WO2023065278A1 - 跑偏补偿助力系统及控制方法 - Google Patents
跑偏补偿助力系统及控制方法 Download PDFInfo
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- WO2023065278A1 WO2023065278A1 PCT/CN2021/125550 CN2021125550W WO2023065278A1 WO 2023065278 A1 WO2023065278 A1 WO 2023065278A1 CN 2021125550 W CN2021125550 W CN 2021125550W WO 2023065278 A1 WO2023065278 A1 WO 2023065278A1
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- 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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- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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- B62D6/002—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits computing target steering angles for front or rear wheels
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- B62D9/00—Steering deflectable wheels not otherwise provided for
- B62D9/002—Steering deflectable wheels not otherwise provided for combined with means for differentially distributing power on the deflectable wheels during cornering
Definitions
- the present application relates to the technical field of automobile control, in particular to a tracking deviation compensation assist system and a control method.
- the existing PDC (Pull Drift Compensation) technology applies a compensation torque in the same direction as the driver's hand force through the steering assist motor of the Electric Power Steering (EPS, Electric Power Steering), and slowly compensates the driver's hand force to 0 or close to 0.
- EPS Electric Power Steering
- the existing deviation compensation technology can compensate the driver's hand force, the vehicle is in a straight-line driving state during the compensation process, causing the rotation speed of the power steering motor to be 0, but the output torque is not 0, that is to say, the power steering motor in stalled state.
- the existing deviation compensation technology often limits the compensation torque to a small range, so it can only compensate the driver's hand force within a small range.
- the existing deviation compensation technology completely relies on electric power steering without redundant control. Once the steering assist motor of electric power steering fails, it will directly lead to the failure of deviation compensation.
- the embodiments of the present application provide a tracking deviation compensation booster system and a control method, which are used to solve the technical problems in the prior art that the tracking deviation compensation system has a small compensation range, a motor is locked, and there is no redundant control.
- the embodiment of the present application provides a deviation compensation control method, including:
- the differential power steering is used to perform deviation compensation
- the step of performing deviation compensation through differential power steering includes:
- the yaw compensation control is performed on the vehicle, the additional yaw moment of the vehicle is controlled to be 0, and the two rear wheel drive torques are calculated.
- the step of making the driver's hand force gradually approach 0 includes:
- the total differential power assist torque is iteratively calculated so that the driver's hand force gradually tends to zero.
- the step of performing deviation compensation by electric power steering includes:
- the total torque of the power steering motor is iteratively calculated so that the driver's hand force gradually tends to 0.
- iteratively calculating the total torque of the steering assist motor, so that the driver's hand force gradually tends to 0, includes:
- the total torque of the power steering motor is iteratively calculated so that the driver's hand force gradually tends to zero.
- the method before the step of judging the status information of the differential power steering, the method includes:
- the vehicle is controlled by the vehicle controller.
- the step of judging whether the deviation compensation is enabled includes:
- the running deviation compensation is enabled, and the status information for judging the differential power steering is executed.
- the embodiment of the present application provides a tracking deviation compensation booster system, a control module, a main compensation module and a secondary compensation module that communicate with each other;
- the control module is used for judging the state information of differential power steering
- the main compensation module is used to control the differential power steering through the control module to perform deviation compensation
- the auxiliary compensation module is used to control the electric power steering through the control module to perform deviation compensation.
- control module is connected to the driving motors of the four wheels of the vehicle, and is connected to the power steering motor connected to the steering gear of the vehicle;
- control module controls the four driving motors to perform deviation compensation
- the control module controls the power steering motor to perform deviation compensation.
- the embodiment of the present application provides an electronic device, including a vehicle-mounted electronic control system, a signal acquisition and estimation module, and an execution device.
- the vehicle-mounted electronic control system has the tracking deviation compensation booster system as described in the second aspect.
- the signal acquisition and estimation module has a plurality of vehicle state sensors for measuring vehicle state parameters
- the execution device has a driving motor and a power steering motor as described in the second aspect;
- the signal acquisition and estimation module sends the multiple vehicle state parameters collected by the multiple vehicle state sensors to the vehicle electronic control system, and the vehicle electronic control system controls all vehicles according to the multiple vehicle state parameters.
- the drive motor and the power steering motor so that the electronic device executes the deviation compensation control method as described in the first aspect.
- an embodiment of the present application provides a computer-readable storage medium, including program instructions.
- the program instructions When the program instructions are run on a computer device, the computer device executes the deviation compensation control as described in the first aspect. method.
- the running deviation compensation booster system and control method disclosed in the embodiments of the present application perform compensation through differential power steering, effectively reducing the occurrence of motor stalling for a long time, reducing the risk of motor failure, and weakening the degree of motor performance degradation; Compensation by power steering can expand the hand force range of compensation; through the redundant backup of the main/auxiliary system of differential power steering and electric power steering, it can reduce the failure probability of deviation compensation and improve the driving safety of the vehicle; long-term compensation It is carried out in parallel with the short-term compensation, which can not only compensate for the deviation caused by external factors, but also compensate for the deviation caused by the vehicle's own factors.
- Fig. 1 is a flow chart of a deviation compensation control method according to Embodiment 1 of the present application
- Fig. 2 is a flow chart of S300 in the deviation compensation control method according to Embodiment 1 of the present application;
- Fig. 3 is a flow chart of S310 in the deviation compensation control method according to Embodiment 1 of the present application;
- Fig. 4 is a flow chart of S400 in the deviation compensation control method according to Embodiment 1 of the present application;
- Fig. 5 is a flowchart of S420 in the deviation compensation control method according to Embodiment 1 of the present application.
- FIG. 6 is a flowchart before S200 in the deviation compensation control method according to Embodiment 1 of the present application.
- Fig. 7 is a flow chart of S100 in the deviation compensation control method according to Embodiment 1 of the present application.
- Fig. 8 is a schematic diagram of modules of the deviation compensating assist system according to Embodiment 2 of the present application.
- Fig. 9 is a working schematic diagram of the deviation compensating power assist system according to Embodiment 2 of the present application.
- FIG. 10 is a system architecture diagram of an electronic device according to Embodiment 3 of the present application.
- 10-vehicle electronic control system 11-control module; 12-main compensation module; 13-secondary compensation module; 14-drive motor; 15-steering gear; 16-steering assist motor; - Actuating device.
- Embodiment 1 of the present application discloses a deviation compensation control method, which aims to solve technical problems such as small compensation range, motor stall, and no redundant control existing in the deviation compensation technology.
- the deviation compensation control method includes:
- the differential power steering is used as the main system, and the electric power steering is used as the auxiliary system.
- the switching between the main system and the auxiliary system is mainly based on the status information of the differential power steering.
- the power steering is realized, or through the auxiliary system electric power steering.
- differential power steering is a new type of power steering technology that utilizes the differential torque of the left and right front wheels to provide steering assistance.
- differential control of the left and right wheels can be realized to generate differential power assist torque.
- the driver needs to provide corresponding steering assistance, and the differential power steering's variable assist characteristics with speed also determines its trade-off and compromise in terms of steering assistance and road feel.
- the differential power steering does not fail (such as the drive motor failure)
- the deviation compensation control is realized through the main system differential power steering; when the differential power steering fails, the deviation compensation control is realized through the auxiliary system electric power steering .
- S300 and S400 mainly calculate the drive motor torque and steering assist motor torque required to compensate for the driver's hand force. Because the working principle of the differential power steering of the main system is different from that of the electric power steering of the auxiliary system, the calculation method of the compensation torque is also different. The following describes the differential power steering and electric power steering in detail.
- S310 iteratively calculate the total differential power assist torque, so that the driver's hand force gradually tends to 0;
- S320 Calculate the two front-wheel drive torques according to the total differential power assist torque
- S330 Perform yaw compensation control on the vehicle according to the total differential power assist torque, control the additional yaw moment of the vehicle to be 0, and calculate two rear wheel drive torques.
- S311 Calculate the short-term differential power assist torque according to the driver's hand force and external causes causing the vehicle to deviate;
- S312 Calculate the long-term differential power assist torque according to the driver's hand force and the internal reasons causing the vehicle to deviate;
- S313 Calculate the sum of the short-term differential assist torque and the long-term differential assist torque to obtain the total differential assist torque for compensating the driver's hand force;
- S300 uses differential power steering to perform deviation compensation, which is realized by controlling 4 drive motors based on the driver's hand force.
- step S310 calculates the differential power assist torque required for the tracking deviation compensation control according to the driver's hand force when the vehicle is going straight.
- the factors that cause the vehicle to deviate include internal factors (suspension, tire wear, wheel alignment parameters, etc.) torque.
- the required short-term differential assist torque ⁇ T DS is calculated through short-time compensation, and ⁇ T DS slowly decreases to 0 after the deviation compensation is exited. It also slowly decreases to 0 when the power is turned off; by adjusting the size of the short-time compensation iteration coefficient CS , the time when the short-time compensation tends to be stable can be controlled.
- the specific calculation method of the short-time differential assist torque ⁇ T DS is as follows:
- z represents the current moment
- z-1 represents the previous moment
- the long-term differential assist torque ⁇ T DL is calculated through long-term compensation, and ⁇ T DL is used in the tracking deviation compensation Keep the value at the previous moment unchanged when exiting, and store it when the system is powered off, as the initial value of long-term compensation for the next power-on cycle; by adjusting the size of the long-term compensation iteration coefficient C L , the long-term compensation can be controlled
- the time for the compensation to stabilize, the time for the long-term compensation to stabilize should be longer than the time for the short-term compensation to stabilize.
- the specific calculation method of the long-term differential assist torque ⁇ T DL is as follows:
- the sum of the short-term differential assist torque ⁇ T DS and the long-term differential assist torque ⁇ T DL is the total differential assist torque ⁇ T D required to compensate the driver's hand strength.
- the specific calculation method is as follows:
- ⁇ T D (z) ⁇ T DS (z) + ⁇ T DL (z)
- Step S320 calculates the driving torque of the two front-wheel drive motors according to the total differential power assist torque ⁇ T D , and the specific calculation formula is as follows:
- T f is the driving torque of the front axle
- T 1 and T 2 are the driving torque of the left front wheel and the right front wheel respectively.
- Step S330 performs yaw compensation control on the whole vehicle according to the total differential power assist torque ⁇ T D .
- the differential power steering compensates the driver's hand force through the total differential power torque ⁇ T D , it also forms an additional yaw moment for the vehicle, and the expected yaw rate of the vehicle in the process of going straight is 0, so it is necessary to Control the driving torque of the rear wheels to offset the additional yaw moment formed by the front wheels.
- the rear wheel drive torque needs to meet the following conditions:
- T r is the driving torque of the rear axle
- T 3 and T 4 are the driving torque of the left rear wheel and the right rear wheel, respectively.
- S410 Calculate the drive torques of the four wheels respectively, perform yaw compensation control on the vehicle, and control the additional yaw moment of the vehicle to be 0;
- S423 Calculate the sum of the short-term torque of the power steering motor and the long-term torque of the power steering motor to obtain the total torque of the power steering motor for compensating the driver's hand force;
- S424 Iteratively calculate the total torque of the power steering motor, so that the driver's hand force gradually tends to zero.
- S400 is when the differential power steering fails due to a specific reason (such as a failure of the drive motor), the electric power steering is based on the driver's hand force and controls the steering power motor to perform deviation compensation control.
- the yaw rate of the vehicle When performing deviation compensation control through electric power steering, the yaw rate of the vehicle must first be guaranteed to be 0; at the same time, if the driving torque of the two front wheels is not the same at this time, an additional steering power will be generated, which will exert on the driver's steering wheel The influence of the hand force on it. Therefore, before calculating the torque of the power steering motor, the yaw compensation control must be performed on the vehicle. On this basis, the influence of internal factors, external factors and yaw compensation control is integrated, and the torque of the power steering motor is iteratively calculated until the driver manually force tends to 0.
- Step S410 first performs yaw compensation control on the vehicle, and controls the additional yaw moment of the entire vehicle to be zero. At this time, the driving torque of the four wheels needs to meet the following constraints:
- T 1 -T 2 T 4 -T 3
- the specific driving torques of the four wheels can be further calculated in combination with other vehicle dynamics control functions. Taking the failure of the left front wheel motor as an example, the driving torques of the four wheels can be obtained as follows:
- step S420 calculates the torque of the power steering motor required for the deviation compensation control according to the driver's hand force when the vehicle is going straight. For the internal factors and external factors that cause the vehicle to deviate, it is necessary to calculate the required torque of the power steering motor separately. For the deviation caused by external factors, it is mainly based on the driver’s hand force T h , and the short-term torque T ES of the power steering motor required by short-time compensation is calculated, and T ES slowly decreases to 0 after the deviation compensation exits.
- the running deviation caused by internal factors it is mainly based on the driver's hand force T h and the short-term torque T ES of the power steering motor, and the long-term torque T EL of the power steering motor required by long-term compensation is calculated, and T EL is in the running deviation compensation Keep the value at the previous moment unchanged when exiting, store it when the system is powered off, and use it as the initial compensation value for the long-term compensation in the next power-on cycle; by adjusting the value of the long-term compensation iteration coefficient C L , the long-term compensation can be controlled.
- the time when the long-term compensation becomes stable should be longer than the time when the short-time compensation becomes stable.
- the specific calculation method of the long-term torque T EL of the power steering motor is as follows:
- the sum of the short-term torque T ES of the power steering motor and the long-term torque T EL of the power steering motor is the total torque T E of the power steering motor required to compensate the driver's hand force.
- T E (z) T EL (z) + T ES (z)
- the calculation is iterative until the driver's hand force tends to 0.
- step S110 Determine whether the vehicle is in a straight-going state; if not, return to step S110; if yes, enter step S120;
- S130 judging whether the driver's hand strength reaches a preset hand strength threshold
- S140 judge whether the timing of reaching the hand force threshold has reached the preset time
- step S110 judge whether the vehicle is in the state of going straight, if not, return to step S110; if yes, enter step S120.
- the conditions for judging whether the vehicle is in the straight-going state are as follows:
- Vehicle mass center yaw rate ⁇ ⁇ r0 Vehicle mass center yaw rate ⁇ ⁇ r0 .
- u 0 , ⁇ 0 , a x0 , a y0 , and ⁇ r0 are vehicle speed threshold, steering wheel angle threshold, steering wheel speed threshold, longitudinal acceleration threshold, lateral acceleration threshold, and yaw rate threshold, respectively.
- Step S120 judges whether the deviation compensation is enabled, if yes, proceed to S200; if not, proceed to step S130.
- Step S130 judges whether the driver's hand strength reaches the hand strength threshold T h0 , if not, returns to step S110 ; if yes, proceeds to step S140 .
- Step S140 starts timing when the driver's hand strength is greater than the hand strength threshold T h0 , and when the counted time is greater than the time threshold t, enter step S150 ; otherwise, return to step S110 .
- Step S150 sends out a deviation compensation enabling signal, enters S200, and returns to step S110 at the same time, and starts a new round of deviation compensation enabling judgment.
- Embodiment 2 of the present application discloses a tracking deviation compensation booster system, including a control module 11 , a main compensation module 12 and a secondary compensation module 13 that communicate with each other.
- control module 11 is used to judge the state information of the differential power steering; when the differential power steering is valid, the main compensation module 12 is used to control the differential power steering through the control module 11 to perform deviation compensation; , the auxiliary compensation module 13 is used to control the electric power steering through the control module 11 to perform deviation compensation.
- the control module 11 is connected with the drive motors 14 of the four wheels of the vehicle, and is connected with the steering assist motor 16 connected to the steering gear 15 of the vehicle;
- the control module 11 controls the four driving motors 14 to perform deviation compensation;
- the auxiliary compensation module 13 is activated, the control module 11 controls the steering assist motor 16 to perform deviation compensation.
- the deviation compensating power assist system in Embodiment 2 is mainly applied to the scene of straight-line driving of the vehicle to compensate the driver's hand strength.
- the dual-redundant deviation compensation system is mainly composed of a motor controller (MCU, Motor Control Unit) (i.e. the control module 11), a differential power steering (i.e. the main compensation module 12) and an electric power steering (i.e. the auxiliary compensation module 13).
- MCU Motor Control Unit
- the differential power steering i.e. the main compensation module 12
- an electric power steering i.e. the auxiliary compensation module 13
- Composition, the differential power steering (that is, the main compensation module 12) and the electric power steering (that is, the auxiliary compensation module 13) form a main/auxiliary redundant deviation compensation system.
- the differential power steering controls the driving motors 14 of the four wheels to perform deviation compensation control
- the electric power steering controls the steering power motor 16 to perform deviation compensation control.
- information can be exchanged between the two.
- Differential power steering and electric power steering send the driving torque commands of the four drive motors 14 and the torque commands of the steering power motor 16 To the motor controller, and then control the drive motor 14 and the power steering motor 16 through the motor controller, so as to realize compensation for the driver's hand force.
- Embodiment 3 of the present application discloses an electronic device, including a vehicle-mounted electronic control system 10, a signal acquisition and estimation module 20, and an execution device 30.
- the vehicle-mounted electronic control system 10 has the running In the partial compensation power assist system
- the signal acquisition and estimation module 20 has a plurality of vehicle state sensors for measuring vehicle state parameters
- the execution device 30 has the drive motor and the power steering motor of Embodiment 2 of the present application;
- the signal acquisition and estimation module 20 sends multiple vehicle state parameters collected by multiple vehicle state sensors to the on-board electronic control system 10, and the on-board electronic control system 10 controls the drive motor and the power steering motor according to the multiple vehicle state parameters, so that The electronic device executes the tracking deviation compensation control method as in Embodiment 1.
- the electronic device of Embodiment 3 mainly includes three parts, which are the vehicle-mounted electronic control system 10 , the signal acquisition and estimation module 20 , and the execution device 30 .
- the on-vehicle electronic control system 10 mainly includes electric power steering (i.e. auxiliary compensation module 13), vehicle controller (VCU, Vehicle Control Unit), motor controller (i.e. control module 11), etc., and the control logic of differential power steering Generally placed in the vehicle controller, that is, the vehicle controller has the main compensation module 12;
- the signal acquisition and estimation module 20 mainly includes vehicle speed estimation, yaw rate sensor, steering wheel angle sensor, steering wheel torque sensor, longitudinal acceleration sensor And other vehicle state sensors and vehicle parameters;
- the actuator 30 mainly includes the drive motor 14 and the power steering motor 16 .
- the signal acquisition and estimation module 20 transmits vehicle speed, steering wheel angle, driver's hand force (steering wheel torque), yaw rate and other vehicle state information to the vehicle electronic control system 10.
- vehicle electronic control system 10 Differential power steering, electric power steering and motor controllers interact with each other to determine the system that performs deviation compensation control: if differential power steering performs deviation compensation control, the torque of the power steering motor is controlled to be 0, and further calculation The torque of the driving motor; if the electric power steering performs deviation compensation control, the torque of the driving motor and the torque of the power steering motor are calculated separately.
- the on-vehicle electronic control system 10 sends the drive motor torque command and the power steering motor torque command to the actuators 30 such as the drive motor 14 and the power steering motor 16 respectively, so as to realize effective control of the vehicle.
- Embodiment 4 of the present application also provides a computer-readable storage medium, including program instructions.
- the program instructions When the program instructions are run on the computer equipment, the computer equipment executes the deviation compensation control method as described in the first aspect. .
- the running deviation compensation booster system and control method disclosed in the embodiments of the present application perform compensation through differential power steering, effectively reducing the occurrence of motor stalling for a long time, reducing the risk of motor failure, and weakening the degree of motor performance degradation; Compensation by power steering can expand the hand force range of compensation; through the redundant backup of the main/auxiliary system of differential power steering and electric power steering, it can reduce the failure probability of deviation compensation and improve the driving safety of the vehicle; long-term compensation It is carried out in parallel with the short-term compensation, which can not only compensate for the deviation caused by external factors, but also compensate for the deviation caused by the vehicle's own factors.
- a computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the present application will be generated in whole or in part.
- a computer can be a general purpose computer, special purpose computer, computer network, or other programmable device.
- Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, from a website, computer, server, or data center via a wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server or data center.
- the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server, a data center, etc. integrated with one or more available media.
- the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, a Solid State Disk).
- the processor involved may, for example, include a central processing unit (CPU, central processing unit), a microprocessor, a microcontroller or a digital signal processor, and may also include a graphics processing unit (GPU, graphics processing unit) , network processor (NPU, Neural-network Processing Unit) and Internet service provider (ISP, Internet Service Provider), the processor can also include necessary hardware accelerators or logic processing hardware circuits, such as application-specific integrated circuits (ASIC, application-specific integrated circuit), or one or more integrated circuits used to control the program execution of the technical solution of this application, etc. Additionally, the processor may be capable of operating one or more software programs, which may be stored in the memory.
- CPU central processing unit
- microprocessor a microcontroller or a digital signal processor
- GPU graphics processing unit
- NPU Neural-network Processing Unit
- ISP Internet Service Provider
- the processor can also include necessary hardware accelerators or logic processing hardware circuits, such as application-specific integrated circuits (ASIC, application-specific integrated circuit), or one or more integrated
- the memory can be read-only memory (ROM, read-only memory), other types of static storage devices that can store static information and instructions, random access memory (RAM, random access memory), or other types that can store information and instructions
- a dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM, electrically erasable programmable read-only memory), a read-only disc (CD-ROM, compact disc read-only memory) or other optical disc storage, optical disc storage ( Including Compact Disc, Laser Disc, Optical Disc, Digital Versatile Disc, Blu-ray Disc, etc.), magnetic disk storage medium or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can Any other media accessed by a computer, etc.
- EEPROM electrically erasable programmable read-only memory
- CD-ROM compact disc read-only memory
- CD-ROM compact disc read-only memory
- optical disc storage Including Compact Disc, Laser Disc, Optical Disc,
- "at least one” means one or more, and “multiple” means two or more.
- “And/or” describes the association relationship of associated objects, indicating that there may be three kinds of relationships, for example, A and/or B may indicate that A exists alone, A and B exist simultaneously, or B exists alone. Among them, A and B can be singular or plural.
- the character “/” generally indicates that the contextual objects are an “or” relationship.
- “At least one of the following” and similar expressions refer to any combination of these items, including any combination of single items or plural items.
- At least one of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, and c may be single or multiple.
- any function is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
- the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.
- program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.
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Abstract
Description
Claims (11)
- 一种跑偏补偿控制方法,其特征在于,包括:判断差动助力转向的状态信息;在所述差动助力转向有效时,通过所述差动助力转向进行跑偏补偿;在所述差动助力转向失效时,通过电动助力转向进行跑偏补偿。
- 根据权利要求1所述的跑偏补偿控制方法,其特征在于,在所述通过差动助力转向进行跑偏补偿的步骤中,包括:迭代计算总差动助力扭矩,使所述驾驶员手力逐渐趋于0;根据所述总差动助力扭矩,计算两个前轮驱动扭矩;根据所述总差动助力扭矩,对车辆进行横摆补偿控制,控制车辆的附加横摆力矩为0,计算两个后轮驱动扭矩。
- 根据权利要求2所述的跑偏补偿控制方法,其特征在于,在迭代计算总差动助力扭矩,使所述驾驶员手力逐渐趋于0的步骤中,包括:根据驾驶员手力和造成车辆跑偏的外部原因计算短时差动助力扭矩;根据驾驶员手力和造成车辆跑偏的内部原因计算长时差动助力扭矩;计算所述短时差动助力扭矩和所述长时差动助力扭矩之和,得到补偿所述驾驶员手力的总差动助力扭矩;迭代计算所述总差动助力扭矩,使所述驾驶员手力逐渐趋于0。
- 根据权利要求1所述的跑偏补偿控制方法,其特征在于,在通过电动助力转向进行跑偏补偿的步骤中,包括:分别计算四个车轮驱动扭矩,对车辆进行横摆补偿控制,控制车辆的附加横摆力矩为0;在所述附加横摆力矩为0的基础上,迭代计算转向助力电机总扭矩,使驾驶员手力逐渐趋于0。
- 根据权利要求4所述的跑偏补偿控制方法,其特征在于,在所述附加横摆力矩为0的基础上,迭代计算转向助力电机总扭矩,使驾驶员手力逐渐趋于0的步骤中,包括:根据驾驶员手力和造成车辆跑偏的外部原因计算转向助力电机短时扭矩;根据驾驶员手力和造成车辆跑偏的内部原因计算转向助力电机长时扭矩;计算所述转向助力电机短时扭矩和所述转向助力电机长时扭矩之和,得到补偿所述驾驶员手力的转向助力电机总扭矩;迭代计算所述转向助力电机总扭矩,使所述驾驶员手力逐渐趋于0。
- 根据权利要求1所述的跑偏补偿控制方法,其特征在于,在判断差动助力转向的状态信息的步骤之前,包括:判断跑偏补偿是否使能;若使能,则执行判断差动助力转向的状态信息;若不使能,则通过车辆电机控制器控制车辆的跑偏补偿。
- 根据权利要求6所述的跑偏补偿控制方法,其特征在于,在判断跑偏补偿是否使能的步骤中,包括:判断车辆是否处于直行状态;判断跑偏补偿是否已处于使能状态;若是,则执行判断差动助力转向的状态信息;若否,则判断驾驶员手力是否达到预设手力阈值;若达到所述预设手力阈值,则判断达到所述手力阈值的计时是否达到预设时间;若达到所述预设时间,则对跑偏补偿进行使能,并执行判断差动助力转向的状态信息。
- 一种跑偏补偿助力系统,其特征在于,互相通信的控制模块、主补偿模块和副补偿模块;所述控制模块用于判断差动助力转向的状态信息;在所述差动助力转向有效时,所述主补偿模块用于通过所述控制模块控制差动助力转向进行跑偏补偿;在所述差动助力转向失效时,所述副补偿模块用于通过所述控制模块控制电动助力转向进行跑偏补偿。
- 根据权利要求8所述的跑偏补偿助力系统,其特征在于,所述控制模块与车辆的四个车轮的驱动电机相连接,并与连接在车辆的转向器上的转向助力电机相连接;在启动所述主补偿模块时,所述控制模块控制所述四个驱动电机进行跑偏补偿;在启动所述副补偿模块时,所述控制模块控制所述转向助力电机进行跑偏补偿。
- 一种电子设备,其特征在于,包括车载电子控制系统、信号采集与预估模块以及执行装置,所述车载电子控制系统具有如权利要求8或9所述的跑偏补偿助力系统,所述信号采集与预估模块具有多个用于测量车辆状态参数的车辆状态传感器,所述执行装置具有如权利要求9所述的驱动电机和转向助力电机;所述信号采集与预估模块将通过所述多个车辆状态传感器采集到的多个车辆状态参数发送给所述车载电子控制系统,所述车载电子控制系统根据所述多个车辆状态参数控制所述驱动电机和所述转向助力电机,使得所述电子设备执行如权利要求1-7任一项所述的跑偏补偿控制方法。
- 一种计算机可读存储介质,包括程序指令,其特征在于,当所述程序指令在计算机设备上运行时,使得所述计算机设备执行如权利要求1-7任一项所述的跑偏补偿控制方法。
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- 2021-10-22 EP EP21961027.6A patent/EP4393791A1/en active Pending
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