Observer based output feedback regulation of a class of feedforward nonlinear systems with uncertain input and state delays using adaptive gain |
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Affiliation: | 1. Hubei Provincial Collaborative Innovation Centerfor New Energy Microgrid, China Three Gorges University, Yichang, Hubei 443002, China;2. Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Pretoria, South Africa;3. School of Automation, Huazhong, University of Science and Technology, Wuhan, Hubei 430074,China |
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Abstract: | We consider a global regulation problem of a class of feedforward nonlinear systems with uncertain delays by output feedback. The considered system is a generalized feedforward time-delay nonlinear system in the sense that an additional uncertain constant delay exists in the main control input to the system and feedforward nonlinearity includes states and input which have uncertain time-varying delays. Moreover, when feedforward nonlinearity satisfies some restrictive condition, we extend our control problem to the case such that the delay in the main control input is also a time-varying delay. To globally regulate the considered system, we develop an output feedback controller whose gain-scaling factor involves an adaptive dynamic. Two examples are given for illustration. |
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Keywords: | Feedforward nonlinear system Uncertain input and state delay Adaptive gain-scaling factor Output feedback |
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