Study on Stability of Job-Shop Based on Pinning Control
Aimed at the problems of high complexity,difficult control and delayed control effect in the job-shop production,a control strategy based on the pinning control theory is proposed,which take the key nodes as the control target.The state of the manufacturing nodes is characterized by the material smoothness of the node,and the state equation of discrete time coupling pro-duction network is established.By constructing the controller,the state model of the pinning control network is established,and the key control nodes are selected according to the statistical characteristics of the network,the stability criterion of the production network in the job-shop is analyzed.Taking a machining job-shop as an example,the time step and the failure frequency of net-work nodes of the disturbed system are simulated and discussed under three control strategies of uncontrolled,self-controlled and pinning control.The results show that the control strategy can effectively reduce the time needed to restore the stability of the sys-tem and reduce the influence range of disturbance by controlling a small number of key nodes,and the state of each node is closer to the expected value when the system is stable.The research results can provide a theoretical basis for the decision-making of pro-duction process stability control under the disturbance environment.
Production NetworkState EquationPinning ControlStability
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