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Mobile Control And Estimation For Distributed Parameter Systems With Time Delay

Posted on:2022-09-24Degree:DoctorType:Dissertation
Country:ChinaCandidate:H S FuFull Text:PDF
GTID:1488306527982389Subject:Control Science and Engineering
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Mobile sensor/actuator network is a network system with autonomous perception and intelligent control based on wireless sensor/actuator network.It has been widely applied in recent years and will play a pivotal role in the future with the development of artificial intelligence.Mobile sensor/actuator network is used to control and estimate distributed parameter systems(DPSs)with time delay,which is called mobile control and estimation.Mobile control and estimation are equivalent to adding a dimension to the distributed parameter systems with time delay,which makes the delayed DPSs become more complex and challenging.In this paper,the functional analysis method,operator semigroup theory,abstract development equation theory,Lyapunov stability theory and stochastic analysis are utilized to control and estimate several kinds of delayed DPSs via mobile sensor/actuator network.The main contents are as follows:1.The stabilization problem for a class of reaction-diffusion delayed DPSs and It(?) stochastic delayed DPSs with disturbances are studied based on mobile sensor/actuator network.Firstly,the feedback controller of this delayed DPS is designed based on the network communication set of mobile sensor/actuator.Secondly,the control force is devised based on the dynamics model of the mobile sensors/actuators.Then,the stabilization criteria for two kinds of delayed DPSs are obtained by choosing a suitable Lyapunov functional and using operator semigroup theory,Lyapunov stability theorem.Finally,the numerical simulation shows that the mobile control can improve the control performance of the delayed DPSs,and make the system tend to be stable at a faster speed.The effects of different time delay sizes and different disturbance intensities on the delayed DPSs are also compared.2.In allusion to the cooperative control problem of moving sensors/actuators,the anticollision control between sensors/actuators,the obstacle avoidance control between sensors/actuators and obstacles are studied,combined with the stability control problem of the delayed DPSs.Firstly,a new communication set is defined in the design of the feedback controller,which optimizes the communication energy consumption of sensor/actuator devices.Secondly,the emitter is added to the sensor/actuator and the obstacle avoidance function is designed when we study the obstacle avoidance control between moving sensors/actuators and obstacles.The operator semigroup theory and Lyapunov stability theorem are also used to prove the delayed DPSs asymptotically stable under the control strategy of moving sensor/actuator,which are supported by numerical experiments.3.In order to solve the problem of missing measurement about sensors in the mobile sensor/actuator network,the state estimation for a kind of delayed DPSs is presented.A centralized estimator for a class of diffusion delayed DPSs has been designed and the estimation error system has been constructed,and we have obtained the sufficient condition for the stability of the error system with time delay.At the same time,the distributed estimators are designed under the random missing measurements,and the global asymptotic stability is guaranteed in the mean square by the mobile control and estimation strategy.The random analysis theory and related control theories are utilized to prove it.Numerical simulation results illustrate that the distributed state estimators can estimate the state of original system well when the sensors have missing measurement and have better performance by mobile control and estimation.4.The control problem of distributed parameter systems with input control time delay based on the mobile sensor/actuator networks is discussed,which is complementary to the achievements of distributed parameter systems with state time delay in this paper,and the relevant research results have not been found.Based on the system input delay and the actuator input delay,the feedback controller and the mobile control force with different input delay are designed.The asymptotic stability criteria of distributed parameter system with input control delay and actuator input control delay are obtained by using operator semigroup method,functional analysis technique and Lyapunov stability theory.The simulation results also demonstrate the effectiveness of this mobile control strategy.
Keywords/Search Tags:distributed parameter system, time delay, mobile sensor/actuator network, mobile control, state estimation
PDF Full Text Request
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