The force control system design of road simulator using QFT

This paper presents the force control system design of road simulator for reproducing the random input signal to implement the real road vibration´s data. The force control system using quantitative feedback theory controls the road simulator effectively. The force control system illustrates a tracking performance of the closed-loop controller with low order transfer function G(s) and pre-filter F(s) having the minimum bandwidth for parameters of uncertain plant. A force controller is designed to communicate the control signal between 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 uncertain hydraulic plant system. The Labview software is used to make up for the real controller in the real-time basis. The experimental results show that the proposed algorithm works well for the road simulator. The road simulator consists of the specimen, hydraulic pump, servo valve, hydraulic actuator and its control equipments.