CAJ | 학술논문

为更好地权衡车辆的操纵稳定性和行驶平顺性,建立了一种模糊阻抗液压主动悬架的控制策略。通过建立的1/4车辆主动悬架模型和液压作动器模型,设计了带有位置闭环、力闭环的阻抗控制器,阻抗控制跟踪车轮动载荷,位置闭环采用模糊控制以跟踪由阻抗控制确定的车身期望垂直位置,力闭环采用比例积分( PI)控制以追踪控制器的期望力,同时分析了阻抗参数与车辆行驶平顺性和操纵稳定性之间的关系。利用Matlab20116/Simulink搭建了带有0.1 m 高凸起的B级路面输入及液压主动悬架系统模型,仿真结果表明,相对于被动悬架,液压主动悬架的车身垂直加速度、悬架动挠度及车轮动位移分别下降了39.97%,49.46%和23.63%,该控制策略能有效提高车辆的行驶平顺性和操纵稳定性。
위경호지권형차량적조종은정성화행사평순성,건립료일충모호조항액압주동현가적공제책략。통과건립적1/4차량주동현가모형화액압작동기모형,설계료대유위치폐배、력폐배적조항공제기,조항공제근종차륜동재하,위치폐배채용모호공제이근종유조항공제학정적차신기망수직위치,력폐배채용비례적분( PI)공제이추종공제기적기망력,동시분석료조항삼수여차량행사평순성화조종은정성지간적관계。이용Matlab20116/Simulink탑건료대유0.1 m 고철기적B급로면수입급액압주동현가계통모형,방진결과표명,상대우피동현가,액압주동현가적차신수직가속도、현가동뇨도급차륜동위이분별하강료39.97%,49.46%화23.63%,해공제책략능유효제고차량적행사평순성화조종은정성。
This paper discussed the design of a fuzzy-impedance control technique applied to a quar-ter vehicle model with active suspension operated by a hydraulic actuator to preserve a trade off be-tween vehicle handling stability and passenger comfort. An impedance controller with position closed loop and force closed loop was designed. The impedance controller tracks the tire force from road, the position loop employs fuzzy logic control to track a desired body displacement given by the im-pedance control, and the force loop uses proportional integral ( PI) control to track a desired force given by the position loop. A relation between the ride comfort and handling stability and the imped-ance parameters was discussed. By using Matlab2011b /Simulink, a vehicle model of suspension system to B road with 0. 1 m disturbances was simulated. The results showed that root mean square values (RMS) of body acceleration, suspension dynamic deflection and tire dynamic travel of the active suspension system, compared to the passive suspension, were reduced 39. 97%,49. 46% and 23. 63% respectively. It is showed that ride comfort and handling stability were greatly improved.