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Different optimization criteria for vehicle seat suspension control: Position versus acceleration

Hashemnia, S ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1115/DETC2009-86732
  3. Publisher: 2010
  4. Abstract:
  5. This paper addresses the effect of different optimization criteria for the control purpose of vehicle suspension. In the present study, active vibration control system for a 5 degree-of-freedom (DoF) pitch-plane suspension model with bounce and pitch motions is investigated. In the proposed vehicle model, the impact of the wheel-axle-brake assemblies' masses is also considered. The developed model is controlled using a fuzzy logic controller (FLC) to minimize the vibration of the driver's seat. The controller is designed to control the applied force to the seat. Furthermore, in order to determine the optimal value of fuzzy system parameters, genetic algorithm (GA) optimization search is used based on minimizing both vibrations and accelerations of the driver's seat. In other words, two different criteria are chosen for optimization of the controller: minimizing either absolute displacement or absolute acceleration which is related to ride comfort. In each case, the simulation is implemented and the results are presented. It is shown that optimization according to only one criterion may lead to undesirable results in other system parameters. In addition, it is demonstrated that considering absolute displacement as the only factor to be minimized is ineffective. Finally, another criterion which is a combination of the two previous criteria has been suggested and tested and the obtained results are presented. The combinational criterion can suppress the vibration as well as decreasing the vehicle acceleration
  6. Keywords:
  7. Absolute displacement ; Active vibration control systems ; Applied forces ; Brake assemblies ; Control purpose ; Developed model ; Fuzzy logic controllers ; Genetic-algorithm optimizations ; Optimal values ; Optimization criteria ; Pitch motion ; Ride comforts ; Seat suspension ; Vehicle acceleration ; Vehicle model ; Aircraft seats ; Automobile parts and equipment ; Automobile suspensions ; Controllers ; Flight control systems ; Fuzzy control ; Fuzzy logic ; Fuzzy sets ; Genetic algorithms ; Vehicle suspensions ; Vehicles ; Wheels ; Optimization
  8. Source: Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference 2009, DETC2009, 30 August 2009 through 2 September 2009 ; Volume 6 , August–September , 2010 , Pages 1053-1059 ; 9780791849033 (ISBN)
  9. URL: http://proceedings.asmedigitalcollection.asme.org/mobile/proceeding.aspx?articleid=1650268