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Modelling and validation of a Control Algorithm for Yaw stability and Body Slip Control using PID and fuzzy Logic based controllers

VIT University-Umashankar Lath, Sanyam Kakkar, Aman Agarwal, Bragadeshwaran Ashok, Vemuluri Ramesh Babu, Sathiaseelan Denis Ashok
SITAMS-Chellappan Kavitha
  • Technical Paper
  • 2019-28-0054
To be published on 2019-10-11 by SAE International in United States
Advanced driver-assistance system (ADAS) is becoming an essential part of modern commercial vehicle. At any instance Vehicle handling and stability is determined by the yaw rate and body slip of the vehicle. Active steering control with Electronic brake force distribution system can help in precise control of body slip and yaw control. In most of the existing research work on active steering, Control algorithms are based on single track vehicle (2 DOF) with a linear tire model for calculating the desired parameters. But these simplified model fails at high speed, tight corners and in case of combined tire slip as it neglect parameters like the non-linearity of tire model, Ackermann of the steering system and effect of two track on the stability of vehicle. The aim of this research work is to fill the existing research gap by incorporating all the mentioned drawback in a new control algorithm. A Full vehicle 14 DOF and 6 DOF model with a nonlinear tire model based on Pacejka’s “Magic tire formula” was made in Simulink, the two track…
 

Design and Analysis of Automotive Steering Sheet Metal Yoke for High Strength and Rigidity Requirement

VIT University-Aditya Yadav
Rane NSK Steering Systems Pvt. Ltd.-Chaitanya Gandhi, Pranav Shinde, Mohanraj Ramamoorthi, Bharathkumar Krishnadoss
  • Technical Paper
  • 2019-28-0122
To be published on 2019-10-11 by SAE International in United States
The increasing demand for light weighting products due to introduction of various standards and norms for controlling CO2 emissions and to meet the customer requirement of low cost with higher strength and rigidity of product in automotive industry, sheet metal manufacturing technique is adopted for automotive steering yoke for light commercial vehicle. Currently forged yokes are used for higher strength requirement, while sheet metal yokes are being used for small tonnage vehicle. The attempt has been done to improve overall strength and rigidity of the yoke produced by sheet metal operation using SAPH440 steel with 6.5mm thickness for light commercial vehicle segments. The major challenge identified for this development was developing such a high strength and thickness material with consistency of dimension during forming process and meeting the torsional strength requirement of 500 Nm. In this development with the help of plastic data, the forming analysis for yoke model has been carried out to analyse the feasibility of the design at desired thickness of yoke considering the dynamic bending force, spring back effect and residual…
 

Neural Network based virtual sensor for throttle valve position estimation in a SI Engine

VIT University-Bragadeshwaran Ashok, Sathiaseelan Denis Ashok, Chidambaram Ramesh Kumar
SITAMS-Chellappan Kavitha
  • Technical Paper
  • 2019-28-0080
To be published on 2019-10-11 by SAE International in United States
Electronic throttle body (ETB) is commonly employed in an intake manifold of a spark ignition engine to vary the airflow quantity by adjusting the throttle valve in it. The actual position of the throttle valve is measured by means of a dual throttle position sensor (TPS) and the signal is feedback into the control unit for accomplishing the closed loop control in order handle the nonlinearities due to friction, limp-home position, aging, parameter variations. This work aims presents a neural networks based novel virtual sensor for the estimation of throttle valve position in the electronic throttle body. Proposed neural network model estimates the actual throttle position using three inputs such as reference throttle angle, angular error and the motor current. In the present work, the dynamic model of the electronic throttle body is used to calculate the current consumed by the motor for corresponding throttle valve movement. Proposed virtual sensor is tested for the sinusoidal and random driving cycle throttle angle input using a Bosch DVE5 electronic throttle body. Estimated throttle valve angle using the…
 

Design and Development of a Dry Sump Lubrication System for a Formula SAE Race Car

VIT University-Rishabh Khanna, Akshyt Bimal Kumar, Kartik Vijaykumar, K Nantha Gopal, Ashok B, Sahil Sharma, Vignesh Ravi
Published 2019-01-09 by SAE International in United States
A Formula student team aims to develop and improve their designs every year, as far as the powertrain aspect is considered performance output and enhancement is the primary aim, and for engine to perform better, the health of the engine is the most important parameter; hence the lubrication system of the vehicles powertrain should be improved to get the most out of the engine. The primary challenge for the development of a new lubrication system was the inability to replicate the performance given by stock wet sump with the self-designed custom dry sump. However, the advantages can outnumber the cons of implementing a custom dry sump lubrication system. The work brought together in this paper highlights the meticulous design procedure for implementing a custom made dry sump system onto a 4-cylinder in-line Honda CBR600RR engine. Moreover, the research paper brings about the extensive process undertaken which includes theoretical calculations, computational analysis and experimental validation of the whole assembly the dry sump system. The design procedure makes use of software like MATLAB, Star CCM+ and SolidWorks.…
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Chemical Kinetics Modelling of Exhaust After-Treatment System: A One Dimensional Simulation Approach

VIT University-K Vamshi Krishna
Tata Motors, Ltd.-Nitin Chauhan, Manish Shrivastava
Published 2019-01-09 by SAE International in United States
The Indian automotive industry has taken a big leap towards stringent Bharat Stage VI (BS VI) emission standards by year 2020. A digital driven design and development focusing on innovative and commercially viable technologies for combustion and exhaust after-treatment system is the need of the time. One-dimensional (1D) simulation serves as a best alternative to its counterparts in terms of obtaining faster and accurate results, which makes it an ideal tool for carrying out optimization studies at system level. In this work, 1D chemical kinetics modelling and analysis of exhaust after-treatment system (EAT) for a heavy-duty diesel has been performed using GT-Power.Initially, a single site 1D model for a diesel oxidation catalyst (DOC) has been developed and then, a two-site, 1D model for a selective catalytic reduction (SCR) catalyst was also developed based on reactor data. Genetic algorithm was used to calibrate the rate constants of the Arrhenius equations for the reactions with the experimental data. The calibrated 1D SCR model along with 1D models of other sub-components of the EAT system has been used…
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Vehicle Side Safety Enhancement through Door Intrusion Barrier Analysis and Recuperation

VIT University-Abinav Shankar Siva Balan, Ashok Bragadeshwaran, Gowutham Eswaramoorthy, Arun Pandiyan Rajendran, Vemuluri Ramesh Babu
Published 2019-01-09 by SAE International in United States
The automobile industry is making huge strides to improve vehicle and occupant safety. A lot of safety improvements and modifications have been made in the past decade. But the side impact is still overlooked as not much has been improved for side safety despite most of the accidents and collisions happen to the side of a vehicle. Door intrusion barriers are the primary protection feature along with A, B and C pillars. Crashworthiness mainly depends on the position, cross-section and material of the intrusion barrier. So, our work mainly focuses on finding the optimum position, choosing the correct cross-section and finding the right material for the intrusion barrier. The objective of this project is to minimize the damage to the side of the vehicle by increasing its crashworthiness thereby reducing passenger injuries. A model of a vehicle door has been designed in Solid Works and various cross sections of door intrusion barriers like circular, rectangular, H-section, I section, E and C section have been developed. The crash test has been conducted according to New Car…
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Optimization of Process Parameters for Electro Discharge Machining of Al 7075-Al2O3 Nano Composite Using Different Electrode Materials

VIT University-Kannan C, R Ramanujam PhD, A S S Balan PhD, T Vijayakumar, C Karunakaran
Published 2018-07-09 by SAE International in United States
In the present study, an aluminium based nanocomposite, reinforced with 2 wt. % aluminium oxide (Al2O3) is developed through stir casting method. These hard ceramic particles also influence the material removal rate (MRR), electrode wear rate (EWR) and surface finish (Ra) in an electro-discharge machining (EDM) process. In this work, EDM of Al 7075/2 wt. % Al2O3 nanocomposite is carried out using copper and brass electrodes using Taguchi L18 array. The percentage contribution of each process parameter on the response variables was determined using analysis of variance (ANOVA). Multi-response signal to noise ratio (MRSN) and the optimum combination levels for the input parameters was obtained using Taguchi’s parametric design. MRR and surface roughness are substantially improved when machining is performed at optimized conditions.
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Development of Variable Stiffness Suspension System Considering Handling, Comfort and Structural Fatigue

VIT University-Maharishi Patel, Kannan C
Published 2018-07-09 by SAE International in United States
This paper describes the development of a varying stiffness suspension system to have better control over handling, comfort and structural fatigue of automobiles. Earlier approaches resulted in cumbersome designs and resulted in higher lateral forces on coil springs and structural fatigue. In this work, an initiative has been taken considering all these factors and optimizing the design at every stage of development to achieve lightweight and economical suspension system to meet the objectives. The variable stiffness is achieved through the relative travel of spring with respect to the wheel travel for different configurations. For this purpose, a stepper motor drive is employed to move the hinge point in the angular arch. The developed design is also examined through mathematical modeling and the MBD simulations. It is found that that the proposed design has the capability of facilitating better handling and comfort characteristics without much compromise on the overall cost of the suspension system.
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Theoretical Analysis of High Thermal Conductivity Polymer Composite Fin Based Automotive Radiator under Forced Convection

VIT University-M A Vadivelu, C Ramesh Kumar, C D Naiju
Published 2018-07-09 by SAE International in United States
Though high thermal conductivity polymer composites are prepared based on the thermal requirements, the effectiveness and overall heat transfer performance of the radiators have to be addressed comprehensively to validate the concerned efforts taken to prepare the high thermal conductivity polymer composites. In this article, theoretical analysis on the thermal performance of the cross flow type heat exchanger under convection is performed only by concentrating on the term thermal conductivity of the material. Micro channel based geometry is extracted from the given heat exchanger problem to reduce the complexities of simulation. The term cooling system performance index (CSPI) is used to achieve the expected targets in the present investigation. For shorter fins, the effect of thermal conductivity on the cooling system performance index under lower Reynolds number is insignificant. Further discussions on effect of thermal conductivity on various cases are presented with brief explanations.
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Experimental Field Performance Analysis of Small Weed Remover in Sugarcane Grassland

VIT University-Prabu K
B S Abdur Rahman Crescent University-Jeyakumar P D, M Thirumurugan
Published 2018-07-09 by SAE International in United States
Agriculture is a backbone of country’s economy. To increase the crop production efficiency weeds are to be removed. The present weeding machines are different in dimension which may not be suited to small and medium field farmers, due cost effectiveness and dimensions. This work presents the development of sugarcane weed remover (SWR) and its performance investigation to improve the weed removal rate. The SWR is an application specific machine, it consists of single cylinder air cooled gasoline engine, blade assembly and transmission system. In order to improve SWR efficiency different blade profiles are theoretically analysed. The optimised blade profile is employed in the weed remover which offers fuel consumption of 0.11 g/(KW.h). The SWR on-field experience confirmed that the field capacity and efficiency in weeding is 0.0025 ha/hr and 60% respectively.
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