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Model following control system (MFCS) can output general signals following the desired ones. In this paper, a method of nonlinear model following control system will be extended to be a nonlinear system in discrete time. The nonlinear system studied in this paper has the property of norm constraint ?? f (v(t)) ?? ???? + ????v(t)????, where ?? ?? 0, ?? ?? 0, 0 ?? ?? ?? 1. In this case, a new criterion...
Aiming at first-order inertial systems with time-delay this paper presents a new method of auto disturbance rejection control (ADRC) parameter tuning, in which it confirms the corresponding relationship of ADRC parameters for different objects in groups of the ??/T value, and with the method of time transformation and gain transformation. The procedure of different objects parameter tuning is simplified...
A design scheme of adaptive neural controller for a class of uncertain SISO nonlinear time-varying delay systems with unknown nonlinear dead-zones and unknown function control gain is proposed. The design is based on the principle of sliding mode control and property of Nussbaum-type functions. The approach relaxes the hypothesis that the upper bound of function control gain is unknown constant and...
To a class of uncertain nonlinear discrete time delay systems, this paper considers the problem of non-fragile guaranteed-cost Hinfin controller design method. First, based on the stability criterion and linear matrix inequalities (LMIs) theory, a sufficient condition of the existence of the non-fragile guaranteed-cost Hinfin controller is established. Then the problem of control is solved via a robust...
A multi-model controller based on the neural network sets is proposed for the time-variant nonlinear systems with uncertainty and time-delay in this paper. The local-models and the local-controllers are built to neural network sets. The output of the controller is the weighted sum of the local-controllers' outputs, and by this way the smooth-switch among the local-models is realized. The robustness...
This paper studies the robust control for a class of nonlinear uncertain chaotic systems with time-delay by using Lyapunov stability theory and the linear matrix inequality (LMI) approach. A sufficient condition for the existence of the time-delay feedback controller is established, and a sufficient condition for the existence of the state observer and the observer-based robust controller is also...
In this paper we deal with the control of chaotic systems. Knowing that a chaotic attractor contains a myriad of unstable periodic orbits (UPO's), the aim of our work is to stabilize some of the UPO's buried in the chaotic attractor and which have interesting characteristics. First, using the input-to-state linearization method in conjunction with a time-delayed state feedback, we design a control...
For the problem of time-varying, nonlinear and time-delay in ventilation system, this paper addressed variable-frequency fuzzy PID control for highway tunnel ventilator, which has disadvantages both dynamic performance of fuzzy control and the steady performance of the PID algorithm. Fuzzy PID algorithm depends on export's experience and fuzzy reasoning, and it can carry out Energy-saving from enhancing...
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