Selection of sensors and actuators based on a necessary condition for robust performance

A recently presented method for actuator and sensor selection for linear control systems is applied and evaluated for an active suspension control problem. The aim is to eliminate actuator/sensor combinations, for which no controller exists that achieves a specified level of robust performance. Complete controller synthesis is avoided by using necessary conditions for robust performance. Due to this, it is not guaranteed that a stabilizing controller can be constructed for combinations passing the conditions. This is a major shortcoming of the method. The effectiveness and efficiency of the selection procedure are assessed and compared with μ-synthesis.