access icon free Digital design of adaptive repetitive control of linear systems with time-varying periodic disturbances

The repetitive control is well known for rejecting the periodic disturbances. However, most of the existing repetitive control algorithms assume that either the plant is known or the disturbance period is fixed. This study proposes the digital design of adaptive repetitive control for a class of linear systems subject to time-varying periodic disturbances, whose periods are assumed to be identifiable. The proposed control is based on the direct adaptive control scheme and the internal model principle. A comparative study is conducted and the effectiveness of the approach is verified in simulations and experiments on a servo motor system.

Inspec keywords: time-varying systems; model reference adaptive control systems; linear systems; digital control; control system synthesis

Other keywords: linear systems; direct adaptive control scheme; repetitive control algorithms; servo motor system; disturbance period; time-varying periodic disturbances; digital adaptive repetitive control design

Subjects: Control system analysis and synthesis methods; Control engineering computing; Time-varying control systems; Self-adjusting control systems

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