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This paper proposes an algorithm for periodic output feedback (POF) control for Delta operator systems. The Delta operator creates the rapprochement between analog and discrete dynamic system models and establishes the natural framework to investigate the behavior of discrete dynamic models with fast sampling rates. It is shown here that, the periodic output feedback control fails for discrete-time...
This paper presents a new algorithm for discrete-time sliding mode control using output feedback. It has been shown that, when the output of the system is sampled slower than the input, a discrete-time sliding mode can be obtained. The method is very general and is applicable to any controllable and observable linear time-invariant single input single output system. The proposed technique is illustrated...
This paper proposes a discretization behavior of nonlinear sliding surface based algorithms. Recently nonlinear surfaces are proposed by the authors to improve transient performance of continuous and discrete-time uncertain systems. The nonlinear surface changes system's closed loop damping ratio as output approaches the setpoint. In this paper we propose a nonlinear surface for the system represented...
A method to design a high performance robust tracking controller to track step references for uncertain continuous MIMO plant is presented. A non-linear sliding surface is proposed by which the damping ratio of closed loop system is increased as output approaches setpoint. Stability with the proposed non-linear surface is proved. A new control law is designed to guarantee the existence of sliding...
This paper considers a robust sliding mode control scheme using multirate output feedback. Using different plant output rates including the former plant output information, sampling error at multiple sampling interval is considered to discrete-time output feedback control design. As a result, control performance can be improved. Meanwhile, the multirate output feedback can also guarantee closed-loop...
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