The results of the simulation show that , compared to the passive suspension system , the active suspension systems effectively suppress the vibration of vehicle in the range of frequencies sensitive of human body , greatly improve the ride comfort and have strong robustness . hence , it provides some valuable theoretic reference for the research of vehicle active suspension control 仿真结果表明,与被动悬架系统相比,主动悬架系统有效地抑制了人体敏感频率范围内的汽车振动,大大改善了汽车的行驶平顺性,且具有较强的鲁棒性,从而为汽车主动悬架控制的进一步研究提供了有价值的理论参考。
The controller of magnetorheological semi - active suspension system was consisted of drive current control subsystem of magnetorheological damper and mechanical structural fuzzy control subsystem of vehicle , the unsymmetry damping force relation of suspension compress travel and promote travel is solved with coefficient of language - value of damper force output variable 由汽车结构振动模糊控制子系统和磁流变阻尼器驱动电流控制子系统构建了磁流变半主动悬架控制器,用模糊集语言赋值系数反映了悬架伸张行程和压缩行程不对称阻尼控制力的关系。
Semi - active suspension system is consist of the traditional springs and controllable dampers , which has lower cost compared to the actuator in active suspension system , with suitable damping control strategy . it can attain to the performances which is nearly to active suspension system , with little consume of energy , this is the reason that the semi - active suspension system has attraction 车辆半主动悬挂系统是由弹性元件、成本低于主动悬挂作动器的可控阻尼器、加上适用的阻尼控制规律构成的,能够在只消耗少量能源的情况下,达到与主动控制相近的性能,这是半主动悬挂具有吸引力的原因所在。
So we consider applying integrated optimization on the design of a vehicle semi - active suspension system . because traditional design method of vehicle semi - active suspension system always design control parameters following structure parameters and it can not obtain the global optimum performances for the system , this paper presents the method to integrate the structure and control parameters of the semi - active suspension system 对于这种新的优化方法,本文将其应用于汽车半主动悬架的设计上,针对传统半主动悬架先设计其结构参数后设计其控制器,这样易造成系统失去全局最优性能的特点,对汽车半主动悬架系统提出对其结构参数和控制参数进行集成优化的方法。
Several semi - active control algorithms used in the semi - active suspension system with mr dampers are proposed and developed including the " on - off " voltage controller , the continuously linear variable voltage controller , the modulated continuously linear variable voltage controller based on " sky - hook " damping concept and the hybrid controller based on the combination of " sky - hook " damping concept and " ground - hook " damping concept and the fuzzy logic controllers using measurements of the relative displacement between the sprung and unsprung mass or the absolute acceleration of the sprung mass as the input variables of fuzzy logic controllers . the simulation models were prepared in matlab ? simulink ? fuzzy toolbox programs . the experiment setup of the semi - active suspension system with mr dampers in the lab has been designed and developed 根据磁流变阻尼器特性和对悬架系统动力学特性的规律性研究,为磁流变阻尼器设计了基于“天棚”阻尼控制概念的“ on - off ” 、线性连续和修正的线性连续控制策略,基于“地棚”阻尼控制概念的磁流变阻尼线性连续控制策略, “天棚”阻尼和“地棚”阻尼控制概念线性组合起来的磁流变阻尼混合控制策略,根据模糊控制原理设计了以簧载质量和非簧载质量间相对位移或簧载质量加速度分别作为输入变量的模糊逻辑控制器用于磁流变阻尼半主动悬架的智能控制。
Considering the uncertain factors of the suspension system of a vehicle that are from the environment disturb as vehicle running , we bring forward t wo methods to integrate semi - active suspension system in this paper . one is the integrated optimization based on genetic algorithm and lqg control , the other is the integrated optimization based on genetic algorithm and h control 考虑到汽车行驶时具有复杂的外界干扰,使得半主动悬架系统具有很大的不确定性,分别采用遗传算法和lqg控制的集成优化方法,遗传算法和h _控制的集成优化方法,对汽车半主动悬架系统进行仿真和试验研究。