Study On Structural Design And Impact Resistance Of New Type Electrorheological Damper

In many machinery and construction systems, the high impact load widely exists. Because of the short time and huge force, the impact load can easily bring the equipments and constructions to vibrate, fatigue, even invalidation. Due to the characters of low power requirement, rapid-response and large force, the ER damper have shown to be one kind of ideal impact absorber. In this dissertation, A new ER damper is applied as the shock absorber under impact load. And to have good performance in this application, not only the structure and parameters of new ER damper piston but also the control algorithm are researched. ER damper is designed with simple structure, controllable damping force and excellent mechanical and electrical coupling characteristics. As to the ER damper is applied as the shock absorber under the impact load, the following researches are done in this dissertation.(1) Based on the analysis of damper force under the impact load and the old ER damper using the impact test, the new type of long stroke fixed plate type current ER damper was designed. And the mechanical formula based on Bingham model was derived. Determining the dimension parameters of key components and choosing the right parts material for the New type of variable damper.(2) The nonlinearity, stability and controllability of the ER damper buffer system were analyzed and verified; the platform effect was put forward as the control target of system. The control model of the ER damper buffer system based on Simulink was established, which the core of model is fixed voltage control, PID control and fuzzy control respectively, and the algorithms were simulated.(3) The impact test platform based on dSAPCE semi-physical simulation system was set up, which test platform is used to simulate the impact load. To realize the Rapid Control Prototyping of the buffer system, fixed voltage control, PID control and fuzzy control are adopted respectively. And the buffer damping effect of the ER damper was studied. The test results show that the fuzzy control algorithm has the best control effect, which are consistent with the simulation results.