CN112015256B - Design method of chassis management module based on embedded processor - Google Patents
Design method of chassis management module based on embedded processor Download PDFInfo
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- CN112015256B CN112015256B CN202010892604.7A CN202010892604A CN112015256B CN 112015256 B CN112015256 B CN 112015256B CN 202010892604 A CN202010892604 A CN 202010892604A CN 112015256 B CN112015256 B CN 112015256B
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- 239000003990 capacitor Substances 0.000 claims description 11
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- 238000004891 communication Methods 0.000 claims description 7
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3055—Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available
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- Quality & Reliability (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention relates to a design method of a chassis management module based on an embedded processor, and belongs to the technical field of computers. The invention relates to a method for designing a chassis management module based on an embedded processor, which realizes the state acquisition of each processing blade, each SRIO exchange blade and each power blade in a radar signal data processing system, the screen display control of a display module on a system chassis, the acquisition and control of various input and output signals, the fan control and the like, and solves the management requirements of the radar signal data processing system on the system chassis by adopting the embedded processor.
Description
Technical Field
The invention belongs to the technical field of computers, and particularly relates to a design method of a chassis management module based on an embedded processor.
Background
In the traditional radar processing system, a blower control signal is generated by means of a BMC module on the functional blade, so that the blower on the chassis is controlled. However, since the BMC module is typically powered by 3.3V or 5V and the power supply is isolated from the power supply used by the blower for safety reasons, the blower control signal generated by the BMC module requires an additional isolation device and cannot control the three-wire blower. In addition, as the design of the system chassis is gradually complex, the functions are increased, and the BMC module with higher integration level cannot provide additional functional interfaces. Therefore, an independent chassis management module needs to be designed in the system for realizing control of fans and various peripheral devices on the chassis.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problems that: how to design an independent chassis management module in the system for realizing the control of fans and various peripheral devices on the chassis.
(II) technical scheme
In order to solve the technical problems, the invention provides a design method of a chassis management module based on an embedded processor, wherein the method designs the chassis management module to comprise a power conditioning circuit, a processor, an on-off control circuit and a fan control circuit, and a control object of the chassis management module comprises a BMC, a serial port screen, a custom button, a buzzer and a timer;
The power supply conditioning circuit is designed to be realized by a power supply conversion chip;
the on-off control circuit is designed to control the buzzer and the timer to be electrified and powered off;
The power supply of the chassis management module is 48V, and is respectively converted into 12V, 5V and 3.3V through a power supply conditioning circuit, wherein the 12V is used by a fan control circuit, a buzzer and a timer, the 5V is used by a serial port screen and a custom button, and the 3.3V is used by a processor;
The processor is designed to realize data communication and signal exchange between the chassis management module and each functional blade and between other modules in the chassis management module, and complete control of the chassis fan, so as to realize main logic of the chassis management module; the processor communicates with BMCs on all functional blades in the radar signal data processing system through two paths of I2C isolation channels, and obtains information and working states of the whole machine and the blades and monitors faults; the processor is connected with the serial port screen through one path of RS232 serial port, and prints the basic information of the whole machine and the blades, the working state of each board card, the inserting and extracting information of the board card, the abnormal state information of the board card, the voltage and current temperature information of each board card, the rotating speed of the fan, the wind speed control mode and the like through the serial port screen; the processor is connected with 4 custom keys through 8 paths of IO ports, comprises 4 paths of key lamp control and four paths of key state acquisition, and customizes the operation corresponding to the custom keys according to the user requirements, and defaults to use the custom keys as control buttons of a serial port screen; the buzzer and the timer are communicated through the on-off control circuit; the processor outputs through 3 paths of PWM, after being conditioned by the fan control circuit, the signals are converted into driving signals required by the 48V fan, and feedback signals of the fan are obtained; the processor captures fan feedback signals through 3 paths of input, and the signals are used as input capture sources for measuring the fan rotating speed after being driven and enhanced.
Preferably, in the method, the processor is designed to transfer data with the BMC on the functional blade through an I2C bus, when the BMC sends data to the processor, the I2C interrupt in the processor is triggered, the interrupt service function analyzes the received data according to a communication protocol, and the sent voltage, temperature, current and working state information are stored in a corresponding storage space;
The method comprises the steps of generating timer interruption by using a timer in a processor, refreshing a serial port screen state and memory space data, and simultaneously performing input capturing by using the timer interruption, counting a fan feedback signal and calculating the fan speed;
the program in the processor adopts an interrupt response type structure, and an initialization function is used for initializing peripheral equipment and opening interrupt; the user-defined key state is used for receiving BMC information as an external interrupt source, and after interrupt generation, the BMC information enters an interrupt service function to realize each preset function;
The user-defined key interface is set as an external interrupt source, and generates an interrupt after a key is pressed, and jumps to a corresponding interrupt service function to realize a function customized according to the user requirement;
The I2C interface is set to realize data exchange in an interrupt mode, only data is received and transmitted in an interrupt service function, one frame of data is received and then provided to a data processing function, and after the data processing function is distinguished according to command words, a corresponding control instruction is executed or the transmitted information is sent to a serial screen for printing;
the RS232 interface is connected with the serial port screen, and prints the information of the whole machine or the blade through the serial port printing function, and assists in alarming;
the PWM output interface selects a timer pin of the processor, outputs 3 paths of PWM waves with TTL level, and adjusts the duty ratio of the PWM waves according to the received BMC instruction or the temperature information of each part of the case so as to realize the control of the fan speed;
The input capturing interface selects a timer pin of the processor, is connected to a fan feedback line, counts the number of captured rising edges after the fan rotates, and calculates the current fan rotating speed according to the number of the rising edges received in unit time.
Preferably, the fan control circuit is designed to realize control of the fan by adopting a bootstrap circuit.
Preferably, the processor generates a PWM wave with the level of 3.3V, converts the PWM wave into a PWM wave with the level of 48V, the frequency and the duty ratio being the same as those of a previous stage through the bootstrap circuit, and is used for driving the fan to rotate, and the processor realizes the wind speed control of the fan by adjusting the frequency of the PWM wave.
Preferably, the bootstrap circuit is designed to be provided with two charging loops, the newly added charging loops adopt the back-end voltage as a power supply, a voltage stabilizing tube, a reverse diode and a resistor are matched in the loops to provide a second charging loop for the charging capacitor, and when the output end level is smaller than the back-end voltage, the charging capacitor starts to charge, so that the condition that the output end voltage is always larger than the charging voltage is avoided.
Preferably, in the chassis management module, three modes are designed to control wind speed.
Preferably, in the chassis management module, three modes are adopted to control wind speed specifically:
1) Manual mode: the user can modify the wind speed jump temperature threshold value or directly set the rotating speed of the fan through a custom key to control the rotating speed of the fan;
2) Open loop automatic control mode: the chassis management module adjusts the fan speed at the corresponding position according to the temperature of each functional blade, and realizes open-loop automatic control of the wind speed by taking the temperature value as an adjustment standard;
3) Closed loop automatic control mode: the processor obtains PID parameters of a control loop according to the PID closed-loop control algorithm, takes the change rate of the temperature of each blade as a feedback signal, takes the temperature and the target value of the change rate of the temperature as a reference value, adjusts the change trend of the speed of the fan, and realizes the steady-state control of the temperature in the chassis.
Preferably, the on-off control circuit is designed to realize on-off control of each channel by using a darlington tube ULN 2803.
Preferably, the processor is realized by adopting a megainnovative GD32F450IKH chip.
The invention also provides a case management module designed by the method.
(III) beneficial effects
The invention relates to a method for designing a chassis management module based on an embedded processor, which realizes the state acquisition of each processing blade, each SRIO exchange blade and each power blade in a radar signal data processing system, the screen display control of a display module on a system chassis, the acquisition and control of various input and output signals, the fan control and the like.
Drawings
Fig. 1 is a schematic diagram of hardware components of a chassis management module provided by the present invention;
FIG. 2 is a serial port screen interface jump diagram of the chassis management module according to the present invention;
FIG. 3 is a flow chart of the operation of the chassis management module of the present invention;
FIG. 4 is a schematic diagram of a fan control circuit in the present invention;
FIG. 5 is a schematic diagram of a conventional bootstrap circuit;
fig. 6 is a schematic diagram of a bootstrap circuit modified in accordance with the present invention.
Detailed Description
For the purposes of clarity, content, and advantages of the present invention, a detailed description of the embodiments of the present invention will be described in detail below with reference to the drawings and examples.
The radar signal data processing system consists of various functional blades and a case, and display and indication devices such as a serial port screen, keys, an indicator light, a buzzer and the like are arranged on the case. The invention designs a chassis management module based on an embedded processor, which adopts the embedded processor to collect health information of a functional blade, control various peripheral devices on a chassis and realize the management function of the radar signal data processing system chassis.
As shown in fig. 1, the invention designs a chassis management module based on an embedded processor, which comprises a power conditioning circuit, a processor, an on-off control circuit and a fan control circuit, wherein the control object of the chassis management module comprises a BMC, a serial port screen, a custom button, a buzzer and a timer;
The power supply conditioning circuit is realized by a power supply conversion chip;
The on-off control circuit is used for controlling the buzzer and the timer to be electrified and powered off, and the on-off control of each channel is realized by adopting a Darlington pipe ULN 2803;
The power supply of the chassis management module is 48V, and is respectively converted into 12V, 5V and 3.3V through a power supply conditioning circuit, wherein the 12V is used by a fan control circuit, a buzzer and a timer, the 5V is used by a serial port screen and a custom button, and the 3.3V is used by a processor;
The processor selects a megainnovating GD32F450IKH chip for realizing data communication and signal exchange between the chassis management module and each functional blade and other modules in the chassis management module, and completing control of a chassis fan to realize main logic of the chassis management module; the processor communicates with BMCs on all functional blades in the radar signal data processing system through two paths of I2C isolation channels, and obtains information and working states of the whole machine and the blades and monitors faults; the processor is connected with the serial port screen through one path of RS232 serial port, and prints the basic information of the whole machine and the blades, the working state of each board card, the inserting and extracting information of the board card, the abnormal state information of the board card, the voltage and current temperature information of each board card, the rotating speed of the fan, the wind speed control mode and the like through the serial port screen; the processor is connected with 4 custom keys through 8 paths of IO ports, comprises 4 paths of key lamp control and four paths of key state acquisition, and customizes the operation corresponding to the custom keys according to the user requirements, and defaults to use the custom keys as control buttons (up, down, confirm and return) of a serial port screen; the buzzer and the timer are communicated through the on-off control circuit; the processor outputs through 3 paths of PWM, after being conditioned by the fan control circuit, the signals are converted into driving signals required by the 48V fan, and feedback signals of the fan are obtained; the processor captures fan feedback signals through 3 paths of input, and the signals are used as input capture sources for measuring the fan rotating speed after being driven and enhanced.
The chassis management module prints the module basic information through the serial port screen. The serial port screen adopts V0076-FA-002 of the Venue company, and can load word stock, pictures and function plug-in design interfaces by adopting serial port commands. The processor displays different interfaces on the serial port screen through serial port commands according to the external key states, health information of each functional blade in the case, fan states and the like.
And designing a serial port screen interface according to the system requirement. The serial port screen interface is divided into a startup interface, a slot state interface, a fan speed control interface, a temperature threshold setting interface, a power blade interface, a calculation blade interface, a switch blade interface, a chassis menu interface and the like. The user can control each option in the interface through the external keys, jump between the interfaces and realize the control of the functions of the chassis.
According to interface characteristics, it is divided into two categories: a fixed interface and an instant refresh interface.
The fixed interface comprises a startup interface, a temperature threshold setting interface and a chassis menu interface. After the interface is sent to the serial screen for display, the displayed picture does not need to be refreshed before the next external trigger source for changing the interface display comes.
The instant refreshing interface comprises a slot state interface, a fan speed control interface, a power blade interface, a calculating blade interface and a exchanging blade interface. After the interface is sent to the serial screen for display, the interface needs to be refreshed according to fixed time frequency before the next trigger source for changing the interface display comes.
The jump relationship between the interfaces is shown in fig. 2.
And data are transmitted between the chassis management module and the BMC on the functional blade through the IIC bus. When the BMC sends data to the chassis management module, an IIC interrupt in the processor is triggered. The interrupt service function analyzes the received data according to the communication protocol, and stores the transmitted voltage, temperature, current and working state information in the corresponding storage space.
In order to enable the chassis management module to realize various functions according to fixed time frequency, a timer in the processor is used for generating timer interrupt for refreshing the state of the serial port screen, refreshing the data of the storage space and the like. And meanwhile, the timer interrupt is used for input capture, and fan feedback signals are counted for calculating the fan speed.
The chassis management module workflow diagram is shown in fig. 3.
The functions are divided into an initialization function and an interrupt service function. The program adopts an interrupt response type structure, and an initialization function is used for initializing peripheral equipment and opening interrupt; the user-defined key state is used for receiving BMC information as an external interrupt source, and the BMC information enters an interrupt service function after interrupt generation, so that each preset function is realized.
The user-defined key interface is set as an external interrupt source, and generates an interrupt after a key is pressed, and jumps to a corresponding interrupt service function to realize a function customized according to the user requirement;
The I2C interface is set to realize data exchange in an interrupt mode, only data is received and transmitted in an interrupt service function, one frame of data is received and then provided to a data processing function, and after the data processing function is distinguished according to command words, a corresponding control instruction is executed or the transmitted information is sent to a serial screen for printing;
the RS232 interface is connected with the serial port screen, and prints the information of the whole machine or the blade through the serial port printing function, and assists in alarming;
the PWM output interface selects a timer pin of GD32F450, outputs 3 paths of PWM waves with TTL level, and adjusts the duty ratio of the PWM waves according to the received BMC instruction or the temperature information of each part of the case to realize the control of the fan speed;
The input capturing interface selects a timer pin of GD32F450 to be connected to a fan feedback line, after the fan rotates, the number of captured rising edges is counted, and the current fan rotating speed is calculated according to the number of the rising edges received in unit time.
The bootstrap circuit is adopted in the fan control circuit to realize the control of the fan. The processor generates PWM waves with the level of 3.3V, and the PWM waves are converted into PWM waves with the level of 48V, the frequency and the duty ratio being the same as those of the previous stage through the bootstrap circuit and are used for driving the fan to rotate. The processor controls the wind speed of the fan by adjusting the frequency of the PWM waves.
The conventional bootstrap circuit is provided with only one charging loop. In the bootstrap circuit with the front end voltage of 12V constructed by IRF2117 in fig. 5, when the voltage at the VS end is less than 12V, the capacitor C1 starts to charge through the loop shown in fig. 6, and the discharge voltage and the output voltage of the capacitor are superimposed through bootstrap boosting the capacitor, so as to provide the required turn-on voltage for the MOS transistor.
In practical application, when the voltage of the rear end is far higher than that of the front end, the phenomenon that the capacitor cannot be charged and the circuit cannot work normally occurs. Because the load of the circuit is often inductive or capacitive load, when the MOS tube is turned off, the output end level of the bootstrap circuit cannot return to the low level immediately, and even the condition that the output end voltage is always larger than the front end voltage is generated. At this time, the charging capacitor cannot be charged, so that the MOS tube cannot be conducted, and the circuit fails.
In the invention, the circuit fault is avoided by adding a charging loop. As shown in fig. 6, the newly added charging loop adopts the back-end voltage as a power supply, and a voltage stabilizing tube, a reverse diode and a resistor are matched in the loop to provide a second charging loop for the charging capacitor. At this time, when the output terminal level is smaller than the back-end voltage, the charging capacitor starts to charge, that is, the condition that the output terminal voltage is always larger than the charging voltage is avoided. SI7850 in fig. 4 corresponds to the MOS transistor in fig. 6.
In the present invention, three modes are used to control wind speed.
1) Manual mode. The user can modify the wind speed jump temperature threshold value or directly set the rotating speed of the fan through a custom button to control the rotating speed of the fan.
2) Open loop automatic control mode. The chassis management module adjusts the fan speed at the corresponding position according to the temperature of each functional blade, and realizes open-loop automatic control of the wind speed by taking the temperature value as an adjustment standard.
3) Closed loop automatic control mode. The processor obtains PID parameters of a control loop according to the PID closed-loop control algorithm, takes the change rate of the temperature of each blade as a feedback signal, takes a target value of temperature plus the change rate of the temperature as a reference value, adjusts the change trend of the speed of the fan, and realizes the steady-state control of the temperature in the chassis.
The invention has application to high performance radar signal data processing computers. And adopting an embedded processor to manufacture a chassis management module meeting the requirements. The module can obtain the information such as temperature, voltage, current, power, working state and the like of each functional board card in the computer through data communication; the self-defined key state on the case can be collected, and the key function is customized according to the user requirement; output devices such as a buzzer and an indicator lamp can be controlled, so that functions such as state indication and warning are realized; the wind speed control of the fan can be realized by adopting a plurality of modes; health information of the functional blades in the computer, fan states and the like can be displayed through the serial port screen. The invention meets the requirement of realizing state management of the whole radar signal data processing computer in a working state.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (7)
1. The method is characterized in that the method designs the chassis management module to comprise a power conditioning circuit, a processor, an on-off control circuit and a fan control circuit, wherein the control object of the chassis management module comprises a BMC, a serial port screen, a custom button, a buzzer and a timer;
The power supply conditioning circuit is designed to be realized by a power supply conversion chip;
the on-off control circuit is designed to control the buzzer and the timer to be electrified and powered off;
The power supply of the chassis management module is 48V, and is respectively converted into 12V, 5V and 3.3V through a power supply conditioning circuit, wherein the 12V is used by a fan control circuit, a buzzer and a timer, the 5V is used by a serial port screen and a custom button, and the 3.3V is used by a processor;
The processor is designed to realize data communication and signal exchange between the chassis management module and each functional blade and between other modules in the chassis management module, and complete control of the chassis fan, so as to realize main logic of the chassis management module; the processor communicates with BMCs on all functional blades in the radar signal data processing system through two paths of I2C isolation channels, and obtains information and working states of the whole machine and the blades and monitors faults; the processor is connected with the serial port screen through one path of RS232 serial port, and prints the basic information of the whole machine and the blades, the working state of each board card, the inserting and extracting information of the board card, the abnormal state information of the board card, the voltage and current temperature information of each board card, the rotating speed of the fan and the wind speed control mode through the serial port screen; the processor is connected with 4 custom keys through 8 paths of IO ports, comprises 4 paths of key lamp control and four paths of key state acquisition, and customizes the operation corresponding to the custom keys according to the user requirements, and defaults to use the custom keys as control buttons of a serial port screen; the buzzer and the timer are communicated through the on-off control circuit; the processor outputs through 3 paths of PWM, after being conditioned by the fan control circuit, the signals are converted into driving signals required by the 48V fan, and feedback signals of the fan are obtained; the processor inputs and captures fan feedback signals through 3 paths, and the signals are used as input capturing sources for measuring the fan rotating speed after being driven and enhanced;
The fan control circuit is designed to realize control of the fan by adopting a bootstrap circuit; the processor generates PWM waves with the level of 3.3V, converts the PWM waves into PWM waves with the level of 48V, the frequency and the duty ratio being the same as those of a previous stage through the bootstrap circuit, and is used for driving the fan to rotate, and the processor realizes the wind speed control of the fan by adjusting the frequency of the PWM waves;
The bootstrap circuit is designed to: the two charging loops are arranged, the newly added charging loop adopts the rear-end voltage as a power supply, a voltage stabilizing tube, a reverse diode and a resistor are matched in the loop, a second charging loop is provided for the charging capacitor, and when the output end level is smaller than the rear-end voltage, the charging capacitor starts to charge, so that the condition that the output end voltage is always larger than the charging voltage is avoided.
2. The design method of claim 1, wherein the method designs the processor to transfer data with the BMC on the functional blade through the I2C bus, when the BMC sends data to the processor, the BMC triggers an I2C interrupt in the processor, the interrupt service function parses the received data according to a communication protocol, and stores the sent voltage, temperature, current and working state information in a corresponding storage space;
The method comprises the steps of generating timer interruption by using a timer in a processor, refreshing a serial port screen state and memory space data, and simultaneously performing input capturing by using the timer interruption, counting a fan feedback signal and calculating the fan speed;
the program in the processor adopts an interrupt response type structure, and an initialization function is used for initializing peripheral equipment and opening interrupt; the user-defined key state is used for receiving BMC information as an external interrupt source, and after interrupt generation, the BMC information enters an interrupt service function to realize each preset function;
The user-defined key interface is set as an external interrupt source, and generates an interrupt after a key is pressed, and jumps to a corresponding interrupt service function to realize a function customized according to the user requirement;
The I2C interface is set to realize data exchange in an interrupt mode, only data is received and transmitted in an interrupt service function, one frame of data is received and then provided to a data processing function, and after the data processing function is distinguished according to command words, a corresponding control instruction is executed or the transmitted information is sent to a serial screen for printing;
the RS232 interface is connected with the serial port screen, and prints the information of the whole machine or the blade through the serial port printing function, and assists in alarming;
the PWM output interface selects a timer pin of the processor, outputs 3 paths of PWM waves with TTL level, and adjusts the duty ratio of the PWM waves according to the received BMC instruction or the temperature information of each part of the case so as to realize the control of the fan speed;
The input capturing interface selects a timer pin of the processor, is connected to a fan feedback line, counts the number of captured rising edges after the fan rotates, and calculates the current fan rotating speed according to the number of the rising edges received in unit time.
3. The design method of claim 1, wherein in the chassis management module, three modes are designed to control wind speed.
4. The design method of claim 3, wherein in the chassis management module, three modes are adopted to control wind speed specifically:
1) Manual mode: the user can modify the wind speed jump temperature threshold value or directly set the rotating speed of the fan through a custom key to control the rotating speed of the fan;
2) Open loop automatic control mode: the chassis management module adjusts the fan speed at the corresponding position according to the temperature of each functional blade, and realizes open-loop automatic control of the wind speed by taking the temperature value as an adjustment standard;
3) Closed loop automatic control mode: the processor obtains PID parameters of a control loop according to the PID closed-loop control algorithm, takes the change rate of the temperature of each blade as a feedback signal, takes the temperature and the target value of the change rate of the temperature as a reference value, adjusts the change trend of the speed of the fan, and realizes the steady-state control of the temperature in the chassis.
5. The design method as set forth in claim 1, wherein the on-off control circuit is designed to implement on-off control of each channel using a darlington tube ULN 2803.
6. The method of claim 1, wherein the processor is implemented using a megainnovative GD32F450IKH chip.
7. A chassis management module designed by the method of any one of claims 1 to 6.
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