CN114228825A - Electric power steering control system and method - Google Patents
Electric power steering control system and method Download PDFInfo
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- CN114228825A CN114228825A CN202111616872.7A CN202111616872A CN114228825A CN 114228825 A CN114228825 A CN 114228825A CN 202111616872 A CN202111616872 A CN 202111616872A CN 114228825 A CN114228825 A CN 114228825A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/046—Controlling the motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/046—Controlling the motor
- B62D5/0463—Controlling the motor calculating assisting torque from the motor based on driver input
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Abstract
The application relates to an electric power steering control system and method, which relate to the technical field of intelligent constant temperature and comprise the following steps: the power supply module is respectively connected with the power supply ends of the voltage regulating module and the execution module; the voltage regulating module is used for regulating the voltage provided by the power supply module; the first detection module is connected to the output end of the voltage regulating module and outputs a torque signal; the second detection module is connected to the output end of the voltage regulation module and outputs a steering wheel angle signal; the processing module is connected with the output ends of the first detection module and the second detection module, processes and analyzes the torque signal and the steering wheel angle signal, and outputs an execution signal; the execution module is connected to the signal output end of the execution module and used for receiving and responding to the execution signal and controlling the motor.
Description
Technical Field
The present application relates to the field of power steering technologies, and in particular, to an electric power steering control system and method.
Background
With the deep development of automobile technology, the requirements for optimizing product performance and reducing cost are higher and higher, and products with high cost performance have very strong market competitiveness and are key requirements of various automobile manufacturers.
The electric power steering system (EPS) is accepted by more and more automobile manufacturers due to the characteristics of accurate response, strong controllability, low energy consumption and the like, and gradually becomes an automobile standard product. The active aligning function is an important function in an electric power steering system and can help a driver to reasonably control the aligning posture of a vehicle, wherein the acquisition of real-time angle information of a steering wheel is the basis and the key for realizing the active aligning function. The conventional electric power steering system generally includes a plurality of functional modules, and the operating voltage specifications of the functional modules are different from each other, so that an additional transformer needs to be provided to adjust the power supply voltage to meet the power supply specifications of the functional modules.
In view of the above-mentioned related technologies, the inventor thinks that the installation of the transformer not only increases the power consumption cost and the calorific value of the motor power-assisted steering system, but also increases the failure risk of the motor power-assisted steering system, thereby having the defect of low working efficiency of the motor power-assisted steering system.
Disclosure of Invention
In order to improve the working efficiency of a motor power-assisted steering system, the application provides an electric power-assisted steering control system and a method. The following technical scheme is adopted:
an electric power steering control system comprising: the power supply module is respectively connected with power supply ends of the voltage regulating module and the execution module and used for providing electric energy;
the voltage regulating module is used for regulating the voltage provided by the power supply module;
the first detection module is connected to the output end of the pressure regulating module and used for detecting the torque force of the steering wheel and outputting a torque signal;
the second detection module is connected to the output end of the voltage regulation module and used for detecting the torsion angle of the steering wheel and outputting a steering wheel angle signal;
the processing module is connected to the output ends of the first detection module and the second detection module, and is used for receiving the torque signal and the steering wheel angle signal, processing and analyzing the torque signal and the steering wheel angle signal, and outputting an execution signal;
and the execution module is connected with the signal output end of the execution module and used for receiving and responding to the execution signal and controlling the motor.
By adopting the technical scheme, when the motor power-assisted steering system is used, the working voltage requirements of each module are firstly detected, the voltage provided by the power supply module is regulated by using the voltage regulating module according to the working voltage requirements, then the torque and the angle of the steering wheel are detected by using the first detection module and the second detection module to obtain the torque signal and the steering wheel angle signal, then the processing module processes and analyzes the torque signal and the steering wheel angle signal to determine the torque force and the steering angle of the current steering wheel and output the torque force and the steering angle to the execution module to send the execution signal, and finally the execution module controls the motor according to the execution signal to complete the realization of the motor power-assisted steering The motor power-assisted steering system has the advantages of reducing failure risks, saving installation space, reducing usage heat and the like, and achieves the effect of improving the working efficiency of the motor power-assisted steering system.
Optionally, the voltage regulation module includes a DC/DC power converter and an LDO power converter, a power supply end of the DC/DC power converter is connected to the power supply module, and a voltage of the power supply module is regulated to a standard voltage of the LDO power converter, a power supply end of the LDO power converter is connected to the converted standard voltage, and a secondary regulation is performed on a working voltage, so as to obtain a working voltage meeting the requirements of the first detection module, the second detection module and the execution unit.
Through adopting above-mentioned technical scheme, it is difficult to see out, the voltage regulating module of this scheme adopts the layering pressure regulating mode, the voltage regulating module contains one-level pressure regulating and second grade pressure regulating promptly, its one-level pressure regulating includes DC/DC power converter, be used for carrying out basic adjustment to the voltage of power module, make the voltage satisfy with subsequent second grade pressure regulating power supply demand, its second grade pressure regulating includes LDO power converter, be used for carrying out secondary adjustment to the voltage that DC/DC power converter improved, make the voltage satisfy the operating voltage of other modules in this system, do the foreshadowing for the normal use of follow-up other function modules, two power converter's setting is compared with the transformer, installation space and cost have not only been saved, also reduced the risk of failure and used calorific capacity simultaneously, provide steady voltage for follow-up function module.
Optionally, the first detection module includes a torque sensor for detecting a torque force of the steering wheel, and a power supply terminal of the torque sensor is connected to an output terminal of the LDO power converter and sends the detected torque force to the processing module in the form of an output of a torque signal.
By adopting the technical scheme, the torque sensor detects the torque force of the steering wheel, and sends the detected torque signal to the processing module in the form of an electric signal, so that the subsequent processing module can process data conveniently, and the effect of improving the working efficiency is achieved.
Optionally, the second detection module includes a steering wheel angle sensor for detecting a steering wheel rotation angle, a power supply end of the steering wheel angle sensor is connected to an output end of the LDO power converter, and the detected steering wheel rotation angle is sent to the processing module in an output form of a steering wheel angle signal.
By adopting the technical scheme, the steering wheel angle sensor detects the torsion direction of the steering wheel, and sends the detected steering wheel angle signal to the processing module in the form of an electric signal, so that the subsequent processing module can process data conveniently, and the effect of improving the working efficiency is achieved.
Optionally, the processing module includes a main control MCU and a driver chip for receiving the torque signal and the steering wheel angle signal, a power supply end of the main control MCU and the driver chip is connected to an output end of the LDO power converter, the main control MCU performs logic processing analysis on the torque signal and the steering wheel angle signal, and sends the processed execution data to the driver chip, and the driver chip generates and outputs the execution signal after receiving the execution data.
By adopting the technical scheme, when the main control MCU accesses the sensor, the main control MCU firstly sends out an 8-bit register pointer and then sends out the address (7-bit address, the low bit is WR signal) of the sensor, namely the output end of the sensor. There are 3 registers available to the master MCU in the sensor and an 8-bit register pointer is used to determine which register the master MCU will use. In the scheme, the main control MCU accesses the torque sensor and the steering wheel angle sensor simultaneously, the measured values of the two sensors are read, after the main control MCU reads the measured values of the sensors, the measured values are converted and processed, processed data are sent to the driving chip, the driving chip generates an execution instruction according to the data processed by the main control MCU and sends the execution instruction to the execution unit in the form of an execution signal, and therefore the effect of controlling the execution unit is achieved.
Optionally, the execution module includes a motor-driven three-phase bridge and a brushless motor, a power supply end of the motor-driven three-phase bridge is connected to the power supply module, a signal input end of the motor-driven three-phase bridge is connected to a signal output end of the driving chip to receive the execution signal, and an output end of the motor-driven three-phase bridge is connected to the power supply end of the brushless motor.
By adopting the technical scheme, after the motor-driven three-phase bridge receives the execution signal, the PWM duty ratio is changed according to the execution signal fixed frequency to carry out frequency control, the regulated voltage is improved to the brushless motor, and the brushless motor provides power for steering after receiving the regulated voltage, so that the effect of flexible control is achieved.
Optionally, the system further comprises a temperature detection module, a power supply voltage detection module, a motor rotor angle detection module and a fault alarm module;
the temperature detection module comprises a temperature sensor for detecting the temperature of the motor drive three-phase bridge, the power supply end of the temperature sensor is connected with the LDO power converter, the signal output end of the temperature sensor is connected with the signal output end of the main control MUC, and the detected temperature value of the motor drive three-phase bridge is sent to the main control MCU in the form of temperature detection signal output;
the power supply voltage detection module comprises a voltage sensor for detecting the voltage of the power supply module, the power supply end of the voltage sensor is connected with the power supply module, the signal output end of the voltage sensor is connected with the signal input end of the main control MCU, and the detected voltage value of the power supply module is sent to the main control MCU in the form of the output of a voltage detection signal;
the motor rotor angle detection module comprises an angle sensor for detecting the angle of the motor rotor of the brushless motor, the power supply end of the angle sensor is connected with the LDO power converter, the signal output end of the angle sensor is connected with the signal input end of the main control MCU, and the detected rotor angle of the brushless motor is sent to the main control MCU in the form of the output of an angle detection signal;
the main control MCU processes and analyzes any signal, determines whether any signal meets a preset condition matched with any signal, and generates and outputs an alarm signal if any signal does not meet the preset condition, wherein any signal comprises a torque signal, a steering wheel angle signal, a voltage detection signal, a temperature detection signal and an angle detection signal;
the fault alarm module comprises a buzzer and/or a flashing lamp, the power supply end of the buzzer and/or the flashing lamp is connected to the power supply module, and the signal input end of the buzzer and/or the flashing lamp is connected to the signal output end of the main control MCU so as to receive an alarm signal and output a response.
Through adopting above-mentioned technical scheme, when any kind of signal takes place unusually, show that current function module breaks down promptly, main control MCU collects and data processing torque signal, steering wheel angle signal, voltage detection signal, temperature detection signal and angle detection signal, whether the detected value of acquireing above-mentioned any kind of signal matches the preset condition corresponding with any kind of signal, if mismatch, to generating alarm signal to call control trouble alarm module and carry out audible and visual alarm, for example: the preset condition of the torque signal is not more than 1500 Nm, and if the torque force provided by the current torque signal is 1600 Nm, the buzzer and/or the flashing lamp give an alarm response, so that the effects of detecting faults in real time and executing alarm are achieved.
Optionally, the angle sensor further comprises a communication module, a power supply end of the communication module is connected to an output end of the LDO power converter, and a signal input end of the communication module is connected to a communication output end of the angle sensor and used for carrying out data communication on data of the angle sensor and the mobile terminal.
By adopting the technical scheme, when a user uses the system, the data measured by the angle sensor is transmitted to the mobile terminal of the user through the communication module, so that the user can check the data, and the user can conveniently control the angle data of the motor rotor.
Optionally, the master control MCU is further connected with a display screen for displaying real-time information of any signal, and the communication input end of the master control MCU is connected with a touch screen for setting a preset condition of any signal.
Through adopting above-mentioned technical scheme, the display screen can come out the data display of any kind of signal of the aforesaid, and the staff of being convenient for watches, has promoted the convenience and the practicality of system, and the setting up of touch-sensitive screen helps the preset condition of any kind of signal of master control MCU input simultaneously, has improved the practicality of system.
Optionally, the control method for high-voltage electric power steering is characterized by comprising:
acquiring power supply information of the power supply module, the torque sensor, the steering wheel angle sensor, the main control MCU and the drive chip, and setting voltage conversion specifications of the DC/DC power converter and the LDO power converter based on the power supply information;
acquiring a torque signal and a torque angle signal of a steering wheel based on the torque sensor and the steering wheel angle sensor;
the main control MCU generates execution data based on processing and analyzing the torque signal and the torque angle signal, and sends the execution data to the drive chip, and the drive chip generates an execution signal based on data processing of the execution data;
the signal input end of the motor drive three-phase bridge is connected with the signal output end of the drive chip to receive the execution signal, and the output end of the motor drive three-phase bridge is connected with the power supply end of the brushless motor to control the voltage output frequency of the power supply module to the brushless motor and adjust the angle of the motor rotor of the brushless motor.
By adopting the technical scheme, when the motor power-assisted steering system is used, the working voltage requirements of each module are firstly detected, the voltage provided by the power supply module is regulated by using the voltage regulating module according to the working voltage requirements, then the torque and the angle of the steering wheel are detected by using the first detection module and the second detection module to obtain the torque signal and the steering wheel angle signal, then the processing module processes and analyzes the torque signal and the steering wheel angle signal to determine the torque force and the steering angle of the current steering wheel and output the torque force and the steering angle to the execution module to send the execution signal, and finally the execution module controls the motor according to the execution signal to complete the realization of the motor power-assisted steering The motor power-assisted steering system has the advantages of reducing failure risks, saving installation space, reducing usage heat and the like, and achieves the effect of improving the working efficiency of the motor power-assisted steering system.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the motor power-assisted steering system is used, firstly, the working voltage requirements of each module are detected, the voltage provided by the power supply module is regulated by using the voltage regulating module according to the working voltage requirements, then, the torque and the angle of the steering wheel are detected by the first detection module and the second detection module to obtain a torque signal and a steering wheel angle signal, then, the processing module performs processing analysis according to the torque signal and the direction angle signal to determine the torque force and the direction torsion angle of the current steering wheel and output an execution signal to the execution module, and finally, the execution module performs control on the motor according to the execution signal to complete the realization of the motor power-assisted steering system. The effect of improving the working efficiency of the motor power-assisted steering system is achieved;
2. when any kind of signal takes place unusually, show that current function module breaks down promptly, main control MCU collects and data processing torque signal, steering wheel angle signal, voltage detection signal, temperature detection signal and angle detection signal, whether the detected value of above-mentioned any kind of signal matches the preset condition corresponding with any kind of signal, if mismatch, to generating alarm signal to call control failure alarm module and carry out audible and visual alarm, for example: the preset condition of the torque signal is not more than 1500 nm, and if the torque force provided by the current torque signal is 1600 nm, the buzzer and/or the flashing lamp give an alarm response, so that the effects of detecting faults in real time and executing alarm are achieved;
3. when accessing the sensor, the main control MCU sends an 8-bit register pointer, and then sends the address of the sensor (7-bit address, the low bit is WR signal), i.e. the output end of the sensor. There are 3 registers available to the master MCU in the sensor and an 8-bit register pointer is used to determine which register the master MCU will use. In the scheme, the main control MCU accesses the torque sensor and the steering wheel angle sensor simultaneously, the measured values of the two sensors are read, after the main control MCU reads the measured values of the sensors, the measured values are converted and processed, processed data are sent to the driving chip, the driving chip generates an execution instruction according to the data processed by the main control MCU and sends the execution instruction to the execution unit in the form of an execution signal, and therefore the effect of controlling the execution unit is achieved.
Drawings
FIG. 1 is a schematic voltage regulation diagram of an electric power steering control system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of detection communication of an electric power steering control system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an electric power steering control system method according to an embodiment of the present disclosure.
Description of reference numerals: 1. a power supply module; 2. a voltage regulating module; 3. a first detection module; 4. a second detection module; 5. a processing module; 6. an execution module; 7. a temperature detection module; 8. a power supply voltage detection module; 9. a motor rotor angle detection module; 10. a fault alarm module; 11. a communication module; 12. a display screen; 13. a touch screen.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-3 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The embodiment of the application discloses an electric power steering control system, and with reference to fig. 1, the electric power steering control system comprises a power supply module 1, a voltage regulating module 2, a first detection module 3, a second detection module 4, a processing module 5 and an execution module 6.
In the embodiment of the application, the power supply module 1 comprises a storage battery, the voltage specification of the storage battery is 48V-72V, and the output end of the storage battery is connected with the power supply ends of the voltage regulating module 2 and the execution module 6 respectively to provide electric energy.
As an alternative implementation manner of this embodiment, referring to fig. 1, the voltage regulation module 2 includes a DC/DC power converter and an LDO power converter, an input end of the DC/DC power converter is connected to an output end of the storage battery, an input end of the LDO power converter is connected to an output end of the DC/DC power converter, wherein the DC/DC power converter is a power converter that converts an input voltage and effectively outputs a fixed voltage, and the DC/DC converter is classified into three types: a step-up DC/DC converter, a step-down DC/DC converter, and a step-up/step-down DC/DC converter. In the embodiment of the present application, the DC/DC power converter is a step-down DC/DC converter, which aims to reduce the input voltage of the battery (i.e. convert the voltage of the battery 48V to 72V into a constant voltage of 12V), and the LDO power converter is a low dropout regulator, in the embodiment of the present application, the LDO power converter converts the constant voltage of 12V output by the DC/DC power converter into a voltage of 3.3V and a voltage of 5V, and provides the working voltage for the following first detection module 3, second detection module 4, and processing module 5.
As an alternative to this embodiment, referring to fig. 1, the first detection module 3 includes a torque sensor, which detects the torque sensing of various rotating or non-rotating mechanical components and converts the physical change of the torque into an accurate electrical signal. In this application embodiment, torque sensor's supply end is connected in LDO power converter 3.3V's output for measure the torque force of steering wheel, and send the torque force that detects to processing module 5 with the form of signal of telecommunication, thereby reached the effect of collecting steering wheel torque force.
As an optional implementation manner of this embodiment, referring to fig. s, the second detecting module 4 includes a steering wheel angle sensor, the steering wheel angle sensor mainly measures a "rotation angle" of a steering wheel when an automobile turns, the steering wheel angle sensor is in a multi-turn absolute angle output manner, and can detect an "absolute angle" when the steering wheel rotates in multiple turns, in this embodiment, a power supply end of the steering wheel angle sensor is connected to an output end of the LDO power converter 3.3V, the steering wheel angle sensor detects a twisting direction of the steering wheel, and sends a detected steering wheel angle signal to the processing module 5 in the form of an electrical signal, so as to achieve an effect of collecting a twisting angle of the steering wheel.
As an optional implementation manner of this embodiment, referring to fig. 1, the processing module 5 includes a main control MCU and a driver chip, power supply terminals of the main control MCU and the driver chip are respectively connected to output terminals of the LDO power converters 5V and 3V, the main control MCU performs logic processing analysis on the torque signal and the direction angle signal, and sends the processed execution data to the driver chip, and the driver chip generates and outputs the execution signal after receiving the execution data. When accessing the sensor, the main control MCU sends an 8-bit register pointer, and then sends the address of the sensor (7-bit address, the low bit is WR signal), i.e. the output end of the sensor. There are 3 registers available to the master MCU in the sensor and an 8-bit register pointer is used to determine which register the master MCU will use. In the scheme, the main control MCU accesses the torque sensor and the steering wheel angle sensor simultaneously, the measured values of the two sensors are read, after the main control MCU reads the measured values of the sensors, the measured values are converted and processed, processed data are sent to the driving chip, the driving chip generates an execution instruction according to the data processed by the main control MCU and sends the execution instruction to the execution unit in the form of an execution signal, and therefore the effect of controlling the execution unit is achieved. .
As an alternative implementation manner of this embodiment, referring to fig. 1, the execution module 6 includes a motor-driven three-phase bridge and a brushless motor, a signal input end of the motor-driven three-phase bridge is connected to a signal output end of the driving chip to receive the execution signal, and an output end of the motor-driven three-phase bridge is connected to a power supply end of the brushless motor to control a voltage output frequency of the power supply module 1 to the brushless motor, so as to adjust a motor rotor angle of the brushless motor. After receiving the execution signal, the motor-driven three-phase bridge performs frequency control in a mode of changing the PWM duty ratio according to the execution signal at a fixed frequency, and inputs the adjusted PWM duty ratio to the brushless motor, and the brushless motor provides power for steering after receiving the adjusted voltage, thereby achieving the effect of flexible control.
Referring to fig. 2, as an alternative implementation manner of this embodiment, an electric power steering control system further includes a temperature detection module 7, a power supply voltage detection module 8, a motor rotor angle detection module 9, and a fault alarm module 10.
Specifically, referring to fig. 2, temperature detecting module 7 includes a temperature sensor for detecting the temperature of the motor-driven three-phase bridge, a power supply terminal of the temperature sensor is connected to the 3.3V output terminal of the LDO power converter, a signal output terminal of the temperature sensor is connected to the signal output terminal of the main control MUC, and the detected temperature value of the motor-driven three-phase bridge is sent to the main control MCU in the form of an output of a temperature detection signal. The power supply voltage detection module 8 comprises a voltage sensor for detecting the voltage of the power supply module 1, the power supply end of the voltage sensor is connected to the power supply module 1, the signal output end of the voltage sensor is connected to the signal input end of the main control MCU, and the detected voltage value of the power supply module 1 is transmitted to the main control MCU in the form of the output of a voltage detection signal. Motor rotor angle detection module 9 is including the angle sensor who is used for detecting brushless motor's motor rotor angle, and angle sensor's feed end is connected in LDO power converter 3.3V's output, and angle sensor's signal output part is connected in master control MCU's signal input part to the rotor angle that will detect brushless motor is to sending master control MCU with the output form of angle detection signal.
For the content of the above embodiments, in the present application, the main control MCU processes and analyzes any signal, determines whether any signal satisfies a preset condition matching with any signal, and generates and outputs an alarm signal if any signal does not satisfy the preset condition, where any signal includes a torque signal, a steering wheel angle signal, a voltage detection signal, a temperature detection signal, and an angle detection signal.
Specifically, the fault alarm module 10 includes a buzzer and/or a flashing light, a power supply terminal of the buzzer and/or the flashing light is connected to the power supply module 1, and a signal input terminal of the buzzer and/or the flashing light is connected to a signal output terminal of the main control MCU to receive the alarm signal and output a response.
When any kind of signal takes place unusually, show that current function module breaks down promptly, main control MCU collects and data processing torque signal, steering wheel angle signal, voltage detection signal, temperature detection signal and angle detection signal, whether the detected value of above-mentioned any kind of signal matches the preset condition corresponding with any kind of signal, if mismatch, to generating alarm signal to control failure alarm module 10 and carry out audible and visual alarm, for example: the preset condition of the temperature signal is not more than 80 ℃, and if the temperature detected by the current temperature detection signal is 85 ℃, the buzzer and/or the flashing lamp give an alarm response, so that the effects of detecting faults in real time and executing alarm are achieved.
As an alternative implementation manner of this embodiment, referring to fig. 2, the communication module 11 includes CAN communication, which is composed of data frames, remote control frames, error frames, overload frames and interval frames, wherein the data frame is a frame for the transmitting unit to transmit data to the receiving unit, the remote control frame is a frame for the receiving unit to request data from the transmitting unit having the same ID, the error frame is a frame for notifying an error to the other units when an error is detected, the overload frame is a frame for the receiving unit to notify that it is not ready to receive, the gap frame is a frame for separating the data frame and the remote control frame from the previous frame, in this application embodiment, the power supply end of the CAN communication is connected to the output end of the LDO power converter 3.3V, and the data frame of the CAN communication and the output end of the angle sensor are used for performing data communication on the data acquired by the angle sensor and the mobile terminal. When the user uses the system, the data measured by the angle sensor is transmitted to the mobile terminal of the user through the communication module 11 for the user to check the data, so that the user can conveniently control the system data.
As an optional implementation manner of this embodiment, refer to fig. 2, the master control MCU is further connected with the display screen 12, main control MCU and display screen 12 are connected through CAN communication, so that the display screen 12 displays real-time information of any kind of signals, the communication input end of the master control MCU is connected with the touch screen 13, the power supply end of the touch screen 13 is connected to the output end of the LDO power converter 5V, the preset condition of any kind of signals is set, the display screen 12 CAN display the data of any kind of signals, and the system is convenient for a worker to watch, so that convenience and practicability of the system are improved, meanwhile, the setting of the touch screen 13 is helpful to input the preset condition of any kind of signals to the master control MCU, and the practicability of the system is improved.
The embodiment of the application also discloses an electric power steering control method applying the embodiment. Referring to fig. 3, an electric power steering control method mainly includes the steps of:
step S10, acquiring power supply information of the power supply module 1, the torque sensor, the steering wheel angle sensor, the main control MCU and the drive chip, and setting voltage conversion specifications of the DC/DC power converter and the LDO power converter based on the power supply information;
step S11, acquiring a torque signal and a torque angle signal of a steering wheel based on a torque sensor and a steering wheel angle sensor;
step S12, the main control MCU processes and analyzes the torque signal and the torque angle signal to generate execution data, and sends the execution data to the drive chip, and the drive chip processes the execution data to generate an execution signal;
and step S13, connecting the signal input end of the motor driving three-phase bridge with the signal output end of the driving chip to receive the execution signal, and connecting the output end of the motor driving three-phase bridge with the power supply end of the brushless motor to adjust the motor rotor angle of the brushless motor.
The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (10)
1. An electric power steering control system comprising: the power supply device comprises a power supply module (1), a voltage regulating module (2), a first detection module (3), a second detection module (4), a processing module (5) and an execution module (6), wherein the power supply module (1) is respectively connected with power supply ends of the voltage regulating module (2) and the execution module (6) and is used for providing electric energy;
the voltage regulating module (2) is used for regulating the voltage provided by the power supply module (1);
the first detection module (3) is connected to the output end of the pressure regulating module (2) and used for detecting the torque force of the steering wheel and outputting a torque signal;
the second detection module (4) is connected to the output end of the voltage regulating module (2) and is used for detecting the torsion angle of the steering wheel and outputting a steering wheel angle signal;
the processing module (5) is connected to the output ends of the first detection module (3) and the second detection module (4) and is used for receiving the torque signal and the steering wheel angle signal, processing and analyzing the torque signal and the steering wheel angle signal and outputting an execution signal;
and the execution module (6) is connected to the signal output end of the execution module (6) and used for receiving and responding to the execution signal and controlling the motor.
2. An electric power steering control system according to claim 1, characterized in that: the voltage regulation module (2) comprises a DC/DC power converter and an LDO power converter, the power supply end of the DC/DC power converter is connected to the power supply module (1), the voltage of the power supply module (1) is regulated to be the standard voltage of the LDO power converter, the power supply end of the LDO power converter is connected to the standard voltage after conversion, the working voltage is regulated for the second time, and the working voltage which is satisfied with the first detection module (3), the second detection module (4) and the processing module (6) is obtained.
3. An electric power steering control system according to claim 2, characterized in that: the first detection module (3) comprises a torque sensor for detecting the torque force of the steering wheel, the power supply end of the torque sensor is connected to the output end of the LDO power converter, and the detected torque force is sent to the processing module (5) in the form of output of a torque signal.
4. An electric power steering control system according to claim 3, characterized in that: the second detection module (4) comprises a steering wheel angle sensor for detecting the rotation angle of the steering wheel, the power supply end of the steering wheel angle sensor is connected to the output end of the LDO power converter, and the detected rotation angle of the steering wheel is sent to the processing module (5) in the output form of a steering wheel angle signal.
5. An electric power steering control system according to claim 4, characterized in that: the processing module (5) comprises a main control MCU and a drive chip, wherein the main control MCU and the drive chip are used for receiving a torque signal and a steering wheel angle signal, the power supply ends of the main control MCU and the drive chip are connected to the output end of the LDO power converter, the main control MCU carries out logic processing analysis on the torque signal and the direction angle signal and sends processed execution data to the drive chip, and the drive chip generates and outputs the execution signal after receiving the execution data.
6. An electric power steering control system according to claim 5, characterized in that: execution module (6) are including motor drive three-phase bridge and brushless motor, and the feed end of motor drive three-phase bridge is connected in power module (1), and the signal input part of motor drive three-phase bridge is connected with driver chip's signal output part to receive the execution signal, the output of motor drive three-phase bridge is connected in brushless motor's feed end.
7. An electric power steering control system according to claim 6, characterized in that: the device also comprises a temperature detection module (7), a power supply voltage detection module (8), a motor rotor angle detection module (9) and a fault alarm module (10);
the temperature detection module (7) comprises a temperature sensor for detecting the temperature of the motor-driven three-phase bridge, the power supply end of the temperature sensor is connected with the LDO power converter, the signal output end of the temperature sensor is connected with the signal output end of the main control MUC, and the detected temperature value of the motor-driven three-phase bridge is sent to the main control MCU in the form of the output of a temperature detection signal;
the power supply voltage detection module (8) comprises a voltage sensor for detecting the voltage of the power supply module (1), the power supply end of the voltage sensor is connected to the power supply module (1), the signal output end of the voltage sensor is connected to the signal input end of the main control MCU, and the detected voltage value of the power supply module (1) is sent to the main control MCU in the form of the output of a voltage detection signal;
the motor rotor angle detection module (9) comprises an angle sensor for detecting the angle of the motor rotor of the brushless motor, the power supply end of the angle sensor is connected with the LDO power converter, the signal output end of the angle sensor is connected with the signal input end of the main control MCU, and the detected rotor angle of the brushless motor is sent to the main control MCU in the form of the output of an angle detection signal;
the main control MCU processes and analyzes any signal, determines whether any signal meets a preset condition matched with any signal, and generates and outputs an alarm signal if any signal does not meet the preset condition, wherein any signal comprises a torque signal, a steering wheel angle signal, a voltage detection signal, a temperature detection signal and an angle detection signal;
the fault alarm module (10) comprises a buzzer and/or a flashing lamp, the power supply end of the buzzer and/or the flashing lamp is connected to the power supply module (1), and the signal input end of the buzzer and/or the flashing lamp is connected to the signal output end of the main control MCU so as to receive an alarm signal and output a response.
8. An electric power steering control system according to claim 5, characterized in that: still include communication module (11), communication module (11)'s supply end is connected in LDO power converter's output, and communication module (11)'s signal input part is connected in angle sensor's output for carry out data communication with angle sensor's data and mobile terminal.
9. An electric power steering control system according to claim 7, characterized in that: the master control MCU is also connected with a display screen (12) for displaying the real-time information of any kind of signals, and the communication input end of the master control MCU is connected with a touch screen (13) for setting the preset conditions of any kind of signals.
10. An electric power steering control method according to any one of claims 1 to 6, characterized by comprising:
acquiring power supply information of the power supply module (1), the torque sensor, the steering wheel angle sensor, the main control MCU and the drive chip, and setting voltage conversion specifications of the DC/DC power converter and the LDO power converter based on the power supply information;
acquiring a torque signal and a torque angle signal of a steering wheel based on the torque sensor and the steering wheel angle sensor;
the main control MCU generates execution data based on processing and analyzing the torque signal and the torque angle signal, and sends the execution data to the drive chip, and the drive chip generates an execution signal based on data processing of the execution data;
the signal input end of the motor-driven three-phase bridge is connected with the signal output end of the driving chip to receive the execution signal, and the output end of the motor-driven three-phase bridge is connected with the power supply end of the brushless motor to adjust the angle of the motor rotor of the brushless motor.
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