Adaptive Engine Control

Robustness is a major consideration in any controls application. A controller that goes unstable with only a slight disturbance is useless especially in the harsh environment of an automobile. Therefore any scheme that increases the robustness without harming response time is very welcome. Adaptation is one such scheme and in our case we have two slowly varying values that lend themselves to it. Our original control scheme is a two surface sliding control that reduces the relative order to one. Therefore the adaptive derivations follow a standard sliding derivation. This derivation results in two adaptive laws that are implemented in both simulation and on a microprocessor controlled car engine.