An approach for studying stability of adaptively controlled systems subject to bounded disturbances with unknown statistics is given. A shorter proof of some results established for minimum phase systems is also given; new results are established for nonminimum phase systems. In each case, the uniform boundedness of all signals is proven under a condition that is discussed. Examples of adaptive schemes that can be treated with this approach are given.
['Claude Samson']
Brief paper: Stability analysis of adaptively controlled systems subject to bounded disturbances