CN107969727A - A kind of multichannel PID control method for automatically switching suitable for throwing smoke machine - Google Patents

A kind of multichannel PID control method for automatically switching suitable for throwing smoke machine Download PDF

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Publication number
CN107969727A
CN107969727A CN201711154711.4A CN201711154711A CN107969727A CN 107969727 A CN107969727 A CN 107969727A CN 201711154711 A CN201711154711 A CN 201711154711A CN 107969727 A CN107969727 A CN 107969727A
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China
Prior art keywords
pid
control
switching
adjusting means
loop
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Pending
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CN201711154711.4A
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Chinese (zh)
Inventor
郭奔
李汉莹
梁婕
邵长岭
李淑萍
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China Tobacco Zhejiang Industrial Co Ltd
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China Tobacco Zhejiang Industrial Co Ltd
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Priority to CN201711154711.4A priority Critical patent/CN107969727A/en
Publication of CN107969727A publication Critical patent/CN107969727A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/06—Loosening tobacco leaves or cut tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/10—Roasting or cooling tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/12—Steaming, curing, or flavouring tobacco
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
    • G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Feedback Control In General (AREA)

Abstract

The control method of cigarette production equipment of the present invention, more particularly to a kind of multichannel PID control method for automatically switching suitable for throwing smoke machine.A kind of multichannel PID control method for automatically switching suitable for throwing smoke machine, the system that this method uses include the first pid loop, the second pid loop, the 3rd pid loop, adjusting means, PID switching selectors and PID switching transient programs；Type of the present invention eliminates single circuit PID control hysteresis quality, reduce human intervention not in time, the influence of the factor such as inaccurate；Type of the present invention automatically selects pid loop in the equipment different operation phase, the control function for realize different phase differentiated, becoming more meticulous, and improves the control ability of smoke machine equipment master control quality index, stabilizes outlet material fluctuation range；Simultaneously because selecting PID switching transient programs, it ensure that and switch the steady gradual change of moment master control quality index in pid loop.

Description

A kind of multichannel PID control method for automatically switching suitable for throwing smoke machine
Technical field
The control method of cigarette production equipment of the present invention, more particularly to a kind of multichannel PID suitable for throwing smoke machine are automatic Method for handover control.
Background technology
The Primary processing shop of Cigarette manufacturing enterprises widely selects the loose tobacco leaf moisting machine of cartridge type, moisture regain tobacco leaf moisting machine, Perfuming machine and baking Silk machine carries out technique processing, although there are multigroup PID control in equipment Controlling model, often a pid loop just for One adjusting means (such as aperture regulation membrane valve, frequency converter, aperture regulation air door, the feed liquid pump housing), i.e., returned using single PID Road control all the way the energy (liquid feeding, steam or hot blast rate) number, so as to control the quality index of one outlet material.
By partial domestic scraper plate steam stalk machine exemplified by, in equipment wherein all the way steam pid loop control be steam membrane valve, And equipment steam-return line generally uses the control mode of steam pressure feedback control steam film valve opening, the PID feedback loop Belong to single PID closed loops control, can not be direct in the production phase although relatively stable in preheating and production phase control Participate in the control of this important indicator of outlet temperature.And partial domestic machine is improved to outlet temperature feedback control steam membrane valve The control mode of aperture, although way preferably solves the problems, such as that outlet temperature fluctuation is big in production, preheats in production Stage film valve opening is by the way of manual definite value, therefore the improved model be easy to cause material top " low temperature " or " overly moist " Phenomenon.
So for the growing Precise control requirement of technology for making tobacco threds, single pid loop controls an adjusting means Model can not preferably meet equipment each operation phase can Precise control requirement.
Goal of the invention content
To solve the above-mentioned problems, the goal of the invention of type of the present invention is to provide a kind of multichannel suitable for throwing smoke machine PID control method for automatically switching, can be automatic for an adjusting means according to the different operating statuses of throwing cartridge type process equipment Make choice, switch from multichannel pid loop, to realize that throwing smoke machine stablizes steady, accurate automatically controlling without hysteresis.
In order to realize above-mentioned purpose, type of the present invention employs following technical solution：
A kind of multichannel PID control method for automatically switching suitable for throwing smoke machine, the system that this method uses include first Pid loop, the second pid loop, the 3rd pid loop, adjusting means, PID switching selectors and PID switching transient programs；It is more A pid loop controls same adjusting means, and multiple pid loops are between each other independently, each to return without correlation Road each selects different setting value SP and process values PV to combine；PID switches selector then according to the distinct device operation phase Major control quality index, automatically selects using different pid loops, passes through different setting value SP and process values PV combination meters CV values are calculated so as to control the adjusting means；PID switching transient programs are then to ensure that controlling value CV is put down in pid loop switching moment Steady gradual program code segments；This method comprises the following steps：
1) when equipment brings into operation, it is first determined whether meeting the first PID switching selector switching conditions, held if meeting The first pid loop of row controls, and passes through setting value SP1With process values PV1Combination, calculate CV1It is worth direct-control regulator part； At the same time during this period, CV in reasonable control range is calculated by accumulator and dividing module all the time1Average value；
2) when the 2nd PID switching selector switching conditions meet, PID switching transient programs are performed, by the first pid loop CV in the reasonable control range calculated during execution1Average value is assigned to adjusting means, and for 10 seconds；Then second is activated Pid loop, calculates CV in real time2Value；Then the CV the second pid loop of activation calculated2Adjuster is assigned to by formula Part, and it is for 20 seconds, and definite value formula is adjusting means definite value=CV1*K1+CV2*K2, wherein K1+K2=1；Wherein K1、K2For two Model scale weight coefficient, draws according to multiple commissioning experience in kind；Then the control of the second pid loop is performed, passes through setting value SP2With process values PV2Combination, calculate CV2It is worth direct-control regulator part；At the same time during this period, all the time by accumulator and Dividing module calculates CV in reasonable control range2Average value；
3) when the 3rd PID switching selector other switching conditions meet, PID switching transient programs are performed, by the 2nd PID CV in the reasonable control range that circuit calculates when performing2Average value is assigned to adjusting means, and for 10 seconds；Then is activated Three pid loops, calculate CV in real time3Value；Then the CV the 3rd pid loop of activation calculated3Adjusting is assigned to by formula Device, and it is for 20 seconds, and definite value formula is adjusting means definite value=CV2*K2+CV3*K3, wherein K2+K3=1；Wherein K2、K3For two A model scale weight coefficient, draws according to multiple commissioning experience in kind；Then the control of the 3rd pid loop is performed, passes through setting Value SP3With process values PV3Combination, calculate CV3It is worth direct-control regulator part；At the same time during this period, accumulator is passed through all the time CV in reasonable control range is calculated with dividing module3Average value；
4) with equipment difference operating status, PID switching selectors select different pid loops to switch over, before switching One pid loop CV first more than transient programformerAverage value progress setting control is simultaneously for 10 seconds；Then activate next The pid loop that uses simultaneously calculates CVnestValue；Then the CV pid loop of activation calculatednestAdjusting is assigned to by formula Device, and it is for 20 seconds, and definite value formula is adjusting means definite value=CVformer*Kformer+CVnest*Knest, wherein Kformer+Knest =1.Then, next pid loop control is performed, passes through setting value SPnestWith process values PVnestCombination, calculate CVnest It is worth direct-control regulator part；At the same time during this period, calculated all the time by accumulator and dividing module in reasonable control range CVnestAverage value；
5) according to above-mentioned pid loop handoff procedure, until production terminates, adjusting means is closed.
Certainly the method for the present invention is not limited to 3 pid loops, can be the pid loop of 3 or more than 3, more than 3 Pid loop control method and above-mentioned identical, simply increase one or more pid loops.Multiple pid loops of type of the present invention Although control is same adjusting means, between each other independently, without correlation, each circuit is each free Combined with different setting value SP and process values PV.PID switches selector then according to the major control of distinct device operation phase Quality index, automatically selects using different pid loops, and CV values are calculated by different setting value SP and process values PV combinations So as to control the adjusting means, to meet the purpose of the different operation phase master control quality index of Precise control.PID switches transition Program is then that the steady gradual program code segments of controlling value CV are ensured in pid loop switching moment, in order to avoids PID from cutting Difference when changing between two PID model controlling value CV is excessive and causes the fluctuation of major control quality index excessive.
Type of the present invention eliminates single circuit PID control hysteresis quality, reduce human intervention not in time, the factor such as inaccurate Influence；Type of the present invention automatically selects pid loop in the equipment different operation phase, realizes different phase differentiated, becomes more meticulous Control function, improves the control ability of smoke machine equipment master control quality index, stabilizes outlet material fluctuation range；Simultaneously because PID switching transient programs are selected, ensure that and switch the steady gradual change of moment master control quality index in pid loop.
Brief description of the drawings
Fig. 1 is that the Controlling model of type of the present invention forms figure.
Fig. 2 is the Controlling model program flow diagram of type of the present invention.
Embodiment
The embodiment of type of the present invention is made a detailed explanation below in conjunction with the accompanying drawings.
A kind of multichannel PID control method for automatically switching suitable for throwing smoke machine as shown in Figure 1, including the first PID are returned Road 1, the second pid loop 2, the 3rd the 3rd pid loop 3, adjusting means 4, PID switching selectors 5 and PID switching transient programs 6.Although multiple pid loops control of type of the present invention is same adjusting means, between each other independently, do not have There is correlation, each circuit each selects different setting value SP and process values PV to combine.PID switchings selector 5 is not then according to With the major control quality index of equipment operation phase, automatically select using different pid loops, pass through different setting value SP CV values are calculated so as to control the adjusting means 4 with process values PV combinations, to meet the different operation phase master controls of Precise control The purpose of quality index.PID switching transient programs 6 are then that the steady gradual journeys of controlling value CV are ensured in pid loop switching moment Sequence code segment, in order to which difference when avoiding the PID from switching between two PID model controlling value CV is excessive and causes major control Quality index fluctuation is excessive.
As shown in Fig. 2, when equipment brings into operation, it is first determined whether meeting the first PID switching selector switching conditions, such as Satisfaction then performs the first pid loop 1 and controls, and by the combination of setting value SP1 and process values PV1, calculates CV1 values and directly controls Adjusting means；At the same time during this period, CV1 average values in reasonable control range are calculated by accumulator and dividing module all the time.
When the 2nd PID switching selector switching conditions meet, PID switching transient programs are performed, by the first pid loop 1 CV1 average values are assigned to adjusting means in the reasonable control range calculated during execution, and for 10 seconds；Then PID2 is activated, Calculate CV2 values in real time；Then the CV2 that the second pid loop 2 of activation calculates is assigned to adjusting means by formula, and For 20 seconds, definite value formula is adjusting means definite value=CV1*K1+CV2*K2, wherein K1+K2=1.Wherein K1, K2 are two moulds Type proportional roles coefficient, draws according to multiple commissioning experience in kind.Then perform the second pid loop 2 to control, pass through setting value The combination of SP2 and process values PV2, calculate CV2 value direct-control regulator parts；At the same time during this period, accumulator is passed through all the time CV2 average values in reasonable control range are calculated with dividing module.
When the 3rd PID, which switches selection switching condition, to be met, PID switching transient programs are performed, the second pid loop 2 is held CV2 average values are assigned to adjusting means in the reasonable control range calculated during row, and for 10 seconds；Then PID3 is activated, it is real When calculate CV3 values；Then the CV3 that the 3rd pid loop 3 of activation calculates is assigned to adjusting means by formula, and held 20 seconds continuous, definite value formula is adjusting means definite value=CV2*K2+CV3*K3, wherein K2+K3=1.Wherein K2, K3 are two models Proportional roles coefficient, draws according to multiple commissioning experience in kind.Then perform the 3rd pid loop 3 to control, pass through setting value SP3 With the combination of process values PV3, CV3 value direct-control regulator parts are calculated；At the same time during this period, by accumulator and remove all the time Method module calculates CV3 average values in reasonable control range.
With equipment difference operating status, PID switching selectors select different pid loops to switch over, first before switching More than first transient program one pid loop CVformer average values progress setting control is simultaneously for 10 seconds；Then activate next The pid loop that uses simultaneously calculates CVnest values；Then the CVnest pid loop of activation calculated is assigned to tune by formula Device is saved, and it is for 20 seconds, and definite value formula is adjusting means definite value=CVformer*Kformer+CVnest*Knest, wherein Kformer+Knest=1.Then, next pid loop control is performed, passes through setting value SPnest's and process values PVnest Combination, calculates CVnest value direct-control regulator parts；At the same time during this period, calculated all the time by accumulator and dividing module Go out CVnest average values in reasonable control range.
According to above-mentioned pid loop handoff procedure, until production terminates, adjusting means is closed.
The foregoing is merely the preferred embodiment of type of the present invention, all impartial changes made according to type claim of the present invention Change and modify, should all belong to the covering scope of type patent of the present invention.The use scope of type of the present invention is not only limited to tobacco cutting control Control equipment, can be applied to daily life and other industrial similar fields.

Claims (1)

  1. A kind of 1. multichannel PID control method for automatically switching suitable for throwing smoke machine, it is characterised in that the system that this method uses Including the first pid loop, the second pid loop, the 3rd pid loop, adjusting means, PID switching selectors and PID switching transition Program；Multiple pid loops control same adjusting means, multiple pid loops between each other independently, without correlation Property, each circuit each selects different setting value SP and process values PV to combine；PID switching selectors are then transported according to distinct device The major control quality index of row order section, automatically selects using different pid loops, passes through different setting value SP and process values PV combinations calculate CV values so as to control the adjusting means；PID switching transient programs are then to ensure to control in pid loop switching moment The steady gradual program code segments of value CV processed；This method comprises the following steps：
    1) when equipment brings into operation, it is first determined whether meeting the first PID switching selector switching conditions, the is performed if satisfaction One pid loop controls, and passes through setting value SP1With process values PV1Combination, calculate CV1It is worth direct-control regulator part；At the same time During this period, CV in reasonable control range is calculated by accumulator and dividing module all the time1Average value；
    2) when the 2nd PID switching selector switching conditions meet, PID switching transient programs is performed, the first pid loop is performed When the reasonable control range that calculates in CV1Average value is assigned to adjusting means, and for 10 seconds；Then the 2nd PID is activated to return Road, calculates CV in real time2Value；Then the CV the second pid loop of activation calculated2Adjusting means is assigned to by formula, and For 20 seconds, definite value formula is adjusting means definite value=CV1*K1+CV2*K2, wherein K1+K2=1；Wherein K1、K2For two models Proportional roles coefficient, draws according to multiple commissioning experience in kind；Then the control of the second pid loop is performed, passes through setting value SP2With Process values PV2Combination, calculate CV2It is worth direct-control regulator part；At the same time during this period, accumulator and division are passed through all the time Module calculates CV in reasonable control range2Average value；
    3) when the 3rd PID switching selector switching conditions meet, PID switching transient programs is performed, the second pid loop is performed When the reasonable control range that calculates in CV2Average value is assigned to adjusting means, and for 10 seconds；Then the 3rd PID is activated to return Road, calculates CV in real time3Value；Then the CV the 3rd pid loop of activation calculated3Adjusting means is assigned to by formula, and For 20 seconds, definite value formula is adjusting means definite value=CV2*K2+CV3*K3, wherein K2+K3=1；Wherein K2、K3For two models Proportional roles coefficient, draws according to multiple commissioning experience in kind；Then the control of the 3rd pid loop is performed, passes through setting value SP3With Process values PV3Combination, calculate CV3It is worth direct-control regulator part；At the same time during this period, accumulator and division are passed through all the time Module calculates CV in reasonable control range3Average value；
    4) as equipment difference operating status, PID switching selectors select different pid loops to switch over, before switching first More than transient program one pid loop CVformerAverage value progress setting control is simultaneously for 10 seconds；Then next use is activated Pid loop and calculate CVnestValue；Then the CV pid loop of activation calculatednestAdjusting means is assigned to by formula, And it is for 20 seconds, definite value formula is adjusting means definite value=CVformer*Kformer+CVnest*Knest, wherein Kformer+Knest=1. Then, next pid loop control is performed, passes through setting value SPnestWith process values PVnestCombination, calculate CVnestValue is straight Connect control and regulation device；At the same time during this period, CV in reasonable control range is calculated by accumulator and dividing module all the timenest Average value；
    5) according to above-mentioned pid loop handoff procedure, until production terminates, adjusting means is closed.
CN201711154711.4A 2017-11-20 2017-11-20 A kind of multichannel PID control method for automatically switching suitable for throwing smoke machine Pending CN107969727A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109782826A (en) * 2019-01-14 2019-05-21 浙江中烟工业有限责任公司 A kind of difunctional cleaning water thermostat suitable for water terrier wash machine
CN114244735A (en) * 2021-12-09 2022-03-25 南京丰道电力科技有限公司 Main/standby operation switching method and device and storage medium

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CN106970636A (en) * 2017-05-17 2017-07-21 北京理工大学 A kind of control system and its control method for being used to control aircraft speed
CN107272413A (en) * 2017-07-19 2017-10-20 华北电力大学（保定） A kind of multi-model Adaptive Control method for denitration control system

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CN1434376A (en) * 2002-01-25 2003-08-06 株式会社山武 Regulator with PID selection function
CN201569881U (en) * 2009-10-30 2010-09-01 武汉钢铁(集团)公司 PID (Proportional-Integral-Differential) control adjusting device of multi-parameter multi-closed loop circuit
CN102183890A (en) * 2011-03-16 2011-09-14 东南大学 Method for optimizing and setting regulator parameters of coordinated control system
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Publication number Priority date Publication date Assignee Title
CN109782826A (en) * 2019-01-14 2019-05-21 浙江中烟工业有限责任公司 A kind of difunctional cleaning water thermostat suitable for water terrier wash machine
CN114244735A (en) * 2021-12-09 2022-03-25 南京丰道电力科技有限公司 Main/standby operation switching method and device and storage medium
CN114244735B (en) * 2021-12-09 2024-01-16 南京丰道电力科技有限公司 Master and slave operation switching method, device and storage medium

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