- Garg, D.P., On the absolute stability of nonlinear control systems using notch compensators,
ISA Trans. (USA), vol. 10 no. 2
pp. 194 - 202 .
(last updated on 2007/04/10)
This paper discusses the design of general symmetric and unsymmetric notch compensator structures for nonlinear systems of Aizerman's type. Absolute stability is used as the constraint condition and the Popov and circle criteria are applied for compensator design. The notch compensator is chosen for system synthesis in view of its desirable frequency domain characteristics. It was found that the notch compensator permits large system gains and maximum bandwidth. Numerical examples are used to illustrate design results in parameter plane and parameter space. Although the design approach advanced is digital-computer oriented, a paper-and-pencil equivalence is easily implemented
nonlinear systems;Popov criterion;stability;