Indirect Model Reference Adaptive Control ...

The direct scheme of Model Reference Adaptive Control System (MRACS) may have several disadvantages; (i) the current state of the plant cannot be easily grasped from values of adjustable adaptive controller parameters, (ii) it has often inferior conditions to an indirect scheme, with respect to the persistent excitation (PE) conditions of adjustable controller parameters for convergence to optimal values. Indirect MRACS based on Dynamic Certainty Equivalent (DyCE) principle hasnot been well studied though the importance of indirect scheme is recognized in an actual field using adaptive control. This paper presents new two design schemes of indirect MRACS based on DyCE principle. These are realized by recursive identifiers and new high order tuners.