The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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.