Feedback Control of Dynamic Systems
Feedback Control of Dynamic Systems
Automatica (Journal of IFAC)
Brief Synthesis of H∞ PID controllers: A parametric approach
Automatica (Journal of IFAC)
Design of PID controllers satisfying gain margin and sensitivity constraints on a set of plants
Automatica (Journal of IFAC)
Robust decentralized control of perturbed fractional-order linear interconnected systems
Computers & Mathematics with Applications
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This article focuses on H"~ performance design for fractional-order systems with time-delay, using fractional-order proportional-derivative (PD^@m) controllers. First, the stabilizing parameters region in proportional-derivative plane of PD^@m controller, for a fixed derivative-order, is determined in terms of a graphical stability criterion applicable to fractional-order time-delay systems. Then, in the stabilizing region, the pairs of proportional and derivative gains of PD^@m controller are calculated for a range of frequencies, which satisfy the H"~-norm constraint of complementary sensitivity function and define the H"~ boundary curve. Finally, by changing the derivative-order of PD^@m controller, we observe the relationship between the H"~ curve and the derivative-order. Examples are followed to illustrate the design procedure.