...Huiqing Xie A new method is proposed for robust partial quadratic eigenvalue assignment problem (RPQEAP) with repeated prescribed eigenvalues. We first derive a result on the solution of partial quadratic eigenvalue assignment problem, which leads to the partial Schur form of the closed-loop system...

...Anusree Mandali; Lili Dong A robust cascade control system based on active disturbance rejection controller (ADRC) is originally developed for accurate position control of a pneumatic servo system, which is usually characterized by nonlinearity, uncertainty, and disturbance. The proposed control...

...Mohammad Tavazoei; Mohammad Hassan Asemani This paper focuses on the stability analysis of linear fractional-order systems with fractional-order 0 < α < 2 , in the presence of time-varying uncertainty. To obtain a robust stability condition, we first derive a new upper bound for the norm...

... is constructed. Considering the existence of the model mismatch, the internal model control is implemented. As the model is switched among the different operating zones, the piecewise robust filters are proposed to improve the robust stability and transient performance of the control system. Finally...

... obtained in this paper provide useful guidance for selecting the most robust controller from a given class of stabilizing controllers in terms of L 2 gain. As a summary, the general procedures to find a robust controller by L 2 -gain method can be stated as follows: 1 Synthesize a class...

... which are required to handle the further parametric uncertainties and exogenous unbounded disturbances that will arise on the deduced structure. The design of the linear control gains is performed within robust closed-loop pole clustering using a linear matrix inequality approach. Finally, various...

...SangJoo Kwon; Wan Kyun Chung A combined observer is synthesized by unifying the conventional linear state estimator and the perturbation observer to estimate plant uncertainties and disturbances. It enables robust state estimation for uncertain dynamical systems and simultaneously, provides full...