CN107542708A - Hydraulic power unit energy-conservation Fuzzy control system and method - Google Patents
Hydraulic power unit energy-conservation Fuzzy control system and method Download PDFInfo
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- CN107542708A CN107542708A CN201710886989.4A CN201710886989A CN107542708A CN 107542708 A CN107542708 A CN 107542708A CN 201710886989 A CN201710886989 A CN 201710886989A CN 107542708 A CN107542708 A CN 107542708A
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Abstract
The invention discloses a kind of hydraulic power unit energy-conservation Fuzzy control system and method, including：Pressure sensor signal acquisition circuit, PLC control circuits, power supply circuit and the program composition being fixed in PLC chip.It is as follows comprising step：1）The relevant voltage signal that pressure sensor circuit output converts through voltage collection circuit, the A/D change-over circuits for being conveyed to PLC chip become digital quantity, whether preset requirement is reached by the pressure judged compared with default voltage in accumulator group, PLC chip draws the deviation and voltage deviation rate of change of voltage；2）PLC by obtained voltage deviation and voltage deviation rate calculates corresponding control signal according to fuzzy algorithmic approach and frequency converter output frequency corresponding to being converted into, and the rotating speed of variable-frequency motor is controlled through frequency converter, so as to realize the control to accumulator group inner fluid pressure.Wherein fuzzy algorithmic approach includes：The blurring of pressure sensor input voltage value, fuzzy control rule, the sharpening of fuzzy control quantity.The present invention can make hydraulic power unit control easy, Stress control best results, the characteristics of being well adapted for its work non-linear hour, polytropy and complexity.
Description
Technical field:
The present invention relates to a kind of hydraulic power unit energy-conservation Fuzzy control system and method.
Technical background：
With the continuous expansion of enterprise's hydraulic station, the capacity of required hydraulic power unit also becomes big, corresponding Electric Machine at Pumping Station continuous
Power consumption is also more and more.But during hydraulic station use, the situation for really needing hydraulic power unit offer pressure is not to account for institute
There is the working time, so motor has certain unloaded waste.
Some hydraulic power unit reducing energy consumption projects are the increase accumulator groups in hydraulic system on the market at present, first by motor
Pressurizeed in toward accumulator group, when being that pressure in accumulator group reaches pressure needed for work, provide pressure to hydraulic pipeline, work as work
When pressure is not needed during work, accumulator group can self-sustaining pressure, so as to close motor, save power consumption.
But the above method is due to the non-linear of hydraulic system, complexity and polygon so that control difficulty is larger, exists
Very big hysteresis quality.The present invention uses FUZZY ALGORITHMS FOR CONTROL so that faster, control effect real-time is big greatly for control response speed
By force, the stability of hydraulic system is strengthened while energy-conservation.
The content of the invention：
Present invention the shortcomings that being directed to control method described above, using pressure value in the accumulator of collection as judging whether pressure reaches
To desired foundation, using FUZZY ALGORITHMS FOR CONTROL, field experience and experimental data are integrated into controller, realize hydraulic power unit
Intelligent control.With control simplicity, the complicated state being well adapted for when hydraulic power unit works simultaneously obtains good energy-conservation effect
Fruit.
The purpose of the present invention is mainly achieved through the following technical solutions：
In the present invention, pressure sensor signal voltage collection circuit obtains corresponding voltage signal, is conveyed to PLC chip and becomes several
Word amount, by judging the pressure size in current accumulator group compared with default voltage, PLC chip draws voltage
Deviation and voltage deviation rate of change；
In the present invention, PLC calculates corresponding control signal simultaneously by obtained voltage deviation and voltage deviation rate according to fuzzy algorithmic approach
Frequency converter output frequency, is conveyed to frequency converter corresponding to being converted into, the variable-frequency motor rotating speed connected through Frequency Converter Control, so as to
Realize the control to hydraulic system.
Brief description of the drawings：
Accompanying drawing 1 is the systematic schematic diagram of the present invention
Accompanying drawing 2 is the FUZZY ALGORITHMS FOR CONTROL flow chart of the present invention
Embodiment：
Hydraulic power unit energy-conservation Fuzzy control system and control method is discussed in detail with reference to accompanying drawing.
As depicted in figs. 1 and 2：Pressure sensor signal acquisition circuit（1）The pressure signal that detection is obtained in accumulator turns
The voltage signal changed into and PLC control circuits（2）It is connected, PLC control circuits（2）With frequency converter（3）It is connected, frequency converter（3）With
Oil pump variable-frequency motor connects together, power supply circuit（5）With PLC control circuits（2）It is connected, PLC control circuits（2）By solid
The FUZZY ALGORITHMS FOR CONTROL being scheduled in PLC chip（4）The rotating speed of oil pump variable-frequency motor is obtained, through frequency converter（3）Frequency corresponding to output
Rate controls variable-frequency motor.
As shown in Figure 2：PLC is compared the given voltage value when magnitude of voltage detected and the Optimum Economic obtained before
Compared with；Obtained from corresponding voltage deviation e andVoltage deviation rate ec is obtained, voltage deviation and voltage deviation rate are entered
Row Fuzzy processing.According to actual electric field experimental data and fuzzy algorithmic approach requirement, three fuzzy subsets are set to voltage deviation e
For：Pressure divergence is big, pressure divergence is moderate, pressure divergence is small, voltage deviation rate ec is set three fuzzy subsets as：Pressure becomes
Change is fast, pressure change is moderate, pressure change is small.The output variable v of fuzzy algorithmic approach is set five fuzzy subsets as：Rotating speed is quick
Increase, rotating speed is slowly increased, rotating speed is constant, rotating speed slowly declines, rotating speed rapid decrease.
Show that fuzzy control rule is according to field experience and experimental data：
1. if the voltage ratio setting voltage that detection obtains is low, illustrates that the pressure ratio set pressure in accumulator group is small, perform
The output subset of fuzzy controller is：Rotating speed quickly increases；
2. if the voltage that detection obtains is equal with setting voltage, voltage deviation rate is moderate, then illustrates the pressure in accumulator group
Meet setting pressure, the output subset for performing fuzzy controller is：Rotating speed is constant；
3. if the voltage ratio setting voltage that detection obtains is high, illustrates that the pressure ratio set pressure in accumulator group is big, perform
The output subset of fuzzy controller is：Rotating speed rapid decrease；
4. if detect, obtained voltage is equal with setting voltage but the change of voltage deviation rate is slow, performs the defeated of fuzzy controller
Going out subset is：Rotating speed is slowly increased；
5. if detect, obtained voltage is equal with setting voltage but the change of voltage deviation rate is fast, performs fuzzy controller
Exporting subset is：Rotating speed slowly declines.
According to fuzzy rule, for the pressure value situation in different accumulators, different frequency conversions is exported by PLC controls
Motor speed, so as to realize the stability for ensureing hydraulic system and optimal energy-conservation.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, it is included within the scope of the present invention.
Claims (4)
- A kind of 1. hydraulic power unit energy-conservation Fuzzy control system, it is characterised in that：Including pressure sensor signal acquisition circuit （1）, PLC control circuits（2）, frequency converter（3）, the FUZZY ALGORITHMS FOR CONTROL that is fixed in PLC（4）And power supply circuit（5）Group Into pressure sensor signal acquisition circuit（1）Detection obtains the voltage signal that the pressure signal in accumulator is converted into and controlled with PLC Circuit processed（2）It is connected, PLC control circuits（2）With frequency converter（3）It is connected, frequency converter（3）Connected together with oil pump variable-frequency motor, Power supply circuit（5）With PLC control circuits（2）It is connected, PLC control circuits（2）Pass through the Fuzzy Control being fixed in PLC chip Algorithm processed（4）Realize fuzzy control.
- 2. hydraulic power unit energy-conservation Fuzzy control system according to claim 1, it is characterised in that：The pressure sensor Signal acquisition circuit（1）Including optical coupling isolation circuit.
- 3. hydraulic power unit energy-conservation Fuzzy control system according to claim 1, it is characterised in that：The PLC controls electricity Road（2）Used chip is Omron CP1E, the PLC control circuits（2）Corresponding peripheral circuit includes filtering amplitude limiter circuit.
- 4. a kind of hydraulic power unit using any one of the claim 1-3 hydraulic power unit energy-conservation Fuzzy control systems saves With fuzzy control method, it is characterised in that：The FUZZY ALGORITHMS FOR CONTROL being fixed in PLC（4）It is by data acquisition, fuzzy quantity Change processing, fuzzy reasoning, the sharpening of fuzzy quantity, the step such as the output composition of control signal, detailed process are as follows：1）Corresponding voltage signal is obtained through pressure sensor signal voltage collection circuit, PLC chip is conveyed to and becomes digital quantity, By judging the pressure size in current accumulator group compared with default voltage, PLC chip draws the inclined of voltage Difference and voltage deviation rate of change；2）PLC is calculated corresponding control signal according to fuzzy algorithmic approach by obtained voltage deviation and voltage deviation rate and is converted into pair The frequency converter output frequency answered, is conveyed to frequency converter, the variable-frequency motor rotating speed connected through Frequency Converter Control.
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| CN201710886989.4A CN107542708A (en) | 2017-09-27 | 2017-09-27 | Hydraulic power unit energy-conservation Fuzzy control system and method |
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| CN201710886989.4A CN107542708A (en) | 2017-09-27 | 2017-09-27 | Hydraulic power unit energy-conservation Fuzzy control system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004881A (en) * | 2018-09-21 | 2018-12-14 | 中国科学院电工研究所无锡分所 | Sewage treatment Boosting pumping station energy conservation fuzzy controller |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201865154U (en) * | 2010-10-12 | 2011-06-15 | 浙江工业职业技术学院 | Variable frequency and constant voltage intelligent water supply device of fuzzy self-adaption proportion-integration-differentiation (PID) control |
| CN204025093U (en) * | 2014-08-20 | 2014-12-17 | 中国石油化工股份有限公司 | A kind of submersible electric pump fuzzy control device |
| CN104819115A (en) * | 2015-04-08 | 2015-08-05 | 山东科技大学 | Digital control system of duplex axial variable displacement plunger pump |
-
2017
- 2017-09-27 CN CN201710886989.4A patent/CN107542708A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201865154U (en) * | 2010-10-12 | 2011-06-15 | 浙江工业职业技术学院 | Variable frequency and constant voltage intelligent water supply device of fuzzy self-adaption proportion-integration-differentiation (PID) control |
| CN204025093U (en) * | 2014-08-20 | 2014-12-17 | 中国石油化工股份有限公司 | A kind of submersible electric pump fuzzy control device |
| CN104819115A (en) * | 2015-04-08 | 2015-08-05 | 山东科技大学 | Digital control system of duplex axial variable displacement plunger pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004881A (en) * | 2018-09-21 | 2018-12-14 | 中国科学院电工研究所无锡分所 | Sewage treatment Boosting pumping station energy conservation fuzzy controller |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190902 Address after: 313000 East Side of Building 5, South Taihu Lake Kechuang Center, 1366 Hongfeng Road, Wuxing District, Huzhou City, Zhejiang Province Applicant after: Huzhou Smarten Technology Co., Ltd. Address before: Room 3006-3015, No. 1 Chuanghui Road, Huishan Economic Development Zone, Wuxi City, Jiangsu Province Applicant before: Wuxi branch of the Institute of electrical engineering, Academy of Sciences, Chinese Academy of Sciences |
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Application publication date: 20180105 |