반능동 현가시스템 제어를 적용한 작업용 차량의 응답 특성 분석

This paper presents a response characteristic analysis of utility vehicle with semi-active suspension system to improve passenger ride comfort. A quarter car model for the vehicle is formulated as state space matrix and its semi-active suspension system is controlled by implementing a skyhook controller and a Linear Quadratic Regulator (LQR). When the vehicle driving a simple bump at constant speed, their results of time domain are shown and their property for the controllers is analyzed. The paper also shows Power spectral density (PSD), frequency results of vertical acceleration, suspension deflection and tire deflection, using an uneven road profile. This simulator is developed as MATLAB/Simulink.