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International Journal of Automotive Technology > Volume 19(6); 2018 > Article
International Journal of Automotive Technology 2018;19(6): 1001-1012.
DEVELOPMENT OF PREVIEW ACTIVE SUSPENSION CONTROL SYSTEM AND PERFORMANCE LIMIT ANALYSIS BY TRAJECTORY OPTIMIZATION
Minwoo Soh1, Hyeongjun Jang1, Jaehyung Park2, Youngil Sohn2, Kihong Park1
1Kookmin University
2Hyundai Motor Company
PDF Links Corresponding Author.  Kihong Park , Email. kpark@kookmin.ac.kr
ABSTRACT
The main role of the suspension system is to achieve ride comfort by reducing vibrations generated by the road roughness. The active damper is getting much attention due to its reduced cost and ability to enhance ride comfort especially when the road ahead is measurable by an environment sensor. In this study a preview active suspension control system was developed in order to improve ride comfort when the vehicle is passing over a speed bump. The control system consists of a feedback controller based on the skyhook logic and a feedforward controller for canceling out the road disturbance. The performance limit for the active suspension control system was computed via trajectory optimization to provide a measure against which to compare and validate the performance of the developed controller. The simulation results indicated that the controller of this study could enhance ride comfort significantly over the active suspension control system employing only the skyhook feedback control logic. Also the developed controller, by displaying similar control pattern as the trajectory optimization during significant time portions, proved that its control policy is legitimate.
Key Words: Active suspension control system, Active damper, Trajectory optimization, Performance limit, Skyhook control
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