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Event trigger control method of saturated nonlinear networked industrial control system

An industrial control system and event-triggered technology, applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as low performance of control methods and inaccurate modeling, and achieve effective control and safe operation , to avoid the effect of state saturation nonlinear constraints

Active Publication Date: 2020-12-18
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0004] Aiming at the problems of inaccurate modeling of complex nonlinear industrial control systems and low performance of control methods in the prior art, the present invention proposes an event-triggered control method for saturated nonlinear networked industrial control systems
In the process of system modeling, the influence of state saturation, actuator saturation and external disturbance on the system control effect is considered at the same time. By constraining the system state in a finite set, the state saturation nonlinear constraint is avoided, and the low gain is used Feedback method solves the problem of actuator saturation

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  • Event trigger control method of saturated nonlinear networked industrial control system
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  • Event trigger control method of saturated nonlinear networked industrial control system

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Embodiment Construction

[0063] Below in conjunction with specific embodiment, the present invention is further elaborated:

[0064] The present invention specifically includes:

[0065] (1). Establish a state-space model of a saturated nonlinear networked industrial control system:

[0066] Based on the measured data and mechanism modeling analysis method, the following state space model of networked industrial control system with saturated nonlinearity is established:

[0067] x(k+1)=h(Ax(k)+Bsat(u(k))+Mω(k))

[0068] z(k)=Cx(k)

[0069] in, Represents the state vector of the nonlinear networked industrial control system at time k, symbol Represents an n-dimensional column vector; x(k)=[x 1 (k)x 2 (k)x 3 (k)] T , x 1 (k), x 2 (k) and x 3 (k) respectively represent the pressure value, temperature value and velocity value of the system at time k, and the superscript T represents the transposition of the matrix or vector;

[0070] Represents the controlled output vector of the nonlinear...

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Abstract

The invention discloses an event trigger control method of a saturated nonlinear networked industrial control system. The method comprises the following steps: establishing a saturated nonlinear networked industrial control system state space model, designing a saturated nonlinear networked industrial control system state feedback controller based on event triggering, establishing a closed-loop system state space model, analyzing the stability and the passivity of a closed-loop system, and solving a feedback controller of the saturated nonlinear networked industrial control system based on event triggering. By designing the state feedback controller based on event triggering, the problem that the system cannot continuously, effectively and safely operate due to the fact that the influenceof state saturation, actuator saturation and external interference on the control performance of the industrial control system is rarely considered at the same time in an existing control method of the industrial control system is solved. The method can be used for effective control and safe operation of a complex networked nonlinear industrial control system.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to an event-triggered control method for a saturated nonlinear networked industrial control system. Background technique [0002] With the rapid development of industrialization, higher requirements are put forward for the control accuracy, performance optimization and safe operation of industrial control systems. For more and more complex modern large-scale industrial production objects, the networked control method applies computer network and communication technology to complex industrial control objects, which greatly improves the performance and production efficiency of complex industrial control systems. In actual complex industrial control systems, state saturation and actuator saturation are two common saturated nonlinear phenomena. If these two types of saturated nonlinearities are not fully considered in the stability analysis and controller design o...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042Y02P90/02
Inventor 陈云周修阳柏建军江爱朋张克勤
Owner HANGZHOU DIANZI UNIV
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