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Sliding mode observer-based adaptive control of uncertain singular systems with unknown time-varying delay and
1School of Automation, Qingdao University, Qingdao 266071, China; Shandong Key Laboratory of Industrial Control Technology, Qingdao University, Qingdao 266071, China.
Abstract:
A novel adaptive sliding mode observer-based control strategy is put forward for a type of uncertain singular systems subject to unknown state delay, input nonlinearity and uncertain perturbation in this article. Firstly, the unmeasured state is reconstructed by a particular observer without any inputs, from which a novel linear switching surface is provided. Subsequently, performance analysis of the resultant system on the switching surface is ensured under a new admissibility criterion. An associated adaptive control signal is synthesized to ensure that the established switching surface can be attained in finite moment. Finally, three numerical simulations are conducted to confirm the validity and superiority of the specified method.
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