Design & application of adaptive variable structure & H∞ robust optimal schemes in nonlinear control of boiler-turbine unit in the presence of various uncertainties

摘要: Abstract In this article, to improve the precision, performance and robustness of an industrial boiler-turbine, two robust controllers are designed. First, a adaptive variable structure control scheme (RAVSC) is proposed nonlinear multi-inputs multi-outputs (MIMO) model boiler-turbine unit, in presence significant uncertainties external disturbances. To guarantee reliable RAVSC, appropriate adaption laws introduced compensate modeling imprecisions convergence sliding surface. Then, stability RAVSC proved via Lyapunov theory. Moreover, H ∞ controller designed based on μ − D K i t e r o n , with assumption rational deviation parameters suitable weights attenuate signals. investigate schemes, simulation studies carried out dynamic various uncertainties. exposed discussion which reveals satisfactory both controllers. However, it observed that has some minor advantages over controller.