The key parts of semi - active suspension system are hydraulic dampers capable of adjusting damping force in accordance with driving conditions . on the base of it , the paper designs moveable valve adjustable dampers . its structure simple , the control is effective 半主动悬架系统的关键部件是适应车辆行驶变化的阻尼力可调的液力减震器,鉴于此,本文设计了一种电磁阀控制的两态可调减震器,其结构简单,控制有效。
These factors include the nonlinearity of suspension spring , the nonlinearity of damping force and the nonlinearity of driving force , etc , in which suspension spring and damping force are main factors that influence the distortion of ultra - low - frequency vibrator 影响振动台台面波形失真的因素有：乳胶管弹簧的非线性、阻尼力的非线性、驱动力的非线性等，其中，弹簧和阻尼力的非线性是影响振动台超低频失真度的主要因素。
After deriving the governing equation of motion of these dampers and the theoretical model , we simulated the damping force of the dampers under different electric field strength conditions , and used an electrical hydraulic servo dynamic testing system to test flow mode er damper and mixed mode er damper 在不同电场下，模拟阻尼器的阻尼力特性，并使用电液伺服动态测试系统测试流动模式电流变液阻尼器及混合模式电流变液阻尼器。
Compared with the passive car suspension , the semi - active car suspension system with the intelligent mr damper can control the damping force automatically with the computer control and then enhance the ride comfort and handling stability of the car effectively 与传统的汽车被动悬架系统相比,装有磁流变阻尼器的半主动悬架系统,可以根据路面状况和车辆运行状态,在计算机的控制下自动调节阻尼力,大大提高了汽车乘坐的舒适性和行驶安全性。
Semi - active suspension is composed of controllable spring and damper element which consume little energy and are easy to design and manufacture . because semi - active suspension can improve ride comfort so automobile researchs are enthusiastic are about the research into the semi - active suspension 由弹性元件和阻尼力可控减振器组成的半主动悬架有能耗小，易实现等优点，可以改善汽车行驶的平顺性，所以半主动悬架已成为汽车领域研究的一个热门课题。
This part chooses the third kind of plan and designs its structure , and research the armature piston model mr damper ' s functions , and analyze the effects to damping force by various materials of mrf , various dimension of geometric and various input electric current 对所设计的电枢活塞式磁流变阻尼器进行了性能研究，分析了不同的磁流变液材料、不同的几何尺寸、不同的输入电流对阻尼力的影响，并进行了比较，指出了磁流变阻尼器设计中应重点注意的一些问题。
Based on the special property of magnetic fluid ( mf ) , we fill the magnetic fluid into the working clearances of the servo valve torque motor . one side , the magnetized magnetic fluid can exert a damping torque on the torque motor armature and reduce vibration of the armature ; on the other side , it can improve the magnetic circuit efficiency of the torque motor because of the magnetic fluid ’ s larger magnetic permeability 基于磁流体所具有的特殊性质,将磁流体添加到伺服阀力矩马达的工作间隙中,一方面磁流体被磁化后可增大衔铁的阻尼力,减少振动;另一方面由于力矩马达气隙中磁导率的提高,使气隙中的磁通量增大,力矩马达的磁路效率和输出扭矩将增大,因此可以提高力矩马达的固有频率和伺服阀的响应速度。
Simulation results show that the method is very simple to application and has also a good precision . non - parameter neural network model of the cable - damper system is formatted . based on the damping force and responses for past time steps , responses at the next time step can be predicted accurately with the non - parameter model 3 、应用神经网络技术对参数识别和非参数化建模问题进行了研究，提出一种直接识别结构物理参数的神经网络识别方法，该方法算法简单，识别精度高；建立了拉索-阻尼器系统的非参数神经网络模型，该模型根据过去几个时间步的阻尼力及结构响应能精确预测下一时间步的响应。
Vehicle damper using er fluid can produce continuous and controllable damping forces for vehicle ' s best ride comfort and road holding , so many scientist focus on it . today ' s researches are on control features on condition that vehicle ' s passive damper is replaced by er damper operated by external energy source 使用电流变流体作为工作介质的车用减振器可以在电场的作用下，产生连续可控的阻尼力以实现车辆良好的乘座平顺性和操作稳定性，是电流变技术应用中的一个研究热点。
Vehicle damper using er fluid can produce continuous and controllable damping forces for vehicle ' s best ride comfort and road holding , so many scientist focus on it . today ' s researches are on control features on condition that vehicle ' s passive damper is replaced by er damper operated by external energy source 使用电流变流体作为工作介质的轨道车辆减振器可以在电场的作用下，产生连续可控的阻尼力以实现轨道车辆良好的乘坐舒适性和操纵平稳性，是电流变技术应用中的一个研究热点。
