SLIDING MODE STABILIZATION OF UNCERTAIN SYSTEMS USING ONLY OUTPUT INFORMATION

A practical procedure is presented for synthesizing output feedback co ntrollers for uncertain systems based on sliding mode concepts. The cl ass of systems to which the results apply is identified and includes t he requirement that the nominal linear system is minimum phase. The pr ocedure proposed for the design of the sliding surface uses establishe d output feedback eigenvalue assignment results. It will be shown that all the assumptions imposed on the system pertain to the design of th e sliding surface. The proposed controller, which guarantees attainmen t of a sliding mode despite the presence of uncertainty requires no ad ditional assumptions.