Constrained predictive hybrid fault-tolerant control method for multi-stage batch process based on 2d model

Abstract

The present invention provides a 2D model-based multi-stage intermittent process limited prediction hybrid fault-tolerant control method, including the following steps: Step 1, aiming at different stages in the intermittent process, establish a two-dimensional fault-based state-space model for the controlled object Predictive control system model; step 2, for the above-mentioned new 2D predictive fault system model, design a predictive linear quadratic fault-tolerant controller; step 3, for the new two-dimensional system predictive model of step 1.2, find out the sufficient stability of the system robustness index Conditions and design switching laws; the advantage of the present invention is that it does not need to find out the setting of other parameters, and directly obtains the value, which not only can ensure the optimal control performance of the system, but also can shorten the system running time and produce efficiently.

Description

technical field [0001] The invention belongs to the field of advanced control of industrial processes, and relates to a 2D model-based multi-stage intermittent process limited prediction hybrid fault-tolerant control method. Background technique [0002] With the rapid development of society, people's requirements for high-quality batch production are getting higher and higher. This high requirement has led to more complex production operations, coupled with long-term repeated work of industrial equipment, the possibility of failure is increasing. The main faults of the control system include actuator faults, sensor faults, and system internal faults, and the actuator faults have the greatest impact on system control. Once the actuator fails, the system will be out of control, and even cause equipment damage, property loss and personnel safety problems in severe cases. [0003] In order to solve the above problems, the fault-tolerant control technology of batch process is ...

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Problems solved by technology

The second is to seek suitable switching conditions and running time for different stages of the batch injection molding process; the third is to design a simple, real-time and flexible controller according to the normal and fault systems. When the system is normal, use the controller designed for the normal system. When the system fails, adjust accordingly to the controller designed for the faulty system to improve its control quality, solve the drawbacks of the existing method that the controller gain cannot be adjusted throughout the process, and thus achieve the goal of energy saving and consumption reduction

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