CN114992320A - Torque distribution calibration system and method - Google Patents
Torque distribution calibration system and method Download PDFInfo
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- CN114992320A CN114992320A CN202210701474.3A CN202210701474A CN114992320A CN 114992320 A CN114992320 A CN 114992320A CN 202210701474 A CN202210701474 A CN 202210701474A CN 114992320 A CN114992320 A CN 114992320A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/48—Inputs being a function of acceleration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/52—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on the weight of the machine, e.g. change in weight resulting from passengers boarding a bus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/58—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on signals from the steering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H2061/0053—Initializing the parameters of the controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The embodiment of the invention discloses a torque distribution calibration system and method. The system comprises: the system comprises a transmission shaft, a transfer case connected with the transmission shaft, a transfer case control unit connected with the transfer case, at least one torque sensor connected with the transmission shaft, a calibration computer connected with each torque sensor and a traveling computer connected with the transfer case control unit; the traveling crane computer is used for sending a torque theoretical signal to the transfer case control unit so as to enable the transfer case control unit to control the transfer case to distribute torque for the transmission shaft according to the torque theoretical signal; the torque sensor is used for acquiring a torque actual signal corresponding to the transmission shaft connected with the transfer case after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal and sending the torque actual signal to the calibration computer; and the calibration computer is used for calibrating the distributed torque of the actuator based on the torque theoretical signal and the received torque actual signal.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle control, in particular to a torque distribution calibration system and method.
Background
The four-wheel drive system can improve the running performance of the vehicle and the driving experience, and the driving experience of the whole vehicle is directly determined by the performance of the four-wheel drive system. The four-wheel drive system comprises a transfer case, a transmission shaft connected with the transfer case and a transfer case control unit, wherein the transfer case control unit is used for sending a torque signal to the transfer case so that the transfer case transmits and distributes torque to the transmission shaft according to the torque signal, and the torque transmission precision between the transfer case and the transmission shaft becomes an important index reflecting the performance of the system at present.
In order to ensure that the torque transmission precision meets the required precision requirement, calibration operation needs to be carried out on the torque transmitted and distributed by the front axle and the rear axle. At present, the adopted calibration mode is that a vehicle running signal transmitted on a bus is collected by a running computer, the torque of a transmission shaft of a current vehicle is determined as an actual distribution torque based on the vehicle running signal and vehicle operation parameters, and the torque distributed to the transmission shaft by a brake is calibrated according to the actual distribution torque.
However, in the prior art, the actual distributed torque is reversely calculated through the vehicle running signal and the vehicle running parameter, and the calculation result is easily interfered, so that the determined actual distributed torque is not accurate, and the precision of the calibration result is reduced.
Disclosure of Invention
The embodiment of the invention provides a torque distribution calibration system and method, aiming at achieving the purpose of improving calibration precision.
In a first aspect, an embodiment of the present invention provides a torque distribution calibration system, including: the system comprises a transmission shaft, a transfer case connected with the transmission shaft, a transfer case control unit connected with the transfer case, at least one torque sensor connected with the transmission shaft, a calibration computer connected with each torque sensor, and a traveling computer connected with the transfer case control unit;
the traveling crane computer is used for sending the torque theoretical signal to the transfer case control unit so as to enable the transfer case control unit to control the transfer case to distribute torque for the transmission shaft according to the torque theoretical signal;
the torque sensor is used for acquiring a torque actual signal corresponding to a transmission shaft connected with the transfer case after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal, and sending the torque actual signal to the calibration computer;
and the calibration computer is used for calibrating the distributed torque of the transfer case based on the torque theoretical signal and the received torque actual signal.
In a second aspect, an embodiment of the present invention further provides a torque distribution calibration method, which is applied to a torque distribution calibration system, where the system includes: the system comprises a transmission shaft, a transfer case connected with the transmission shaft, a transfer case control unit connected with the transfer case, at least one torque sensor connected with the transmission shaft, a calibration computer connected with each torque sensor, and a traveling crane computer connected with the transfer case control unit; the torque distribution calibration method comprises the following steps:
the torque theoretical signal is sent to a transfer case control unit through the traveling crane computer, so that the transfer case control unit controls the transfer case to distribute torque for a transmission shaft according to the torque theoretical signal;
after the transfer case distributes torque for a transmission shaft according to the torque theoretical signal through the torque sensor, acquiring a torque actual signal corresponding to the transmission shaft connected with the transfer case, and sending the torque actual signal to the calibration computer;
and calibrating the distributed torque of the transfer case by the calibration computer based on the torque theoretical signal and the received torque actual signal.
The embodiment of the invention provides a torque distribution calibration system, which comprises: the system comprises a transmission shaft, a transfer case connected with the transmission shaft, a transfer case control unit connected with the transfer case, at least one torque sensor connected with the transmission shaft, a calibration computer respectively connected with the transfer case control unit and each torque sensor, and a traveling computer connected with the transfer case control unit; the traveling crane computer is used for sending a torque theoretical signal to the transfer case control unit so as to enable the transfer case control unit to control the transfer case to distribute torque for the transmission shaft according to the torque theoretical signal; the torque sensor is used for acquiring a torque actual signal corresponding to the transmission shaft connected with the transfer case after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal and sending the torque actual signal to the calibration computer; and the calibration computer is used for calibrating the distributed torque of the actuator based on the torque theoretical signal and the received torque actual signal. The torque actual signal is directly determined through the torque sensor, the problem that the determination of the actual torque value is inaccurate in the prior art is solved, and the calibration result is favorably improved.
In addition, the torque distribution calibration method provided by the invention corresponds to the system and has the same beneficial effects.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a block diagram of a torque distribution calibration system provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a torque distribution calibration system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a calibration process according to an embodiment of the present invention;
FIG. 4 is a flowchart of a torque split calibration method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in the embodiment of the present invention, the torque sensor is connected to the transmission shaft to obtain the actual torque signal of the transmission shaft, so as to form the torque closed-loop control, and provide a reliable calibration mode for the calibration test. The embodiment of the invention is not only suitable for calibrating the transfer case, but also can be used for calibrating the distribution test of the engine torque, the pure electric vehicle motor torque and the wheel side motor torque, and the embodiment of the invention is not limited.
Example one
FIG. 1 is a block diagram of a torque distribution calibration system according to an embodiment of the present invention. As shown in fig. 1, the system of the present embodiment may specifically include: the system comprises a transmission shaft 101, a transfer case 102 connected with the transmission shaft 101, a transfer case control unit 103 connected with the transfer case 102, at least one torque sensor 104 connected with the transmission shaft 101, a calibration computer 105 connected with each torque sensor 104, and a traveling computer 106 connected with the transfer case control unit 103;
the traveling crane computer 106 is used for sending a torque theoretical signal to the transfer case control unit 103 so that the transfer case control unit 103 controls the transfer case 102 to distribute torque to the transmission shaft 101 according to the torque theoretical signal;
the torque sensor 104 is used for acquiring a torque actual signal corresponding to the transmission shaft connected with the transfer case 102 after the transfer case 102 distributes torque to the transmission shaft according to the torque theoretical signal, and sending the torque actual signal to the calibration computer 105;
and the calibration computer 105 is used for calibrating the distributed torque of the actuator 102 based on the torque theoretical signal and the received torque actual signal.
It should be noted that the transfer case control unit may send a torque signal to the transfer case based on the received control instruction, so that the transfer case transmits the distributed torque to the transmission shaft according to the torque signal. The present embodiment may connect the torque sensor with the transmission shaft to obtain a torque actual signal including a torque actual value of the transmission shaft. In order to improve the accuracy of the calibration result, the torque calibration can be carried out under different driving conditions, wherein the different driving conditions include but are not limited to the calibration of all-directional working conditions such as straight line, turning, uphill and downhill, starting with different accelerator opening degrees and the like on high and low road surfaces.
In this embodiment, the traveling computer 105 may determine a theoretical value of torque allocated to the transmission shaft by the transfer case in advance, generate a theoretical torque signal corresponding to the theoretical value of torque, and send the theoretical torque signal to the transfer case control unit, and after receiving the theoretical torque signal, the transfer case control unit may perform a motor action to press or release the clutch so that the transfer case allocates torque to the transmission shaft according to the theoretical torque signal.
After the transfer case distributes torque to the transmission shaft according to the torque theoretical signal, that is, when the transmission shaft rotates according to the distributed torque, a torque actual signal corresponding to a torque actual value generated by the transmission shaft can be acquired based on the torque sensor 104 connected with the transmission shaft, and the torque actual signal is sent to the calibration computer 105.
In implementations, the torque sensor may be a wireless sensor and/or a wired sensor. During the calibration process, the transmission shaft rotates according to the distributed torque, the wired sensor is connected with the transmission shaft, and the transmission inconvenience is possibly caused by determining the actual torque signal. In order to achieve better dynamic measurement and calibration, the torque sensor provided in this embodiment includes a flange-type wireless torque sensor, and the flange-type wireless torque sensor is installed at a preset disconnection position of the transmission shaft. It should be noted that the structure of the transmission shaft can be adjusted in advance, for example, the transmission shaft is disconnected, so that the transmission shaft is divided into two parts, the sensor is installed between the disconnected two parts of the transmission shaft, that is, at the preset disconnection position of the transmission shaft, so that the torque sensor can still conveniently acquire the actual torque signal in real time when the transmission shaft rotates.
In this embodiment, the calibration computer 105 may obtain the torque theoretical signal, determine the actual torque value and the theoretical torque value allocated to the transmission shaft based on the received actual torque signal and the received theoretical torque signal, determine calibration data based on a difference between the actual torque value and the theoretical torque value, and calibrate the allocated torque of the actuator.
In a specific implementation, the calibration computer includes a calibration unit, configured to generate calibration data when a torque actual value corresponding to the torque actual signal is inconsistent with a torque theoretical value corresponding to the torque theoretical signal, and update the pre-established distribution model based on the calibration data.
Specifically, when the actual torque value corresponding to the actual torque signal is consistent with the theoretical torque value corresponding to the theoretical torque signal, it is indicated that the operation of the transfer case for distributing the torque to the transmission shaft is error-free or the error is within a preset range, and calibration is not needed; when the actual torque value corresponding to the actual torque signal is inconsistent with the theoretical torque value corresponding to the theoretical torque signal, it is indicated that an error in the operation of distributing the torque by the transmission shaft exceeds a preset range, a calibration condition is reached, and calibration is required.
Further, when calibration is required, calibration data may be generated based on the actual torque value and the theoretical torque value. For example, the process of generating the calibration data may be calculating the difference, the squared difference, the standard deviation, and the like of the actual torque value and the theoretical torque value, and finally determining the calibration data. In a specific implementation, a distribution model can be established in advance, and the transfer case can distribute torque to the transmission shaft according to the distribution model. When calibration is performed, the assignment model may be adjusted and updated based on the calibration data to complete the calibration process.
In this embodiment, the traveling computer is further configured to obtain an operation parameter of the target vehicle before sending the theoretical torque signal to the transfer case control unit, determine a theoretical torque value based on the operation parameter, and generate the theoretical torque signal based on the theoretical torque value;
wherein the operation parameters include at least one of vehicle weight, operation attitude, operation temperature, speed, acceleration, tire-to-ground adhesion coefficient, accelerator position, throttle opening, and steering wheel angle. The target vehicle is a vehicle to which the propeller shaft belongs.
In order to more accurately determine the torque theoretical value to be distributed to the transmission shaft when the operation requirement of the target vehicle is met, the driving computer can determine the torque theoretical value in advance based on the operation parameters of the target vehicle. Furthermore, a torque theoretical value can be determined according to the road condition of the target vehicle during calibration, such as the slope, angle, driving direction, camber and the like of the driving road; and generating a torque theory signal including the torque theory value.
In specific implementation, in order to ensure that the current performance of the four-wheel drive system can realize a torque theoretical value corresponding to the torque theoretical signal and smoothly complete the calibration process, the driving computer is further used for generating alarm information to prompt when the torque theoretical value exceeds a preset torque maximum value.
Specifically, the maximum torque value which can be provided by the current performance of the four-wheel drive system can be determined, when the determined torque theoretical value exceeds the predetermined torque maximum value, it is indicated that the four-wheel drive system cannot provide the torque theoretical value for the transmission shaft at present, effective calibration operation cannot be performed, an alarm message can be generated and sent to a worker terminal for prompting that the current calibration operation is wrong, a calibration process cannot be performed normally, and manual adjustment can be performed on the torque theoretical value.
The embodiment of the invention provides a torque distribution calibration system, which comprises: the system comprises a transmission shaft, a transfer case connected with the transmission shaft, a transfer case control unit connected with the transfer case, at least one torque sensor connected with the transmission shaft, a calibration computer connected with each torque sensor and a traveling computer connected with the transfer case control unit; the traveling crane computer is used for sending a torque theoretical signal to the transfer case control unit so as to enable the transfer case control unit to control the transfer case to distribute torque for the transmission shaft according to the torque theoretical signal; the torque sensor is used for acquiring a torque actual signal corresponding to the transmission shaft connected with the transfer case after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal and sending the torque actual signal to the calibration computer; and the calibration computer is used for calibrating the distributed torque of the actuator based on the torque theoretical signal and the received torque actual signal. The torque actual signal is directly determined through the torque sensor, the problem that the determination of the actual torque value is inaccurate in the prior art is solved, and the calibration result is favorably improved.
Example two
Fig. 2 is a schematic diagram of a torque distribution calibration system according to an embodiment of the present invention. As shown in fig. 2, the four-wheel drive system further includes an engine 201 connected to a transfer case 204. Optionally, the transmission shafts in the four-wheel drive system include a forward transmission shaft 203 and a backward transmission shaft 205, the torque sensor includes a forward torque sensor 202 and a backward torque sensor 206, the forward torque sensor 202 is connected with the forward transmission shaft 203, and the backward torque sensor 206 is connected with the backward transmission shaft 205;
the forward torque sensor 202 is used for acquiring a forward torque actual signal corresponding to the forward transmission shaft 203 after the transfer case 204 distributes torque to the transmission shaft according to the torque theoretical signal, and sending the forward torque actual signal to the calibration computer;
the backward torque sensor 206 is used for acquiring a backward torque actual signal corresponding to the backward transmission shaft 205 after the transfer case 204 distributes torque to the transmission shaft according to the torque theoretical signal, and sending the backward torque actual signal to the calibration computer;
and the calibration computer is used for calibrating the distributed torque of the actuator 204 based on the torque theoretical signal, the received forward torque actual signal and the received backward torque actual signal.
In the present embodiment, the forward torque sensor 202 may acquire a forward torque actual signal of the forward rotating shaft 203, and the backward torque sensor 206 may acquire a backward torque actual signal. The calibration computer determines a forward torque actual value through the forward torque actual signal, determines a backward torque actual value through the backward torque actual signal, can perform calculation such as addition or weighted summation on the forward torque actual value and the backward torque actual value to determine a torque actual value of the transmission shaft, and compares the torque actual value with a torque theoretical value to obtain calibration data.
In a specific implementation, the torque sensor comprises at least one signal generation unit connected with the transmission shaft and a power supply unit connected with the signal generation unit; the system also comprises a signal integration unit connected with the calibration computer; the power supply unit is used for supplying power to the signal generation unit; the signal generating unit is used for acquiring a torque actual signal corresponding to the transmission shaft after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal, and sending the torque actual signal to the signal integrating unit; and the signal integration unit is used for carrying out format conversion on the received at least one torque actual signal according to a preset format requirement and sending the torque actual signal obtained after the format conversion to the calibration computer.
In specific implementation, the signal generating unit starts to operate when the power supply unit provides power, so as to obtain a torque actual signal corresponding to the transmission shaft, and send the torque actual signal to the signal integrating unit. The signal integration unit can perform format conversion according to preset format requirements, wherein the preset format requirements can be any one of formats which can be processed by a traveling computer, so that the signal processing by a calibration computer is facilitated. Furthermore, because the signal collected by the torque sensor is a voltage signal, the received actual torque signal can be converted into an electric signal which can be processed by a calibration computer through the signal integration unit.
Optionally, the signal integration unit includes a signal sending subunit; and the signal sending subunit is used for sending the actual torque signal obtained after the format conversion to the calibration computer in a bus communication mode. The signal is transmitted in a bus communication mode, and the signal transmission process can be completed more quickly and conveniently. For example, the signal integration unit can process the actual torque signal into a format capable of being processed by the calibration computer according to a vehicle communication protocol and send the format to the bus, so that the format-converted actual torque signal is transmitted to the calibration computer.
In the present embodiment, the power supply unit includes a power supply unit rotor coil and a power supply unit stator coil; the power supply unit stator coil is used for providing a magnetic field for the power supply unit rotor coil under the action of a vehicle-mounted power supply; and the power supply unit rotor coil is used for moving in the magnetic field and generating induction current to supply power for the signal generation unit.
Specifically, the power supply unit can be installed and fixed on a chassis bracket of a target vehicle, and a high-frequency alternating magnetic field is generated inside the coil through a vehicle-mounted power supply; the signal generating unit and the power supply unit rotor coil are arranged on the torque sensor, and the signal generating unit and the power supply unit generate induced electromotive force to supply power to the signal generating unit through interaction with the alternating magnetic field.
In order to be able to clearly illustrate the solution of the embodiment of the present invention in more detail, as shown in fig. 3, the calibration process is as follows: the vehicle parameters are detected by a running computer to judge the four-wheel drive requirement, and the vehicle parameters can be at least one of the running parameters of the vehicle, such as speed, acceleration, the coefficient of adhesion of tires to the ground, the position of an accelerator, the opening degree of a throttle valve and the rotation angle of a steering wheel. Determining and providing required torque through operation parameters, namely determining a torque theoretical value; and generating a torque theory signal based on the torque theory value and sending the torque theory signal to the transfer case control unit, thereby controlling the motor to act so that the transfer case distributes torque to a front/rear axle, namely a front transmission shaft and a rear transmission shaft. The torque signal generating unit in the torque sensor is used for acquiring a torque actual signal of a transmission shaft, the signal receiving unit is used for acquiring the torque actual signal, the torque actual signal is sent to the signal integrating unit for format conversion, the actual torque signal obtained after conversion is sent to the calibration computer, the calibration computer is used for determining an actual torque value, whether the actual torque value is consistent with a required value or not is determined, calibration is not needed when the actual torque value is consistent with the required value, calibration data can be generated when the actual torque value is inconsistent with the required value and stored in a pre-established control model, so that the torque can be distributed according to the calibrated data. The calibration process can be repeated for a plurality of times, and the calibration data obtained each time are stored in the control model.
The torque sensor can be installed on the forward transmission shaft and the backward transmission shaft by modifying the forward transmission shaft and the backward transmission shaft, the actual torque signal of the transmission shaft is acquired through the torque sensor, and the actual torque signal is fed back to the calibration computer through the signal integration unit according to the preset format requirement, so that torque closed-loop control is formed, and the calibration accuracy is greatly improved.
It should be noted that, in the embodiment of the torque distribution calibration system, the units and modules included in the embodiment are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
EXAMPLE III
FIG. 4 is a flowchart of a torque split calibration method according to an embodiment of the present invention. The method is applied to a torque distribution calibration system, and the system comprises the following steps: the system comprises a transmission shaft, a transfer case connected with the transmission shaft, a transfer case control unit connected with the transfer case, at least one torque sensor connected with the transmission shaft, a calibration computer connected with each torque sensor and a traveling computer connected with the transfer case control unit; the torque distribution calibration method comprises the following steps:
and S110, transmitting a torque theoretical signal to the transfer case control unit through a traveling computer, so that the transfer case control unit controls the transfer case to distribute torque for the transmission shaft according to the torque theoretical signal.
And S120, acquiring a torque actual signal corresponding to the transmission shaft connected with the transfer case after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal through the torque sensor, and sending the torque actual signal to a calibration computer.
And S130, calibrating the distributed torque of the actuator through a calibration computer based on the torque theoretical signal and the received torque actual signal.
On the basis of any optional technical scheme in the embodiment of the invention, optionally, the transmission shaft comprises a forward transmission shaft and a backward transmission shaft, the torque sensor comprises a forward torque sensor and a backward torque sensor, the forward torque sensor is connected with the forward transmission shaft, and the backward torque sensor is connected with the backward transmission shaft;
after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal through the forward torque sensor, acquiring a forward torque actual signal corresponding to the forward transmission shaft, and sending the forward torque actual signal to a calibration computer;
acquiring a backward torque actual signal corresponding to a backward transmission shaft after the torque is distributed to the transmission shaft by the transfer case according to the torque theoretical signal through the backward torque sensor, and sending the backward torque actual signal to a calibration computer;
and calibrating the distributed torque of the actuator by a calibration computer based on the torque theoretical signal, the received forward torque actual signal and the received backward torque actual signal.
On the basis of any optional technical scheme in the embodiment of the invention, optionally, the torque sensor comprises a flange-type wireless torque sensor, and the flange-type wireless torque sensor is installed at a preset disconnection position of the transmission shaft.
On the basis of any optional technical scheme in the embodiment of the invention, optionally, the torque sensor comprises at least one signal generating unit connected with the transmission shaft and a power supply unit connected with the signal generating unit; the system also comprises a signal integration unit connected with the calibration computer;
the power supply unit is used for providing power supply for the signal generating unit;
after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal through the signal generating unit, acquiring a torque actual signal corresponding to the transmission shaft, and sending the torque actual signal to the signal integrating unit;
and carrying out format conversion on the received at least one actual torque signal according to a preset format requirement through a signal integration unit, and sending the actual torque signal obtained after the format conversion to a calibration computer.
On the basis of any optional technical scheme in the embodiment of the invention, optionally, the power supply unit comprises a power supply unit rotor coil and a power supply unit stator coil;
a stator coil of the power supply unit provides a magnetic field for a rotor coil of the power supply unit under the action of a vehicle-mounted power supply;
the rotor coil moves in the magnetic field through the power supply unit and generates an induced current to supply power to the signal generation unit.
On the basis of any optional technical solution in the embodiment of the present invention, optionally, the signal integration unit includes a signal sending subunit;
and transmitting the actual torque signal obtained after the format conversion to a calibration computer in a bus communication mode through a signal transmitting subunit.
On the basis of any optional technical scheme in the embodiment of the invention, the optional traveling computer is further configured to obtain an operation parameter of the target vehicle before sending the torque theoretical signal to the transfer case control unit, determine a torque theoretical value based on the operation parameter, and generate the torque theoretical signal based on the torque theoretical value;
wherein the operation parameters comprise at least one of vehicle weight, operation attitude, operation temperature, speed, acceleration, tire-to-ground adhesion coefficient, accelerator position, throttle opening and steering wheel angle.
On the basis of any optional technical scheme in the embodiment of the present invention, optionally, the method further includes:
and generating alarm information for prompting by a traveling computer when the torque theoretical value exceeds a preset maximum torque value.
On the basis of any optional technical scheme in the embodiment of the invention, optionally, the calibration computer comprises a calibration unit,
and when the torque actual value corresponding to the torque actual signal is inconsistent with the torque theoretical value corresponding to the torque theoretical signal, generating calibration data through a calibration unit, and updating the pre-established distribution model based on the calibration data.
According to the torque distribution calibration method provided by the embodiment of the invention, a driving computer sends a torque theoretical signal to a transfer case control unit so that the transfer case control unit controls the transfer case to distribute torque for a transmission shaft according to the torque theoretical signal; after the torque sensor distributes torque for the transmission shaft according to the torque theoretical signal, acquiring a torque actual signal corresponding to the transmission shaft connected with the transfer case, and sending the torque actual signal to a calibration computer; and calibrating the distributed torque of the actuator by a calibration computer based on the torque theoretical signal and the received torque actual signal. The torque actual signal is directly determined through the torque sensor, the problem that the determination of the actual torque value is inaccurate in the prior art is solved, and the calibration result is favorably improved.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A torque split calibration system, comprising: the system comprises a transmission shaft, a transfer case connected with the transmission shaft, a transfer case control unit connected with the transfer case, at least one torque sensor connected with the transmission shaft, a calibration computer connected with each torque sensor, and a traveling crane computer connected with the transfer case control unit;
the traveling crane computer is used for sending the torque theoretical signal to the transfer case control unit so as to enable the transfer case control unit to control the transfer case to distribute torque for the transmission shaft according to the torque theoretical signal;
the torque sensor is used for acquiring a torque actual signal corresponding to a transmission shaft connected with the transfer case after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal, and sending the torque actual signal to the calibration computer;
and the calibration computer is used for calibrating the distributed torque of the transfer case based on the torque theoretical signal and the received torque actual signal.
2. The system of claim 1, wherein the drive shaft comprises a forward drive shaft and a rearward drive shaft, the torque sensor comprises a forward torque sensor and a rearward torque sensor, the forward torque sensor is connected with the forward drive shaft, and the rearward torque sensor is connected with the rearward drive shaft;
the forward torque sensor is used for acquiring a forward torque actual signal corresponding to the forward transmission shaft after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal, and sending the forward torque actual signal to the calibration computer;
the backward torque sensor is used for acquiring a backward torque actual signal corresponding to the backward transmission shaft after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal, and sending the backward torque actual signal to the calibration computer;
and the calibration computer is used for calibrating the distributed torque of the transfer case based on the torque theoretical signal, the received forward torque actual signal and the received backward torque actual signal.
3. The system of claim 1, wherein the torque sensor comprises a flange-style wireless torque sensor mounted at a predetermined disconnect location of the drive shaft.
4. The system of claim 1, wherein the torque sensor comprises at least one signal generating unit connected to the drive shaft, a power supply unit connected to the signal generating unit; the system also comprises a signal integration unit connected with the calibration computer;
the power supply unit is used for providing power supply for the signal generation unit;
the signal generating unit is used for acquiring a torque actual signal corresponding to the transmission shaft after the transfer case distributes torque to the transmission shaft according to the torque theoretical signal, and sending the torque actual signal to the signal integrating unit;
and the signal integration unit is used for carrying out format conversion on the received at least one actual torque signal according to a preset format requirement, and sending the actual torque signal obtained after the format conversion to the calibration computer.
5. The system of claim 4, wherein the power unit comprises a power unit rotor coil and a power unit stator coil;
the power supply unit stator coil is used for providing a magnetic field for the power supply unit rotor coil under the action of a vehicle-mounted power supply;
and the power supply unit rotor coil is used for moving in the magnetic field and generating induction current to supply power to the signal generation unit.
6. The system of claim 5, wherein the signal integration unit comprises a signal transmission subunit;
and the signal sending subunit is used for sending the actual torque signal obtained after the format conversion to the calibration computer in a bus communication mode.
7. The system of claim 1, wherein the vehicle computer is further configured to obtain an operating parameter of a target vehicle prior to sending the torque theoretical signal to the transfer case control unit, determine a torque theoretical value based on the operating parameter, and generate the torque theoretical signal based on the torque theoretical value;
wherein the operation parameters comprise at least one of vehicle weight, operation attitude, operation temperature, speed, acceleration, tire-to-ground adhesion coefficient, throttle position, throttle opening and steering wheel angle.
8. The system of claim 7, wherein the vehicle computer is further configured to generate an alarm message to prompt when the theoretical torque value exceeds a preset maximum torque value.
9. The system of claim 1, wherein the calibration computer comprises a calibration unit configured to generate calibration data when the torque actual value corresponding to the torque actual signal is inconsistent with the torque theoretical value corresponding to the torque theoretical signal, and update the pre-established distribution model based on the calibration data.
10. A torque distribution calibration method is applied to a torque distribution calibration system, and the system comprises: the system comprises a transmission shaft, a transfer case connected with the transmission shaft, a transfer case control unit connected with the transfer case, at least one torque sensor connected with the transmission shaft, a calibration computer connected with each torque sensor, and a traveling computer connected with the transfer case control unit; the torque distribution calibration method comprises the following steps:
the torque theoretical signal is sent to a transfer case control unit through the traveling crane computer, so that the transfer case control unit controls the transfer case to distribute torque for a transmission shaft according to the torque theoretical signal;
acquiring a torque actual signal corresponding to a transmission shaft connected with the transfer case after the transfer case distributes torque for the transmission shaft according to the torque theoretical signal through the torque sensor, and sending the torque actual signal to the calibration computer;
and calibrating the distributed torque of the transfer case by the calibration computer based on the torque theoretical signal and the received torque actual signal.
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| CN202210701474.3A CN114992320A (en) | 2022-06-20 | 2022-06-20 | Torque distribution calibration system and method |
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| CN202210701474.3A CN114992320A (en) | 2022-06-20 | 2022-06-20 | Torque distribution calibration system and method |
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