Event-Triggered Adaptive Output Feedback Control For Several Classes Of Switched Nonlinear Systems

As an important class of hybrid systems,switched systems can effectively describe the phenomenon of multi-mode switching in actual engineering.Therefore,studying the control problems of switched nonlinear systems is of great important theoretical significance and application value.With the rapid development of the network technology,the amount of data transmission in the network is becoming large.The traditional time-triggered control may cause a large amount of redundant information to be transmitted,resulting in a waste of limited network resources.Recently,the proposed event-triggered control,which can reduce the burden of computation and communication,has received increasing interest.Based on adding one power integrator technique,dynamic gain technology,and stochastic system theory,this paper aims to solve the event-triggered adaptive output feedback control problem for several classes of switched nonlinear systems.The main contents are summarized as follows:1.The event-triggered output feedback control problem is investigated for a class of switched nonlinear systems with unknown output function and arbitrary switching.Based on the dynamic gain technology,a full-order observer is constructed to estimate the unmeasured system states.By adding one power integrator technique,a new event-triggered output feedback control strategy is designed to reduce the amount of data transmission,and it is proved that all signals of the closed-loop system are bounded.The validity of the proposed control method is verified by two examples.2.An event-triggered output feedback control scheme is proposed for a class of p-normal switched nonlinear systems with unknown growth rates.A state feedback controller of the nominal system is designed by using adding one power integrator technique.In order to estimate the unmeasured system states,a reduced-order observer is constructed.Based on the dynamic event-triggered mechanism,a novel event-triggered output feedback controller is designed.It can be proved that all signals of the closed-loop system are bounded and the system states converge to the origin.A numerical example is presented to exhibit the effectiveness of the proposed method.3.The problem of event-triggered output feedback control is considered for a class of switched stochastic nonlinear systems whose drift and diffusion terms satisfy lower-triangular homogeneous growth conditions with unknown growth rates.Two dynamic gains and a gainbased full-dimensional observer are introduced to deal with unknown growth rates and reconstruct the unmeasured system states,respectively.On the basis of adding one power integrator technique,an event-triggered control scheme with dynamic threshold is designed to regulate the system states to the origin almost surely.The effectiveness of the designed control scheme is verified by two examples.4.For a class of p-normal switched stochastic nonlinear systems,the output feedback control problem under event-triggered mechanism is considered.By virtue of adding one power integrator technique,the continuous output-feedback control signal is designed for the nominal system.A new adaptive update law and an event-triggered output feedback controller are designed by using the homogeneous system theory.It is proved that all signals of the closed-loop system are bounded in probability.The validity of the presented strategy is elucidated via two examples.