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International Journal of Automotive Technology 2008;9(1): 37-43. |
| DESIGN OF A FORCED CONTROL SYSTEM FOR A DYNAMIC ROAD SIMULATOR USING QFT |
| J. W. KIM, D.-J. XUAN, Y.-B. KIM |
| Chonnam National University |
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| ABSTRACT |
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This paper presents the road simulator control technology for reproducing a road input signal to implement real road data. The simulator consists of a hydraulic pump, a servo valve, a hydraulic actuator and its control equipment. QFT (Quantitative Control Theory) is utilized to control the simulator effectively. The control system illustrates a tracking performance of the closed-loop controller with a low order transfer function G(s) and a pre-filter F(s) for a parametric uncertainty model. A force controller is designed to communicate the control signal between the simulator and digital controller. Tracking specification is satisfied with upper and lower bound tolerances on the steep response of the system to the reference signal. The efficacy of the QFT force controller is verified through the numerical simulation in which combined dynamics and actuation of the hydraulic servo system are tested. The simulation results show that the proposed control technique works well under an uncertain hydraulic plant system. The conventional software (Labview) is used to make up for the real controller on a real-time basis, and the experimental works show that the proposed algorithm works well for a single road simulator. |
| Key Words:
QFT, Dynamic road simulator, Uncertain plant, Hydraulic servo cylinder, Robust control, Force control system |
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