In order to reduce the costs of sensors and to improve the reliability of the magnetorheological(MR) semi-active suspension system,a novel structure for MR shock absorber with asymmetric damping force and the corresponding control strategy were put forward herein.On the basis of the design structures,the output damping of the MR shock absorber was analytically derived.A shock absorber was fabricated and tested under different sinusoidal excitations.A quarter car's model was developed to analyze the control ...