous and fine-grained soils is developed in Matlab/Simulink. The stress distribution and the resulting forces at the contact patch are based on well-known terramechanics theories, such as pressure-sinkage Bekker’s approach and Mohr-Coulomb’s failure criterion. The force exerted by the soil on the sidewall of the
Zerbato, LucaVella, Angelo DomenicoGalvagno, EnricoVigliani, AlessandroData, SilvioSacchi, Matteo Eugenio
This SAE Standard applies to all forestry machines exposed to the hazard of objects penetrating the front of the operator station (other than the roof). This would include
MTC4, Forestry and Logging Equipment
Aluminium alloys enrolled their applications in automobile sectors, agricultural equipment, machine tools and aerospace because of their weight-to-strength ratio. Aluminium alloy 7075-T651 is an inevitable material used in engineering sectors. Turning is a metal removal process, to obtain net geometrical aspects and better surface finish of the products. The machinability of the turning operation is based on different factors; however, turning factors and material of tool plays a significant position in the turning process. To identify the truthful cutting parameters to achieve multi-responses in turning operation, the experiment was designed via Response Surface Methodology (RSM) Central Composite Design (CCD) and the experimental results are analyzed under the desirability approach. By trialing 26 interpretations in the desirability approach; the optimal cutting parameter settings of speed 800 rpm, feed rate 0.140315 mm/rev and depth of cut 0.3501 mm have been revealed to enhance
Sundarrajan, D.Senthil Kumaar, J. S.Muthiah, A.Manikandan, A.Sivakumar, N. S.
The basic needs of people are met by the building, fabric, and farming sectors. In addition, the automobile industry significantly contributes to human mobility and is essential to India’s economic expansion. There are numerous research strategies available to improve the bus body building industries. Several investigative approaches for enhancing bus body building industries are available. However, several of these studies merely look at it from the perspective of shop floor activity. Accordingly, when it comes to the execution of process design approaches, there is little practical evidence for accepting Gemba kaizen’s attitude. Hence, the purpose of this article is to present a continuous improvement redesign framework tailored to a specific bus body building industrial sector. The proposed model is structured after a critical examination of Gemba and Kaizen. The results showed that by implementing the improvement initiatives, the number of process activities decreased from 44 to 25
Balakrishnan, S.Senthilkumar, K.Rajkumar, V.Jerold John Britto , J.
This SAE Recommended Practice provides the minimum performance requirements and uniform laboratory procedures for fatigue testing of ferrous wheels and demountable rims intended primarily for off road use on agricultural machines (e.g., agricultural tractors, harvesters, trailers, and implements) and light construction machines (e.g., wheel loaders, backhoe loaders, dumpers, mobile excavators, and telehandlers). For other wheels intended for normal highway use and temporary use on passenger cars, light trucks, and multipurpose vehicles, refer to SAE J328. For wheels used on trailers drawn by passenger cars, light trucks, or multipurpose vehicles, refer to SAE J1204. For wheels intended for normal highway use on trucks, buses, truck-trailers, and multipurpose vehicles, refer to SAE J267. For bolt together military wheels, refer to SAE J1992. This document does not cover other special application wheels and rims
MTC8, Tire and Rim
When a specialty tractor is operated by mounting the front loader or backhoes, the loads are distributed proportionately to the front and rear axles. The maximum load and fatigue life were identified as the main parameters in predicting fatigue failure. This paper mainly focuses on predicting front axle loads and fatigue life in front loader applications. To design a new front axle for the loader application, an existing front axle assembly that was designed for orchard, sprayer, and small farm application is selected for study and to extend it for front loader application with minimal design modifications. The major challenge is to estimate the dynamic loads coming to the front axle due to the front loader application and validate it for a different set of load cases as per the design verification plan. Hence a methodology was framed to estimate the actual loads using MBD, validate with field measurements, and verify the new front axle design using those loads in FEA. This paper
Sekar, PrasanthVaradarajan, SivanesanBalaji, N. T.
Row-crop intercultural activities are widely affected by unavailability of manpower & seasonal nature. Current tractors with lower ground clearance are unable to access field after certain crop stage, may damage crop after certain growth. Some limited mechanization options available (self-propelled boom sprayer) are of higher cost. Crop care activities are intensive and observed consistent increase in cost. To address these challenges and unlock significant business benefits, a novel retro-fit height attachment for tractors has been developed. This attachment empowers tractors to access row-crop fields with crops standing at a height of up to 3 feet, effectively eliminating ground clearance constraints. The benefits of this innovative solution include enhanced accessibility, cost-effective mechanization, heightened operational efficiency, crop preservation, and improved sustainability
A, GokilaNatarajan, SaravananT, VimalrajSubbaiyan, Prasanna BalajiRS, VijayRedkar, DineshGupta Sr, Vishal
This project was undertaken with an objective to develop methodology by formulating set of procedures that would help in achieving the end goal. Once methodology is established, it paves way to optimize the end results more effectively which results in reduced lead time during product development. Methodology can either be based on pure experimental investigations or by simulations. Combination of mathematical and empirical approach is inherently followed in simulations, which helps in reducing the testing time and overall cost. Commercial vehicles (CV) have seen paradigm shift in the fuel consumption (FC) certification approaches, with an intention to align with 2016 Paris climate agreement. Use of simulation tool like VECTO for commercial vehicle FC certification has gained momentum in Europe. Overall experience gained in commercial vehicle FC simulation has motivated us to leverage the learnings for off-road applications like agricultural tractors. Tractors largely differ from CVs
Gijare, SumantKarthick, KJuttu, SimhachalamThipse, Sukrut SPaulraj, Lemuel SrinivasanB, JaiganeshT, Senthil KumarSridharan, Sudarsanam
The implementation of TREM/CEV 5 emission norms on farm equipment will bring in cost pressure due to the need for exhaust after treatment systems. This cost increase needs to be reduced by bringing in more efficient and effective processes to shorten the development phase and to provide better fuel efficiencies. In this work ETAS ASCMO Online DoE with Constraint Modelling (ODCM) was applied to execute smart online DoE on a new common rail diesel engine with EGR, whose exact bounds of operation was not available. A Global test plan with ASCMO Static was created without much focus on detailed constraints of engine operation, other than the full load curve. The parameters which were selected were Speed, Torque, Rail Pressure, Main Timing, EGR Valve Position, Pilot Separation and Quantity and Post Quantity and Separation. For these parameters, the safe operating bounds were not available. This ASCMO Static test plan is automated and executed on engine test cell with ETAS INCAFlow. ODCM at
Paulraj, Lemuel SrinivasanVarsha, AnuroopaKaradi, SubramanyaKumar, Devendra
An agricultural tractor is often modified for special farming applications such as horticulture where the standard design is not suitable or accessible. In such cases, farm equipment manufacturers are demanded frugal and cost effect Engineered farming solutions. One such design is the innovative High Ground Clearance Tractor (HGCT) kit offered to increase the Tractor height without damaging the crop during farming operations. In this paper, the author proposes a durability assessment method to evaluate the HGCT kit attachments to meet the durability criteria. Road load data acquisition is done to measure the acceleration and strain levels for various horticulture operations such as tillage, spraying and transportation. Actual operating conditions are simulated with the help of four poster durability setups inside the lab which helps to reduce the field testing for design iterations. Multi-body dynamics simulation (MBS) is used to front-load the four-poster lab testing in virtual and
Subbaiyan, Prasanna BalajiNizampatnam, BalaramakrishnaA, GokilaKumar, YuvarajJaiswal, SunnyPerumal, SolairajRedkar, DineshArun, GLondhe, AbhijitMani, SureshNatarajan, Saravanan
In farm tractors, the available drawbar power, and Power Take-Off (PTO) power are generally lower than the engine power due to parasitic losses. These losses are caused by engine-driven auxiliary loads such as cooling fans, hydraulic pumps for power steering, alternators, etc. Minimizing these parasitic losses can increase the available drawbar power and PTO power, resulting in direct fuel savings by reducing fuel consumption. The continuous increase in fuel costs and the environmental impact of emitted gases from burned fuel into the atmosphere have necessitated the replacement of hydraulic power steering and mechanical fans with Electric Power Steering (EPS) and electric fans, respectively, to improve efficiency. The existing battery has been replaced with a higher capacity battery to provide power to the electric fan, electric power steering, and other electrical components. Additionally, the existing alternator has been replaced with a higher capacity alternator to meet the
Arjun, P.Natarajan, SaravananChinnathambi, ManikandanA, RadhakrishnanNabar, Omkar
Customer expectations for cabin tractors from comfort perspective has grown multifold in the recent years. Cabin noise and vibration is one of the crucial parameters which drives comfort feel for the customer. This would enable customer to remain comfortable during long working hours. Moreover, Cabin Tractors with lesser noise levels found to have better acceptance by Customers all over the world. The Nebraska reports studied for US based tractor shows evolution of trend of cabin noise in 80-100HP tractors in last couple of decades. Undoubtedly, tractor manufacturers have put lot of efforts towards meeting legislation demand & stringent customer requirements for European and US market. This paper presents the work carried out for investigating major contributing factors affecting tractor cabin Noise & Vibration for a Noisy cabin tractor. Virtual and experimental studies have been carried out to identify the principal source of noise and the transfer paths for cabin noise distinguishing
Chavan, AmitK, SomasundaramGunasekaran, PandiyanayagamChaudhari, Vishal VSati, Navin
India is the market with the highest sales of agricultural tractors and the market with the highest number of agricultural tractor park, as well. Even though taking into account the lower average power of Indian agricultural tractors compared to regions with considerably larger field sizes, their cumulated diesel fuel consumption reaches a significant size. The possible use of alternative powertrains like battery-electric, especially considering the lower power of the Indian tractor market, seems feasible, but might be struggling with challenges in terms of charging infrastructure and the possibly resulting lower productivity due to required charging times. Therefore AVL proposes to investigate the use of alternative fuels for internal combustion engines, a topic which is also being discussed by other global tractor OEMs. In that context the focus is typically on higher tractor powers due to current storage limitations of battery-electric systems and other alternatives
Hofer, Franz JosefArnberger, AntonKruth, Ronald
Brazil has a robust agricultural sector; however, the mechanization of crops causes several problems in the physical soil structure, including surface compaction. Compaction reduces crop productivity and producer profits. The intensity of compaction varies depending on the wheelset model used, tire type, water content, and soil load applied. Recent studies have shown that soil compaction in sugarcane can be attenuated by maintaining the vegetation cover (straw biomass) on the surface after harvesting. The present study used different tire models to evaluate the interaction between wheelset-soil as a function of different amounts of biomass left over from the sugarcane harvest. A physical simulation system (fixed tire testing unit) was used for the tests. The wheelsets were subjected to controlled loads on tanks with confined and standardized soil samples. The treatments consisted of 3 tire models (p1: road radial, composed of double wheelset - 2×275/80R22.5; p2: agricultural radial
Filho, Aldir Carpes MarquesSartorio, Simone D. M.Martins, Murilo B.Lanças, Kléber P.
The mechanization of crops causes problems in soil structure as it causes compaction. Compaction can be severe depending on the type of tire adopted in the field. Producers are concerned with selecting wheelsets that harm the soil less and remembering to save resources when buying agricultural tires. Agricultural tires are more expensive than road tires, and truck tires can be an alternative for producers to save money. The present study evaluated the interaction between wheelset and ground in a fixed tire testing unit, comparing the impact of different tire models on bare ground. The 6 treatments performed consisted of 3 tire models (p1: road radial, composed of double wheelset - 2×275/80r22.5; p2: agricultural radial - 600/50r22.5; and p3: agricultural diagonal - 600/50-22.5) versus two contact surfaces, one rigid and the other with bare agricultural soil. Seven response variables were used to apply Regression analysis and descriptive statistics. Agricultural tires applied less
Filho, Aldir Carpes MarquesMedeiros, Simone D. S.Martins, Murilo B.Lanças, Kléber P.
Automated vehicles, in the form we see today, started off-road. Ideas, technologies, and engineers came from agriculture, aerospace, and other off-road domains. While there are cases when only on-road experience will provide the necessary learning to advance automated driving systems, there is much relevant activity in off-road domains that receives less attention. Implications of Off-road Automation for On-road Automated Driving Systems argues that one way to accelerate on-road ADS development is to look at similar experiences off-road. There are plenty of people who see this connection, but there is no formalized system for exchanging knowledge. Click here to access the full SAE EDGETM Research Report portfolio
Eley, T.C.King, John LeslieLyytinen, KalleNickerson, Jeffrey
Vehicles equipped with rubber track systems feature a high level of performance but are challenging to design due to the complex components involved and the large number of degrees of freedom, thus raising the need to develop validated numerical simulation tools. In this article, a multibody dynamics (MBD) model of a continuous rubber track system developed in Part 1 is compared with extensive experimental data to evaluate the model accuracy over a wide range of operating conditions (tractor speed and rear axle load). The experiment consists of crossing an instrumented bump-shaped obstacle with a tractor equipped with a pair of rubber track systems on the rear axle. Experimental responses are synchronized with simulation results using a cross-correlation approach. The vertical and longitudinal maximum forces predicted by the model, respectively, show average relative errors of 34% and 39% compared to experimental data (1–16 km/h). In both cases, the average relative error is lower for
Duhamel, OlivierFaivre, AntoinePlante, Jean-Sébastien
This SAE Recommended Practice identifies major components and parts peculiar to clam bunk skidders. Illustrations used here are not intended to include all existing machines or to be exactly descriptive of any particular machine. They have been provided to illustrate the principles to be used in applying this document
MTC4, Forestry and Logging Equipment
Continuous rubber track systems for farming applications are typically designed using multiple iterations on full-scale physical prototypes which is costly and time consuming. The development of numerical design tools could speed up the design process and reduce development costs while improving product performance. In this article, a rigid multibody dynamics (MBD) model of a continuous rubber track system is presented. This article is the first part of a two-part study: Part 1 focuses on the model description and part 2 describes the experimental evaluation of the MBD model. The modeling methodology is based on a track discretization as a set of rigid body elements interconnected by 6 degrees-of-freedom bushing joints. The mathematical formalism and experimental characterization of all critical subsystems such as the roller wheels, tensioner, suspensions, and contact models are also presented. Several simulation results are presented to illustrate the capability of MBD models in
Faivre, AntoineDuhamel, OlivierHemmatian, MasoudPlante, Jean-Sébastien
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