Papers by Dr. Devdutt Singh
International Journal of Dynamics and Control, 2018
The objective of this paper is to improve the passenger ride comfort and safety in an active quar... more The objective of this paper is to improve the passenger ride comfort and safety in an active quarter car model. For this purpose, a quarter car model with passenger body is considered to capture the dynamic behaviour of a real car system. To achieve the desired target, three different controllers such as ANFIS controller, Hybrid ANFIS PID controller (HANFISPID) and Hybrid ANFIS PID Controller with Coupled Rules (HANFISPIDCR) are designed. The random road excitation is designed as per ISO 8608 standard. The parameters selected for active quarter car model performance evaluation and comparison under random road excitation are in terms of acceleration and displacement response of passenger body. The influence of road induced vibrations on the passenger body is also investigated using ISO 2631-1 standard. The performance of designed controllers are evaluated using simulation work in time and frequency domain.Simulation results show that the proposed HANFISPIDCR control scheme can successfully improve the desired performance compared to passive and other controlled cases in an active quarter car model.
The development of vehicles having best ride comfort and safety of travelling passengers is of gr... more The development of vehicles having best ride comfort and safety of travelling passengers is of great interest for automotive manufacturers. The effect of transmitted vibrations from car body to passenger seat is required to be controlled for achieving the same. The application of magneto-rheological (MR) shock absorber in suspension system has been considered to achieve significant benefits in this regard. This paper introduces a secondary suspension controlled semi-active quarter car system using MR shock absorber for effective vibration control. Fuzzy logic control system is used for design of controller for actual damping force generation by MR shock absorber. Performance evaluations are done related to passenger seat acceleration and displacement in time and frequency domains, in order to see the effectiveness of the proposed semi-active suspension system. Simulation results show that the semi-active suspension system provides better results compared to passive suspension system...
International Journal of Recent advances in Mechanical Engineering, 2014
In this paper, different semi-active control strategies for non-linear quarter car model equipped... more In this paper, different semi-active control strategies for non-linear quarter car model equipped with controllable magneto-rheological (MR) shock absorbers and fuzzy logic controller are compared. Polynomial model is selected to characterize the experimental results of MR shock absorber. A combination of Forward Fuzzy Logic Controller (FFLC) and Inverse Fuzzy Logic Controller (IFLC) is designed for proper working of MR shock absorber i.e. generation and supply of control current to MR shock absorber, which provides damping force to suspension system for vibration control purpose. Simulink responses of four different cases are evaluated for passenger ride comfort analysis taking uncontrolled, primary suspension controlled, secondary suspension controlled and fully controlled quarter car models. The obtained results in graphical and mathematical form demonstrate that the fully controlled quarter car system provides excellent performance in suppression of passenger seat vibrations compared to other control strategies while the vehicle travels over the sinusoidal type of input road profile.
Passenger seat vibration control of a semi-active quarter car system with hybrid Fuzzy–PID approach
International Journal of Dynamics and Control, 2015
In this paper, semi-active quarter car system with three degrees of freedom is considered for mod... more In this paper, semi-active quarter car system with three degrees of freedom is considered for modeling and evaluation of passenger ride comfort. Experimental results of magneto-rheological shock absorber are modeled using polynomial model. The considered algorithms in semi-active quarter car suspension system include PID controller, fuzzy logic controller, hybrid fuzzy–PID controller and hybrid fuzzy–PID controller with coupled rules. Simulation responses of the controlled semi-active and uncontrolled quarter car systems are compared under bump type of road excitation in time domain. Simulation results demonstrate that the semi-active suspension system having hybrid fuzzy–PID controller with coupled rules provide best performance in controlling the passenger seat acceleration and displacement response compared to uncontrolled and other controlled cases.
This paper presents an investigation into the effectiveness of controllable magnetorheological (M... more This paper presents an investigation into the effectiveness of controllable magnetorheological (MR) damper for a semi-acive vehicle model with passenger seat. Mathematical model has been experimentally developed for controller design using Choi et al. model. A quarter vehicle model has been employed for system performance evaluation via Matlab through numerical simulation. System behaviour related to passenger comfort and safety has been analysed without and with fuzzy logic control strategy in suspension system for passenger comfort and safety during on road varying driving conditions.
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Papers by Dr. Devdutt Singh