CN107885116A - A kind of intelligent switch system and its control method - Google Patents

Abstract

An intelligent switch system and its control method. The switch system includes a wireless interaction module respectively arranged at a user operation end and an actuator end, and the wireless interaction module at the actuator end is connected to a single-chip microcomputer; And various control objects controlled by the single-open double-control switch; the single-chip microcomputer can send control signals to the single-open double-control switch through the switch actuator, and the single-chip microcomputer is also connected to the sound detection module and the light detection module; the switch actuator is connected to the household AC The power supply, the household AC power supply is connected to the single chip microcomputer and the wireless interactive module at the actuator end respectively through the power conversion module. The control method combines the fuzzy control process, and can realize intelligent adaptive adjustment according to the sound and light characteristics of the external environment where the control object is located. The invention utilizes the wireless technology to greatly improve the control range and extension function of the switch, and is simple to use, convenient to operate and low in cost.

Description

An intelligent switch system and its control method

technical field

The invention relates to the field of smart home appliances, in particular to an intelligent switch system and a control method thereof.

Background technique

The traditional switch is a switch with normally open and normally closed contacts at the same time (that is, a pair). It adopts mechanical control and has low manufacturing cost, but there is a big disadvantage, that is, the installation position of the ordinary switch is fixed, and People have to go to a fixed position to touch the switch. For this reason, people have developed a single-open double-control switch, that is, two single-open double-control switches installed in different positions are used to realize the control of the same object, such as lighting fixtures. However, this requires an additional single-open double-control switch, and additional laying of corresponding control lines is also required. Although the appearance of the single-open double-control switch has changed the manipulable position of the control object from one fixed point to two fixed points, the controllable range is still limited. In recent years, traditional home appliances have gradually developed into technological and intelligent home appliances. At the same time, with the improvement of chip manufacturing process, the reduction of manufacturing cost and the development of digital technology, intelligent home appliances have begun to enter the family. Therefore, it is necessary to develop an intelligent switch.

Contents of the invention

The object of the present invention is to solve the above-mentioned problems in the prior art, and provide an intelligent switch system and its control method, which can not only expand the control range, but also be easy to use, easy to operate, and low in processing cost.

In order to achieve the above object, the technical scheme adopted by the intelligent switch system of the present invention:

Including the wireless interaction module set on the user operation end and the actuator end respectively, the wireless interaction module on the actuator end is connected to the single chip microcomputer; Object: the single-chip microcomputer can send control signals to the single-open double-control switch through the switch actuator, and the single-chip microcomputer is also connected to the sound detection module and the light detection module; the switch actuator is connected to the household AC power supply, and the household AC power supply is respectively connected to the single-chip microcomputer through the power conversion module Wireless interaction module with the actuator side.

The wireless interactive module at the user operation end is a WIFI upper computer, and the wireless interactive module at the actuator end is a WIFI wireless interactive module; the WIFI upper computer uses a smart phone, a tablet computer or a desktop computer, and the WIFI wireless interactive module uses a USR-WIFI232-A module . Described single-chip microcomputer adopts STC12C5A60S2 single-chip microcomputer.

The switch actuator includes a triode amplifying circuit and a single-pole double-throw relay; the triode amplifying circuit adopts an NPN type triode, its base is connected to the I/O port of the single-chip microcomputer, and the collector is connected to the coil circuit of the single-pole double-throw relay. The pole is grounded; the single-pole double-throw relay is connected to the household AC power supply and the control object respectively, and the single-pole double-throw relay and the single-open double-control switch form a double-control switch pair.

The wireless interactive module, single-chip microcomputer, switch actuator, single-open double-control switch and power conversion module at the actuator end are all arranged in the switch cassette; the switch cassette is provided with mains live wire terminals and mains ground wires terminal, mains neutral wire terminal, control object live wire terminal, control object ground wire terminal and control object neutral wire terminal; The neutral wire of the AC power supply is connected to the terminal of the neutral wire of the mains power supply, the ground wire of the household AC power supply is connected to the terminal of the ground wire of the mains power supply, and the single-open double-control switch is connected to the terminal of the live wire of the control object.

The sound detection module includes a sound sensor and a sound signal conditioning circuit, and the light detection module includes a light sensor and a light signal conditioning circuit.

The control method of the intelligent switch system of the present invention includes:

Define Ai, Bi, Vi respectively as the fuzzy domain of fuzzy variable sound signal S, light signal L and controller output variable S membership function set;

S1: fuzzy design of sound signal S;

1) Define the fuzzy universe as [-1,1], and the sound signal as S, which contains 4 fuzzy subsets: S={PB, PS, NS, NB}, where PB means positive big, PS means positive small, NS means negative small, NB means negative big;

2) The fuzzy subset is described by a triangular membership function;

S2: fuzzy design of light signal L;

1) Define the fuzzy universe as [-1,1], and the torque deviation as the variable L, which contains 4 fuzzy subsets: L={PB, PS, NS, NB}, where PB means positive, and PS means positive Small, NS means negative small, NB means negative big;

2) The fuzzy subset is described by a triangular membership function;

S3: fuzzy design of controller output variable S;

1) Define the control output as variable C in the fuzzy controller, which contains two fuzzy subsets: C = {C1, C2}, and the fuzzy universe is [1, 2], where C1 and C2 represent the two control outputs state quantities, the fuzzy subset S is a clear subset;

Among them, C1 means that the control is turned on; C2 means that the control is turned off;

2) The fuzzy subset is described by a triangular membership function;

S4: Establish fuzzy control rules;

According to the corresponding relationship between the fuzzy subsets of the variables S and L and the fuzzy subsets of the output variable C, the system fuzzy control rule table is obtained, and the control output is adjusted according to the fuzzy control rule table;

S5: After fuzzy reasoning, output the membership degree of the fuzzy variable membership function;

S6: Select the fuzzy controller output with the greatest possibility as the final output value, determine the sound and light characteristics of the external environment where the control object is located, and the single-chip microcomputer adaptively adjust the on-off of the control object according to the final output value.

In step S4, when the variable L is the PB in its fuzzy subset, and the variable S is the PB in its fuzzy subset, it means that the light intensity is the largest and the sound intensity is the largest. At this time, it is not necessary to open the actuator. By selecting the fuzzy controller output Variable fuzzy subset C2 set to adjust the control output.

In step S5, the Mamdani method is used for fuzzy reasoning, and the weight of the i-th fuzzy rule Ri in the entire fuzzy control system is:

α _i = min(μ _Ai (S), μ _Bi (L));

Wherein, μ _Ai (S) represents the degree of membership of the light signal S under different fuzzy domains, and μ _Bi (L) represents the degree of membership of the sound signal L under different fuzzy domains;

After fuzzy reasoning, the membership degree of the membership function to which each fuzzy rule belongs is:

μ' _Vi (C) = min(α _i , μ _Vi (C));

The membership degree of the output fuzzy variable membership function is:

In step S6, the fuzzy controller output value with the greatest possibility is selected by the following formula:

Compared with the prior art, the present invention uses wireless interactive technology on the basis of the traditional single-open double-control switch. The wireless interactive module at the user operation end sends out a switch command, and the control command is transmitted to the single-chip microcomputer through the wireless interactive module at the actuator end. After the single-chip microcomputer receives the control command, it sends the corresponding action command to the switch actuator to realize the manipulation of the control object. At the same time, the traditional single-open double-control switch used in the present invention still has the ability to manipulate the control object. More importantly, a light detection module and a sound detection module are installed in the device, and using the detected sound signal and light signal, the adaptive control of the intelligent switch can be realized in combination with fuzzy control technology. Therefore, the present invention utilizes wireless technology The control range and extension function of the switch are greatly improved, and the use is simple, the operation is convenient, and the cost is low, which not only effectively improves the comfort of life, but also further meets the diverse needs of people's life.

Compared with the prior art, the control method of the intelligent switch system of the present invention combines the fuzzy control process, the output of the fuzzy controller is already a clear value, no defuzzification is required, and the output of the fuzzy controller with the greatest possibility can be used as For the final output value, the control method of the present invention can realize intelligent self-adaptive adjustment according to the sound and light characteristics of the external environment where the control object is located, thereby effectively controlling the waste of electric energy and achieving the purpose of saving energy and reducing consumption.

Description of drawings

The structural representation of Fig. 1 intelligent switch system of the present invention;

The installation schematic diagram of Fig. 2 intelligent switch system of the present invention;

Fig. 3 is the structural representation of switch cassette of the present invention;

The fuzzy control structural diagram of Fig. 4 the present invention;

The membership function schematic diagram of Fig. 5 fuzzy sound input signal of the present invention;

Fig. 6 is a schematic diagram of the membership function of the fuzzy light input signal of the present invention;

Fig. 7 is a schematic diagram of the membership function of the fuzzy control output signal of the present invention;

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Referring to Figures 1-3, the intelligent switch system of the present invention includes wireless interaction modules respectively arranged at the user operation end and the actuator end, and the wireless interaction module at the actuator end is connected to the single-chip microcomputer 3 . The wireless interactive module at the user operation end is WIFI upper computer 1, and the wireless interactive module at the actuator end is WIFI wireless interactive module 2; WIFI upper computer 1 adopts smart phones, tablet computers or desktop computers, and WIFI wireless interactive module 2 adopts USR-WIFI232-A module. The actuator end also includes a switch actuator 4 , a single-open double-control switch 5 and various control objects 6 controlled by the single-open double-control switch 5 . The single-chip microcomputer 3 can send a control signal to the single-open double-control switch 5 through the switch actuator 4 , and the single-chip microcomputer 3 is also connected to the sound detection module 10 and the light detection module 11 . The sound detection module 10 includes a sound sensor 12 and a sound signal conditioning circuit 13 , and the light detection module 11 includes a light sensor 14 and a light signal conditioning circuit 15 .

The switch actuator 4 is connected to the household AC power supply 8, and the household AC power supply 8 is respectively connected to the single-chip microcomputer 3 and the wireless interaction module at the actuator end through the power conversion module 7.

Single-chip microcomputer 3 adopts STC12C5A60S2 single-chip microcomputer. The switch actuator 4 includes a triode amplifier circuit and a single-pole double-throw relay; the triode amplifier circuit adopts an NPN type triode, the base of which is connected to the I/O port of the single-chip microcomputer 3, the collector is connected to the coil circuit of the single-pole double-throw relay, and the emitter grounding; the single-pole double-throw relay is connected to the household AC power supply 8 and the control object 6 respectively, and the single-pole double-throw relay and the single-open double-control switch 5 form a double-control switch pair.

The wireless interactive module at the actuator end, the single-chip microcomputer 3, the switch actuator 4, the single-open double-control switch 5 and the power conversion module 7 are all arranged in the switch cassette 9; line connection terminal 17, mains zero line connection terminal 18, control object live wire connection terminal 19, control object ground wire connection terminal 20 and control object zero line connection terminal 21; The switch of the single-pole double-throw relay is connected, the neutral line of the household AC power supply 8 is connected with the mains neutral terminal 18, the ground wire of the household AC power supply 8 is connected with the mains ground terminal 17, and the single-open double-control switch 5 is connected with the control The object live wire terminal 19 is connected.

The control object 6 of the present invention can be a household appliance or a lamp, etc., and the voltage of the household AC power supply 8 is 220V; the power conversion module 7 is mainly composed of a power chip, a transformer and a level conversion circuit, and passes the AC power output by the 220V household AC power supply module through the The transformer generates 5V power, and then generates 3.3V power through the power chip. The 5V power supply supplies power to the single-chip microcomputer 3 and the switch actuator 4 . The 3.3V power supply supplies power for the WIFI wireless interactive module 2 .

The USR-WIFI232-A module used in WIFI wireless interactive module 2 is an integrated 802.11b/g/nWi-Fi low-power consumption module. Through the USR-WIFI232-A module, traditional low-end serial devices or MCUs All controlled devices can easily access the Wi-Fi wireless network. The module hardware integrates MAC, baseband chip, radio frequency transceiver unit, and power amplifier; the embedded firmware supports Wi-Fi protocol and configuration, as well as networking TCP/IP protocol. The single-chip microcomputer 3 adopts a STC12C5A60S2 single-chip microcomputer, and the serial port of the single-chip microcomputer 3 is connected with the serial communication interface of the WIFI wireless interactive module 2 .

The switch actuator 4 adopts HK4100F-DC5V-SHG single-pole double-throw relay, and the actions of the switch actuator 4 and the single-open double-control switch 5 can control the power supply of the control object 6 to be on and off.

The WIFI wireless interactive module 2 generates a wireless access point and creates a wireless network. The WIFI host computer 1 accesses the wireless network generated by the WIFI wireless interactive module 2. The WIFI host computer 1 controls the WIFI wireless interactive module 2 to send instructions to the single-chip microcomputer 3, and the single-chip microcomputer 4. Read the serial port instructions, analyze the instructions, and control the switch actuator 4 through the input and output interface to turn on and off the power supply, or through the sound detection module and light detection module of the device, the proposed intelligent control algorithm can be used to adaptively control the switch The actuator 4 turns on and off the power supply, or manually controls the on and off of the power supply to the single-open double-control switch 5 , so as to control the on-off of the controlled object 6 .

The present invention designs a special sound detection module 10 and a light detection module 11, and uses the detected sound signal and light signal to propose an adaptive control method for intelligent switches based on fuzzy control technology, as shown in Figure 4. The specific method: input The sound signal EF and light signal ET of the single-chip microcomputer 3 are defined as several discrete levels, which are input to the fuzzy controller after fuzzification, and fuzzy reasoning is performed on the fuzzy input according to the defined fuzzy control rules, and finally the final output is obtained by fuzzy decision-making, that is, The selected control on-off signal S. Since the output after the fuzzy decision is accurate, there is no need for defuzzification. The output signal of the algorithm is directly sent to the switch actuator 4, and then the power supply is controlled to be turned on and off.

The detailed fuzzy control adaptive method is divided into six steps, as follows:

Define Ai, Bi, Vi as the fuzzy field of fuzzy variable sound signal S, light signal L and controller output variable S membership function set respectively.

1. The fuzzy design of the sound signal S, as shown in Figure 5.

1. Define the fuzzy universe as [-1,1], and the sound signal as S, which contains 4 fuzzy subsets: S={PB, PS, NS, NB}, where PB means positive big, PS means positive small, NS means negative small, NB means negative large.

2. The fuzzy subset is described by the triangular membership function.

2. Fuzzy design of light signal L, as shown in FIG. 6 .

1. Define the fuzzy domain as [-1,1], and the torque deviation as the variable L, which contains 4 fuzzy subsets: L={PB, PS, NS, NB}, where PB means positive, and PS means positive Small, NS means negative small, NB means negative large.

2. The fuzzy subset is described by the triangular membership function.

3. The fuzzy design of the controller output variable S, as shown in Figure 7.

1. Define the control output as variable C in the fuzzy controller, which contains two fuzzy subsets: C={C1,C2}, and the fuzzy domain is [1,2]. Among them, C1 and C2 represent the two state quantities of the control output, and the fuzzy subset S is the clear subset, among which, C1 represents the control opening; C2 represents the control closing.

2. The fuzzy subset is described by the triangular membership function.

4. Fuzzy control rules

According to the correspondence between the fuzzy subsets of the variables S and L and the fuzzy subsets of the output variable C, the system fuzzy control rule table can be obtained, as shown in the following table.

Table 1 Fuzzy control rule table

According to the table of fuzzy control rules, it can be seen that when the variable L is the PB in its fuzzy subset, and the variable S is the PB in its fuzzy subset, it can be expressed that the light intensity is the largest and the sound intensity is the largest. At this time, there is no need to open the actuator . At this time, the control output can be adjusted by selecting the fuzzy subset C2 set of the output variables of the fuzzy controller.

5. Fuzzy reasoning method

Fuzzy reasoning adopts the most commonly used Mamdani method.

The weight of the i-th fuzzy rule Ri in the whole fuzzy control system is:

α _i = min(μ _Ai (S), μ _Bi (L));

Among them, μ _Ai (S) represents the membership degree of the light signal S under different fuzzy domains, and μ _Bi (L) represents the membership degree of the sound signal L under different fuzzy domains.

After fuzzy reasoning, the membership degree of the membership function to which each fuzzy rule belongs is:

μ' _Vi (C) = min(α _i , μ _Vi (C));

The membership degree of the output fuzzy variable membership function is:

6. Defuzzification method

Since the output of the fuzzy controller is already a clear value, there is no need to defuzzify, and only the maximum value rule is selected to select the output value. In this way, the fuzzy controller output with the greatest possibility can be selected as the final output value.

According to the above algorithm, the device of the present invention can realize an intelligent adaptive adjustment function according to the characteristics of the external environment (sound and light) of the device, effectively control the waste of electric energy, and achieve the purpose of saving energy and reducing consumption. It is more suitable for lighting control and other fields.

The device of the present invention only adds a wireless module (WIFI host computer, WIFI wireless module) detection module (sound and light) and a controller module (single-chip microcomputer, on-off actuator) on the basis of an ordinary single-open double-control switch, that is, it can Realize simultaneous control of WIFI host computer (smart phone, tablet or computer), external environment self-adaptation and common switch.

The intelligent single-open double-control switch device of the present invention uses a wireless WIFI module, an external environment detection module and a single-chip microcomputer module. The mobile phone or tablet computer sends control command data to the smart switch through WIFI. After receiving the control command, the single-chip microcomputer on the smart switch sends a corresponding action command to the on-off actuator, and then the relay of the on-off actuator executes the corresponding action, and the control system The on-off of the circuit, the relay of the on-off actuator and the manual mechanical switch are combined into a pair of double-control switches, thereby realizing triple control of manual, adaptive control and wireless control. Both the ordinary double control switch and the mobile phone wireless control of the present invention can control the opening and closing of the power supply of the electrical equipment. Their combination realizes the dual controllability of ordinary mechanical switches and wireless modules to control objects, which can be realized through simple and quick transformation of the existing switch panels and wiring boxes in current family houses, which can reduce the cost of functional transformation. For example, it can be connected to the power supply end of home appliances such as lamps and refrigerators, and can be controlled at any location in the home through a mobile phone. The electronic components used in the present invention are all known products, and those skilled in the art can know the specific connection mode of the electronic components according to the technical solution of the present invention.

Claims (10)

1. A kind of 1. intelligent switch system, it is characterised in that：Nothing including being respectively arranged at user operating side and executing agency end Line interactive module, the wireless interaction module connection single-chip microcomputer (3) at executing agency end；Executing agency end also includes switch executive mechanism (4) double control switch (5), is singly opened and by the various control objects (6) for singly opening double control switch (5) control；Described single-chip microcomputer (3) Control signal can be sent to double control switch (5) is singly opened by switch executive mechanism (4), single-chip microcomputer (3) is also connected with sound detection Module (10) and light detection module (11)；Switch executive mechanism (4) connection household AC power (8), household AC power (8) Connect the wireless interaction module of single-chip microcomputer (3) and executing agency end respectively by power transfer module (7).
2. 2. intelligent switch system according to claim 1, it is characterised in that：The wireless interaction module of user operating side is WIFI host computers (1), the wireless interaction module at executing agency end is WIFI wireless interactions module (2).
3. 3. intelligent switch system according to claim 2, it is characterised in that：Described WIFI host computers (1) are using intelligence Mobile phone, tablet personal computer or desktop computer, WIFI wireless interactions module (2) use USR-WIFI232-A modules.
4. 4. intelligent switch system according to claim 1, it is characterised in that：Described single-chip microcomputer (3) uses STC12C5A60S2 single-chip microcomputers.
5. 5. intelligent switch system according to claim 1, it is characterised in that：Described switch executive mechanism (4) includes three Pole pipe amplifying circuit and single-pole double-throw relay；Transistor amplifier uses NPN type triode, and its base stage is connected to single-chip microcomputer (3) I/O mouths, colelctor electrode are connected in the wire loop of single-pole double-throw relay, grounded emitter；

   Described single-pole double-throw relay is connected with household AC power (8) and control object (6) respectively, and single-pole double throw relay Device forms double control switch pair with singly opening double control switch (5).
6. 6. intelligent switch system according to claim 1, it is characterised in that：The wireless interaction mould at the executing agency end Block, single-chip microcomputer (3), switch executive mechanism (4), singly open double control switch (5) and power transfer module (7) is each provided at switch magazine (9) in；Civil power hot terminal sub (16), civil power ground wire binding post (17), city's electrical zero are left on described switch magazine (9) Line binding post (18), control object hot terminal sub (19), control object ground wire binding post (20) and control object Zero line binding post (21)；The live wire of household AC power (8) passes through civil power hot terminal sub (16) and single-pole double throw relay The switch of device is connected, and the zero line of household AC power (8) is connected with civil power zero line binding post (18), household AC power (8) Ground wire be connected with civil power ground wire binding post (17), singly open sub (19) phase of double control switch (5) and control object hot terminal Even.
7. 7. intelligent switch system according to claim 1, it is characterised in that：Described sound detection module (10) includes sound Sound sensor (12) and voice signal modulate circuit (13), light detection module (11) includes light sensor (14) and light is believed Number modulate circuit (15).
8. 8. the control method of intelligent switch system as described in any one claim in a kind of 1-7 such as claim, including：

   Ai is defined, Bi, Vi are respectively fuzzy variable voice signal S, light signal L and controller output variable S membership function collection Fuzzy field；

   S1：Voice signal S fuzzy design；

   1) ambiguity in definition domain is [- 1,1], voice signal S, is comprising 4 fuzzy subsets：S={ PB, PS, NS, NB }, Wherein PB represents honest, and PS represents just small, and NS represents negative small, and NB represents negative big；

   2) fuzzy subset is described using Triangleshape grade of membership function；

   S2：Light signal L fuzzy design；

   1) ambiguity in definition domain is [- 1,1], and torque deviation is variables L, is comprising 4 fuzzy subsets：L=PB, PS, NS, NB }, wherein PB represents honest, and PS represents just small, and NS represents negative small, and NB represents negative big；

   2) fuzzy subset is described using Triangleshape grade of membership function；

   S3：Controller output variable S fuzzy design；

   1) it is variable C that definition, which controls output, in fuzzy controller, is comprising 2 fuzzy subsets：C={ C1, C2 }, fuzzy theory Domain is [1,2], and wherein C1 and C2 represent two quantity of states of control output, and fuzzy subset S is clear subset；

   Wherein, C1 represents that control is open-minded；C2 represents that control is closed；

   2) fuzzy subset is described using Triangleshape grade of membership function；

   S4：Establish fuzzy control rule；

   According to variable S and L fuzzy subset fuzzy subset's corresponding relation with output variable C respectively, system ambiguous control is obtained Rule list, according to fuzzy control rule table, it is controlled the adjustment of output；

   S5：After fuzzy reasoning, the degree of membership of fuzzy variable membership function is exported；

   S6：Choose the fuzzy controller with maximum likelihood to export and be used as final output value, judge outer residing for control object (6) The sound and light characteristics of portion's environment, single-chip microcomputer (3) is according to the break-make of final output value self_adaptive adjusting object (6).
9. 9. control method according to claim 8, it is characterised in that：In step S4, when variables L is in its fuzzy subset When PB, variable S are the PB in its fuzzy subset, light intensity maximum is expressed as, intensity of sound is maximum, need not now open and hold Row mechanism, the adjustment of output is controlled by selecting the fuzzy subset C2 collection of fuzzy controller output variable.
10. 10. control method according to claim 8, it is characterised in that：In step S5, obscured using Mamdani methods Reasoning, weights of i-th fuzzy rule Ri in whole Fuzzy control system are：

    α_i=min (μ_Ai(S),μ_Bi(L))；

    Wherein, μ_Ai(S) degree of membership of the light signal S under different fuzzy fields, μ are represented_Bi(L) sound under different fuzzy fields is represented Signal L degree of membership；

    After fuzzy reasoning, the degree of membership for the membership function that every fuzzy rule is belonged to is：

    μ'_Vi(C)=min (α_i,μ_Vi(C))；

    Output fuzzy variable membership function degree of membership be：

    <mrow> <msub> <mi>&amp;mu;</mi> <mrow> <mi>V</mi> <mi>i</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>C</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mi>max</mi> <mrow> <mi>n</mi> <mo>=</mo> <mn>1</mn> </mrow> <mrow> <mi>n</mi> <mo>=</mo> <mn>16</mn> </mrow> </munderover> <mrow> <mo>(</mo> <msub> <mi>&amp;alpha;</mi> <mi>i</mi> </msub> <mo>,</mo> <msubsup> <mi>&amp;mu;</mi> <mrow> <mi>V</mi> <mi>i</mi> </mrow> <mo>&amp;prime;</mo> </msubsup> <mo>(</mo> <mi>C</mi> <mo>)</mo> <mo>)</mo> </mrow> <mo>;</mo> </mrow>

    The fuzzy controller output valve with maximum likelihood is chosen in step S6 by following formula：

    <mrow> <msub> <mi>&amp;mu;</mi> <mrow> <mi>S</mi> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>C</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mi>max</mi> <mrow> <mi>n</mi> <mo>=</mo> <mn>1</mn> </mrow> <mrow> <mi>n</mi> <mo>=</mo> <mn>2</mn> </mrow> </munderover> <mrow> <mo>(</mo> <msub> <mi>&amp;alpha;</mi> <mi>i</mi> </msub> <mo>,</mo> <msubsup> <mi>&amp;mu;</mi> <mrow> <mi>V</mi> <mi>i</mi> </mrow> <mo>&amp;prime;</mo> </msubsup> <mo>(</mo> <mi>C</mi> <mo>)</mo> <mo>)</mo> </mrow> <mo>.</mo> </mrow>