MR damper’s modeling based on improved dual-sigmoid model
PENG Hu1, ZHANG Jinqiu2, LIU Yile2, ZHANG Jian2, PENG Zhizhao2, SUN Yiquan2
1. Department of Equipment Support and Remanufacture, Army Academy of Armored Forces, Beijing, 100072, China;
2. Department of Vehicle Engineering, Army Academy of Armored Forces, Beijing, 100072, China
Abstract：A magneto-rheological (MR) damper was designed and its performance tests were conducted.Aiming at problems of the dual-sigmoid model (DSM) to describe MR damper’s dynamic performance being not able to reflect the relation between damping force and displacement and consider the stiffness of energy accumulator and the influence of bias force, an improved dual-sigmoid model (IDSM) for MR damper’s dynamic performance was proposed.Several key points of IDSM including definitions of model parameters, relations among parameters, current and velocity, and identification of parameters, etc.were analyzed, and the correctness of the model was verified with the standard deviation.The results indicated that the IDSM has a higher degree of fit with test values regardless of low velocity or high one and small current or large one; when the maximum velocity is 0.52 m/s, the relative error is only 1.71%; IDSM has advantages of few parameters, good accuracy and easy to realize, it is suitable for engineering fields.
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