CAJ | 학술논문

以车辆子系统间耦合关系为出发点，基于状态空间理论提出了以子系统耦合系数和相对衰减系数为考察指标的车辆子系统振动传递特性研究方法。采用拉丁超立方设计分析了悬置参数对系统耦合程度的影响，研究了耦合和子系统振动衰减的关系；采用非支配序列遗传算法进行了多目标优化并获取了最优解集，并结合子系统传递函数来验证结果。研究结果表明，以相对衰减系数最小化为目标，综合考虑发动机底盘和车身底盘子系统的耦合关系可有效改善车辆平顺性。
이차량자계통간우합관계위출발점，기우상태공간이론제출료이자계통우합계수화상대쇠감계수위고찰지표적차량자계통진동전체특성연구방법。채용랍정초립방설계분석료현치삼수대계통우합정도적영향，연구료우합화자계통진동쇠감적관계；채용비지배서렬유전산법진행료다목표우화병획취료최우해집，병결합자계통전체함수래험증결과。연구결과표명，이상대쇠감계수최소화위목표，종합고필발동궤저반화차신저반자계통적우합관계가유효개선차량평순성。
This paper presented a study of a mechanics model of coupled vibration system with e-lastic supports based on state space theory,with subsystem coupling coefficient and relative attenuate coefficient to evaluate the transfer characteristics.Parameter study was taken using Latin hypercube sampling,and relationships among mount parameters and system coupling characteristics was dis-cussed.Non-dominated sorting genetic algorithm was adopted to solve the multi-objective optimiza-tion problem and optimal solution set was obtained for vehicle coupling system,which was validated by transfer functions of subsystems.The results show that improvements of coupling characteristics of both engine/chassis and body/chassis subsystems in engine-chassis-body system can help optimize ride comfort quality of vehicles,and the method of optimization calculation to minimize relative atten-uate coefficients is feasible.