Computer control method of tree structure production system
A production system, tree-structured technology, applied in the directions of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problems of difficult mathematical models, difficult to obtain the analytical solution of the optimal safety point, etc., and achieves significant savings in production costs. The effect of minimizing the cost of underproduction
Inactive Publication Date: 2010-06-02
SOUTHEAST UNIV
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For relatively simple production systems such as single-machine and dual-machine, when using the safety point strategy for production control, the analytical solution of the optimal safety point can be obtained through a mathematical model, while for other more complex production systems, Akella et al. Transactions on Automatic Control" (IEEE Automatic Control Magazine), 31(2), 116-126, 1986, "Optimal control of production rate in a failure pronemanufacturing system (optimal control of production rate in a failure pronemanufacturing system)", the The research in this paper shows that it is often difficult to establish a mathematical model of system cost, and it is also difficult to obtain the analytical solution of the optimal security point
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[0029] The technical solution adopted by the present invention to solve its technical problems and the specific implementation methods are as follows
[0030] 1. Tree structure production system
[0031] The tree structure production system that the present invention relates to (see figure 1 ),Depend on A device prone to failure consists of a device M i Both the time between failures and the recovery time obey a certain probability distribution. When device M i The workpiece can be processed without failure, and the maximum processing rate is r max i , r max i > 0 ; When device M i When it is in a fault state, it cannot process any workpiece. When the equipment M i When the fault is repaired, it can process the workpiece again. The demand for the finished product is a uniform Poisson flow with a constant parameter d of the Poisson distribution. equipment i state with s i (t) ∈ {0, 1} mean...
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The present invention relates to a computerized control method of a tree-structured production system. The computerized control method has the following characteristics: firstly, a tree-structured production system model is constructed, a safe point policy is adopted to control the production speed rate of each processing device in a system emulator, then a computerized emulation method is adoptedto derive the average production cost of the system, and on the basis, an iterative learner utilizes an iterative learning method to optimize a safe point, so that an optimal safe point is obtained;based on the safe point policy, a data acquisition terminal system, provided with a programmable logic controller (PLC) and an industrial personal computer, and based on the RFID technology and a production monitor including a transfer machine and the processing device, controls the production of the system.
Description
technical field [0001] The present invention relates to the computer control of the production rate of the processing equipment of the production system, especially the computer control method of the tree structure production system (that is, one processing equipment can have multiple predecessor equipment, but only one successor equipment). Background technique [0002] The research on production control of existing manufacturing systems mainly focuses on single-machine, double-machine, and serial production systems, while research on tree-structured production systems is relatively rare. In actual production, the tree structure is also a common structure in the production system (especially the product assembly system). Due to the complexity of the system, how to quickly optimize its safety points when using the safety point strategy to control its production is a key issue. more difficult question. For relatively simple production systems such as single-machine and dual-...
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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 严洪森杨宏兵施文武汪峥
Owner SOUTHEAST UNIV