Journal
JOURNAL OF VIBRATION AND CONTROL
Volume 28, Issue 9-10, Pages 1109-1125Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1077546320987940
Keywords
Robust tracking problem; sandwich systems; dead-zone nonlinearity; adaptive backstepping; input saturation constraint; electrohydraulic servo press system
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Funding
- Iran National Science Foundation (INSF) [99002366]
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This article investigates the output tracking problem of uncertain nonlinear sandwich systems with sandwiched dead-zone nonlinearity, proposing a phased design method to address the design complexities. Simulation results demonstrate the acceptable accuracy and effectiveness of the proposed method.
This article studies the uniformly ultimately bounded output tracking problem of uncertain nonlinear sandwich systems with sandwiched dead-zone nonlinearity in the presence of some practical constraints such as nonsymmetric input saturation, model uncertainties, time-varying external disturbances, and unknown parameters. Due to the existence of both dead-zone and saturation nonlinearities, the design process is more complicated; therefore, to solve the design complexities, the designing process is divided into two phases. The proposed method leads to output tracking with acceptable accuracy. Moreover, all signals in the closed-loop system are ultimately bounded. Simulation results illustrate the applicability and effectiveness of the proposed method by its application on two practical sandwich systems (robotic system and electrohydraulic servo press system).
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