Hybrid variable structure-fuzzy control of a magnetorheological damper for a seat suspension Online publication date: Fri, 06-May-2005
by Emanuele Guglielmino, Charles W. Stammers, Danut Stancioiu, Tudor Sireteanu, Rinaldo Ghigliazza
International Journal of Vehicle Autonomous Systems (IJVAS), Vol. 3, No. 1, 2005
Abstract: The paper concerns an investigation of the use of a controlled magnetorheological damper for a semi-active seat suspension in vehicles not equipped with primary suspensions (e.g. some types of agricultural, forestry and roadwork vehicles). A magnetorheological damper can produce a variable damping action without requiring moving parts, such as valves, as opposed to a more conventional controlled damper. This paper presents a control strategy targeted to improve driver comfort based on a hybrid variable structure-fuzzy logic controller. Variable structure control is inherently a switching logic, hence more prone to cause chattering. Fuzzy logic helps reduce chatter without penalising damper dynamic response. An experimentally validated model of a magnetorheological damper which also includes hysteresis, and a vibration model of the human body have been developed and the system performance investigated via numerical simulation.
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