| With the advancement of network technology and the development of control theory,the network control systems(NCSs)has become a hot topic in the control field and it has been widely used in aerospace,equipment manufacture,process control and other fields.However,the traditional time-triggered control needs to use the information of system states in a frequent manner,which might lead to the waste of the communication resources and even network congestions in the NCSs.Therefore,event-triggered control and selftriggered control,which are proposed as a way to save system communication resources and reduce energy consumption,have attracted much attention from many scholars.On the other hand,input constraints are ubiquitous in all practical systems.Therefore,it is very meaningful to study the event-triggered and self-triggered control algorithms for control systems with input constraints.This thesis comparatively systematically studies the event-triggered and self-triggered control algorithms for the linear systems with input constraints,and applications to the spacecraft rendezvous control system verify the effectiveness of all the designed algorithms.The main results are listed in the following.1.The event-triggered and self-triggered control algorithms for the general ANCBC linear systems with input constraints are designed,respectively.Based on the continuous and discrete parameter Lyapunov equation,different event-triggered and self-triggered control algorithms are designed to solve the semi-global stabilization problem of the continuous-time and discrete-time general ANCBC linear systems with input constraints.For continuous-time systems,the designed control algorithms not only avoid the Zeno phenomenon but also give the relationship between the minimum inter-event time and the design parameters.For discrete-time systems,the designed algorithms not only give the minimum inter-event interval and the sufficient condition that guarantees the non-triviality of the concerned algorithms,but also analyze the relationship between the minimum interevent interval and the design parameter.Compared with the existing results,the minimum inter-event time of the designed algorithms avoids the complicated relationship with the system matrix and analyzes its the relationship with the design parameters.These properties allow us to make a trade-off between the minimum inter-event time and the control performance by adjusting the parameters.2.Based on the above theoretical results,the discrete gain scheduled static/dynamic event-triggered and self-triggered control algorithms of continuous-time and discrete-time ANCBC linear systems with input constraints are further studied.Apart from the abovementioned advantages,the proposed control algorithms further improve the corresponding triggered conditions.Compared with the existing theoretical results,the proposed control algorithms can save communication resources and yield a better control performance in the meantime.3.The dynamic gain scheduling based static event-triggered and self-triggered control algorithms are firstly designed to achieve the semi-global stabilization of the general ANCBC linear system with input constraints.The designed algorithms not only avoid the Zeno phenomenon but also give an explicit relationship between the design parameters and the minimum inter-event time.Then dynamic gain scheduling based static and dynamic event-triggered and self-triggered control algorithms of the general continuoustime linear systems with input constraints are also designed,respectively.The designed algorithms can also change the minimum inter-event time according to the practical engineering requirements.In some cases,the minimum inter-event time of the designed control algorithms can be designed as an arbitrarily large bounded constant.4.The problem of finite-time stabilization of the general continuous-time linear systems with input constraints is studied.By co-designing the event-triggered mechanism and the time-varying parameter determines the convergence rate of the closed-loop system,an event-triggered control method is proposed to solve finite-time stabilization problem for general continuous-time linear systems with input constraints.Moreover,in order to avoid continuous monitoring of the system states,the corresponding self-trigged control algorithm is also designed.In addition,the designed control algorithm can also be used to address the finite-time semi-global stabilization problem of the ANCBC linear system with input constraints. |
