Automobile power-assisted steering adaptive control method based on human body information and related equipment

Abstract

The invention discloses an automobile steering assistance self-adaptive control method based on human body information and related equipment, and belongs to the technical field of automobile steering. Constructing a basic power-assisted current control function by using the steering wheel input torque and the vehicle speed; generating a power-assisted gain coefficient by using comparison results of the driver weight information, the seat position information, the steering wheel height adjustment information and the steering wheel telescopic length information with corresponding preset thresholds; acquiring a motor power-assisted current control function according to the power-assisted gain coefficient and the basic power-assisted current control function; and the real-time steering wheel input torque and the real-time vehicle speed are processed through the motor power-assisted current control function, and motor power-assisted current is obtained, so that the power-assisted motor outputs the corresponding power-assisted torque. A more humanized and comfortable steering power-assisted steering wheel operation hand feeling is realized, and the problems that the existing steering power-assisted steering wheel is fixed and individual differences are neglected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle steering, and in particular to a method and related device for adaptively controlling vehicle steering assistance based on human body information. Background Art

[0002] The statements in this part only mention the background art related to the present invention, and do not necessarily constitute prior art.

[0003] The technologies of vehicle electrification, intelligence, and networking are gradually penetrating into each sub-component of the vehicle system. As an important system with high perception and attention in the vehicle, the intelligence of the steering system is also accelerating; for example, automatic steering matching with high-level autonomous driving, etc.

[0004] The current steering assistance mode of the vehicle is that after being adjusted by developers in the early stage, it is locked into the steering assistance module. In a certain state, the assistance magnitude is a fixed value. In reality, due to individual differences among humans and different operating forces on the steering wheel, different requirements for steering assistance exist. Using a fixed value for steering assistance affects the operating feel of the steering wheel. Summary of the Invention

[0005] To solve the deficiencies of the prior art, the present invention provides a method, device, system, and vehicle for adaptively controlling vehicle steering assistance based on human body information, which performs adaptive steering assistance control considering individual differences and driving habits among drivers, and improves the operating feel of the steering wheel.

[0006] In the first aspect, the present invention provides a method for adaptively controlling vehicle steering assistance based on human body information;

[0007] A method for adaptively controlling vehicle steering assistance based on human body information includes:

[0008] Constructing a basic assistance current control function using the steering wheel input torque and vehicle speed;

[0009] Obtaining the driver's weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information, and generating an assistance gain coefficient based on the comparison results of the driver's weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information with corresponding preset thresholds;

[0010] Obtaining a motor assistance current control function according to the assistance gain coefficient and the basic assistance current control function; obtaining the real-time steering wheel input torque and real-time vehicle speed, and processing the real-time steering wheel input torque and real-time vehicle speed through the motor assistance current control function to obtain the motor assistance current, so that the assistance motor outputs a corresponding assistance torque.

[0011] In some embodiments, generating a boost gain coefficient based on the comparison results of the driver weight information, the seat position information, the steering wheel height adjustment information, and the steering wheel telescopic length information with corresponding preset thresholds includes:

[0012] Generating a first boost gain coefficient based on the ratio of the driver weight information to a preset human weight threshold;

[0013] Generating a second boost gain coefficient based on the ratio of the seat position information to the maximum seat movement distance;

[0014] Generating a third boost gain coefficient based on the ratio of the steering wheel height adjustment information to the maximum steering wheel adjustment distance;

[0015] Generating a fourth boost gain coefficient based on the ratio of the steering wheel telescopic length information to the maximum steering wheel telescopic distance.

[0016] In some embodiments, the first boost gain coefficient is expressed as:

[0017] k 1 =(m 0 -m)*k 1 max / min / m 0 ;

[0018] In the formula, m 0 represents the human weight threshold, m represents the driver weight information, and k 1 max / min represents the maximum / minimum value of the first boost gain coefficient;

[0019] The second boost gain coefficient is expressed as:

[0020] k 2 =W*k 2 max / min / W max ;

[0021] In the formula, W represents the seat position information, k 2 max / min represents the maximum / minimum value of the second boost gain coefficient, and W max represents the maximum seat movement distance;

[0022] The third boost gain coefficient is expressed as:

[0023] k 3 =H*k 3 max / min / H max ;

[0024] Wherein, H represents the steering wheel height adjustment information, and k 3 max / min represents the maximum / minimum value of the third boost gain coefficient, and H max represents the maximum steering wheel adjustment distance;

[0025] The fourth boost gain coefficient is expressed as:

[0026] k 4 = L * k 4 max / min / L max ;

[0027] Wherein, L represents the steering wheel telescopic length information, and k 4 max / min represents the maximum / minimum value of the third boost gain coefficient, and L max represents the maximum steering wheel telescopic distance.

[0028] In some embodiments, obtaining the motor boost current control function according to the boost gain coefficient and the basic boost current is specifically: using the product of the first boost gain coefficient, the second boost gain coefficient, and the third boost gain coefficient and the basic boost current to determine the corresponding boost gain current, and combining with the basic boost current control function to determine the motor boost current control function.

[0029] In some embodiments, it further includes: in response to the driver's input operation, terminating the calculation of the first boost gain coefficient, the second boost gain coefficient, the third boost gain coefficient, and / or the fourth boost gain coefficient.

[0030] In some embodiments, the motor boost current control function is expressed as:

[0031] I a = (1 + k 1 + k 2 + k 3 + k 4 ) * f(T d , V);

[0032] Wherein, k 1 represents the first boost gain coefficient, k 2 represents the second boost gain coefficient, k 3 represents the third boost gain coefficient, k 4 represents the fourth boost gain coefficient, and f(T d , V) represents the basic boost current control function, T d represents the steering wheel input torque, and V represents the vehicle speed.

[0033] In a second aspect, the present invention provides an automotive steering assist adaptive control device based on human body information;

[0034] An automobile steering assist adaptive control device based on human body information, comprising:

[0035] A basic control module, configured to: utilize the steering wheel input torque and vehicle speed to construct a basic assist current control function;

[0036] An adaptive control module, configured to: obtain the driver's body weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information, and generate an assist gain coefficient based on the comparison results of the driver's body weight information, the seat position information, the steering wheel height adjustment information, the steering wheel telescopic length information and corresponding preset thresholds;

[0037] Obtain a motor assist current control function according to the assist gain coefficient and the basic assist current control function; obtain the real-time steering wheel input torque and real-time vehicle speed, process the real-time steering wheel input torque and real-time vehicle speed through the motor assist current control function, and obtain the motor assist current, so that the assist motor outputs a corresponding assist torque.

[0038] In a third aspect, the present invention provides an automobile steering assist adaptive control system based on human body information;

[0039] An automobile steering assist adaptive control system based on human body information, comprising:

[0040] A data acquisition unit, configured to acquire the driver's body weight information, seat position information, steering wheel height adjustment information, steering wheel telescopic length information, real-time steering wheel input torque, and real-time vehicle speed;

[0041] A steering control unit, configured to: utilize the steering wheel input torque and vehicle speed to construct a basic assist current control function; obtain the driver's body weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information, and generate an assist gain coefficient based on the comparison results of the driver's body weight information, the seat position information, the steering wheel height adjustment information, the steering wheel telescopic length information and corresponding preset thresholds; obtain a motor assist current control function according to the assist gain coefficient and the basic assist current control function; obtain the real-time steering wheel input torque and real-time vehicle speed, process the real-time steering wheel input torque and real-time vehicle speed through the motor assist current control function, and obtain the motor assist current;

[0042] An assist motor, configured to output an assist torque corresponding to the motor assist current to drive the steering wheel to rotate.

[0043] In some embodiments, a central control screen is further included, and the central control screen is configured to obtain the input operations of the driver and transmit them to the control unit, and the control unit terminates the calculation of the first boost gain coefficient, the second boost gain coefficient, the third boost gain coefficient, and / or the fourth boost gain coefficient in response to the input operations of the driver.

[0044] Fourthly, the present invention provides an automobile;

[0045] An automobile includes the above-mentioned vehicle steering assist adaptive control system.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0047] 1. The technical solution provided by the present invention can calculate the magnitude of the current required by the boost motor according to the human body information given by the driver, so that the boost motor outputs a corresponding boost torque, realizing a more user-friendly and comfortable steering feel of the power steering wheel.

[0048] 2. In the technical solution provided by the present invention, through the central control screen, the driver can cancel or turn on each gain item by using physical buttons or voice control according to his own needs, realizing the steering feel of the steering wheel required by different drivers in an intelligent and personalized manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0050] Figure 1 It is a schematic flow chart of the vehicle steering assist adaptive control method based on human body information provided by an embodiment of the present invention;

[0051] Figure 2 It is a schematic architecture diagram of the vehicle steering assist adaptive control system based on human body information provided by an embodiment of the present invention;

[0052] Figure 3 It is an example diagram of different boost motor current curves provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0053] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0054] Without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0055] Embodiment 1

[0056] The existing automotive power steering control does not consider the driver's body information and driving habits, which affects the driving experience. Therefore, the present invention provides an adaptive control method for automotive power steering based on body information.

[0057] Next, in combination with Figures 1 - 3 A detailed description will be given of an adaptive control method for automotive power steering based on body information disclosed in this embodiment. The adaptive control method for automotive power steering based on body information is deployed in a control unit and includes the following steps:

[0058] S1. Using the steering wheel input torque and vehicle speed, construct a basic assist current control function; where the basic assist current control function is expressed as:

[0059] I a0 = f(T d , V) = K(V) * T d ;

[0060] In the formula, K(V) is a vehicle speed-related gain coefficient, V represents the vehicle speed, and T d represents the steering wheel input torque.

[0061] Generally, in the case of only steering wheel torque information input, the power steering belongs to the basic control method, that is, the assist current is calculated through the basic assist current control function, and the assist current control curve is as Figure 3 in I a0 state.

[0062] S2. Obtain the driver's weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information. Based on the comparison results of the driver's weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information with corresponding preset thresholds, generate an assist gain coefficient; according to the assist gain coefficient and the basic assist current control function, determine the corresponding assist gain current, and obtain the motor assist current control function.

[0063] Considering the different requirements for the steering wheel operating force caused by individual differences among drivers, in this embodiment, the driver's body information is introduced into the power steering control to provide power steering that meets the personalized needs of the driver; as an implementation manner, S2 specifically includes:

[0064] S201. Obtain the driver's weight information, and generate a first assist gain coefficient based on the ratio of the driver's weight information to the preset human weight threshold; where the first assist gain coefficient and the corresponding assist gain current are expressed as:

[0065] k 1 = (m 0 - m) * k1 max / min / m 0 ;

[0066] I a0_s1 =k 1 *f(T d ,V);

[0067] In the formula, m 0 represents the human body weight threshold, m represents the driver's body weight information, and k 1 max / min represents the maximum / minimum value of the first boost gain coefficient. I a0_s1 represents the boost gain current associated with the human body weight information.

[0068] Exemplarily, the human body weight threshold m 0 = 67 kg. If the driver's body weight information = m 0 , then k 1 is set to 0; if the driver's body weight information is greater than 67 kg, then k 1 is negative; if the driver's body weight information is less than 67 Kg, then k 1 is positive; the maximum and minimum values can be set to k 1 max = 0.3, k 1 min = -0.3, that is, the calculated value of k 1 shall not exceed ±0.3. If it exceeds, it shall be processed as -0.3 or 0.3.

[0069] For example, if the driver's body weight m = 80 Kg, then k 1 = (m 0 - m) * k 1 max / m 0 = -0.058.

[0070] Here, the driver's body weight information is collected by a driver's seat human body weight information sensor installed on the seat. A driver with a larger body weight may be accustomed to applying a greater steering force during vehicle driving, and the corresponding boost gain should be reduced; a driver with a smaller body weight may be accustomed to applying a smaller steering force during vehicle driving, and the corresponding boost gain should be increased.

[0071] S202. Generate a second boost gain coefficient based on the ratio of the seat position information to the maximum seat movement distance; wherein, the second boost gain coefficient and the corresponding boost gain current are expressed as:

[0072] k 2 = W * k 2 max / min / W max ;

[0073] I a0_s2 = k 2 * f(T d , V);

[0074] Wherein, W represents the seat position information, and k 2 max / min represents the maximum / minimum value of the second boost gain coefficient, W max represents the maximum seat movement distance, and I a0_s2 represents the boost gain current associated with the seat position information.

[0075] The seat position information here refers to the distance information of the seat position adjusted before and after relative to the designed position state, and the position information of the driver's seat relative to the designed position at this time is collected by the front and rear position information sensor of the driver's seat.

[0076] Exemplarily, when the seat position is in the designed position state, then W 0 = 0, k 2 = 0; when the seat is adjusted forward, k 2 is a positive value, and when adjusted backward, k 2 is a negative value. The maximum and minimum values can be set as k 2 max = 0.3, k 2 min = -0.3, that is, the calculated value of k 2 shall not exceed ±0.3. If it exceeds, it shall be processed as -0.3 or 0.3; the maximum forward / backward movement distance of the seat W max = ±60 mm; a driver with a smaller build may move the seat forward before driving and may be accustomed to applying a slightly smaller steering force during driving, and the corresponding boost gain should increase; a driver with a larger build may move the seat backward before driving and may be accustomed to applying a larger steering force during driving, and the corresponding boost gain should decrease.

[0077] For example, when the seat position moves backward by a distance W = -40 mm, then k 2 = W * k 2 max / W max = -0.2.

[0078] S203. Generate a third boost gain coefficient based on the ratio of the steering wheel height adjustment information to the maximum steering wheel adjustment distance; wherein, the third boost gain coefficient and the corresponding boost gain current are expressed as:

[0079] k 3 = H * k 3 max / min / H max ;

[0080] I a0_s3 = k 3 * f(T d , V);

[0081] In the formula, H represents the steering wheel height adjustment information, and k 3 max / min represents the maximum / minimum value of the third boost gain coefficient, H max represents the maximum steering wheel adjustment distance, and I a0_s3 represents the boost gain current associated with the steering wheel adjustment height information.

[0082] Exemplarily, when the steering wheel is in the designed position state, then H 0 = 0, k 3 = 0; when the steering wheel is adjusted upward, k 3 is negative, and when adjusted downward, k 3 is positive; the maximum and minimum values can be set as k 3 max = 0.3, k 3 min = -0.3, that is, the calculated value of k 3 shall not exceed ±0.3, and if it exceeds, it shall be processed as -0.3 or 0.3; the maximum up / down adjustment distance H max of the steering wheel = ±30 mm; drivers with a smaller build or lower height may lower the steering wheel before driving and may be accustomed to applying a slightly smaller steering force during vehicle driving, and the corresponding boost gain should increase; drivers with a larger build or higher height may raise the steering wheel before driving and may be accustomed to applying a larger steering force during vehicle driving, and the corresponding boost gain should decrease.

[0083] For example, if the steering wheel is adjusted upward by H = -20 mm, then k 3 = H * k 3 max / H max = -0.2.

[0084] Here, the steering wheel height adjustment information is collected by a position sensor installed in the steering wheel adjustment height direction.

[0085] S204. Generate a fourth boost gain coefficient based on the ratio of the steering wheel telescopic length information and the maximum telescopic distance of the steering wheel; among them, the fourth boost gain coefficient and the corresponding boost gain current are expressed as:

[0086] k 4 = L * k 4 max / min / L max ;

[0087] I a0_s4 = k 4 * f(T d , V);

[0088] In the formula, L represents the telescopic length information of the steering wheel, and k 4 max / min represents the maximum / minimum value of the third boost gain coefficient, L max represents the maximum telescopic distance of the steering wheel, and I a0_s4 represents the boost gain current associated with the telescopic length information of the steering wheel.

[0089] Exemplarily, when the steering wheel is in the designed position state, then L = 0 and k 4 = 0; when the steering wheel is adjusted backward, then k 4 is negative, and when adjusted forward, then k 4 is positive; the maximum and minimum values can set k 4 max = 0.3, k 4 min = -0.3, that is, the calculated value of k 4 shall not exceed ±0.3, and if it exceeds, it shall be processed as -0.3 or 0.3; the maximum telescopic length L max of the steering wheel forward and backward = ±30 mm. Smaller-sized drivers tend to lean forward during driving and may move the steering wheel forward before driving. They may be accustomed to applying a slightly smaller steering force during vehicle driving, and the corresponding boost gain should increase; larger-sized drivers may move the steering wheel backward before driving and may be accustomed to applying a larger steering force during vehicle driving, and the corresponding boost gain should decrease.

[0090] For example, if the steering wheel telescopically moves forward by L = 15 mm, then k 4 = L * k 4 min / L max = 0.15.

[0091] S205. Obtain the motor boost current control function according to the first boost gain coefficient, the second boost gain coefficient, the third boost gain coefficient, the fourth boost gain coefficient, and the basic boost current control function, which is expressed as:

[0092] I a = I a0 + I a0_s1 + I a0_s2 + I a0_s3 + I a0_s4

[0093] = f(T d , V)+ k 1 * f(T d, V) + k 2 *f(T d , V) + k 3 *f(T d , V) + k 4 *f(T d , V)

[0094] = (1 + k 1 + k 2 + k 3 + k 4 ) * f(T d , V);

[0095] In the formula, k 1 represents the first boost gain coefficient, k 2 represents the second boost gain coefficient, k 3 represents the third boost gain coefficient, k 4 represents the fourth boost gain coefficient, f(T d , V) represents the basic boost current control function, T d represents the steering wheel input torque, and V represents the vehicle speed.

[0096] In addition, if a certain information channel fails or this vehicle model does not have this configuration, the boost gain coefficient of this item can be set to the default value of 0.

[0097] Furthermore, the driver can also control the turning on or off of the above-mentioned boost gain of a certain item through the physical buttons on the central control screen or voice input; thereby, the steering wheel operation feel required by different drivers is realized in an intelligent and personalized manner.

[0098] S3. Obtain the real-time steering wheel input torque and real-time vehicle speed, process the real-time steering wheel input torque and real-time vehicle speed through the motor boost current control function, and obtain the motor boost current so that the boost motor outputs the corresponding boost torque.

[0099] Based on this, according to the information given by the current driver, the current magnitude of the boost motor is calculated adaptively, so that the boost motor outputs the corresponding boost torque. The motor boost current integrating the driver information is optimized from the basic boost curve I a0 to Figure 3 the I a1 or I a2 in it, where I a1 represents the larger boost current, indicating a lighter steering wheel operation force. And I a2 represents the smaller boost current, indicating a more stable steering wheel operation force.

[0100] Embodiment 2

[0101] This embodiment discloses an adaptive control device for vehicle steering assist based on human body information, including:

[0102] A basic control module, configured to: construct a basic assist current control function by using the steering wheel input torque and vehicle speed;

[0103] An adaptive control module, configured to: obtain the driver's weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information, and generate an assist gain coefficient based on the comparison results of the driver's weight information, the seat position information, the steering wheel height adjustment information, the steering wheel telescopic length information with corresponding preset thresholds;

[0104] Obtain a motor assist current control function according to the assist gain coefficient and the basic assist current control function; obtain the real-time steering wheel input torque and real-time vehicle speed, and process the real-time steering wheel input torque and real-time vehicle speed through the motor assist current control function to obtain the motor assist current, so that the assist motor outputs a corresponding assist torque.

[0105] It should be noted here that the above basic control module and adaptive control module correspond to the steps in Embodiment 1. The examples and application scenarios implemented by the above modules and the corresponding steps are the same, but are not limited to the content disclosed in Embodiment 1 above. It should be noted that the above modules, as part of the system, can be executed in a computer system such as a set of computer-executable instructions.

[0106] Embodiment 3

[0107] Combined with Figure 2 , based on the adaptive control method for vehicle steering assist based on human body information described in the embodiment, Embodiment 3 of the present invention provides an adaptive control system for vehicle steering assist based on human body information. The adaptive control system for vehicle steering assist based on human body information includes a data acquisition unit, a steering control unit, and an assist motor. The data acquisition unit and the steering control unit are communicatively connected through the vehicle CAN. The steering control unit is connected to the assist motor through a wire harness.

[0108] The data acquisition unit is used to collect the driver's weight information, seat position information, steering wheel height adjustment information, steering wheel telescopic length information, real-time steering wheel input torque, and real-time vehicle speed; the steering control unit is used to construct a basic boost current control function by using the steering wheel input torque and vehicle speed; obtain the driver's weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information, and generate a boost gain coefficient based on the comparison results of the driver's weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information with corresponding preset thresholds; obtain the motor boost current control function according to the boost gain coefficient and the basic boost current control function; obtain the real-time steering wheel input torque and real-time vehicle speed, process the real-time steering wheel input torque and real-time vehicle speed through the motor boost current control function to obtain the motor boost current; the boost motor is used to output the boost torque corresponding to the motor boost current to drive the steering wheel to rotate.

[0109] Further, the data acquisition unit includes a driver's seat human weight information sensor, a driver's seat front-rear position information sensor, a steering wheel adjustment height direction position information sensor, a steering wheel telescopic length direction position information sensor, and a torque & rotation angle sensor;

[0110] Further, the vehicle steering assist adaptive control system based on human body information further includes a steering wheel, a transmission mechanism, a central control screen, a vehicle CAN, a steering actuator, and wheels. The steering wheel can be mechanically connected to the transmission mechanism; the boost motor is connected to the transmission mechanism through a reduction mechanism; the steering wheel position sensor is arranged in the transmission mechanism and is used to collect the relative height and length position of the steering wheel; the torque & rotation angle sensor is arranged in the transmission mechanism and is used to collect the steering wheel torque and rotation angle information; the control unit can be connected to the boost motor through a wire harness or integrated on the boost motor housing; the seat sensor is arranged in the driver's seat on the driver side and is used to collect the driver's weight information and the relative movement position of the seat; the vehicle CAN is a communication module that provides information such as the power-on state of the vehicle and the vehicle speed for the control unit; the central control screen is an artificial control input window for the driver to control the feel; the transmission mechanism is mechanically connected to the actuator; the actuator is mechanically connected to the wheels.

[0111] Embodiment 4

[0112] Based on the above vehicle steering assist adaptive control system based on human body information, Embodiment 4 of the present invention provides a vehicle. The vehicle is provided with the vehicle steering assist adaptive control system based on human body information described in the above embodiment. Since the above vehicle steering assist adaptive control system based on human body information has the above technical effects, for the technical effects of the vehicle using the vehicle steering assist adaptive control system based on human body information, please refer to the above embodiment.

[0113] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0114] The foregoing are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vehicle steering assist adaptive control method based on human body information, characterized in that: include: Use the steering wheel input torque and vehicle speed to build a basic power assist current control function; Acquiring driver weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information, and generating a power assist gain coefficient based on a comparison result between the driver weight information, the seat position information, the steering wheel height adjustment information, and the steering wheel telescopic length information and corresponding preset thresholds; According to the power assist gain coefficient and the basic power assist current control function, the motor power assist current control function is obtained; The real-time steering wheel input torque and the real-time vehicle speed are obtained, and the real-time steering wheel input torque and the real-time vehicle speed are processed by the motor assist current control function to obtain the motor assist current so that the assist motor outputs the corresponding assist torque.

2. The vehicle steering assist adaptive control method based on human body information as claimed in claim 1, characterized in that: The generating of the power assist gain coefficient based on the comparison result of the driver weight information, the seat position information, the steering wheel height adjustment information and the steering wheel telescopic length information with the corresponding preset threshold value comprises: generating a first power assist gain coefficient based on a ratio of the driver's weight information to a preset human body weight threshold; generating a second power assist gain coefficient based on a ratio of the seat position information to a maximum seat movement distance; generating a third power assist gain coefficient based on a ratio of the steering wheel height adjustment information to a maximum steering wheel adjustment distance; A fourth power assist gain coefficient is generated based on the ratio of the steering wheel telescopic length information to the maximum telescopic distance of the steering wheel.

3. The vehicle steering assist adaptive control method based on human body information as claimed in claim 2, characterized in that: The first boost gain coefficient is expressed as: k1=(m0-m)*k1 max / min / m0; In the formula, m0 represents the human weight threshold, m represents the driver's weight information, k1 max / min Indicates the maximum / minimum value of the first power-assistance gain coefficient; The second boost gain coefficient is expressed as: k2=W*k2 max / min / IN max ; Where W represents the seat position information, k2 max / min Indicates the maximum / minimum value of the second boost gain coefficient, W max Indicates the maximum movement distance of the seat; The third boost gain coefficient is expressed as: k3=H*k3 max / min / H max ; Where H represents the steering wheel height adjustment information, k3 max / min Indicates the maximum / minimum value of the third boost gain coefficient, H max Indicates the maximum adjustment distance of the steering wheel; The fourth boost gain coefficient is expressed as: k4=L*k4 max / min / THE max ; Where L represents the telescopic length of the steering wheel, k4 max / min Indicates the maximum / minimum value of the third boost gain coefficient, L max Indicates the maximum extension and retraction distance of the steering wheel.

4. The vehicle steering assist adaptive control method based on human body information as claimed in claim 2, characterized in that: The method of obtaining the motor assist current control function according to the assist gain coefficient and the basic assist current is as follows: the corresponding assist gain current is determined by multiplying the first assist gain coefficient, the second assist gain coefficient and the third assist gain coefficient by the basic assist current, and the motor assist current control function is determined in combination with the basic assist current control function.

5. The vehicle steering assist adaptive control method based on human body information as claimed in claim 2, characterized in that: Also includes: In response to the input operation of the driver, calculation of the first assist gain coefficient, the second assist gain coefficient, the third assist gain coefficient and / or the fourth assist gain coefficient is terminated.

6. The vehicle steering assist adaptive control method based on human body information as claimed in claim 2, characterized in that: The motor assist current control function is expressed as: I a =(1+k1+k2+k3+k4)*f(T d ,V); Wherein, k1 represents the first power-assistance gain coefficient, k2 represents the second power-assistance gain coefficient, k3 represents the third power-assistance gain coefficient, k4 represents the fourth power-assistance gain coefficient, f(T d , V) represents the basic assist current control function, T d represents the steering wheel input torque, and V represents the vehicle speed.

7. The vehicle steering assist adaptive control device based on human body information is characterized in that: include: The basic control module is configured to: construct a basic power assist current control function using the steering wheel input torque and vehicle speed; The adaptive control module is configured to: obtain driver weight information, seat position information, steering wheel height adjustment information and steering wheel telescopic length information, and generate a power assist gain coefficient based on a comparison result between the driver weight information, the seat position information, the steering wheel height adjustment information and the steering wheel telescopic length information and a corresponding preset threshold value; According to the power assist gain coefficient and the basic power assist current control function, the motor power assist current control function is obtained; The real-time steering wheel input torque and the real-time vehicle speed are obtained, and the real-time steering wheel input torque and the real-time vehicle speed are processed by the motor assist current control function to obtain the motor assist current so that the assist motor outputs the corresponding assist torque.

8. The automobile steering assist adaptive control system based on human body information is characterized in that: include: A data acquisition unit, used to collect driver weight information, seat position information, steering wheel height adjustment information, steering wheel telescopic length information, real-time steering wheel input torque and real-time vehicle speed; Steering control unit, used to construct basic power assist current control function using steering wheel input torque and vehicle speed; Acquiring driver weight information, seat position information, steering wheel height adjustment information, and steering wheel telescopic length information, and generating a power assist gain coefficient based on a comparison result between the driver weight information, the seat position information, the steering wheel height adjustment information, and the steering wheel telescopic length information and corresponding preset thresholds; According to the power assist gain coefficient and the basic power assist current control function, the motor power assist current control function is obtained; Acquire the real-time steering wheel input torque and the real-time vehicle speed, and process the real-time steering wheel input torque and the real-time vehicle speed through the motor assist current control function to acquire the motor assist current; The power-assist motor is used to output the power-assist torque corresponding to the motor power-assist current to drive the steering wheel to rotate.

9. The automobile steering assist adaptive control system based on human body information as claimed in claim 8, characterized in that: It also includes a central control screen, which is used to obtain the driver's input operation and transmit it to the control unit. The control unit terminates the calculation of the first power assist gain coefficient, the second power assist gain coefficient, the third power assist gain coefficient and / or the fourth power assist gain coefficient in response to the driver's input operation.

10. An automobile, characterized in that: The invention comprises the automobile power steering adaptive control system as described in any one of claims 8 to 9.

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