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K. Prabu ¹, J. Jancirani ¹

Affiliations
1 Department of Automobile Engineering, M.I.T Campus, Anna University, Chennai-44, IN

Abstract

This paper is concerned with studying the response of a hybrid magnetic vehicle suspension system. The objective of this work is to produce vehicle body isolation by reducing the sprung mass acceleration and minimize the suspension travel, to produce good road holding ability. Two degrees of freedom quarter car model of a passive suspension system with a cylindrical type hybrid magnet is considered for the analysis. Analytical modelling, simulations and laboratory scale experiments are conducted. The performance of active suspension systems from simulations using MATLAB and experiments are compared with the passive suspension system. The amplitude of vibration of the sprung mass using active suspension is considerably reduced from that of passive system.

Keywords

Vehicle Suspension System, Hybrid Magnet, System Dynamics, Proportional Integral Controller.

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P. Sathishkumar ¹, J. Jancirani ², D. John ², B. Arun ²

Affiliations
1 Dept. of Automobile Engg., SRM University, Kattankulathur, IN
2 Dept. of Production Tech., MIT Campus, Anna University, Chennai, IN

Abstract

This article discusses methods to reduce the acceleration of a vehicle and increase its road holding ability. In the simulation using quarter car model, electric actuator and air spring based actuator are used as the main control elements. A three degrees of freedom system model is used in which the parameters for the tire, vehicle body and seat are considered. The required actuator force is calculated by a standard fuzzy controller. For analysing the performance of active suspension system, body acceleration and velocity are given as inputs to the controller according to ISO specified standards. Accelerations of the seat and vehicle body are used to judge the performance of the system.

Keywords

Quarter Car Model, Active Suspension System, Electrical Actuator, Air Spring Actuator, Fuzzy Logic Controller.

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J. Jancirani ¹, P. Sathishkumar ¹, Manar Eltantawie ², Dennie John ¹

Affiliations
1 Department of Mechanical Engg., Anna University, Chennai, IN
2 Mechanical Engg. Dept., Higher Technological Institute, Sixth of October City, Giza, EG

Abstract

The present article introduces an approach that combines modelling and simulation of air spring actuator and electro-hydraulic actuator for comparison in automotive suspension system. Both hydraulic and air spring actuators are controlling the vehicle body by developing a desired force between sprung mass and unsprung mass using fuzzy logic controller. The vehicle body along with the wheel system is modelled as a two degree of freedom quarter car model. The actuator performance is investigated using the quarter car suspension model under single road bump with severe peak amplitude excitations and random road input. From the results of simulation, it can be concluded that air spring actuator gave better performance than electro-hydraulic actuator in all conditions under vertical body deflection.

Keywords

Air Spring Actuator, Electro-Hydraulic Actuator, Quarter Car Model, Automotive Suspension, Fuzzy Logic Controller.

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R. Anbalagan ¹, J. Jancirani ²

Affiliations
1 Automobile Engg. Dept., Rajalakshmi Engineering College, Chennai, IN
2 Mech. Engg. Dept., Anna University, Chennai, IN

Abstract

This paper presents experimental investigation of braking performance of vacuum brake system for light commercial vehicles. The vacuum brake system uses a compressor for creating vacuum and requires less driver effort compared to the conventional brake system. In this work various components of vacuum brake system are designed and fabricated and then installed in Maruti Omni vehicle for performance testing. The stopping distance, braking force and braking efficiency are analysed for vacuum brake system.

Keywords

Vacuum Brake System, Light Commercial Vehicle, Compressor, Stopping Distance, Brake Efficiency.

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