Your Selections

John Deere India Pvt. Ltd.
Show Only

Collections

File Formats

Content Types

Dates

Sectors

Topics

Authors

Publishers

Affiliations

Events

   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Thumb Design and Optimization for Backhoe Loader

John Deere India Pvt. Ltd.-Sandeep Dhotre, Surya Pratap Ponnana, Amit Ghate
John Deere C&F-Kurtis Langner
  • Technical Paper
  • 2019-28-0109
To be published on 2019-10-11 by SAE International in United States
Product Engineering organizations are committed to provide solutions with the right quality and value to customers. Value improvement and efficient product improvement are key considerations for product engineering.In this paper, the Author summaries thumb design and optimization for backhoe loader. The project goal was to create an in-house thumb design. The backhoe thumb attachment was previously a proprietary design of a supplier. The supplier’s design had two major limitations, limited opportunity of design improvements for resolving customer issues and higher total cost. This paper covers details about overcoming these limitations.Multiple variants of backhoe loaders use four different thumbs. Small and mid- range backhoe machine classes use 4-tine and 2-tine thumb depending upon customer applications. The design team targeted an external customer requirement of a more compact design and internal requirement of accelerating design improvement cycle time and reducing cost. To overcome these concerns, along with few more constraints, a full study of a new thumb design was conducted. Key constraints included compatibility to current design, maintain tip forces, and optimize for a compact design. Verification…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Prediction of Hydraulic Cavitation Using 1D Simulation

John Deere India Pvt. Ltd.-Vinit Jawale, Ameya Bandekar
VJTI-Pritam Shinde, Addanki Rao
  • Technical Paper
  • 2019-28-0129
To be published on 2019-10-11 by SAE International in United States
Hydraulic Cavitation is, in many cases, an undesirable occurrence. It is the formation and collapse of air cavities in liquid. In hydraulic devices such as pumps, motors, etc. cavitation causes a great deal of noise, local erosion, damage to components, vibrations, increases oil contamination and a loss of efficiency. There is already established process of predicting cavitation using 3D simulation software. However, the model development is the time-consuming process as well as prediction process is component /subsystem level and cannot be done for various duty cycle operations at architecture level. That requires exploring our research in 1D simulation technique for prediction of cavitation. In this research, we have developed and implemented a methodology/mathematical model for the prediction of hydraulic cavitation in hydraulic system using a 1D simulation technique. For simulation purpose, we have taken an example of simple hydraulic system and predicted the cavitation in one of the component/subsystem of hydraulic system for ambient conditions. The mathematical model proposed based on mass transport equations of vapor, liquid and gas, Rayleigh-Plesset equations, Singhal model and bubble…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Modeling Tracked Vehicle to Determine Undercarriage Performance

John Deere India Pvt. Ltd.-Goutam Shriyan, Vikas Vithal Kshirsagar
  • Technical Paper
  • 2019-28-0116
To be published on 2019-10-11 by SAE International in United States
In tracked vehicles, the undercarriage frame components such as track shoes, sprocket, idler, rollers and their configuration plays an important role while transferring the loads from the ground to the main frame. To understand the loads coming on the upper frame and understand the power consumed to drive the vehicle, it is important to model the undercarriage components. This paper presents the methodology for modeling track systems dynamics and its energy analysis. A 3D model of tracked vehicle was developed using commercially available Multi-Body Dynamics tool and validated against test results. The contact parameters between ground and track shoes was determined by varying their values within a defined range based on empirical data available. The undercarriage performance was measured by determining the power required by the hydrostatic drivetrain motor. The contact friction between the sprocket and the track shoe is important to properly transfer the motion from the sprocket to track chain. This value is determined by measuring the power required in the test and estimating the friction value accordingly in the model. This model…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Development of a Simulation Model for Computing Stable Configurations for Off - Road Vehicle

Piyush Kailash Malviya
John Deere India Pvt. Ltd.-Vinit Shashikant Jawale, Ojas Patil, Ameya Bandekar
  • Technical Paper
  • 2019-28-0126
To be published on 2019-10-11 by SAE International in United States
Off-highway vehicles operate under complex duty cycles which consist of handling varying terrain conditions under dynamic loads. A challenge for the equipment operator is to maintain stability of the vehicle during various field operations. The operator must make judgment calls on whether terrain and loading conditions are suitable for vehicle stability. In view of the increasing emphasis being placed on operator comfort and vehicle autonomy, a methodology to predict the degree of vehicle stability in varying terrains and dynamic loads will be an aid in designing safer vehicles. This paper describes a mathematical model capable of predicting the longitudinal overturning behavior of off-highway vehicle. A mathematical kinematic and dynamic model of the system is developed using Newton-Euler approach. This yields a system of non-linear equations which can be solved iteratively by using any commercial software to predict stability for varying terrains and dynamic loads. Given a vehicle geometry and terrain conditions, this methodology allows the simulation and prediction of various longitudinal overturning situations under dynamic loading. The modularity and scalability of the methodology will allow…
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Construction Equipment’s Bucket Design Based on Soil-Tool Interaction-Analytical and DEM Approach

John Deere India Pvt. Ltd.-Arun Narayanan, Sagar Bhojne
Published 2017-01-10 by SAE International in United States
In Earth Moving Machines, performance of an attachments play crucial role in determining the machine performance. Application of the machine is one of the main factors to be considered for bucket design. Different types of buckets are offered in the market to suit the particular application. Trenching, digging, moving loose material are some of the operations done with the backhoe bucket. While operating in these areas bucket handles intact soil, granules, loose rocks etc. Properties of these materials play important role in bucket design methodology. In this paper efforts are made towards understanding the properties of soil along with soil failure mechanism and utilizing these inputs to design a backhoe bucket for better machine productivity. Mathematical modeling and Discrete Element Modeling (DEM) are the tools used for design and validation of this work. Mathematical modeling is intended to understand the efforts required to break the intact soil while the properties of soil are known. Mathematical modeling approach is compared with the DEM study to find the correlation and closeness of both the methodologies. Based on…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Thermal Management and Sensitivity Study of Air Cooled SMPM Motor

John Deere India Pvt. Ltd.-Bhupesh Agrawal, Mohit Varma
College of Engineering Pune-Chandrashekhar Sewatkar
Published 2017-01-10 by SAE International in United States
High temperatures in the surface mounted permanent magnet (SMPM) synchronous motor adversely affect the power output at the motor shaft. Temperature rise may lead to winding insulation failure, permanent demagnetization of magnets and encoder electronics failure. Prediction and management of temperatures at different locations in the motor should be done right at the design stage to avoid such failures in the motor. The present work is focused on the creation of Lumped Parameter Thermal Network (LPTN) and CFD models of SMPM synchronous motor to predict the temperature distribution in the motor parts. LPTN models were created in Motor-CAD and Simulink which are suitable for parameter sensitivity analysis and getting quick results. Air is assumed to be a cooling medium to extract heat from the outer surface of motor. CFD models were useful in providing elaborate temperature distribution and also locating the hot-spots. Correlation models by both the methods, viz. LPTN and CFD, were generated. The effect of changing the motor orientation, magnitude of air inlet velocity, direction of air-flow and the effect of axial fins…
This content contains downloadable datasets
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Displacement Joystick/Thumb Wheel Switch Control Profile for Precision and Jerk Free Speed Control Application in Open Loop System

SAE International Journal of Commercial Vehicles

John Deere India Pvt. Ltd.-Sanket Pawar
  • Journal Article
  • 2015-01-2870
Published 2015-09-29 by SAE International in United States
Displacement joystick controls are considered as most suitable for manual controls wherever proportional outputs are required for dynamic applications such as when variable speed sensitivity or position are required. These joysticks are being used widely in both open loop as well as in close loop controls. The operator applies force to either the joystick itself or to its proportional linear displacement thumb wheel switches. This movement is then detected by either resistive or Hall Effect sensors, placed right inside joystick, and converted into an electrical signal. These joysticks, along with proportional linear displacement thumb wheel switches, find a wide range of applications in off-road vehicles such construction and forestry vehicles, harvester machines, and etc. for applications like attachment speed controls, boom position control, rotation speed control, and etc. The higher the displacement of the joystick, or its linear displacement thumb wheel switches, the better will be the control over the control parameter.When it comes to open loop attachment control systems, where joystick displacement is directly linked with speed, most times the displacement provided by joystick…
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Agricultural Tractor's Footrest Vibration Reduction

John Deere India Pvt. Ltd.-Vilas Gorakh Umbare
Published 2013-01-09 by The Automotive Research Association of India in India
The design and analysis plays a major role for determining the root cause for the problem. Once the problem and its root cause were well defined, the solution for addressing the problem would be made clear.The engine excitation frequency and the chassis natural frequency were coming closer and it leads chassis to resonate. The resonance increases vibration levels at the Tractor footrest which was reducing comfort level of the operator.The vibration reduction methodologies like stiffening the structure, isolating the source from excitation and dampening techniques were studied to reduce vibration levels at footrest. The benchmarking evaluation was done with selected tractor models qualitatively to assess the difference in vibration level perception for customers. The test methodology and data acquisition methodology was formulated and used for better analysis and discussions.In this paper, the author demonstrated the systematic approach to reduce tractor footrest vibrations by 20%-25% through concept design, virtual analysis and experimental validation.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Gear Rattle Noise Prediction from Dynamic Simulation

SAE International Journal of Commercial Vehicles

John Deere India Pvt. Ltd.-Amit J Bora
John Deere, USA-Robert White, Dalsang Chaudhari
  • Journal Article
  • 2011-01-2242
Published 2011-09-13 by SAE International in United States
Gear rattle noise is a common issue in manual gear transmissions and is often difficult to resolve. This paper discusses a methodology involving development of a simulation model for noise prediction and subsequent design of experiments (DOE) analysis to select optimal design parameters to reduce rattle noise. A one-dimensional torsional vibration simulation model for a tractor driveline was developed and was correlated with experimental measurements. This correlated model was used to calculate the torque variation between the gear pairs based on engine excitations. The standard deviation of this mesh torque was used as a metric and was correlated to noise ratings assigned by experts during experimental evaluation. Using this metric as the response variable, a DOE was conducted to determine the contributing factors and their influence on the rattle noise. Optimal design parameters were selected to achieve target value on the rattle metric. Physical prototype was built using these optimized parameters and was validated against noise ratings assigned by experts. It was found to successfully satisfy the subjective rattle criterion.
Annotation ability available
   This content is not included in your SAE MOBILUS subscription, or you are not logged in.

Experimental and Modeling Studies Towards Random Vibration

John Deere India Pvt. Ltd.-G. Pandiyanayagam, Prashant Bardia, Yuvraj Patil
Published 2011-01-19 by The Automotive Research Association of India in India
The estimation of the mechanical reliability of the Printed Circuit Board (PCB) in an electronic system is considered to be an important part of the overall reliability of the system. The vibration often plays the key cause of invalidation and component failures. Since it is known that such vibration factors can induce various failures, an understanding of their dynamic response is warranted. Random vibration test is specified for acceptance tests, screening tests and qualification tests as it more closely represents the true environment in which electronic system must operate. In order to achieve a good vibration analysis, it is first necessary to efficiently and accurately understand the dynamic behavior of the system when subjected to specific environment like random vibration. Once the methodology is built, it can be applied for analyzing various systems with greater confidence in estimating their dynamic response.This paper focuses on the methodology to understand and predict the dynamic behavior of the system using various approaches (like theoretical, numerical and experimental). The modal response of the model is acquired through the theory…
Annotation ability available