CN110824906B - Rapid setting circuit based on fuzzy control strategy - Google Patents

Rapid setting circuit based on fuzzy control strategy Download PDF

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Publication number
CN110824906B
CN110824906B CN201911190609.9A CN201911190609A CN110824906B CN 110824906 B CN110824906 B CN 110824906B CN 201911190609 A CN201911190609 A CN 201911190609A CN 110824906 B CN110824906 B CN 110824906B
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module
resistor
capacitor
fuzzy
adjustable
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CN110824906A (en
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周航
薛年喜
肖薇
耿束建
赵亮
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Beijing Bbef Science and Technology Co Ltd
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Beijing Bbef Science and Technology Co Ltd
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    • 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.

Abstract

The invention discloses a quick setting circuit based on a fuzzy control strategy, which comprises an input variable module, a fuzzy controller and an output variable module, wherein the input variable module is a set voltage value; the fuzzy controller converts a set voltage value into a fuzzy quantity, converts the obtained fuzzy control quantity into an accurate control quantity through a fuzzy algorithm, and comprises a measuring module, four fuzzy control modules, a first F-PID control circuit for power stable output control, a second F-PID control circuit for protecting a first signal, a third F-PID control circuit for protecting a second signal and a fourth F-PID control circuit for protecting a third signal, wherein each fuzzy control module is provided with on-off control; the output variable module comprises a power amplifier module and a power output module connected with the power amplifier module in series, and the measuring module measures the output power of the power amplifier module and feeds back a voltage signal to the first F-PID control circuit. And the PID parameter range is quickly determined, and the setting time is reduced.

Description

Rapid setting circuit based on fuzzy control strategy
Technical Field
The invention belongs to the technical field of radio, and particularly relates to a quick setting circuit based on a fuzzy control strategy.
Background
The PID (proportion-integral-derivative) control algorithm is a control algorithm with simple structure, reliable work and convenient adjustment, is one of the most main control methods for controlling various industrial processes, and when the PID control is used, the parameters of the PID need to be adjusted, and the process is called setting. In a control circuit of a radio frequency generator, a PID (proportion integration differentiation) hardware closed-loop control mode is adopted for power output, meanwhile, in order to ensure the reliability of a power output process, a plurality of PID control loops are adopted for cooperative control in the control loops, different PID control loops realize the functions of current protection, voltage protection, high-temperature protection and the like, but because the response time of different protection circuits is different, the proportional, integral and differential parameters of each loop are different, and the setting time is longer. Fuzzy control is commonly used in complex control systems, the complex control systems often have more variables and are difficult to correctly describe the dynamics of the systems, and for loops with a plurality of PID controls, the workload of debugging can be greatly reduced by using a fuzzy control strategy.
The fuzzy control is essentially a nonlinear control, and the main difficulty is that a large amount of debugging backgrounds need to be accumulated based on the original system control method, and the debugging results are arranged into a fuzzy control rule base, wherein the rule base is the core of the fuzzy control, so that the method has the defect that the method is not suitable for personnel who debug for the first time or do not debug the backgrounds.
At present, the PID technology is widely applied to various fields of industrial control, and a control system based on fuzzy control is widely applied to the production and living fields, such as water purification treatment, chemical reaction kettles, fermentation processes and the like in the industrial control field, washing machines, air conditioners and the like in household appliances, automobile driving, a subway parking system of a robot control box and the like in a special system. Debugging for complex circuits involves multivariable cooperative control, which is an advantage of fuzzy control.
Disclosure of Invention
The invention aims to solve the problem, and provides a rapid setting circuit based on a fuzzy control strategy based on debugging of a radio frequency power supply control circuit, wherein the circuit is a complete hardware closed-loop circuit, and a PID parameter range can be rapidly determined according to a rule base of fuzzy control. Meanwhile, the setting time is reduced by reducing the replacement times of components.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a quick setting circuit based on a fuzzy control strategy comprises an input variable module, a fuzzy controller and an output variable module, and is characterized in that the input variable module is a set voltage value; the fuzzy controller converts a set voltage value into a fuzzy quantity, converts the obtained fuzzy control quantity into an accurate control quantity through a fuzzy algorithm, and comprises a measuring module 6 and four fuzzy control modules, wherein the four fuzzy control modules are respectively a first F-PID control circuit 1 for power stable output control, a second F-PID control circuit 2 for protecting a first signal and connected with the first F-PID control circuit in series, a third F-PID control circuit 3 for protecting a second signal and a fourth F-PID control circuit 4 for protecting a third signal and connected with the third F-PID control circuit in parallel, and each fuzzy control module is provided with a switch control 5; the output variable module comprises a power amplifier module 7 and a power output module 8 connected with the power amplifier module in series, and the measuring module 6 measures the output power of the power amplifier module and feeds back a voltage signal to the first F-PID control circuit 1.
Preferably, the fuzzy control module comprises a control module and an operational amplifier U1, wherein one input end of the operational amplifier U1 is connected with an isolation resistor R, and one end of the isolation resistor R is the second input end of the fuzzy control module; the other input end of the operational amplifier U1 is connected with a resistor RX2, and the resistor RX2 is connected with a capacitor CX1 in series and then is connected with an input end of a fuzzy control module; the output end of the operational amplifier U1 is connected with the output of the fuzzy control module; the resistor RX2 and the capacitor CX1 are connected with the adjustable resistor module RX3 in parallel, the adjustable resistor module RX4 and the adjustable capacitor module CX3 are connected in series and then connected with the capacitor CX2 in parallel, and two ends of the capacitor CX2 are respectively connected to the input end of the operational amplifier U1 connected with the resistor RX2 and the output end of the operational amplifier U1; the adjustable resistance module RX3 and the adjustable resistance module RX4 are proportional control parts, the adjustable capacitance module CX3 and the adjustable resistance module RX3 are integral control parts, and the capacitance CX1, the resistance RX2, the adjustable resistance module RX4 and the capacitance CX2 are differential control parts.
Preferably, the adjustable resistance module comprises a resistor R1, a resistor R2 and an adjustable resistor RES which are sequentially connected in series, the resistor R1 is connected with a switch S3 in parallel, the resistor R2 is connected with a switch S4 in parallel, after the resistor R3 is connected with the switch S2 in series, one end of the resistor R1 is connected with the left side of the resistor R1, and the other end of the resistor R3 is connected with the right side of the adjustable resistor RES; after the resistor R4 is connected with the switch S1 in series, one end of the resistor R1 is connected to the left side of the resistor R1, and the other end of the resistor R4 is connected to the right side of the adjustable resistor RES.
Preferably, the adjustable capacitor module comprises a capacitor C1, a capacitor C2 and an adjustable capacitor CES which are sequentially connected in series, the capacitor C1 is connected in parallel with a switch S3, the capacitor C2 is connected in parallel with a switch S4, after the capacitor C3 is connected in series with the switch S2, one end of the capacitor C1 is connected to the left side of the capacitor C3, and the other end of the capacitor C3 is connected to the right side of the adjustable capacitor CES; after the capacitor C4 and the switch S1 are connected in series, one end of the capacitor C1 is connected to the left side of the capacitor C1, and the other end of the capacitor C1 is connected to the right side of the adjustable capacitor REC.
Compared with the prior art, the invention has the beneficial effects that:
the circuit of the invention is only a part, the whole system comprises a main control circuit, a plurality of series-parallel auxiliary control circuits and the like, the setting of a plurality of different control circuits using the same fuzzy control module is basically consistent with the rule base corresponding to the fuzzy control module, and if a part of PID control functions are used, or the position and the number of the adjustable resistor and the adjustable capacitor in the fuzzy control module are changed, a new corresponding rule base is provided.
The invention has two parts, namely a PID control circuit is quickly set by using a fuzzy control strategy, and a fuzzy rule base and a response time fuzzification method of the fuzzy control circuit are adopted. According to the rule base of the fuzzy control, the rough range of the PID parameters can be rapidly determined, the PID parameters do not need to be debugged one by one during cooperative adjustment, and debugging does not need to be carried out in the whole range of the adjustable component, so that the setting time is greatly reduced. Meanwhile, the setting time is reduced by reducing the replacement times of components.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a fast tuning circuit based on a fuzzy control strategy according to the present invention.
FIG. 2 is a schematic diagram and a simplified diagram of a fuzzy control module according to the present invention.
FIG. 3 is a schematic diagram and simplified diagram of an adjustable resistance module according to the present invention.
Fig. 4 is a schematic diagram and a simplified diagram of an adjustable capacitor module according to the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
The embodiment is shown in fig. 1-4, a fast setting circuit based on a fuzzy control strategy comprises an input variable module, a fuzzy controller and an output variable module, wherein the input variable module is a set voltage value; the fuzzy controller converts a set voltage value into a fuzzy quantity, converts the obtained fuzzy control quantity into an accurate control quantity through a fuzzy algorithm, is formed by connecting FPID 1-FPID 4 control modules in series or in parallel, and comprises a measuring module 6 and four fuzzy control modules, wherein the four fuzzy control modules are respectively a first F-PID control circuit 1 for power stable output control, a second F-PID control circuit 2 for protecting a first signal and connected with the first F-PID control circuit in series, a third F-PID control circuit 3 for protecting a second signal and a fourth F-PID control circuit 4 for protecting a third signal and connected with the third F-PID control circuit in parallel, and each fuzzy control module is provided with a CTRL (control value) switch control 5; each fuzzy control module realizes control, a plurality of protection functions and a quick setting function; the output variable module comprises a power amplifier module 7 and a power output module 8 connected with the power amplifier module in series, and the measuring module 6 measures the output power of the power amplifier module and feeds back a voltage signal to the first F-PID control circuit 1.
Preferably, the fuzzy control module comprises a control module and an operational amplifier U1, wherein one input end of the operational amplifier U1 is connected with an isolation resistor R, and one end of the isolation resistor R is an input two (IN _ 2) of the fuzzy control module; the other input end of the operational amplifier U1 is connected with a resistor RX2, and the resistor RX2 is connected with a first input (IN _ 1) of the fuzzy control module after being connected with a capacitor CX1 IN series; the output end of the operational amplifier U1 is connected with the Output (OUT) of the fuzzy control module; the resistor RX2 and the capacitor CX1 are connected with the adjustable resistor module RX3 in parallel, the adjustable resistor module RX4 and the adjustable capacitor module CX3 are connected in series and then connected with the capacitor CX2 in parallel, and two ends of the capacitor CX2 are respectively connected to the input end of the operational amplifier U1 connected with the resistor RX2 and the output end of the operational amplifier U1; the adjustable resistance module RX3 and the adjustable resistance module RX4 are proportional control parts, the adjustable capacitance module CX3 and the adjustable resistance module RX3 are integral control parts, and the capacitance CX1, the resistance RX2, the adjustable resistance module RX4 and the capacitance CX2 are differential control parts.
In the conventional PID adjustment, the variable resistance module RX3, the variable resistance module RX4, and the adjustable capacitance module CX3 are adjusted for input and output at different corresponding times, thereby completing parameter adjustment. In the actual setting process, the adjustment range of the resistor and the capacitor needs to be generally determined in the first step, the problem of insufficient resistance value and capacitance value of the resistor may occur in the subsequent setting process, and frequent replacement of the resistor and the capacitor increases the setting formula time and workload, and over-adjustment may be caused, so that the fault of the whole system is caused.
Preferably, the adjustable resistor module RX3 or RX4 includes a resistor R1, a resistor R2 and an adjustable resistor RES connected in series in sequence, the resistor R1 is connected in parallel with the switch S3, the resistor R2 is connected in parallel with the switch S4, after the resistor R3 is connected in series with the switch S2, one end of the resistor R1 is connected to the left side of the resistor R3, and the other end of the resistor R3 is connected to the right side of the adjustable resistor RES; after the resistor R4 is connected with the switch S1 in series, one end of the resistor R1 is connected with the left side of the resistor R1, and the other end of the resistor R4 is connected with the right side of the adjustable resistor RES.
Preferably, the adjustable capacitor module CX3 comprises a capacitor C1, a capacitor C2 and an adjustable capacitor CES which are sequentially connected in series, the capacitor C1 is connected in parallel with the switch S3, the capacitor C2 is connected in parallel with the switch S4, after the capacitor C3 is connected in series with the switch S2, one end of the capacitor C1 is connected to the left side of the capacitor C3, and the other end of the capacitor C3 is connected to the right side of the adjustable capacitor CES; after the capacitor C4 and the switch S1 are connected in series, one end of the capacitor C1 is connected with the left side of the capacitor C1, and the other end of the capacitor C is connected with the right side of the adjustable capacitor REC.
As shown in fig. 3 and 4, the adjustable resistor module and the adjustable capacitor module are respectively connected in series with two resistors and two capacitors based on the adjustable resistor and the adjustable capacitor, the resistance value of the series-parallel resistor is consistent with the maximum range of the adjustable resistor, and the capacitance value of the series-parallel capacitor is consistent with the maximum range of the adjustable capacitor.
On the basis of a traditional PID control circuit, an adjustable resistor and an adjustable capacitor are respectively connected in parallel and in series with resistors and capacitors with different numerical values, and switches S1-S4 are used for controlling on-off of resistors R1-R4 and capacitors C1-C4, so that the purpose of rapid setting is achieved. In the debugging process, a rule base for fuzzification and fuzzy control of response time is gradually formed, and the rule base is shown in tables 1 to 3.
The fuzzy rule base of fuzzy control is defined as follows:
TABLE 1 Adjustable resistance Module RX3
Response time Very quickly Fast-acting toy In general Slow Very slowly
S1 Closure is provided Open Open Open Open
S2 Closure is provided Open Open Open Open
S3 Closure is provided Closure is provided Open Closure is provided Open
S4 Closure is provided Closure is provided Closure is provided Open Open
TABLE 2 Adjustable resistance Module RX4
Corresponding time Very quickly Fast-acting toy In general Slow Very slowly
S1 Open Closure is provided Closure is provided Closure is provided Closure is provided
S2 Open Open Closure is provided Closure is provided Closure is provided
S3 Open Open Open Closure is provided Closure is provided
S4 Open Open Open Open Closure is provided
TABLE 3 Adjustable resistance Module CX3
Corresponding time Very quickly Fast-acting toy In general Slow Very slowly
S1 Open Closure is provided Closure is provided Closure is provided Closure is provided
S2 Open Open Closure is provided Closure is provided Closing is carried out
S3 Open Open Open Closure is provided Closure is provided
S4 Open Open Open Open Closure is provided
Fuzzification of corresponding time is determined according to the overall response time of the power output control circuit and the three protection circuits, and if the maximum corresponding time is T, 0T to 0.2T is defined as fast, 0.2T to 0.4T is fast, 0.4T to 0.6T is general, 0.6T to 0.8T is slow, and 0.8T is slow. The definition method of blurring is not exclusive, and for example, the definitions are 0T to 0.5T fast, the definitions are 0.4T to 0.6T general, and the definitions are 0.5T to slow. The fuzzification depends on the actual debugging process and the debugging experience of the debugging personnel.
When a plurality of control point libraries are cooperatively regulated, PID parameters do not need to be debugged one by one, and debugging is not needed to be carried out in the whole range of the adjustable component, so that the setting time is greatly reduced.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (4)

1. A quick setting circuit based on a fuzzy control strategy comprises an input variable module, a fuzzy controller and an output variable module, and is characterized in that the input variable module is a set voltage value; the fuzzy controller converts a set voltage value into a fuzzy quantity, converts the obtained fuzzy control quantity into an accurate control quantity through a fuzzy algorithm, and comprises a measuring module (6) and four fuzzy control modules, wherein the four fuzzy control modules are respectively a first F-PID control circuit (1) for power stable output control, a second F-PID control circuit (2) which is used for protecting a signal I and is connected with the first F-PID control circuit in series, and the second F-PID control circuit
A third F-PID control circuit (3) for protecting a second signal and a fourth F-PID control circuit (4) for protecting a third signal and connected with the third F-PID control circuit in parallel, wherein each fuzzy control module is provided with a switch control (5); the output variable module comprises a power amplifier module (7) and a power output module (8) connected with the power amplifier module in series, and the measuring module (6) measures the output power of the power amplifier module and feeds back a voltage signal to the first F-PID control circuit (1).
2. The fuzzy control strategy-based rapid tuning circuit according to claim 1, wherein the fuzzy control module comprises a control module and an operational amplifier U1, one input end of the operational amplifier U1 is connected to an isolation resistor R, and one end of the isolation resistor R is the second input of the fuzzy control module; the other input end of the operational amplifier U1 is connected with a resistor RX2, and the resistor RX2 is connected with a first input end of the fuzzy control module after being connected with a capacitor CX1 in series; the output end of the operational amplifier U1 is connected with the output of the fuzzy control module; the resistor RX2 and the capacitor CX1 are connected with the adjustable resistor module RX3 in parallel, the adjustable resistor module RX4 and the adjustable capacitor module CX3 are connected in series and then connected with the capacitor CX2 in parallel, and two ends of the capacitor CX2 are respectively connected to the input end of the operational amplifier U1 connected with the resistor RX2 and the output end of the operational amplifier U1;
the adjustable resistance module RX3 and the adjustable resistance module RX4 are proportional control parts, the adjustable capacitance module CX3 and the adjustable resistance module RX3 are integral control parts, and the capacitance CX1, the resistance RX2, the adjustable resistance module RX4 and the capacitance CX2 are differential control parts.
3. The fuzzy control strategy based quick tuning circuit of claim 2, wherein the adjustable resistance module comprises a resistor R1, a resistor R2 and an adjustable resistance RES which are sequentially connected in series, the resistor R1 is connected in parallel with a switch S3, the resistor R2 is connected in parallel with a switch S4, after the resistor R3 is connected in series with the switch S2, one end of the resistor R1 is connected to the left side, and the other end of the resistor R2 is connected to the right side of the adjustable resistance RES; after the resistor R4 is connected with the switch S1 in series, one end of the resistor R1 is connected with the left side of the resistor R1, and the other end of the resistor R4 is connected with the right side of the adjustable resistor RES.
4. The fuzzy control strategy-based quick tuning circuit according to claim 2, wherein the adjustable capacitor module comprises a capacitor C1, a capacitor C2 and an adjustable capacitor CES which are sequentially connected in series, the capacitor C1 is connected in parallel with a switch S3, the capacitor C2 is connected in parallel with a switch S4, after the capacitor C3 is connected in series with the switch S2, one end of the adjustable capacitor module is connected to the left side of the capacitor C1, and the other end of the adjustable capacitor module is connected to the right side of the adjustable capacitor CES; after the capacitor C4 and the switch S1 are connected in series, one end of the capacitor C1 is connected to the left side of the capacitor C1, and the other end of the capacitor C1 is connected to the right side of the adjustable capacitor REC.
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