Control polices with semi-active and active devices such as magnetorheological (MR) damper, magnetorheological isolator, magnetorheological mount, electrorheological dampers, actuators and pneumatics are integrated with automotive seating system (ASS) for seating and ride comfort. Semi-active device has been developed to replace the traditional static spring and damper system for reducing the acceleration of the human body. The current work reviews various control policies like PID, GA-PID, PSO-PID, MR on–off, FLC, Skyhook, etc., used for controlling the vibration level of ASS. This review study finds that adoption of cost effective intelligent vibration control policies with adoptive solutions will improve the ride comfort and will be made available in all ASS in the near future. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

Ramalingam C

Department of Biotechnology

School of Bio Sciences and Technology

Vellore Campus

Davidson Jebaseelan

Mechanical

School of Mechanical Engineering

Chennai Campus

Patel R

Thirumurugan M.A

Jebaraj C.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

International Journal of Dynamics and Control

Integration of semi-active devices in Automotive Seating System (ASS) with intelligent control policies help attenuation of the vibration transmitted to the occupant. The current work investigates the effectiveness of a semi-active magnetorheological (MR) damper with ASS for a quarter car model with the application of suitable control algorithms. The system controller calculates the desired damping force using proportional integral derivative (PID), skyhook on/off, PID tuned using genetic algorithm (GA), skyhook continuous and modified skyhook controllers. The signum function damper controller estimates the command voltage required for tracking the desired damping force. The displacement and acceleration of the passive seat system was compared with the semi-active seat suspension system in time and frequency domains. The results from the frequency domain shows that the lowest resonance peaks for the seat system can be achieved using the modified skyhook control policy. The effectiveness of the modified skyhook controller is evaluated in terms of peak to peak (PTP) acceleration, root mean square (RMS) acceleration, frequency weighted RMS acceleration, seat effective amplitude transmissibility (SEAT), vibration dose value (VDV) and crest factor (CF) for enhancing the ride quality. The modified skyhook controller can dissipate the energy better than the passive system. The modified skyhook controller increased the occupant ride quality of SEAT, VDV and CF by 30.41%, 52.84% and 11.62% on account of small bump excitation and 31.76%, 53.27% and 11.02% on account of large bump excitation compared with passive system. The modified skyhook control policy attenuates the vibration better than other control policies addressed in this paper. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

Response characteristics of car seat suspension using intelligent control policies under small and large bump excitations

The Automotive Seating System (ASS) is an important sub-system in a car for increasing the ride comfort of driver/occupant and hence the need for a systematic study on the vibration characteristics of ASS is of importance. The present study finds out the vibration characteristics of four models of automotive seating system, with and without dummy mass using finite element analysis. The vibration mode shapes such as lateral, fore-aft and twisting of automotive seating system found in the frequency range 0-80 Hz for the four models of automotive seating system and correlated with experimental results found in the literature. The natural frequency of the seat with dummy mass was found to be in the human discomfort zone of the spinal column (10–12 Hz) and abdomen (4–8 Hz). The vibration transfer to occupant body was studied at 11 positions, with unit acceleration given at four mounting locations of automotive seating system in three directions separately. The vibration transmissibility was found to be higher than one in seat backrest. The random vibration analysis was carried out to identify the acceleration level of automotive seating system, subjected to smooth and rough road excitations. In the case of rough road random excitations, the results of root mean square acceleration values in automotive seating system show that the driver/passenger feels “fairly comfortable”. This study emphasizes the importance of the ride comfort of driver/occupant. To enhance the ride comfort, the stiffness of seat structure has to be modified and suspension system has to be introduced.

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science

The effect of vibration characteristics of an automotive seating system on ride comfort – A finite element study

Modeling and control of passenger body vibrations in active quarter car system: a hybrid ANFIS PID approach

Journal of Vibration and Control

The control of an active seat with vehicle suspension preview information

Journal of Intelligent Material Systems and Structures

Integrated active and semi-active control for seat suspension of a heavy duty vehicle

A new adaptive hybrid controller for vibration control of a vehicle seat suspension featuring MR damper

Applied Sciences

A Novel Adaptive PID Controller with Application to Vibration Control of a Semi-Active Vehicle Seat Suspension

Control policies used for semi-active damper for automotive seating system: a review

Journal	Data powered by TypesetInternational Journal of Dynamics and Control
Publisher	Data powered by TypesetSpringer Science and Business Media LLC
ISSN	2195-268X
Open Access	0