Optimal
H<sub>2</sub> Input Load Disturbance Rejection
Controller Design for Nonminimum Phase Systems Based on Algebraic
Theory
- Publication date
- Publisher
Abstract
This
work discusses the issue of input load disturbance rejection
(ILDR) for open-loop nonminimum phase (NMP) plants. A novel analytical
solution is proposed on the basis of the internal model control (IMC)
theory. Differing from other methods, the proposed design is conducted
to optimize the ILDR criterion. Optimization of the input disturbance
response of the controller is performed under the constraints on robustness.
When the input load disturbance is taken into consideration, the proposed
controller performs better disturbance rejection capability in terms
of 2-norm than most explored IMC-based controllers derived from the
conventional criterion. Typical NMP processes are systematically analyzed.
Numerical examples are given to illustrate the effectiveness of the
novel solution. The quantitative performance specifications and robust
stability can be obtained by monotonously tuning the single parameter.
Results show that the proposed solution makes the proposed method
yield the expected dynamic responses