径向流磁流变阀动态性能及阀控缸系统阻尼特性研究

针对目前磁流变阀输出压降较小的缺点，设计了一种可有效提高压降的径向流磁流变阀，分析了其工作原理及压降数学模型.搭建性能测试实验台对不同加载电流及不同流量下的径向流磁流变阀压降及响应性能进行试验分析；同时对磁流变阀控缸系统进行了阻尼特性分析，分别测定了不同电流、频率及振幅下的动力性能.结果表明，以径向流磁流变阀为核心元件的阀控缸系统能够输出较大阻尼力，最大阻尼力达5 kN；系统响应迅速，电流1.2 A时压降可达3.2 MPa，响应时间在100~150 ms之间.输出阻尼力连续可调，同时输出阻尼力受活塞杆运动速度影响很小，阀控缸系统能在各种工况输出稳定阻尼力. 

Dynamic Performance of Radial Flow Magneto-Rheological Valve and Damping Performances of Valve-Controlled Cylinder System

In order to improve the pressure drop ability of the magneto-rheological (MR) valve, a radial flow MR valve with higher pressure drop ability was proposed. Firstly, the working principle was analyzed in detail and a mathematical model of radial flow MR valve was established. And then, a dynamic test system was constructed to test the pressure drop and response time of the radial flow MR valve under different applied direct currents and flow rates. The experimental results show that the pressure drop is 3.2 MPa at the applied direct current of 1.2 A, and the response time is between 100 ms and 150 ms. Finally, the damping performances of the radial flow MR valve-controlled cylinder system were analyzed. The damping performance tests were carried out under different applied direct currents, frequencies, and amplitudes. The experimental results show that, the system can output a larger damping force, and the maximum damping force can reach 5 kN. Furthermore, the damping force can be continuously adjusted under the different applied direct current, and the adjustable range is wider too. The effects of piston velocity on the damping force are little, and the system can generate stable damping forces in a variety of operating conditions.