Comparison of different active suspension control strategies using half car model

Büyüker, Banu Çiçek
Among other advances in ground vehicle technology, active suspension systems play an important role in improving ride comfort, handling and road holding vehicles. Ride comfort is affected by vehicle motions, such as body bounce, pitch and roll, but also limiting wheel travel and suspension deflection is important for road holding performance. The main motivation of this study is designing different control strategies for active suspension systems equipped with a linear electric motor and making a comprehensive assessment of active suspension systems by comparing these control methods. To achieve this aim, initially, characteristics of linear actuators are reviewed, and a linearized half-car model is obtained with four degrees of freedom. Then in order to compensate the effects of the road profile on ride comfort, PID, LQR, H∞ and sliding mode controllers are developed. Genetic and gradient-based optimization algorithms are used. Simulations are carried out, and bounce, pitch, wheel travel and suspension deflection of the vehicle are observed. Time-domain and frequency domain analyses were performed to evaluate ride comfort and the effectiveness of controllers.


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Citation Formats
B. Ç. Büyüker, “Comparison of different active suspension control strategies using half car model,” M.S. - Master of Science, Middle East Technical University, 2020.