Optimal Linear Controller Design for Periodic Inputs

Optimal Linear Controller Design for Periodic Inputs proposes a general design methodology for linear controllers facing periodic inputs which applies to all feedforward control, estimated disturbance feedback control, repetitive control and feedback control. The design methodology proposed is able to reproduce and outperform the major current design approaches, where this superior performance stems from the following properties: uncertainty on the input period is explicitly accounted for, periodic performance being traded-off against conflicting design objectives and controller design being translated into a convex optimization problem, guaranteeing the efficient computation of its global optimum.

The potential of the design methodology is illustrated by both numerical and experimental results.

Proposes a new design structure that overcomes uncertainty in the input period of periodic systems Reduces the necessity to trade off periodic performance against lowered measurement noise and stricter requirements for accurate models Expresses controller design in terms of convex optimisation allowing for efficient computation of global optima

Inhalt
Design Methodology for Controllers Facing Periodic Inputs.- Application to Feedforward Control.- Application to Estimated Disturbance Feedback Control.- Application to Repetitive Control.- Application to Feedback Control.- Experimental Validation on an Active Air Bearing Setup.- Conclusions.