Evaluation of the Real time Control of Magneto Rheological Dampers Subject to Impact Load

摘要

In recoil mechanisms applications, the adjustability of Magneto rheological (MR) dampers is desired to be used in closed loop control system to provide the optimal damping force and the recoil dynamics can be controlled.In this paper, the damping control system of MR dampers subject to impact load is examined. Dynamic response time is an important characteristic for determining the performance of MR dampers' control system in recoil mechanisms applications, since the recoil cycle is very fast, about only several hundreds milliseconds. First,impact test is done to evaluate the response time of the special designed long stroke MR damper corresponding to the step signal of the operating current. It's followed that the control circuit is examined and simplified nonlinear model of the damping control system is developed. Since the response time of the original nonlinear control system tested above can not mesh with the application demands,approaches and algorithms to optimize the dynamic response is investigated. Finally, the numerical simulation verification is provided. It's indeed possible that the adjustability of MR dampers can be used with good control method in a closed-loop system to achieve the optimal recoil dynamics.