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Research & Devlopment Institute-JAGANNATHAN VASU
  • Technical Paper
  • 2019-28-2531
To be published on 2019-11-21 by SAE International in United States
A DIGITALIZED VALIDATION APPROACH FOR REAL TIME AND REMOTE MONITORING OF AN OFF-HIGHWAY VEHICLE PERFORMANCE V.Jagannathan 1.a* , B.Jaiganesh 2.b & S.Sudarsanam 3.c Mahindra & Mahindra Limited, Mahindra Research Valley, Mahindra World City, Anjur PO, TN, India Corresponding author Email- Validation of agricultural tractors is necessary to ensure that these machines perform to their expected potential and are aptly matched with implements. Testing these machineries in real-time while performing activities in the field allows a bigger picture to be seen; the performance data incorporates the effects of many external factors (Soil, Climate etc.). Tractor Performance data apprehending is the vital part of validation. Data acquisition of key performance parameters during field validation in different application/different countries is of utmost importance. Most prevailing methodology in Tractor validation is by capturing the performance parameters such as Fuel consumption, Area coverage, Wheel slip, Engine rpm drop, implement depth of cut, Tractor speed etc. in manual and physical way. These methodologies of capturing performance parameters are tedious, time consuming, involves manpower, not so secured or safe. The readings…

Investigation of Transmissibility of an all-terrain vehicle with spring and damper tuning.

ARAI Academy-Rajat Girish Kanade, Mohammad Rafiq Agrewale, Kamalkishore Vora
  • Technical Paper
  • 2019-28-2423
To be published on 2019-11-21 by SAE International in United States
The application in ride and handling development has been mostly subjective or intuitive. Suspension settings are based on the opinions of experts. The product of this research will enable to quantify the performance of a suspension in terms of its ability to minimize the transmission of road irregularities to the chassis and achieve good mechanical grip with the road surface. This work presents a dynamical analysis of the transmissibility of an off-road vehicle suspension, developed in VIT Vellore for Baja SAE India competition. A baseline spring rates curve for ride is developed to provide a solid foundation to tune from. The shock absorbers used for testing are Fox Float Evol R air shock absorbers with progressive damping. A thorough data acquisition of the force curves for shocks from a test rig is done. A detailed characteristic of the air shocks is obtained at various loading conditions. The basic damping curve is modified towards the desired ideal nature with the data obtained. The speculated optimum setting is validated on the ATV vehicle with ultrasonic sensors and…

Transient Response Analysis and Synthesis of an FSAE Vehicle using Cornering Compliance

SRM Institute Of Science And Technology-Vasanthkumar CH, Shubham Subhnil, Pranav Suresh, K Kamalakkannan
SRM Institute of Science & Technology-Nanthakumar Ajd
  • Technical Paper
  • 2019-28-2400
To be published on 2019-11-21 by SAE International in United States
OBJECTIVE Race vehicles are designed to achieve higher lateral acceleration arising at cornering conditions. A focused study on the steady state handling of the car is essential for the analysis of such conditions. The transient response analysis of the car is also equally important to achieve best driver-car relationship and to quantify handling in the range suitable for a racing car. This research aims to investigate the design parameters responsible for the transient characteristics and optimize those design parameters. This research work examines the time-based analysis of the problem to truly capture the non-linear dynamics. Apart from tires, chassis can be tuned to optimize vehicle handling and hence the response times. METHODOLOGY To start with, the system is modelled with governing parameters and simulation is carried out to set baseline configurations. Steady state and transient handling simulations run independent of each other with independent logic, coded on MATLAB. The static testing of the chassis is carried over using a Kinematic & Compliance (K & C) testing rig to get Compliance Budget and hence the calculated…

Damage matching criterion for development of accelerated duty cycle from road load data, and achieving right duty cycle to determine gear and bearing durability.

Romax Solutions-Amol Korde
  • Technical Paper
  • 2019-28-0121
To be published on 2019-10-11 by SAE International in United States
While designing the transmission, designer needs to have a duty cycle which is a set of load cases against which he wants to confirm the durability of the same. This is done through data acquisition by running a vehicle on various terrains and converting those data points to a concise set of load cases which we term as duty cycle. This is required because data acquired has millions of data points giving value of torque and RPM at every millisecond which cannot be directly used to assess the fatigue durability of gears and bearings. Converting these millions of road load data points into fewer number of load cases is always a challenge. For a transmission designer, it is being a major hurdle to determine as what is the scientific way of converting these millions of data points into a concise duty cycle. The road load data is taken for few hundred or few thousand kilometres covering enough types of terrains on which vehicle is expected to run. But the methods available with todays engineers does…

Torsional Stiffness Analysis Of Tubular Space-frame Chassis

SRM Institute of Science and Technology-Venkata Naga Bhavani Prasad Sodisetty, Anurag Pandey, Devansh Balachandran Iyer, Navneet Kumar
  • Technical Paper
  • 2019-28-0033
To be published on 2019-10-11 by SAE International in United States
Torsional Stiffness is required in an automotive when there is a lateral load transfer as it happens during turning. It also occurs when there is bump on one side of a chassis while droop on the other. A torsionally stiff chassis would provide better stability and uniform load transfer in an automotive. The lateral members in a chassis play a crucial role in increasing the torsional stiffness but they result in increased weight. The relation between mass and structural stiffness of a chassis is crucial to optimize the dynamics of an automotive. The current trends in research aim at increasing the torsional stiffness and optimizing mass for the same and thus increasing the stiffness to mass ratio. This is validated with the help of various FEA softwares. The different cases involved in real world scenario are simulated and then the stiffness is optimized accordingly. This FEA analysis is further validated using experimental analysis. An experimental jig is fabricated and setup for every condition. Static conditions are used for both FEA and experimental analysis. A list…

Development of Data Acquisition and Analysis System:Telemetry in Automotives

Vellore Institute of Technology-Divyansh Rastogi, Gokul Kumar, Chooriyaparambil Damodaran Naiju
  • Technical Paper
  • 2019-28-0075
To be published on 2019-10-11 by SAE International in United States
Digital Data extraction is the most important and advance informative system that are embedded in the modern world functioning machinery to acquire the most precise feedback about the real-time operational situation of the machine to the control center of operation. This data that is acquired from the machinery can be used to increase the Efficiency, Operational timing, Production-cost and the overall Human Effort that is required for the operation. This Article focuses on the development on the advance Telemetry System that is capable to acquire Real-time data of the modern vehicle wirelessly during its motion. A mobile automotive telemetry System for installation on-board a vehicle, includes: (i) diagnostic structure for monitoring operational functions of the vehicle and generating operational information; (ii) a memory for storing the generated operational information; and (iii) a server, in communication with the diagnostic Structure and the memory. The server includes: (a) structure to receive a request from a remote client for the generated operational information; (b) structure to retrieve the generated operational information from the memory; and (c) structure to…

Optical Sensor for the Needle Lift Detection in the Common Rail Injector

The University of Birmingham, UK-Carlo Coratella, Lewis Parry, Amrit Sahu, Hongming Xu
  • Technical Paper
  • 2019-24-0193
To be published on 2019-09-09 by SAE International in United States
The displacement of the control piston within a Common Rail injector is a key area that requires more focus to suitably characterise the behavior of an injector, it is a key element to discuss when investigating in-nozzle phenomena, the needle displacement is typically measured with a eddy current sensor. Apart from its high cost, scientific literature highlights its drawbacks, such as the introduction of mechanical weakness on the control piston as well as an electromagnetic disturbance affecting the data acquisition. Other solutions have been developed which provide an improved quality of signal. Nonetheless, such solutions require a high number of components which leads to an increased layout complexity. This layout can create a packing issue when trying to mount the sensor on the test rig. A novel sensor (UK Patent Application No.1819731.9) has been designed and built to overcome the limitations typically associated to the needle displacement transducers. Variation in light intensity detected by a receiver underlies the working principle of the sensor and is in a direct relationship with the needle displacement. This paper…

Barkhausen Noise Inspection for Detecting Grinding Burns in High Strength Steel Parts

AMS K Non Destructive Methods and Processes Committee
  • Aerospace Standard
  • ARP4462B
  • Current
Published 2019-06-06 by SAE International in United States
This recommended practice establishes the requirements and procedures for Barkhausen Noise (BN) inspection of ferromagnetic steel components. Applications of the method are listed in 1.2 through 1.5.
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Developing a Custom Data Acquisition Software Package for a Self-contained Acoustic Test Facility

Kolano and Saha Engineers, Inc.-Richard Kolano, Sagar Patil, Pranab Saha
Published 2019-06-05 by SAE International in United States
This paper provides an overview of a custom software developed to obtain measurement data in a self-contained acoustic test facility system used for conducting random incidence sound absorption tests and sound transmission loss tests on small samples in accordance with SAE J2883 and J1400 standards, respectively. Special features have been incorporated in the software for the user to identify anomalies due to extraneous noise intrusion and thereby to obtain good data. The paper discusses the thoughts behind developing user-friendly algorithms and graphical user interfaces (GUI) for the sound generation, control, data acquisition, signal processing, and identifying anomalies.
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The Utilization of Onboard Sensor Measurements for Estimating Driveline Damping

Michigan Technological University-Jon Furlich, Jason Blough, Darrell Robinette
Published 2019-06-05 by SAE International in United States
The proliferation of small silicon micro-chips has led to a large assortment of low-cost transducers for data acquisition. Production vehicles on average exploit more than 60 on board sensors, and that number is projected to increase beyond 200 per vehicle by 2020. Such a large increase in sensors is leading the fourth industrial revolution of connectivity and autonomy. One major downfall to installing many sensors is compromises in their accuracy and processing power due to cost limitations for high volume production. The same common errors in data acquisition such as sampling, quantization, and multiplexing on the CAN bus must be accounted for when utilizing an entire array of vehicle sensors. A huge advantage of onboard sensors is the ability to calculate vehicle parameters during a daily drive cycle to update ECU calibration factors in real time. One such parameter is driveline damping, which changes with gear state and drive mode. A damping value is desired for every gear state. Recent years have seen an increasing number of forward gear ratios, from 8-10 in production vehicles.…
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