CAJ | 학술논문

时滞导致磁流变减振器可控阻尼力的不同步,降低了车辆半主动悬架的性能及其稳定性,因此时滞问题是近年来半主动悬架的研究热点之一.基于RD-1005-3磁流变减振器的响应特性,在半主动悬架临界时滞理论分析的基础上,建立含有时滞的磁流变半主动悬架的数学模型与传递函数,分析时滞对悬架幅频特性的影响:通过对临界时滞数值解的分析,为磁流变半主动悬架控制系统的时滞研究提供理论依据.在模糊控制策略的基础上,运用Smith预估补偿控制对系统进行时滞补偿,并在Matlab中进行仿真分析.对搭建的单质量磁流变半主动悬架系统进行台架试验,仿真和试验数据均表明进行时滞补偿的系统很好地改善了悬架性能.
시체도치자류변감진기가공조니력적불동보,강저료차량반주동현가적성능급기은정성,인차시체문제시근년래반주동현가적연구열점지일.기우RD-1005-3자류변감진기적향응특성,재반주동현가림계시체이론분석적기출상,건립함유시체적자류변반주동현가적수학모형여전체함수,분석시체대현가폭빈특성적영향:통과대림계시체수치해적분석,위자류변반주동현가공제계통적시체연구제공이론의거.재모호공제책략적기출상,운용Smith예고보상공제대계통진행시체보상,병재Matlab중진행방진분석.대탑건적단질량자류변반주동현가계통진행태가시험,방진화시험수거균표명진행시체보상적계통흔호지개선료현가성능.
Time delay causes unsynchronized controllable damping force of magnetorheological damper, which degrades the performance and stability of vehicle semi-active suspension, therefore time-delay problem is one of the hot spots of research on semi-active suspension. Based on the response characteristics of RD-1005-3 magnetorheological damper and the theoretical analysis of critical time delay of semi-active suspension, the mathematical model and the transfer function of magnetorheological semi-active suspension with time delay are established, and the effect of time delay on the amplitude frequency characteristics of suspension is analyzed. Through analyzing the numerical solution of critical time delay, theoretical basis is provided for the research on time-delay of control system of magnetorheological semi-active suspension. Based on fuzzy control strategy, Smith forecasting compensation control is used to carry out compensation of time delay for the system, and simulation analysis is carded out in Matlab. Bench test is carried out for the built single mass magnetorheological semi-active suspension system, and the data of simulation and test show that the time delay compensated system improves the performance of suspensions well.