Active suspension control design for optimal road roughness isolation and ride comfort

An active suspension control design for a half-car two-dimensional model using LQ optimal control with regional pole constraints is investigated. A new successive approximation algorithm is used to design the static state feedback control law which guarantees a reasonable trade-off between the value of the performance index for which the system is designed and the design requirement that the closed-loop poles reside within the prescribed stability region. By carefully choosing the initial stabilising gain for the algorithm, considerable improvement in the transient properties of the closed-loop system can be obtained to achieve a reasonable tradeoff between ride comfort and road roughness isolation.