The faintness of temperature of plastic packer heal controls a method

  • Time:
  • Click:89
  • source:KOMANG CNC Machining
Foreword is plastic when packer is working, the discretion of heal temperature can affect product quality directly, exorbitant or temperature is too low, can cause the defect of the product, those who affect a product is beautiful. It is so in packer, to the temperature of heal control is very important. We are in course of development packer pilot, use sheet piece opportunity is right temperature of plastic packer heal has alone control, better to achieve dominate lukewarm result, used faintness to control a method. Classics experiment, the system is had accuse lukewarm precision tall, accuse Wen Ping's firm characteristic, obtained better control result. Of 1 system make a plan 1 gave out control structure of the system, whole apparatus measures lukewarm part by couple, faintness controls a share, output control part and odd 4 parts form an engine system, the sheet in the graph piece machine use AtmelrAT89C51, it has the RAM of the FLASH program memory of 4K, 128 byte, line of 32 I/O opening, 2 the serial mouth of 16 timer and a full duplex operation. Have stronger instruction system, have the better support that develops a tool, the control task of the heal temperature that enough finishs pair of packer. This control uses the sensor that thermocouple measures as temperature, measures temperature parameter classics regards ambiguous pilot as input quantity after processing, get with ambiguous algorithm the control of output is measured, heat with what add shrinkage fitting buy at dominating say sth definitive so as to prevent further discussion the control that power will come to to realize temperature. In measuring the temperature in packer accurately of 2 temperature to control, use thermocouple to regard as measure temperature sensor. Thermocouple has a structure simple, measure lukewarm range big, answer fast characteristic, receive wide application so. But thermocouple also exists output is nonlinear, the Leng Duan temperature of measures temperature and thermocouple concerns the part that waits for inadequacy. The measurement of temperature uses converter of amplifier, A/D and Leng Duan to measure lukewarm circuit to comprise by appearance of multichannel switch, small signal, if pursue,2 are shown. What change-over circuit of the A/D in the graph makes appliance has much passageway to input is serial 12: A/ D converter TLC2543. Appearance chooses the AD620N of high accuracy with amplifier. Of Leng Duan temperature measure use AD590 to regard as measure sensor. Measure with this kind of method lukewarm, can get inside wider temperature range accurate temperature measures an outcome. While the temperature that basic structure is measuring accurately with algorithm is worth 3 ambiguous pilot, the control algorithm that need has had finishs the temperature of pair of packer heal to control. In this device, use ambiguous pilot method to undertake controlling. 3.

1 model gelatinization is in this system, faintness is changed even if want the exact value disperse with a variable input to change, turn into the whole number theory of set inside the country element. The change that the E needing a value of the set temperature Ts that achieves the requirement and the temperature T that measure through thermocouple regards ambiguous pilot as U of an input quantity leads △ E=dE/dt to regard ambiguous pilot as another input quantity, sendout ' the output that is used at dominating circuit of PWM of pulse width modulation, PWM circuit outputs the pulse with corresponding wide arteries and veins to control according to this value heat the size of power. 3.

2 subject the is worth difference variable, poor value certainly change ratio that spends function and language variable and the language that the faintness that exports control quantity measures are worth cent to be 7 archives (negative big, negative medium, negative small, 0, small, in the middle of, , express to be with the symbol: NBNMNSZEPSPMPB; Of ambiguous subclass subject the subject function that spends function to choose triangular weaveform undertakes assigning to E △ EU. If the subject function that the input outputs ambiguous subclass pursues 3. 3.

The control regulation of the design faintness controller with 3 ambiguous regular control is based on an expert or the experience of handlers and skill reach, the standard of unripe set prescription that controls regulation has a lot of, use artificial control experience here, namely systematic rank jumps the basis the response of signal is affirmatory. Reach the faintness below dominates regular list, if express,1 is shown. Faintness controlled regular table to state a group of control are regular, token the faintness of ambiguous system concerns, by control regulation can beg a R of obscure concern matrix. Its form is: 3.

4 ambiguous inference are in this system, because the physical quantity of processing is temperature, react and do not ask very rapid, accordingly, the method that can choose activation regulation inference will realize ambiguous pilot to be handled in real time, use modular gelatinization namely -- , regular computation -- , the real time that sees faintness handles a process. The method of activation regulation inference is: Measure ordinal activation according to the input each are regular, regular to each, what computation inputs subject to each function is subject degree, namely modular gelatinization, take the least value to serve as this regulation to be worth to the commendation of sendout. Recommend what all regulation get the value to undertake incorporating next, use law of area centre of gravity to seek solution, get is in is defeated by fashionable ambiguous pilot sendout at that time. The good point that uses this kind of method is: The memory that take up is less, facilitate adjust, can use at more complex ambiguous inference system. The sendout that via ambiguous regulation inference gets is used at controlling the output of PWM circuit. CNC Milling CNC Machining