Discrete-time saturation constrained adaptive pole assignment control

The performance of a discrete-time adaptive pole assignment controller subject to a saturation control constraint is analyzed. Closed-loop system stability is established for a class of type-I plants. In the presence of plant modeling uncertainties and disturbances, it is shown that the stability is maintained by implementing a simple fixed deadzone in the parameter estimator. If the plant is free from the modeling uncertainties and disturbances, the deadzone threshold can be set to zero. Then, the closed-loop system can be characterized by the desired poles when the control input is not saturated.<
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