Abstract
Performance characteristics of a semi-active ER (electro-rheological) suspension system are evaluated through the field test of a passenger car. Four ER shock absorbers are designed and manufactured for both front and rear parts, and their field-dependent damping properties are investigated. Subsequently, four independent skyhook controllers associated with ER shock absorbers are formulated by considering the vertical motions of the body and wheel of the car to be tested. Both ride comfort and steering stability of the car are evaluated via the field test showing bump and squat test responses.
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