Minimum door closing energy calculation method and system

Abstract

The present invention discloses a method and system for calculating minimum door closing energy, belonging to the field of vehicle component testing technology. The method comprises: converting multiple key factors affecting door closing energy into numerical parameters to calculate a curve showing the relationship between each key factor and the door closing angle when the door is closed; inputting the initial door closing angle and initial door closing energy into the relationship between each key factor and the door closing angle to obtain the current door residual energy and the current door angle; and determining whether the real-time door residual energy and the real-time door angle are both less than zero. If so, the minimum door closing energy is obtained; if not, the initial door closing angle is reduced and the initial door closing energy is increased, iteratively executing the previous steps until both are less than zero. In the early stages of door closing force development, this method inputs door-related design parameters, layout information, and other information to calculate the minimum door closing energy and contribution, identifying door closing force risks and enabling early improvements, thereby reducing development cycles and costs.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle component testing, and in particular to a method and system for calculating minimum door closing energy. Background Art

[0002] Door closing force is a common customer complaint, drawing significant attention from major automakers. Door closing force is a systemic issue, influenced by factors such as the seal, air pressure resistance, stoppers, door center of mass / mass, hinges, and door locks. These design parameters influence door closing force while also impacting the layout and performance of other solutions.

[0003] The development of door closing force is currently usually based on experience. The design plan is determined by comprehensively considering the door closing force and other factors. After the prototype is manufactured, it is adjusted in combination with the actual vehicle closing force test and evaluation. In addition, based on the customer's feelings and experience, the door closing force usually uses the minimum closing energy to evaluate the lightness of the door closing. The test equipment, methods and test result verification methods related to door closing energy disclosed in the existing related technology are all based on the actual door to obtain door closing energy information through testing means. However, this type of method is only applicable to the later stage of door closing force development. Target confirmation or improvement optimization is carried out according to the test results. The development cycle is long and the cost is high. Summary of the Invention

[0004] The present invention aims to solve the problem of how to accurately calculate the gravity torque change curve of a door during the closing process based on key influencing parameters such as the door mass and structural parameters, so as to achieve accurate evaluation and control of the minimum closing energy requirement.

[0005] To this end, the first purpose of the present invention is to propose a minimum door closing energy calculation method, which calculates the minimum door closing energy and contribution in the early stage of door closing force development to identify door closing force risks.

[0006] To this end, a second object of the present invention is to provide a minimum door closing energy calculation system.

[0007] A third object of the present invention is to provide a computer device.

[0008] A fourth object of the present invention is to provide a non-transitory computer-readable storage medium.

[0009] To achieve the above-mentioned purpose, the first embodiment of the present invention proposes a method for calculating the minimum door closing energy, which includes the following steps: Step S1, converting multiple key influencing factors of the door closing energy into numerical parameters to calculate the change curve of each key influencing factor and the door closing angle when the door is closed; Step S2, inputting the initial door closing angle and the initial door closing energy into the change relationship between each key influencing factor and the door closing angle to obtain the current door residual energy and the current door angle; Step S3, judging whether the real-time door residual energy and the real-time door angle are both less than zero, if so, obtaining the minimum door closing energy, if not, reducing the initial door closing angle and increasing the initial door closing energy, and iteratively executing step S2 until both are less than zero.

[0010] The minimum door closing energy calculation method of the embodiment of the present invention is a method for obtaining the minimum door closing energy by means of testing in the early stage of vehicle door closing force development. By inputting design parameters and layout information related to the vehicle door, the minimum door closing energy and contribution are calculated, and then the closing force risk is identified and improved as soon as possible. At the same time, it can also serve as a guide for the formulation of improvement plans when the actual vehicle closing force problem occurs, thereby reducing development cycle and cost.

[0011] In addition, the minimum door closing energy calculation method according to the above embodiment of the present invention may also have the following additional technical features:

[0012] Furthermore, in one embodiment of the present invention, the key influencing factors include: hinge torque, door lock parameters, door quality parameters, limiter torque, sealing strip parameters and air pressure resistance parameters.

[0013] Furthermore, in one embodiment of the present invention, the step S1 specifically includes: step S101, calculating a first variation curve of the hinge torque with the door closing angle; step S102, calculating a second variation curve of the door lock parameters with the door closing angle, wherein the door lock parameters include a variation curve of the door lock locking force with the stroke displacement, and a distance between the door lock and the hinge axis; step S103, calculating a third variation curve of the door mass parameters with the door closing angle, wherein the door mass parameters include the door mass, the moment of inertia of the door around the hinge axis, the center of mass of the door, and the distance between the door and the hinge axis. Mark, hinge position coordinates; step S104, calculate the fourth change curve of the limiter torque with the door closing angle; step S105, calculate the fifth change curve of the sealing strip parameters with the door closing angle, wherein the sealing strip parameters include the sealing strip position point coordinates, the sealing strip compression load curve, the sealing strip cross-sectional area change curve, the number of exhaust holes, and the size of the exhaust holes; step S106, calculate the sixth change curve of the air pressure resistance parameters with the door closing angle, wherein the air pressure resistance parameters include the shape and size of the car door, the volume of the cavity inside the car, the area of ​​the pressure relief valve, and the air tightness leakage.

[0014] Furthermore, in one embodiment of the present invention, the step S2 specifically includes: step S201, inputting the initial door closing energy; step S202, calculating the door speed using the initial door closing energy and the door rotational inertia; step S203, inputting the initial door closing angle, solving the door angle using the door speed and the initial door closing angle, and then calculating the hinge energy, door lock energy, gravity energy, limiter energy and sealing strip energy based on the first change curve, the second change curve, the third change curve, the fourth change curve and the fifth change curve; step S204, calculating the piezoresistive torque and piezoresistive energy based on the door angle, the vehicle speed, the piezoresistive parameters and the sixth change curve; step S205, calculating the current door residual energy based on the initial door closing energy and the energy information obtained in steps S203 and S204.

[0015] To achieve the above-mentioned purpose, the second embodiment of the present invention proposes a minimum door closing energy calculation system, including: a change curve solving module, used to convert multiple key influencing factors of door closing energy into numerical parameters, so as to calculate the change curve of each key influencing factor and the door closing angle when the door is closed; a residual energy solving module, used to input the initial door closing angle and the initial door closing energy into the change relationship between each key influencing factor and the door closing angle, and obtain the current door residual energy and the current door angle; a judgment module, used to judge whether the real-time door residual energy and the real-time door angle are both less than zero, if so, the minimum door closing energy is obtained, if not, the initial door closing angle is reduced and the initial door closing energy is increased, and the residual energy solving module is iteratively executed until both are less than zero.

[0016] The minimum door closing energy calculation system of the embodiment of the present invention obtains the minimum door closing energy by means of testing in the early stage of vehicle door closing force development. By inputting the design parameters and layout information related to the vehicle door, the minimum door closing energy and contribution are calculated, and then the closing force risk is identified and improved as soon as possible. At the same time, it can also serve as a guide for the formulation of improvement plans when the actual vehicle closing force problem occurs, thereby reducing the development cycle and cost.

[0017] In addition, the minimum door closing energy calculation system according to the above embodiment of the present invention may also have the following additional technical features:

[0018] Furthermore, in one embodiment of the present invention, the key influencing factors include: hinge torque, door lock parameters, door quality parameters, limiter torque, sealing strip parameters and air pressure resistance parameters.

[0019] Furthermore, in one embodiment of the present invention, the variation curve solving module specifically includes: a first calculation unit for calculating a first variation curve of the hinge torque with the door closing angle; a second calculation unit for calculating a second variation curve of the door lock parameters with the door closing angle, wherein the door lock parameters include a variation curve of the door lock locking force with the stroke displacement and a distance between the door lock and the hinge axis; a third calculation unit for calculating a third variation curve of the door mass parameters with the door closing angle, wherein the door mass parameters include the door mass, the moment of inertia of the door around the hinge axis, the door mass Center coordinates, hinge position coordinates; a fourth calculating unit is used to calculate the fourth change curve of the limiter torque with the door closing angle; a fifth calculating unit is used to calculate the fifth change curve of the sealing strip parameters with the door closing angle, wherein the sealing strip parameters include the sealing strip position point coordinates, the sealing strip compression load curve, the sealing strip cross-sectional area change curve, the number of exhaust holes, and the size of the exhaust holes; a sixth calculating unit is used to calculate the sixth change curve of the air pressure resistance parameters with the door closing angle, wherein the air pressure resistance parameters include the shape and size of the car door, the volume of the cavity inside the car, the area of ​​the pressure relief valve, and the airtightness leakage.

[0020] Furthermore, in one embodiment of the present invention, the residual energy solving module specifically includes: an input unit for inputting the initial door closing energy; a door speed solving unit for calculating the door speed using the initial door closing energy and the door rotational inertia; a first energy solving unit for inputting the initial door closing angle, solving the door angle using the door speed and the initial door closing angle, and then calculating the hinge energy, door lock energy, gravity energy, limiter energy and sealing strip energy according to the first change curve, the second change curve, the third change curve, the fourth change curve and the fifth change curve; a second energy solving unit for calculating the piezoresistive torque and piezoresistive energy according to the door angle, the vehicle speed, the piezoresistive parameter and the sixth change curve; a residual energy solving unit for calculating the current door residual energy based on the initial door closing energy and the energy information obtained by the first energy solving unit and the first energy solving unit.

[0021] To achieve the above objectives, a third embodiment of the present invention proposes a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any of the above methods when executing the computer program.

[0022] To achieve the above objectives, a fourth aspect of the present invention provides a non-temporary computer-readable storage medium having a computer program stored thereon, which implements the steps of the method described above when the computer program is executed by a processor.

[0023] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 is a flow chart of a method for calculating minimum door closing energy according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of a specific implementation of a method for calculating minimum door closing energy according to an embodiment of the present invention;

[0027] Figure 3 It is a structural diagram of a minimum door closing energy calculation system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0029] The following describes a method and system for calculating minimum door closing energy according to an embodiment of the present invention with reference to the accompanying drawings.

[0030] Figure 1 The figure is a flow chart of a method for calculating minimum door closing energy according to an embodiment of the present invention.

[0031] like Figure 1 As shown, the minimum door closing energy calculation method includes the following steps:

[0032] In step S1 , multiple key influencing factors of door closing energy are converted into numerical parameters to calculate a variation curve of each key influencing factor and the door closing angle when the door is closed.

[0033] Among them, the key influencing factors include: hinge torque, door lock parameters, door quality parameters, limiter torque, sealing strip parameters and air pressure resistance parameters.

[0034] Specifically, if Figure 2 As shown, step S1 in the embodiment of the present invention specifically includes:

[0035] Step S101, using a numerical analysis method based on MATLAB, inputting the hinge torque, and then calculating a first variation curve of the hinge torque versus the door closing angle;

[0036] Step S102 , using a numerical analysis method based on MATLAB, input door lock parameters, including a curve showing a change in door lock locking force versus travel displacement and a distance between the door lock and the hinge axis, to calculate a second curve showing a change in door lock parameters versus door closing angle, using the formula T = F × d / θ;

[0037] Step S103: Using numerical analysis methods based on MATLAB, input door mass parameters including door mass m, door moment of inertia J around the hinge axis, door center of mass coordinates Z x =(x,y,z), hinge position coordinates J L1 =(x1,y1,z1),J L2 =(x2, y2, z2), and thus calculate the third variation curve of the door mass parameter with the door closing angle, that is, the variation curve of the gravity torque with the door closing angle, which is specifically:

[0038] First calculate the center of mass coordinate Z x The coordinate of the center of mass Z after rotating around the hinge axis by angle θ x ′=(x′,y′,z′);

[0039]

[0040]

[0041] Then calculate the vector Z formed by the center of mass position and the lower hinge position x X L =Z x ′-J L1 , the vector J formed by the upper and lower hinge positions L X L =J L2 -J L1 ;

[0042] Then calculate the vector GX in the direction of closing the door L =J L X L ×Z X X L ;

[0043] Then calculate the projection of the Z vector in the door closing direction t = GX L ·ZX L / |J L X L |, among which ZX L =(0,0,1);

[0044] Then calculate the distance from the center of mass to the hinge axis r1=|J L X L ×Z x X L | / |J LX L |;

[0045] Then calculate the torque T = m·g·t·r generated by the gravity component in the closing direction i ;

[0046] Step S104, using a numerical analysis method based on MATLAB, inputting the limiter torque, and calculating a fourth variation curve of the limiter torque versus the door closing angle;

[0047] In step S105, a numerical analysis method based on MATLAB is used to input sealing strip parameters, including the sealing strip location coordinates (points are taken at approximately 100 mm lengths), the sealing strip compression load curve, the sealing strip cross-sectional area variation curve, the number of vents, and the vent size. The fifth variation curve of the sealing strip parameters versus door closing angle is calculated. The principle is: the sealing strip is divided into N segments according to the location coordinates, the torque of each sealing strip segment is calculated, and then the torque of each sealing strip segment is added together to obtain the total sealing strip torque, as shown below:

[0048] First, the length of each sealing strip segment is calculated based on the coordinates of the sealing strip position points, and then the actual compression load curve of each sealing strip segment is obtained;

[0049] The torque calculation formula for each time step is T i =F i ×r i , r i The distance between each sealing strip segment and the hinge axis is calculated using the same method as the distance from the center of mass to the hinge axis in step S103;

[0050] Finally, the torque of each sealing strip is superimposed T = ∑T i ;

[0051] Step S106: Using a numerical analysis method based on MATLAB, inputting piezoresistive parameters, including the shape and size of the vehicle door, the volume of the vehicle cavity, the area of ​​the pressure relief valve, and the airtightness leakage, calculates a sixth curve of the piezoresistive parameters versus the door closing angle. Specifically:

[0052] First solve the following differential equation to obtain the air pressure p inside the car:

[0053] Where K is a constant;

[0054] Then calculate the air pressure resistance F = (p-p0)·L·h;

[0055] Then calculate the torque generated by air pressure resistance T = F × L / 2;

[0056] In step S2, the initial door closing angle and the initial door closing energy are input into the changing relationship between each key influencing factor and the door closing angle to obtain the current door remaining energy and the current door angle.

[0057] Specifically, if Figure 2 As shown, step S2 specifically includes:

[0058] Step S201, inputting initial door closing energy;

[0059] Step S202, calculating the door speed using the initial door closing energy and the door rotational inertia;

[0060] In step S203, the initial door closing angle (determined by the door closing gear) is input, and the door angle is solved using the door speed and the initial door closing angle. Then, the hinge energy, door lock energy, gravity energy, stopper energy, and sealing strip energy are calculated based on the first change curve, the second change curve, the third change curve, the fourth change curve, and the fifth change curve. The energy calculation formulas are:

[0061] E = T × Δθ;

[0062] Step S204, calculating the piezoresistive torque and piezoresistive energy at the angle according to the door angle, vehicle speed, piezoresistive parameter, and the sixth variation curve;

[0063] In step S205, the current remaining energy of the door is calculated based on the initial door closing energy and the energy information obtained in steps S203 and S204. Specifically, the remaining energy is: remaining energy = initial energy - hinge energy - door lock energy - gravity energy - limiter energy - sealing strip energy - air pressure resistance energy.

[0064] In step S3, determine whether the real-time door remaining energy and the real-time door angle are both less than zero. If so, obtain the minimum door closing energy. If not, reduce the initial door closing angle and increase the initial door closing energy, and iterate step S2 until both are less than zero.

[0065] Specifically, if Figure 2 As shown, when the current door residual energy is positive, it means that the door has the ability to close, and the door closing angle is reduced. Step S2 is repeated to calculate the energy information of each influencing factor at the current angle and the door residual energy until the door residual energy is negative. When the current door residual energy is negative, it means that the door no longer has the ability to close, and the door angle is determined.

[0066] When the current door angle is a positive number, it means that the door energy is exhausted and the door cannot be fully closed. At this time, the initial input energy is increased, and step S2 is repeated, and the above-mentioned current door remaining energy is determined to be less than zero until the current door angle is a negative number, which means that the door energy is exhausted and the door can be fully closed.

[0067] When the input initial energy just makes the car door completely closed after the energy is exhausted, the input initial energy at this time is the minimum door closing energy. Then, when closing the door with the minimum door closing energy, the hinge energy at each angle in step S2 is added to obtain the hinge contribution of the door closing energy. The door lock contribution, gravity contribution, limiter contribution, sealing strip contribution and air pressure resistance contribution can be calculated in the same way.

[0068] According to the minimum door closing energy calculation method proposed in an embodiment of the present invention, in the early stage of door closing force development, the minimum door closing energy is obtained by testing. By inputting the design parameters and layout information related to the door, the minimum door closing energy and contribution are calculated, and then the door closing force risk is identified and improved as soon as possible. At the same time, it can also serve as a guide for the formulation of improvement plans when the door closing force problem of the actual vehicle is encountered, thereby reducing the development cycle and cost.

[0069] Next, the minimum door closing energy calculation system proposed according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0070] Figure 3 It is a structural diagram of a minimum door closing energy calculation system according to an embodiment of the present invention.

[0071] like Figure 3 As shown, the system 10 includes: a change curve solving module 100 , a residual energy solving module 200 and a judgment module 300 .

[0072] The variation curve solving module 100 is used to convert multiple key factors affecting door closing energy into numerical parameters to calculate the variation curve of each key factor and the door closing angle when the door is closed. The residual energy solving module 200 is used to input the initial door closing angle and initial door closing energy into the variation relationship between each key factor and the door closing angle to obtain the current door residual energy and the current door angle. The judgment module 300 is used to determine whether the real-time door residual energy and the real-time door angle are both less than zero. If so, the minimum door closing energy is obtained. If not, the initial door closing angle is reduced and the initial door closing energy is increased. The residual energy solving module is iteratively executed until both are less than zero.

[0073] Furthermore, in one embodiment of the present invention, the key influencing factors include: hinge torque, door lock parameters, door quality parameters, limiter torque, sealing strip parameters and air pressure resistance parameters.

[0074] Furthermore, in one embodiment of the present invention, the variation curve solving module specifically includes: a first calculation unit for calculating a first variation curve of the hinge torque with the door closing angle; a second calculation unit for calculating a second variation curve of the door lock parameters with the door closing angle, wherein the door lock parameters include a variation curve of the door lock locking force with the stroke displacement and a distance between the door lock and the hinge axis; a third calculation unit for calculating a third variation curve of the door mass parameters with the door closing angle, wherein the door mass parameters include the door mass, the moment of inertia of the door around the hinge axis, the center of mass of the door Coordinates, hinge position coordinates; a fourth calculation unit is used to calculate the fourth change curve of the limiter torque with the door closing angle; a fifth calculation unit is used to calculate the fifth change curve of the sealing strip parameters with the door closing angle, wherein the sealing strip parameters include the sealing strip position point coordinates, the sealing strip compression load curve, the sealing strip cross-sectional area change curve, the number of exhaust holes, and the size of the exhaust holes; a sixth calculation unit is used to calculate the sixth change curve of the air pressure resistance parameters with the door closing angle, wherein the air pressure resistance parameters include the shape and size of the car door, the volume of the cavity inside the car, the area of ​​the pressure relief valve, and the air tightness leakage.

[0075] Furthermore, in one embodiment of the present invention, the residual energy solving module specifically includes: an input unit for inputting the initial door closing energy; a door speed solving unit for calculating the door speed using the initial door closing energy and the door rotational inertia; a first energy solving unit for inputting the initial door closing angle, solving the door angle using the door speed and the initial door closing angle, and then calculating the hinge energy, door lock energy, gravity energy, limiter energy and sealing strip energy based on the first change curve, the second change curve, the third change curve, the fourth change curve and the fifth change curve; a second energy solving unit for calculating the piezoresistive torque and piezoresistive energy based on the door angle, vehicle speed, piezoresistive parameters and the sixth change curve; and a residual energy solving unit for calculating the current door residual energy based on the initial door closing energy and the energy information obtained by the first energy solving unit and the first energy solving unit.

[0076] It should be noted that the above explanations focusing on the embodiment of the minimum door closing energy calculation method are also applicable to the system of the embodiment of the present invention. The implementation principles are similar and will not be repeated here.

[0077] According to the minimum door closing energy calculation system proposed in an embodiment of the present invention, in the early stage of vehicle door closing force development, a method for obtaining the minimum door closing energy by means of testing is used. By inputting the design parameters and layout information related to the vehicle door, the minimum door closing energy and contribution are calculated, thereby identifying the closing force risk and making improvements as early as possible. At the same time, it can also serve as a guide for the formulation of improvement plans when the actual vehicle closing force problem occurs, thereby reducing the development cycle and cost.

[0078] In order to implement the above embodiment, the present invention also proposes a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, an equivalent calculation method for the piecewise linear stiffness of a sealing strip as in the above embodiment is implemented.

[0079] To implement the above embodiment, the present invention further proposes a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the equivalent calculation method of the piecewise linear stiffness of a sealing strip as in the above embodiment is implemented.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "N" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0082] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing a custom logical function or step of a process, and the scope of the preferred embodiments of the invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of the invention pertain.

[0083] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or N wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing it in a suitable manner if necessary, and then storing it in a computer memory.

[0084] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having logic gate circuits for implementing logic functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0085] Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above-mentioned embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0086] Furthermore, the functional units in the various embodiments of the present invention may be integrated into a single processing module, each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0087] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and are not to be construed as limiting the present invention. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for calculating minimum door closing energy, characterized in that: The following steps are involved: Step S1, converting multiple key influencing factors of door closing energy into numerical parameters to calculate a variation curve of each key influencing factor and the door closing angle when the door is closed; Step S2, inputting the initial door closing angle and the initial door closing energy into the relationship between each key influencing factor and the door closing angle, to obtain the current door remaining energy and the current door angle; Step S3, determining whether the current door residual energy and the current door angle are both less than zero; if so, obtaining the minimum door closing energy; if not, reducing the initial door closing angle and increasing the initial door closing energy, iterating step S2 until both are less than zero; The key influencing factors include: hinge torque, door lock parameters, door quality parameters, limiter torque, sealing strip parameters and air pressure resistance parameters; The step S1 specifically includes: Step S101, calculating a first variation curve of the hinge torque versus the door closing angle; Step S102, calculating a second variation curve of the door lock parameters as a function of the door closing angle, wherein the door lock parameters include a variation curve of the door lock locking force as a function of the travel displacement, and a distance between the door lock and the hinge axis; Step S103, calculating a third variation curve of the door mass parameter versus the door closing angle, wherein the door mass parameter includes the door mass, the moment of inertia of the door about the hinge axis, the coordinates of the door center of mass, and the coordinates of the hinge position; Step S104, calculating a fourth variation curve of the limiter torque versus the door closing angle; Step S105, calculating a fifth variation curve of the sealing strip parameters as a function of the door closing angle, wherein the sealing strip parameters include the sealing strip position coordinates, the sealing strip compression load curve, the sealing strip cross-sectional area variation curve, the number of vents, and the vent size; Step S106, calculating a sixth variation curve of the piezoresistive parameters versus the door closing angle, wherein the piezoresistive parameters include the shape and size of the door, the volume of the cavity inside the vehicle, the area of ​​the pressure relief valve, and the airtightness leakage; The third variation curve of the door mass parameter with the door closing angle is calculated, that is, the variation curve of the gravity torque with the door closing angle, specifically: First calculate the center of mass coordinates Rotation around the hinge axis The coordinates of the centroid after the angle ; Then calculate the vector formed by the center of mass position and the lower hinge position , the vector formed by the upper and lower hinge positions ; Then calculate the vector of the door closing direction ; Then calculate the projection of the Z vector in the direction of closing the door ,in, =(0,0,1); Then calculate the distance from the center of mass to the hinge axis ; Then calculate the torque generated by the gravity in the closing direction ; Where: is the centroid coordinate Rotation around the hinge axis The x-axis coordinate after the angle; is the centroid coordinate Rotation around the hinge axis The y-axis coordinate after the angle; is the centroid coordinate Rotation around the hinge axis The z-axis coordinate after the angle; for The x-axis coordinate of the door's center of mass; for The y-axis coordinate of the door's center of mass; for The z-axis coordinate of the center of mass of the door; For the lower hinge x-axis coordinate of the position; y For the lower hinge The y-axis coordinate of the position; z For the lower hinge The z-axis coordinate of the position; For the upper hinge The x-axis coordinate of the position; For the upper hinge The y-axis coordinate of the position; For the upper hinge The z-axis coordinate of the position; 、 、 are the upper and lower hinge axis vector components; is the coordinate of the center of mass of the door, The door's center of mass rotates around the hinge axis The coordinates of the centroid after the angle; is the lower hinge coordinate, is the upper hinge coordinate; is the vector formed by the upper and lower hinge positions, The vector formed by the center of mass position and the lower hinge position; ； t is the projection of the Z vector in the door closing direction; m is the mass of the door, g is the acceleration due to gravity; r 1 is the distance from the center of mass to the hinge axis; r i It is the distance from the center of mass to the hinge axis at each rotation angle of the door.

2. The method for calculating the minimum door closing energy according to claim 1, characterized in that: The step S2 specifically includes: Step S201, inputting the initial door closing energy; Step S202, calculating the door speed using the initial door closing energy and the door rotational inertia; Step S203: inputting the initial door closing angle, calculating the door angle using the door speed and the initial door closing angle, and then calculating hinge energy, door lock energy, gravity energy, stopper energy, and sealing strip energy based on the first variation curve, the second variation curve, the third variation curve, the fourth variation curve, and the fifth variation curve; Step S204, calculating the piezoresistive torque and the piezoresistive energy according to the door angle, the door speed, the piezoresistive parameter, and the sixth variation curve; Step S205 , calculating the current door remaining energy based on the initial door closing energy and the energy information obtained in steps S203 and S204 .

3. A minimum door closing energy calculation system, characterized in that: include: A change curve solving module is used to convert multiple key influencing factors of door closing energy into numerical parameters to calculate the change curve of each key influencing factor and the door closing angle when the door is closed; A residual energy solving module is used to input the initial door closing angle and the initial door closing energy into the changing relationship between each key influencing factor and the door closing angle to obtain the current door residual energy and the current door angle; a judgment module, configured to judge whether the current door residual energy and the current door angle are both less than zero; if so, obtaining the minimum door closing energy; if not, reducing the initial door closing angle and increasing the initial door closing energy, and iteratively executing the residual energy solution module until both are less than zero; The key influencing factors include: hinge torque, door lock parameters, door quality parameters, limiter torque, sealing strip parameters and air pressure resistance parameters; The change curve solving module specifically includes: a first calculating unit, configured to calculate a first variation curve of the hinge torque versus a door closing angle; a second calculating unit, configured to calculate a second variation curve of the door lock parameters as a function of the door closing angle, wherein the door lock parameters include a variation curve of the door lock locking force as a function of the travel displacement, and a distance between the door lock and the hinge axis; a third calculating unit, configured to calculate a third variation curve of the door mass parameter as a function of the door closing angle, wherein the door mass parameter includes the door mass, the moment of inertia of the door about the hinge axis, the coordinates of the door center of mass, and the coordinates of the hinge position; a fourth calculating unit, configured to calculate a fourth variation curve of the torque of the limiter versus the door closing angle; a fifth calculating unit, configured to calculate a fifth variation curve of the sealing strip parameters as a function of the door closing angle, wherein the sealing strip parameters include the sealing strip position coordinates, the sealing strip compression load curve, the sealing strip cross-sectional area variation curve, the number of vents, and the size of the vents; a sixth calculating unit, configured to calculate a sixth variation curve of the piezoresistive parameter as a function of the door closing angle, wherein the piezoresistive parameter includes the shape and size of the door, the volume of the cavity inside the vehicle, the area of ​​the pressure relief valve, and the airtightness leakage; The third variation curve of the door mass parameter with the door closing angle is calculated, that is, the variation curve of the gravity torque with the door closing angle, specifically: First calculate the center of mass coordinates Rotation around the hinge axis The coordinates of the centroid after the angle ; Then calculate the vector formed by the center of mass position and the lower hinge position , the vector formed by the upper and lower hinge positions ; Then calculate the vector of the closing direction ; Then calculate the projection of the Z vector in the direction of closing the door ,in, =(0,0,1); Then calculate the distance from the center of mass to the hinge axis ; Then calculate the torque generated by the gravity in the closing direction ; Where: is the centroid coordinate Rotation around the hinge axis The x-axis coordinate after the angle; is the centroid coordinate Rotation around the hinge axis The y-axis coordinate after the angle; is the centroid coordinate Rotation around the hinge axis The z-axis coordinate after the angle; for The x-axis coordinate of the door's center of mass; for The y-axis coordinate of the door's center of mass; for The z-axis coordinate of the center of mass of the door; For the lower hinge x-axis coordinate of the position; y For the lower hinge The y-axis coordinate of the position; z For the lower hinge The z-axis coordinate of the position; For the upper hinge The x-axis coordinate of the position; For the upper hinge The y-axis coordinate of the position; For the upper hinge The z-axis coordinate of the position; 、 、 are the upper and lower hinge axis vector components; is the coordinate of the center of mass of the door, The door's center of mass rotates around the hinge axis The coordinates of the centroid after the angle; is the lower hinge coordinate, is the upper hinge coordinate; is the vector formed by the upper and lower hinge positions, The vector formed by the center of mass position and the lower hinge position ； t is the projection of the Z vector in the door closing direction; m is the mass of the door, g is the acceleration due to gravity; r 1 is the distance from the center of mass to the hinge axis; r i It is the distance from the center of mass to the hinge axis at each rotation angle of the door.

4. The minimum door closing energy calculation system according to claim 3, characterized in that: The residual energy solution module specifically includes: An input unit, used for inputting the initial door closing energy; A door speed calculating unit, configured to calculate the door speed using the initial door closing energy and the door rotational inertia; a first energy calculating unit, configured to input the initial door closing angle, calculate the door angle using the door speed and the initial door closing angle, and then calculate hinge energy, door lock energy, gravity energy, stopper energy, and sealing strip energy based on the first variation curve, the second variation curve, the third variation curve, the fourth variation curve, and the fifth variation curve; a second energy solving unit, configured to calculate the piezoresistive torque and the piezoresistive energy according to the door angle, the door speed, the piezoresistive parameter, and the sixth variation curve; The residual energy solving unit is used to calculate the current residual energy of the vehicle door based on the initial door closing energy and the energy information obtained by the first energy solving unit and the second energy solving unit.

5. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 2 are implemented.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 2 are implemented.

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