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This paper deals with a robustness analysis of a disturbance observer (DO) based filtered PI control (DO-FPI) for integral first order plants based on the performance portrait method. For the loop robustification and a noise attenuation the loop is augmented by n-th order filters used in the inner DO loop, as well as in the outer loop with the stabilizing P controller. Although the derived results...
The paper is concerned with the problem of robust filtering for a class of systems with state-dependent uncertainties and energy-bounded disturbance. The state-dependent uncertainties can more precisely describe many practical dynamic systems with parameters varying with system states, such as spring stiffness, nonlinear resistor and friction coefficient. A non-quadratic Lyapunov function is adopted,...
In this paper, we investigate the robust weighted H∞ filtering problem for networked systems with multiple sensor faults under the discrete-time framework. The multiple outputs of the plant are measured by separate sensors and each sensor has certain failure rate. Network-induced delay, packet dropouts and network-induced disorder phenomena are all characterized in the modeling of the network link...
In this paper, classical frequency-response multivariable comnpensator design is studied. This problem consists of chosing a linear controller which gives the sensitivity and complementary sensitivity functions desirable properties. The problem is given two formulations as optimal multivariable stability margin (km) synthesis (or ??-synthesis, robustness margin synthesis) problems, thereby establishing...
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