Sliding mode control of a shear-mode type ER engine mount

This paper presents feedback control characteristics of a shear-mode type e lectro-rheological (ER) engine mount. The field-dependent yield stress of a n arabic gum-based ER fluid is obtained using a couette type electroviscome ter, and it is incorporated into the governing equation of motion of the ER engine mount, which is derived from a bond graph model. A sliding mode con troller which directly represents the field-dependent damping force is form ulated by taking into account the stiffness and damping properties of the s ystem as parameter uncertainties. The controller is then experimentally rea lized by imposing a semi-active actuating condition. The effectiveness of t he proposed ER engine mount is demonstrated showing capabilities of isolati ng the vibrations due to sinusoidal and random excitations.