Multi-wire cutting machine mortar temperature intelligent PID control method
A multi-wire cutting machine and control method technology, applied in the field of control systems, can solve the problems that temperature control is difficult to meet system requirements, difficult to meet higher requirements, etc.
Active Publication Date: 2012-01-18
DALIAN LIANCHENG NUMERICAL CONTROL MACHINE
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Problems solved by technology
[0003] Due to the basic structure of mutual constraints between parameters, conventional PID is difficult to meet the higher requirements of both dynamic and static indicators in industrial sites; in practical applications, temperature control is difficult to meet system requirements
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[0013] Such as figure 1 In the multi-wire cutting machine mortar temperature intelligent PID control system shown, the industrial computer 1 presets a given value, and the temperature sensor 2 is installed at the mortar outlet. The temperature sensor inputs the real-time temperature measurement signal into the industrial computer for PID calculation. The difference between the measured value and the given value is calculated by PID, and the industrial computer outputs an analog value to control the opening of the cooling water flow regulating valve 3 of the heat exchanger. The heat exchanger is composed of a closed container, with cooling water inlet and outlet, and mortar inlet and the outlet, the middle is a plurality of pipes through which the mortar passes, the mortar pipe 4 is surrounded by cooling water, and a cooling water flow regulating valve is installed on the cooling water inlet pipe of the heat exchanger, and the cooling water flow can be changed by controlling the...
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The invention relates to a wire cutting machine mortar temperature control system. In the multi-wire cutting machine mortar temperature intelligent PID control system, an industrial computer presets a specified value; a temperature sensor is arranged at the mortar outlet, and inputs real-time temperature measurement value signals in the industrial computer for carrying out PID calculation; the difference value between the measurement value and the specified value is calculated by PID calculation; and the industrial computer outputs a simulation quantity value to control the opening of the cooling water flow regulating valve of a heat exchanger, thus changing the flow of the cooling water to lead the mortar temperature to keep invariable. The system uses the rapid reaction of classical PIDcontrol, is combined with the specific production conditions, and simultaneously distinguishes whether the measurement value deviates from the specified value (trailing direction) or approaches to the specified value (trending direction), wherein the PID calculation is diided into three steps,; and a PID controller adopts PI to inhibit deviation or separates PI to maintain control or carries out brake control according to trailing direction or trending direction, thus leading the measurement value to approach to the specified value as quickly as possible.
Description
1. Technical field: [0001] The invention relates to a control system, in particular to a mortar temperature control system of a wire cutting machine. 2. Background technology: [0002] The mortar temperature is one of the important parameters in the cutting process of the multi-wire cutting machine, because the mortar temperature will affect the viscosity of the mortar and the flow of the mortar at the same time, so the control of the mortar temperature and the control of the mortar flow will produce coupling, and the temperature control is good or bad It is directly related to the control accuracy of the mortar flow. [0003] Due to the basic structure of mutual constraints between parameters, conventional PID is difficult to meet the higher requirements of both dynamic and static indicators in industrial sites; in practical applications, it is difficult for temperature control to meet system requirements. 3. Contents of the invention: [0004] The purpose of the present...
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IPC IPC(8): G05D23/20G05B11/42
Inventor 聂凤军李冬川
Owner DALIAN LIANCHENG NUMERICAL CONTROL MACHINE