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Method for estimating state of networked control system with random uncertainty and delay of distributed sensors

A distributed sensor, networked control technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as inability to deal with uncertainty and time delay of distributed sensors at the same time, affecting the performance of state estimation

Active Publication Date: 2014-03-26
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0004] In order to solve the problem that the existing state estimation method cannot simultaneously deal with randomly occurring uncertainties and distributed sensor time delays, thereby affecting the performance of state estimation, a method with randomly occurring uncertainties and distributed sensor time delays is proposed. State Estimation Method for Networked Control Systems

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  • Method for estimating state of networked control system with random uncertainty and delay of distributed sensors
  • Method for estimating state of networked control system with random uncertainty and delay of distributed sensors
  • Method for estimating state of networked control system with random uncertainty and delay of distributed sensors

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specific Embodiment approach 1

[0051]Specific implementation mode 1. Combination Figure 1 Describe this embodiment, a state estimation method of a networked control system with randomly occurring uncertainties and distributed sensor time-delays described in this embodiment, the specific steps of the method are:

[0052] Step 1. Establishing a nonlinear dynamic model of a networked control system with randomly occurring uncertainties and time-delays of distributed sensors;

[0053] A nonlinear dynamic model of a networked control system with stochastic uncertainties and distributed sensor time-delays is established, and its state space form is:

[0054] x k+1 =(A+α k △A)x k +Bf(x k ) (1)

[0055] y k = Cx k + Dx k - d k + E Σ τ ...

specific Embodiment approach 2

[0092] Specific embodiment 2. This embodiment is a further description of the state estimation method of a networked control system with randomly occurring uncertainties and distributed sensor time delays described in specific embodiment 1. The method described in step 5 The Lyapunov stability theory of is:

[0093] V(η k+1 )-V(η k )<0

[0094] in:

[0095] V(η k )=V 1 (η k )+V 2 (η k )+V 3 (η k ) (9)

[0096] V 1 ( η k ) = η k T P ‾ η k , V 2 ( η k ) = Σ l = k - d k ...

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Abstract

The invention relates to a method for estimating the state of a networked control system with random uncertainty and delay of distributed sensors, particularly to a method for estimating the state of random uncertainty and delay of distributed sensors. The method solves the problem that the existing method for state estimation can not treat the random uncertainty and the delay of distributed sensors at the same time, so the performance of state estimation is influenced. According to the method of the invention, the influence of random uncertainty and delay of distributed sensors on the performance of state estimation is considered at the same time, and a Lyapunov function is used to fully consider the effective information of the delay. Compared with the existing method for estimating the state of a nonlinear complex dynamic system, the method for state estimation of the invention can be used to treat random uncertainty, delay of distributed sensors and bounded time-varying delay at the same time so as to obtain a method for state estimation on the basis of the solution of a linear matrix inequality; therefore, the purpose of resisting nonlinear perturbation can be achieved. The method is suitable for estimating the state of the nonlinear complex dynamic system.

Description

technical field [0001] The present invention relates to a randomly occurring uncertainty and sensor time-delay state estimation method. Background technique [0002] State estimation is an important research problem in control systems, and it is widely used in signal estimation tasks in aircraft formation, global positioning system, target tracking system and other fields. [0003] Existing state estimation methods cannot simultaneously deal with randomly occurring uncertainties and distributed sensor time-delays, which in turn affect state estimation performance. Contents of the invention [0004] In order to solve the problem that the existing state estimation method cannot simultaneously deal with randomly occurring uncertainties and distributed sensor time delays, thereby affecting the performance of state estimation, a method with randomly occurring uncertainties and distributed sensor time delays is proposed. State Estimation Method for Networked Control Systems. ...

Claims

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Application Information

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IPC IPC(8): G05B13/00
Inventor 胡军陈东彦武志辉徐龙于浍
Owner HARBIN UNIV OF SCI & TECH
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