Idle Speed Control Design using an H-Infinity Appoach

This paper considers the design of an idle speed control law for a fuel injected engine. The modelling procedure, including the use of System Identification techniques, is discussed and then emphasis is placed on the control law design using an H-Infinity approach. The choice of appropriate weighting functions is crucial in H-Infinity design and design iterations are discussed. The final control law is shown to have good performance in simulation and to be robust to parameter perturbations: it represents a good starting point for future implementations.