CN114137824B - Method and system for controlling high-speed paying-off stability of small-pitch ADSS optical cable - Google Patents
Method and system for controlling high-speed paying-off stability of small-pitch ADSS optical cable Download PDFInfo
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- G—PHYSICS
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- 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
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Abstract
The invention relates to a method and a system for controlling the stability of high-speed paying-off of a small-pitch ADSS optical cable, comprising the following steps: detecting the diameter of a current pay-off reel; detecting the actual position of a dance wheel of the pay-off rack, and simultaneously detecting the actual pay-off speed of the production line; and establishing a three-element paying-off speed model of the relation among the actual position of the dance wheel, the actual paying-off speed of the production line and the paying-off motor speed, and obtaining the paying-off motor speed according to the control thought of the fuzzy PID so as to control the paying-off speed in real time. The automatic tray diameter detection device is designed, and different proportional coefficients are set for different current pay-off tray diameters to be used as synchronous coefficients. The paying-off system on the same production line can efficiently and automatically meet the flexible, continuous and stable production requirements of different types of disc diameters and different speeds, and has the advantages of simple structure, easy realization and strong adaptability to production sites.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a paying-off control technology.
Background
The ADSS optical cable is an all-dielectric self-supporting optical cable and is characterized in that a loose sleeve type structure is adopted, a cable core is of a layer twisting type, and an external protective sleeve has an electric corrosion prevention function.
The small-pitch ADSS optical cable has the advantages that the number of the sub-sleeves is changed greatly in the structure of the optical cable, the wall thickness of the sub-sleeves is thin, the tension requirement for paying off is high, and particularly for high-speed continuous production, if a plurality of production lines are arranged to adapt to different diameters, the flexible diversified production requirement cannot be met. Thus, the pay-off system on the same production line also needs to meet the flexibility requirements of different types of disc diameters and different speeds. And the manual work sets for different unwrapping wire speeds according to the disk diameter change of big reel, carries out the different tension control of unwrapping wire in-process, and then inefficiency is very, and because tension control is unreasonable still causes broken wire or card line easily, is unfavorable for serialization high-speed production.
Disclosure of Invention
Aiming at the high-speed paying-off stability requirement of the small-pitch ADSS optical cable, the invention provides the high-speed paying-off stability control method and system for the small-pitch ADSS optical cable, and the paying-off system on the same production line can efficiently and automatically meet the flexible, continuous and stable production requirements of different types of disc diameters and different speeds.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for controlling the stability of high-speed paying-off of a small-pitch ADSS optical cable is characterized by comprising the following steps:
step 1: detecting the diameter of a current pay-off reel;
step 2: detecting the actual position of a pay-off frame dance wheel while detecting the diameter of a current pay-off reel, and simultaneously detecting the actual pay-off speed of a production line;
step 3: and establishing a three-element paying-off speed model of the relation among the actual position of the dance wheel, the actual paying-off speed of the production line and the paying-off motor speed, and obtaining the paying-off motor speed according to the control thought of the fuzzy PID so as to control the paying-off speed in real time.
In the above technical scheme, in step 3, according to the actual position of the dance wheel and the preset position value, obtaining a difference value as the PID position of the dance wheel; based on the PID position of the dance wheel, the real paying-off speed of the production line and the paying-off motor speed, the paying-off motor speed is obtained according to the fuzzy PID control thought, so that the paying-off speed is controlled in real time.
In the above technical scheme, the three-element paying-off speed model is as follows: paying-off motor speed V Motor with a motor housing ＝K×V Wire (C) +V Dance wheel PID The method comprises the steps of carrying out a first treatment on the surface of the K is a synchronization coefficient, V Dance wheel PID PID position of dance wheel, V Wire (C) The actual paying-off speed of the production line is obtained.
In the technical scheme, different proportional coefficients are set for different current pay-off reel diameters to be used as synchronous coefficients.
In the above technical scheme, the fuzzy PID control rule of the current pay-off reel diameter and the proportionality coefficient Kp is as follows:
kp=0.15+±0.02 for diameter specification discs greater than 1.8 meters;
kp=0.2+±0.02 for diameter specification discs greater than 1.2 meters and less than 1.8 meters;
kp=0.3+±0.02 for discs of diameter specification less than 0.8 meters.
In the technical scheme, the current pay-off reel diameter is obtained through the reel diameter detection device.
In the technical scheme, the disc diameter detection device is obtained by an infrared detection device or a reflective photoelectric proximity switch.
A small-pitch ADSS cable high-speed payout stability control system, comprising:
the disc diameter detection device is used for acquiring the current diameter of the pay-off disc and transmitting the current diameter to the control PLC;
the dance wheel position detection device is used for detecting the actual position of the dance wheel of the pay-off rack and transmitting the actual position to the control PLC;
and the control PLC is used for inputting and storing preset position values of the dance wheel, obtaining a difference value as a PID position of the dance wheel according to the actual position and the preset position values of the dance wheel, and obtaining the paying-off motor speed according to a fuzzy PID control thought based on a three-element paying-off speed model of the PID position of the dance wheel, the actual paying-off speed of the production line and the paying-off motor speed so as to control the paying-off speed in real time.
In the technical scheme, the disc diameter detection device is an infrared detection device or a reflective photoelectric proximity switch sensor.
In the above technical scheme, the placement position of the disc diameter detection device is fixed according to the actual diameter of the pay-off disc, and each disc diameter detection device corresponds to a diameter specification.
The principle of the invention is as follows:
based on the requirement of stable control, the invention adds the automatic detection of the disc diameter and the control thought of the fuzzy PID in the paying-off system to construct a three-element paying-off speed model.
From the three-element pay-off speed model calculation formula, once the pay-off speed of the production line is stable, the output quantity of PID calculation has a great influence on the quality of control. Classical PID control requires tuning of appropriate relevant parameters, but there is a great difference in parameters corresponding to the diameters of the reels of the different pay-off systems. Therefore, the PID parameters corresponding to different disc diameters are obtained through setting and experiments by a fuzzy algorithm method. And then the control signal is used for controlling the speed control system through the hardware of the PLC.
A disc diameter automatic detection device is designed, and when the disc diameter detection device detects the currently used disc diameter, a signal is transmitted to a control PLC. Meanwhile, a position signal of the pay-off rack dance wheel and a speed signal of the production line are detected and transmitted to the PLC. The control system adopts a fuzzy PID control idea inside to obtain proper paying-off speed control quantity, and the variable frequency transmission system is controlled through real-time linear processing to finish accurate speed control, the fluctuation range of the dance wheel is within 15 cm, and the process requirement is met.
And setting three sets of PID parameters according to different disc diameters, modifying related operation parameters by a control system corresponding to the different PID parameters, and operating and controlling a speed control system to finish required operation.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the on-site process characteristics, a three-element paying-off speed model is creatively provided, and based on the PID position of a dance wheel, the actual paying-off speed of a production line and the three-element paying-off speed model of the paying-off motor speed, the paying-off motor speed is obtained according to a fuzzy PID control thought, so that real-time control is carried out on the paying-off speed. Compared with the traditional classical pay-off motor speed PID control based on the pay-off speed, the control efficiency and the control precision are greatly improved, and stable control of the pay-off system can be realized.
2. According to the fuzzy PID control thought, three sets of PID parameters are set according to different disc diameters, PID parameters are automatically matched corresponding to the different disc diameters, and stable control of the paying-off system is achieved.
3. The characteristics of an infrared device or other proximity switches are utilized to automatically detect the diameters of the related pay-off reels, and the method is suitable for flexible automatic production speed control.
Drawings
FIG. 1 is a flow chart of a control method of the present invention.
Detailed Description
The high-speed paying-off stability control system for the small-pitch ADSS optical cable is characterized by comprising the following components:
the disc diameter infrared detection device or other photoelectric proximity switches can be used for acquiring the current diameter of the paying-off disc and transmitting the current diameter to the control PLC;
the dance wheel position detection device is used for detecting the actual position of the dance wheel of the pay-off rack and transmitting the actual position to the control PLC; dance round is the dance round of general regulation, can adopt dance round self position detection device, also can adopt conventional position detection mechanism like laser rangefinder such as mode acquisition such as infrared rangefinder.
And the control PLC is used for inputting and storing preset position values of the dance wheel, obtaining a difference value as a PID position of the dance wheel according to the actual position and the preset position values of the dance wheel, and obtaining the paying-off motor speed according to a fuzzy PID control thought based on a three-element paying-off speed model of the PID position of the dance wheel, the actual paying-off speed of the production line and the paying-off motor speed so as to control the paying-off speed in real time.
Automatic detection device of key part disk diameter: the pay-off reel diameter is judged no matter how the automatic detection of the reel diameter is used. The position of the sensor can be adjusted according to the actual diameter, and the disc diameter is divided into 3 specifications of 180 cm, 120 cm and 800 cm.
The control method flow chart is shown in fig. 1. Step 1: detecting the diameter of a current pay-off reel and sending the diameter parameters to a control PLC; step 2: detecting the actual position of a pay-off frame dance wheel while detecting the diameter of a current pay-off reel, and simultaneously detecting the actual pay-off speed of a production line; step 3: and establishing a three-element paying-off speed model of the relation among the actual position of the dance wheel, the actual paying-off speed of the production line and the paying-off motor speed, and obtaining the paying-off motor speed according to the control thought of the fuzzy PID so as to control the paying-off speed in real time.
The three-element paying-off speed model is as follows: paying-off motor speed V Motor with a motor housing ＝K×V Wire (C) +V Dance wheel PID The method comprises the steps of carrying out a first treatment on the surface of the K is a synchronization coefficient, V Dance wheel PID PID position of dance wheel, V Wire (C) The actual paying-off speed of the production line is obtained.
And the control PLC is used for inputting and storing preset position values of the dance wheel, and obtaining a difference value as the PID position of the dance wheel according to the actual position of the dance wheel and the preset position values.
Dance wheel position deviation value = dance wheel position set value-dance wheel actual position: e (t) =r (t) -c (t);
V dance wheel PID Control law:
transfer function
Wherein Kp is a proportionality coefficient, T i Is an integration time constant, T d A differential time constant;integration coefficient, K d ＝K P *T d Differential coefficient.
And setting three sets of PID parameters according to different disc diameters, modifying related operation parameters by a control system according to the different PID parameters, and operating and controlling a speed control system to finish required operation.
In order to meet the requirement that paying-off can be stable under the condition of different paying-off reel diameters, we experiment aiming at the different paying-off reel diameters, different proportionality coefficients Kp are set, and integral and differential coefficients are maintained.
Kp=0.15+±0.02 for diameter specification discs greater than 1.8 meters;
kp=0.2+±0.02 for diameter specification discs greater than 1.2 meters and less than 1.8 meters;
kp=0.3+±0.02 for discs of diameter specification less than 0.8 meters.
The diameter specification of the pay-off reel is obtained through detection by the infrared probe.
Examples:
detecting and obtaining a disc diameter of 1.6 m, a production line speed of 63.5 m/min, a dance wheel preset position value of 38, a dance wheel actual position of 35.7, an initial paying-off motor speed of 29.2%, a paying-off speed of 18.8 r/min, a paying-off motor of 23.7HZ and V Dance wheel PID The given value is 5% ± 0.5%.
Therefore, aiming at the cable type and equipment requirements, the control system adopts a fuzzy PID control idea inside to obtain proper paying-off speed control quantity, and the variable frequency transmission system is controlled through real-time linear processing to finish accurate speed control, the fluctuation range of the dance wheel is within 15 cm, and the process requirements are met.
Other embodiments are not described in detail, and all conventional modifications of the corresponding or related apparatus and methods, which can be obtained by simple transformation by those skilled in the art, are within the scope of the present invention.
Claims (8)
1. A method for controlling the stability of high-speed paying-off and high-tension of a small-pitch ADSS optical cable is characterized by comprising the following steps:
step 1: detecting the diameter of a current pay-off reel;
step 2: detecting the actual position of a pay-off frame dance wheel while detecting the diameter of a current pay-off reel, and simultaneously detecting the actual pay-off speed of a production line;
step 3: establishing a three-element paying-off speed model of the relation among the actual position of the dance wheel, the actual paying-off speed of the production line and the paying-off motor speed:
paying-off motor speed V Motor with a motor housing =K×V Wire (C) +V Dance wheel PID ；
K is a synchronization coefficient;
V dance wheel PID The PID position of the dance wheel is the difference between the actual position of the dance wheel and a preset position value;
V wire (C) The actual paying-off speed of the production line is set;
based on the PID position of the dance wheel, the real paying-off speed of the production line and the paying-off motor speed, the paying-off motor speed is obtained according to the fuzzy PID control thought, so that the paying-off speed is controlled in real time.
2. The method for controlling the stability of high-speed paying-off and high-tension of the small-pitch ADSS optical cable with multiple diameters according to claim 1, which is characterized in that different scaling factors are set for different current paying-off reel diameters to be used as synchronization factors.
3. The method for controlling the stability of the high-speed paying-off and high-tension of the small-pitch ADSS optical cable with multiple diameters according to claim 2 is characterized in that a fuzzy PID control rule of the current paying-off disc diameter and a proportionality coefficient Kp is as follows:
kp=0.15+±0.02 for diameter specification discs greater than 1.8 meters;
kp=0.2+±0.02 for diameter specification discs greater than 1.2 meters and less than 1.8 meters;
kp=0.3+±0.02 for discs of diameter specification less than 0.8 meters.
4. The method for controlling the high-speed paying-off and high-tension stability of the small-pitch ADSS optical cable with multiple diameters according to claim 1, wherein the current diameter of the paying-off disc is obtained through a disc diameter detection device.
5. The method for controlling the high-speed paying-off and high-tension stability of the small-pitch ADSS optical cable according to claim 4, wherein the disc diameter detection device is an infrared detection device or a reflective photoelectric proximity switch.
6. A small-pitch ADSS optical cable multi-reel high-speed paying-off high-tension stability control system is characterized by comprising:
the disc diameter detection device is used for acquiring the current diameter of the pay-off disc and transmitting the current diameter to the control PLC;
the dance wheel position detection device is used for detecting the actual position of the dance wheel of the pay-off rack and transmitting the actual position to the control PLC;
and the control PLC is used for inputting and storing preset position values of the dance wheel, obtaining a difference value as a PID position of the dance wheel according to the actual position and the preset position values of the dance wheel, and obtaining the paying-off motor speed according to a fuzzy PID control thought based on a three-element paying-off speed model of the PID position of the dance wheel, the actual paying-off speed of the production line and the paying-off motor speed so as to control the paying-off speed in real time.
7. The small-pitch ADSS cable multi-reel high-speed paying-off high-tension stability control system according to claim 6, wherein the reel diameter detection device is an infrared detection device or a reflective photoelectric proximity switch sensor.
8. The small-pitch ADSS cable multi-reel high-speed paying-out high-tension stability control system according to claim 6, wherein the placement positions of the reel diameter detecting devices are fixed according to the actual reel diameter, each of the reel diameter detecting devices corresponding to a diameter specification.
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