Method, device and equipment for calculating centroid height bandwidth of automobile research and development platform
By integrating a multi-dimensional collaborative calculation model of wheel, suspension, and sprung component parameter sets, and using the extreme value method to calculate the center of gravity height bandwidth of the automotive R&D platform, the problem of inaccurate center of gravity height assessment in the early stage of platform development was solved, and the stability and handling of vehicle performance were improved.
Patent Information
- Application Number
- CN202511229123.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2025-11-28
AI Technical Summary
In the early stages of automotive R&D platform development, the lack of accurate methods for assessing the center of gravity height resulted in significant errors in vehicle stability and handling, affecting vehicle performance.
By integrating three core parameter groups—wheels, suspension, and sprung components—a multi-dimensional collaborative calculation model is constructed. The extreme value method is used to calculate the centroid height bandwidth, reducing the limitations of single-parameter analysis and improving the accuracy of parameter coupling effects.
It improves the accuracy of center of gravity height bandwidth calculation, ensuring the stability and handling of various models on the platform, reducing design deviations, and improving R&D efficiency and robustness.
Smart Images
Figure CN121026596A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive R&D platform technology, and more specifically, to a method, apparatus, and equipment for calculating the centroid height bandwidth of an automotive R&D platform. Background Technology
[0002] In the field of automotive R&D, to accelerate vehicle development, increase vehicle reliability, improve R&D efficiency, and reduce manufacturing costs, various OEMs develop common automotive R&D platforms to achieve modular production. An automotive platform is a standardized infrastructure and technology system that provides shared core modules, technical parameters, and manufacturing standards for the R&D, design, and production of multiple different vehicle models. Different models can have their external styling changed on the platform, but key components such as the core powertrain layout, chassis structure, and electronic and electrical architecture remain unified or highly compatible. It is an important means for automotive companies to achieve efficient and large-scale R&D.
[0003] To ensure the stability, handling, and safety of various vehicle models on the platform, a reasonable center of gravity height bandwidth (center of gravity height refers to the vertical distance from the vehicle's center of gravity to the ground, and center of gravity height bandwidth refers to the range of center of gravity height variation that the platform can support for different vehicle models) needs to be set in the early stages of platform development. This bandwidth is used for the analysis and design of the mechanical properties of digital prototype vehicles for various models on the platform, so as to ensure that the stability, handling, and safety of all derived models can meet the standards.
[0004] In the early stages of platform development, without vehicle data and prototypes, there is a lack of means to assess the center of gravity height of the platform's vehicles. Generally, estimations are made through analogy or empirical formulas. However, these methods have significant errors, leading to substantial systemic deviations and impacting the vehicle's stability and handling. Summary of the Invention
[0005] In view of this, the present invention provides a method, apparatus and device for calculating the centroid height bandwidth of an automotive R&D platform, which can improve the accuracy of calculating the centroid height bandwidth of an automotive R&D platform.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for calculating the centroid height bandwidth of an automotive R&D platform, the method comprising: Obtain target parameter sets for each compatible vehicle model, wherein the target parameter sets include wheel parameter sets, suspension parameter sets, and sprung component parameter sets; Calculate the upper and lower limits of the wheel rolling radius based on the wheel parameter set; The upper and lower limits of the first height difference are calculated based on the suspension parameter set; wherein, the first height difference is the height difference between the vertical coordinates of the wheel center and the preset point, and the preset point is the midpoint of the line connecting the center points of the upper mounting surfaces of the two shock absorbers corresponding to the front wheel; The upper and lower limits of the second height difference are calculated based on the set of sprung component parameters; wherein, the second height difference is the height difference between the vertical coordinates of the upper vehicle's center of gravity and the preset point; Using the extreme value method, based on the upper and lower limits of the wheel rolling radius, the upper and lower limits of the first height difference, and the upper and lower limits of the second height difference, the upper and lower limits of the center of gravity height of the vehicle R&D platform are calculated to determine the center of gravity height bandwidth of the vehicle R&D platform. Output the centroid height bandwidth of the automotive R&D platform.
[0007] The method provided by this invention constructs a multi-dimensional collaborative calculation model by integrating three core parameter groups: wheels, suspension, and sprung components. This reduces the limitations of single-parameter analysis and improves the accuracy of parameter coupling effects. The method calculates the centroid height bandwidth by arranging and combining parameter boundary values, making it more suitable for early platform development. While ensuring calculation accuracy, the method enables rapid verification of design boundaries through parametric modeling, effectively balancing platform development efficiency and design robustness.
[0008] In one possible implementation, there are multiple wheel parameter sets; each wheel parameter set includes parameters such as tire free diameter, rim radius, tire width, and aspect ratio; the calculation of the upper and lower limits of the wheel rolling radius based on the wheel parameter sets includes: Substituting the parameters of the wheel parameter set into the first formula, multiple wheel rolling radii are calculated; wherein, the first formula is: R = F*(r + D*γ) / (2π); In the formula, R represents the wheel rolling radius, F represents the calculation constant, r represents the wheel rim radius, D represents the tire width, and γ represents the aspect ratio; The calculated maximum value is determined as the upper limit of the wheel rolling radius, and the calculated minimum value is determined as the lower limit of the wheel rolling radius.
[0009] In one possible implementation, the number of suspension parameter groups is multiple; the parameters in each suspension parameter group include the height difference from the lower mounting point of the shock absorber to the wheel center, the suspension design length, the suspension stiffness coefficient, the suspension vertical angle, and the suspension load-bearing weight; the calculation of the upper and lower limits of the first height difference based on the suspension parameter groups includes: Substituting the parameters of the suspension parameter set into the second formula, multiple first height differences are calculated; wherein, the second formula is: ; In the formula, H represents the first height difference. 1-1 The height difference between the lower mounting point of the shock absorber and the wheel center is represented by L, the suspension design length is represented by K, the suspension stiffness coefficient is represented by θ, the vertical angle of the suspension is represented by W, and the load-bearing weight of the suspension is represented by W. The calculated maximum value is determined as the upper limit of the first height difference, and the calculated minimum value is determined as the lower limit of the first height difference.
[0010] In one possible implementation, the number of the sprung component parameter groups is N, where N is a positive integer and N > 1; each sprung component parameter group includes an upper limit and a lower limit of the sprung component weight, and a third height difference, where the third height difference is the height difference between the vertical coordinate of the sprung component's center of gravity and the preset point; the calculation of the upper and lower limits of the second height difference based on the sprung component parameter groups includes: For any of the aforementioned spring component parameter sets, calculate the product of the upper limit of the spring component weight and the third height difference to obtain a first product value, and calculate the product of the lower limit of the spring component weight and the third height difference to obtain a second product value. Select a product value from the first and second product values corresponding to each of the spring component parameter groups, and use it as the third product value to generate a first set. Then execute step 2. N Next, generate 2 N The first set; wherein the number of the third product values in the first set is the same as the number of the spring parameter groups, and any two third product values in the same first set come from different spring parameter groups; For any of the first sets, sum all the third product values in the first set to obtain a first sum value, and sum the upper or lower limit values of the weight of the spring component corresponding to all the third product values to obtain a second sum value. Calculate the ratio of the first sum value to the second sum value to obtain a first ratio. The maximum value among all the first ratios is determined as the upper limit of the second height difference, and the minimum value among all the first ratios is determined as the lower limit of the second height difference.
[0011] In one possible implementation, the sprung components include the seat, body frame, interior trim, powertrain, and air conditioning system.
[0012] In one possible implementation, calculating the upper and lower limits of the center of gravity height of the vehicle development platform using the extreme value method, based on the upper and lower limits of the wheel rolling radius, the upper and lower limits of the first height difference, and the upper and lower limits of the second height difference, to determine the center of gravity height bandwidth of the vehicle development platform includes: Substituting the upper limit of the wheel rolling radius, the upper limit of the first height difference, and the lower limit of the second height difference into the third formula, the upper limit of the center of gravity height is calculated; wherein, the third formula is: H max =R max +H 1-max -H 2-min ; In the formula, H max R represents the upper limit of the centroid height. max H represents the upper limit of the wheel's rolling radius. 1-max H represents the upper limit of the first height difference. 2-min This represents the lower limit of the second height difference; Substituting the lower limit of the wheel rolling radius, the lower limit of the first height difference, and the upper limit of the second height difference into the fourth formula, the lower limit of the center of gravity height is calculated; wherein, the fourth formula is: H min =R min +H 1-min -H 2-max ; In the formula, H min R represents the upper limit of the centroid height. min H represents the upper limit of the wheel's rolling radius. 1-min H represents the upper limit of the first height difference. 2-max This represents the lower limit of the second height difference.
[0013] In a second aspect, the present invention provides a centroid height bandwidth calculation device for an automotive R&D platform, the device comprising: The acquisition module is used to acquire target parameter sets for each compatible vehicle model, wherein the target parameter sets include wheel parameter sets, suspension parameter sets, and sprung component parameter sets; The wheel rolling radius calculation module is used to calculate the upper and lower limits of the wheel rolling radius based on the wheel parameter set. The first height difference calculation module is used to calculate the upper limit and lower limit of the first height difference based on the suspension parameter group; wherein, the first height difference is the height difference between the vertical coordinates of the wheel center and the preset point, and the preset point is the midpoint of the line connecting the center points of the upper mounting surfaces of the two shock absorbers corresponding to the front wheel; The second height difference calculation module is used to calculate the upper limit and lower limit of the second height difference based on the sprung component parameter set; wherein, the second height difference is the height difference between the vertical coordinate of the upper vehicle center of gravity and the preset point; The center of gravity height bandwidth calculation module is used to calculate the upper and lower limits of the center of gravity height of the automobile R&D platform using the extreme value method, based on the upper and lower limits of the wheel rolling radius, the upper and lower limits of the first height difference, and the upper and lower limits of the second height difference, so as to determine the center of gravity height bandwidth of the automobile R&D platform. The output module is used to output the centroid height bandwidth of the automotive R&D platform.
[0014] Thirdly, the present invention provides an electronic device, including a processor and a memory; the memory stores a computer program or computer instructions that can be loaded by the processor and executed as in the first aspect and any possible implementation thereof, of the centroid height bandwidth calculation method for an automotive R&D platform.
[0015] Fourthly, the present invention provides a computer-readable storage medium storing a computer program or computer instructions that can be loaded by a processor and executed as a method for calculating the centroid height bandwidth of an automotive R&D platform, as described in the first aspect and any possible implementation thereof.
[0016] Fifthly, the present invention provides a computer program product, including a computer program or computer instructions, wherein when the computer program or computer instructions are loaded and executed by a processor, the steps of the centroid height bandwidth calculation method for an automotive R&D platform as described in the first aspect and any possible implementation thereof are implemented.
[0017] For a detailed description of the second to fifth aspects and their various implementations in this invention, please refer to the detailed description in the first aspect and its various implementations; and for a detailed description of the beneficial effects of the second to fifth aspects and their various implementations, please refer to the beneficial effect analysis in the first aspect and its various implementations, which will not be repeated here. Attached Figure Description
[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a flowchart illustrating a method for calculating the centroid height bandwidth of an automotive R&D platform according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the first height difference, the second height difference, and the wheel rolling radius of the automotive R&D platform according to an embodiment of the present invention; Figure 3 This is a structural block diagram of a centroid height bandwidth calculation device for an automotive R&D platform according to an embodiment of the present invention; Figure 4 This is a block diagram of the internal structure of an electronic device according to an embodiment of the present invention. Detailed Implementation
[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.
[0020] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.
[0021] To facilitate understanding of the technical solution of this invention, the terminology involved in this invention will be briefly introduced below.
[0022] 1. Wheel center (also called wheel hub): refers to the central part of the wheel, usually a cylindrical metal part located at the center of the wheel. Its main function is to fix the wheel and enable it to rotate.
[0023] 2. Rolling Radius: This refers to the effective distance from the center of the wheel to the point of contact with the ground during vehicle movement. It reflects the actual geometric dimensions involved in the wheel's motion and serves as a crucial bridge connecting the wheel's physical dimensions with the vehicle's dynamics.
[0024] 3. Upper vehicle center of gravity: refers to the center of mass of the upper body of the vehicle (excluding the unsprung mass of wheels, suspension, etc., mainly including the body frame, driver's cab, passengers, luggage, and components such as the engine and transmission mounted on the main body structure).
[0025] 4. Wheel rim radius: This is an important geometric parameter of car wheel rims (also known as wheel hubs), referring to the distance from the center of the wheel rim to the edge of the wheel rim (usually the position of the bead seat where the wheel rim contacts the tire bead).
[0026] 5. Aspect Ratio (also known as aspect ratio): This is a key parameter in tire specifications, used to describe the ratio between the tire sidewall height and the tire section width, and has a direct impact on tire performance, vehicle handling, and comfort.
[0027] 6. Tire width: refers to the distance between the widest points on both sides of the tire after it is inflated.
[0028] 7. Suspension design length: refers to the effective working length of key components in the suspension system (such as control arms, linkages, etc.), which directly affects the suspension's travel and motion characteristics.
[0029] 8. Suspension stiffness coefficient: This is a parameter that measures the ability of a suspension system to resist deformation. It usually refers to the force required for the suspension spring to produce a unit deformation, and the unit is N / m.
[0030] 9. Suspension vertical angle: refers to the angle between the suspension components (such as shock absorbers, control arms, etc.) and the vertical direction.
[0031] 10. Suspension load capacity: refers to the maximum weight that the suspension system can bear, including the total weight of the vehicle body, passengers, cargo, etc.
[0032] This invention provides a method for calculating the centroid height bandwidth of an automotive R&D platform. The execution entity is an electronic device, including but not limited to smartphones, PCs, laptops, tablets, and servers. Please refer to... Figure 1 This is a flowchart illustrating the method for calculating the centroid height bandwidth of an automotive R&D platform provided in this embodiment of the invention. Figure 1 As shown, the method for calculating the centroid height bandwidth of the automotive R&D platform provided by this invention mainly includes the following steps (steps S101 to S106): Step S101: Obtain the target parameter group for each compatible vehicle model, wherein the target parameter group includes the wheel parameter group, suspension parameter group and sprung component parameter group; Step S102: Calculate the upper and lower limits of the wheel rolling radius based on the wheel parameter set; Step S103: Calculate the upper and lower limits of the first height difference based on the suspension parameter set; Step S104: Calculate the upper and lower limits of the second height difference based on the spring component parameter set; Step S105: Using the extreme value method, based on the upper and lower limits of the wheel rolling radius, the upper and lower limits of the first height difference, and the upper and lower limits of the second height difference, calculate the upper and lower limits of the center of gravity height of the vehicle R&D platform to determine the center of gravity height bandwidth of the vehicle R&D platform. Step S106: Output the centroid height bandwidth of the automotive R&D platform.
[0033] Figure 2 The positional relationship between the wheel rolling radius R, the first height difference H1, and the second height difference H2 is shown. For example... Figure 2As shown, the first height difference H1 is the height difference between the vertical coordinates of the wheel center Q and the preset point P, and the second height difference H2 is the height difference between the vertical coordinates of the upper vehicle center of gravity G1 and the preset point P. The preset point P is the midpoint of the line connecting the center points of the upper mounting surfaces of the two shock absorbers corresponding to the front wheel.
[0034] In this embodiment, there are multiple wheel parameter groups. The parameters in each wheel parameter group include the tire free diameter, rim radius, tire width, and aspect ratio.
[0035] In some optional embodiments, for calculating the upper and lower limits of the wheel rolling radius, the parameters of the wheel parameter set are first substituted into the first formula to calculate multiple wheel rolling radii; wherein, the first formula is: R = F*(r + D*γ) / (2π); In the formula, R represents the wheel rolling radius, F represents the calculation constant (3.05 for radial tires; 2.99 for bias tires), r represents the rim radius, D represents the tire width, and γ represents the aspect ratio; The maximum value obtained from the calculation is then determined as the upper limit of the wheel rolling radius, and the minimum value obtained from the calculation is determined as the lower limit of the wheel rolling radius.
[0036] The first formula can be derived from R=F*d / (2π) and d= r+D*γ, where d represents the free diameter of the tire (i.e. the diameter of the tire when it is not under load).
[0037] It should be noted that the same automotive R&D platform is compatible with multiple vehicle models, and therefore compatible with multiple wheel configurations and wheel models. This means that the calculation constant F, rim radius r, tire width D, and aspect ratio γ will all differ. These wheel parameters are divided into multiple wheel parameter groups, each corresponding to a specific tire model from a particular manufacturer. Substituting the wheel parameters from each group into the first formula mentioned above yields multiple wheel rolling radii. The maximum value is determined as the upper limit of the wheel rolling radius, and the minimum value is determined as the lower limit of the wheel rolling radius.
[0038] In this embodiment, there are multiple suspension parameter groups; the parameters in each suspension parameter group include the height difference from the lower mounting point of the shock absorber to the wheel center, the suspension design length, the suspension stiffness coefficient, the suspension vertical angle, and the suspension load-bearing weight.
[0039] In some optional embodiments, for calculating the upper and lower limits of the first height difference, the parameters of the suspension parameter group are first substituted into the second formula to calculate multiple first height differences; wherein, the second formula is: ; In the formula, H represents the first height difference. 1-1 The height difference between the lower mounting point of the shock absorber and the wheel center is represented by L, the suspension design length is represented by K, the suspension stiffness coefficient is represented by θ, the vertical angle of the suspension is represented by W, and the load-bearing weight of the suspension is represented by W. The calculated maximum value is then determined as the upper limit of the first height difference, and the calculated minimum value is determined as the lower limit of the first height difference.
[0040] It should be noted that differences in performance requirements between different models on the same platform, variations in weight and axle load across different configurations, and differences in actual vehicle tuning can all lead to variations in suspension stiffness, length, and angle. Therefore, these parameters are divided into multiple suspension parameter groups, with each group containing a set of suspension stiffness, length, and angle data. Substituting the parameters of each suspension parameter group into the second formula mentioned above yields multiple first height differences. The maximum value among these is determined as the upper limit of the first height difference, and the minimum value is determined as the lower limit of the first height difference.
[0041] In this embodiment, there are N parameter groups for the spring component, where N is a positive integer and N>1; the parameters in each parameter group for the spring component include the upper limit and lower limit of the weight of the spring component and the third height difference, which is the height difference between the vertical coordinate of the center of gravity of the spring component and the preset point P.
[0042] In some optional embodiments, for calculating the upper and lower limits of the second height difference, firstly, for any set of sprung component parameters, the product of the upper limit of the sprung component weight and the third height difference is calculated to obtain the first product value, and the product of the lower limit of the sprung component weight and the third height difference is calculated to obtain the second product value.
[0043] Then, select one product value from the first and second product values corresponding to each set of spring-loaded component parameters, and use it as the third product value to generate a first set. Then execute step 2. N Next, generate 2 N A first set; wherein the number of third product values in the first set is the same as the number of spring parameter groups, and any two third product values in the same first set come from different spring parameter groups.
[0044] For any first set, sum all the third product values in the first set to obtain the first sum value, and sum the upper or lower limit values of the spring weight corresponding to all the third product values to obtain the second sum value. Calculate the ratio of the first sum value to the second sum value to obtain the first ratio. Finally, the maximum value among all the first ratios is determined as the upper limit of the second height difference, and the minimum value among all the first ratios is determined as the lower limit of the second height difference.
[0045] In this embodiment, the sprung components include, but are not limited to, seats, body frames, interior trim, powertrain systems, and air conditioning systems. The calculation methods for the upper and lower limits of the second height difference are explained below using the three types of sprung components—seats, body frames, and interior trim—as examples (see Table 1).
[0046] Table 1. Parameter group of the spring
[0047] First, calculate the first and second product values for each set of sprung component parameters. For the seat, the first and second product values are A2h1 and A1h1, respectively; for the body frame, they are B2h2 and B1h2, respectively; and for the interior components, they are C2h3 and C1h3, respectively. Then, combine these six product values into three sets of three. Note that the three product values in each first set must come from different sets of sprung component parameters. This generates eight first sets: {A2h1, B2h2, C2h3}, {A2h1, B2h2, C1h3}, {A2h1, B1h2, C2h3}, {A2h1, B1h2, C1h3}, and {A1h1, B2h2, C2h3}. {A1h1, B2h2, C1h3}, {A1h1, B1h2, C2h3}, and {A2h1, B1h2, C1h3}.
[0048] Then, sum all the product values for each first set to obtain the first sum value. Next, sum the upper or lower limit of the spring component weight corresponding to all the product values for each first set to obtain the second sum value. Taking the first set {A2h1, B2h2, C2h3} as an example, the first sum value is A2h1 + B2h2 + C2h3, and the second sum value is A2 + B2 + C2. The ratio of the first sum value to the second sum value is then calculated, i.e., the first ratio is (A2h1 + B2h2 + C2h3) / (A2 + B2 + C2). Finally, sort all the first ratios of the first sets by size, determine the maximum value as the upper limit of the second height difference, and determine the minimum value as the lower limit of the second height difference.
[0049] In some optional embodiments, the upper limit of the center of gravity height is calculated by substituting the upper limit of the wheel rolling radius, the upper limit of the first height difference, and the lower limit of the second height difference into a third formula; wherein, the third formula is: H max =R max +H 1-max -H 2-min ; In the formula, H max R represents the upper limit of the centroid height.max H represents the upper limit of the wheel's rolling radius. 1-max H represents the upper limit of the first height difference. 2-min This represents the lower limit of the second height difference.
[0050] To calculate the lower limit of the center of gravity height, substitute the lower limit of the wheel rolling radius, the lower limit of the first height difference, and the upper limit of the second height difference into the fourth formula to obtain the lower limit of the center of gravity height; where the fourth formula is: H min =R min +H 1-min -H 2-max ; In the formula, H min R represents the upper limit of the centroid height. min H represents the upper limit of the wheel's rolling radius. 1-min H represents the upper limit of the first height difference. 2-max This represents the lower limit of the second height difference.
[0051] It should be noted that since the different states of wheel rolling radius R, first height difference H1, and second height difference H2 do not occur randomly, but appear on the whole vehicle according to the configuration combination, the dynamic and static statistical square tolerance calculation method is not suitable for calculating the upper and lower limit bandwidth of the center of gravity height. Only the extreme value method can be used to calculate it, and then obtain the whole vehicle weight center of gravity height bandwidth (Hmin, Hmax).
[0052] It should be noted that the parameter data in the wheel parameter group, suspension parameter group, and sprung component parameter group are all pre-set, that is, the corresponding parameters of the car that the car development platform is compatible with.
[0053] In this embodiment, the formula for calculating the boundary value of the wheel rolling radius reflects the dynamic changes under different loads / tire pressures. The boundary value of the first height difference can capture the range of suspension geometrical motion, and the boundary value of the second height difference can quantify the characteristics of sprung mass distribution. This hierarchical extreme value method is more consistent with actual operating condition fluctuations than static assumptions. By calculating the boundary values of each parameter separately and then integrating them using the extreme value method, the center of gravity height bandwidth can be obtained, which clearly defines the feasible range of center of gravity height. Designers can carry out subsequent work (such as chassis tuning and body layout) based on this range to ensure that the center of gravity height of all compatible models is within a safe and reasonable range, avoiding performance problems (such as decreased handling and increased rollover risk) caused by parameters exceeding the boundaries.
[0054] Based on the same inventive concept, embodiments of the present invention also provide a centroid height bandwidth calculation device for an automotive R&D platform for implementing the aforementioned method for calculating the centroid height bandwidth of an automotive R&D platform. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations of one or more embodiments of the centroid height bandwidth calculation device for an automotive R&D platform provided below can be found in the limitations of the centroid height bandwidth calculation method for an automotive R&D platform described above, and will not be repeated here.
[0055] Figure 3 A structural block diagram of a centroid height bandwidth computing device 300 for an automotive R&D platform is shown. Figure 3 As shown, the centroid height bandwidth computing device 300 of the automotive R&D platform includes: The acquisition module 301 is used to acquire the target parameter group for each compatible vehicle model, wherein the target parameter group includes the wheel parameter group, the suspension parameter group and the sprung component parameter group; The wheel rolling radius calculation module 302 is used to calculate the upper and lower limits of the wheel rolling radius based on the wheel parameter set. The first height difference calculation module 303 is used to calculate the upper limit and lower limit of the first height difference based on the suspension parameter group; wherein, the first height difference is the height difference between the vertical coordinates of the wheel center and the preset point, and the preset point is the midpoint of the line connecting the center points of the upper mounting surfaces of the two shock absorbers corresponding to the front wheel; The second height difference calculation module 304 is used to calculate the upper limit and lower limit of the second height difference based on the spring component parameter set; wherein, the second height difference is the height difference between the vertical coordinates of the upper vehicle center of gravity and the preset point; The center of gravity height bandwidth calculation module 305 is used to calculate the upper and lower limits of the center of gravity height of the automotive R&D platform using the extreme value method, based on the upper and lower limits of the wheel rolling radius, the upper and lower limits of the first height difference, and the upper and lower limits of the second height difference, so as to determine the center of gravity height bandwidth of the automotive R&D platform. Output module 306 is used to output the centroid height bandwidth of the automotive R&D platform.
[0056] In some optional embodiments, there are multiple wheel parameter groups; the parameters in each wheel parameter group include tire free diameter, rim radius, tire width and aspect ratio; the wheel rolling radius calculation module 302 is specifically used to substitute the parameters of the wheel parameter groups into the first formula to calculate multiple wheel rolling radii; the maximum value obtained is determined as the upper limit of the wheel rolling radius, and the minimum value obtained is determined as the lower limit of the wheel rolling radius.
[0057] The first formula is: R = F*(r + D*γ) / (2π); In the formula, R represents the wheel rolling radius, F represents the calculation constant, r represents the wheel rim radius, D represents the tire width, and γ represents the aspect ratio.
[0058] In some optional embodiments, there are multiple suspension parameter groups; the parameters in each suspension parameter group include the height difference from the lower mounting point of the shock absorber to the wheel center, the suspension design length, the suspension stiffness coefficient, the suspension vertical angle, and the suspension load-bearing weight; the first height difference calculation module 303 is specifically used to substitute the parameters of the suspension parameter group into the second formula to calculate multiple first height differences; the maximum value obtained by calculation is determined as the upper limit of the first height difference, and the minimum value obtained by calculation is determined as the lower limit of the first height difference.
[0059] The second formula is: ; In the formula, H represents the first height difference. 1-1 The height difference between the lower mounting point of the shock absorber and the wheel center is represented by L, the suspension design length is represented by K, the suspension stiffness coefficient is represented by θ, the vertical angle of the suspension is represented by W, and the load-bearing weight of the suspension is represented by W.
[0060] In some optional embodiments, the number of spring component parameter groups is N, where N is a positive integer and N>1; the parameters in each spring component parameter group include an upper limit and a lower limit of the spring component weight and a third height difference, the third height difference being the height difference between the vertical coordinates of the spring component's center of gravity and a preset point; the second height difference calculation module 304 is specifically used to calculate, for any spring component parameter group, the product of the upper limit of the spring component weight and the third height difference to obtain a first product value, and the product of the lower limit of the spring component weight and the third height difference to obtain a second product value; select one product value from the first product value and the second product value corresponding to each spring component parameter group as the third product value, generate a first set, and execute 2. N Next, generate 2 N There is a first set; wherein the number of third product values in the first set is the same as the number of sprung component parameter groups, and any two third product values in the same first set come from different sprung component parameter groups; for any first set, sum all the third product values in the first set to obtain a first sum value, and sum the upper or lower limit of the sprung component weight corresponding to all the third product values to obtain a second sum value, calculate the ratio of the first sum value to the second sum value to obtain a first ratio; the maximum value among all the first ratios is determined as the upper limit of the second height difference, and the minimum value among all the first ratios is determined as the lower limit of the second height difference.
[0061] In some alternative embodiments, the sprung components include seats, body frames, interior trim, powertrain, and air conditioning systems.
[0062] In some optional embodiments, the center of gravity height bandwidth calculation module 305 is specifically used to substitute the upper limit of the wheel rolling radius, the upper limit of the first height difference, and the lower limit of the second height difference into the third formula to calculate the upper limit of the center of gravity height; and to substitute the lower limit of the wheel rolling radius, the lower limit of the first height difference, and the upper limit of the second height difference into the fourth formula to calculate the lower limit of the center of gravity height.
[0063] The third formula is: H max =R max +H 1-max -H 2-min ; In the formula, H max R represents the upper limit of the centroid height. max H represents the upper limit of the wheel's rolling radius. 1-max H represents the upper limit of the first height difference. 2-min This represents the lower limit of the second height difference; The fourth formula is: H min =R min +H 1-min -H 2-max ; In the formula, H min R represents the upper limit of the centroid height. min H represents the upper limit of the wheel's rolling radius. 1-min H represents the upper limit of the first height difference. 2-max This represents the lower limit of the second height difference.
[0064] It should be noted that the above-mentioned functional modules can be integrated together to form an independent unit, such as integrated into a processing unit, or each module can exist physically separately, or two or more modules can be integrated to form an independent unit. The integrated unit can be implemented in hardware or as a software functional unit. If the function is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium.
[0065] Based on the same inventive concept, embodiments of the present invention also provide an electronic device 400. Figure 4 This is an internal structural diagram of an electronic device 400 provided in an embodiment of the present invention. Figure 4 As shown, the electronic device 400 includes a memory 401, a processor 402, and a communication bus 403; the memory 401 and the processor 402 are connected through the communication bus 403.
[0066] The memory 401 can be used to store instructions, programs, code, code sets, or instruction sets. The memory 401 may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for at least one function, and instructions for implementing the centroid height bandwidth calculation method for the automotive R&D platform provided in the above embodiments, etc. The data storage area may store data involved in the centroid height bandwidth calculation method for the automotive R&D platform provided in the above embodiments, etc.
[0067] Processor 402 may include one or more processing cores. Processor 402 executes instructions, programs, code sets, or instruction sets stored in memory 401, and calls data stored in memory 401 to perform various functions and process data according to the present invention. Processor 402 may be at least one of the following: Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), Central Processing Unit (CPU), Controller, Microcontroller, and Microprocessor. It is understood that for different devices, the electronic devices used to implement the above-described processor functions may also be other types, and the embodiments of the present invention do not specifically limit this.
[0068] The communication bus 403 may include a path for transmitting information between the aforementioned components. The communication bus 403 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The communication bus 403 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 The symbol is represented by only one double arrow, but this does not indicate that there is only one bus or one type of bus. Figure 4 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.
[0069] Those skilled in the art will understand that Figure 4The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the electronic device to which the present invention is applied. A specific electronic device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.
[0070] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0071] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0072] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0073] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0074] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.
[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.
Claims
1. A method for calculating the centroid height bandwidth of an automotive R&D platform, characterized in that, Obtain target parameter sets for each compatible vehicle model, wherein the target parameter sets include wheel parameter sets, suspension parameter sets, and sprung component parameter sets; Calculate the upper and lower limits of the wheel rolling radius based on the wheel parameter set; The upper and lower limits of the first height difference are calculated based on the suspension parameter set; wherein, the first height difference is the height difference between the vertical coordinates of the wheel center and the preset point, and the preset point is the midpoint of the line connecting the center points of the upper mounting surfaces of the two shock absorbers corresponding to the front wheel; The upper and lower limits of the second height difference are calculated based on the set of sprung component parameters; wherein, the second height difference is the height difference between the vertical coordinates of the upper vehicle's center of gravity and the preset point; Using the extreme value method, based on the upper and lower limits of the wheel rolling radius, the upper and lower limits of the first height difference, and the upper and lower limits of the second height difference, the upper and lower limits of the center of gravity height of the vehicle R&D platform are calculated to determine the center of gravity height bandwidth of the vehicle R&D platform. Output the centroid height bandwidth of the automotive R&D platform.
2. The method according to claim 1, characterized in that, The number of wheel parameter groups is multiple; each wheel parameter group includes parameters such as tire free diameter, rim radius, tire width, and aspect ratio; the calculation of the upper and lower limits of the wheel rolling radius based on the wheel parameter groups includes: Substituting the parameters of the wheel parameter set into the first formula, multiple wheel rolling radii are calculated; wherein, the first formula is: R = F*(r + D*γ) / (2π); In the formula, R represents the wheel rolling radius, F represents the calculation constant, r represents the wheel rim radius, D represents the tire width, and γ represents the aspect ratio; The calculated maximum value is determined as the upper limit of the wheel rolling radius, and the calculated minimum value is determined as the lower limit of the wheel rolling radius.
3. The method according to claim 1, characterized in that, The number of suspension parameter groups is multiple; the parameters in each suspension parameter group include the height difference from the lower mounting point of the shock absorber to the wheel center, the suspension design length, the suspension stiffness coefficient, the suspension vertical angle, and the suspension load-bearing weight; the calculation of the upper and lower limits of the first height difference based on the suspension parameter groups includes: Substituting the parameters of the suspension parameter set into the second formula, multiple first height differences are calculated; wherein, the second formula is: ； In the formula, H represents the first height difference. 1-1 The height difference between the lower mounting point of the shock absorber and the wheel center is represented by L, the suspension design length is represented by K, the suspension stiffness coefficient is represented by θ, the vertical angle of the suspension is represented by W, and the load-bearing weight of the suspension is represented by W. The calculated maximum value is determined as the upper limit of the first height difference, and the calculated minimum value is determined as the lower limit of the first height difference.
4. The method according to claim 1, characterized in that, The number of the spring component parameter groups is N, where N is a positive integer and N > 1; each spring component parameter group includes an upper limit and a lower limit of the spring component weight, and a third height difference, where the third height difference is the height difference between the vertical coordinate of the spring component's center of gravity and the preset point; the calculation of the upper limit and lower limit of the second height difference based on the spring component parameter groups includes: For any of the aforementioned spring component parameter sets, calculate the product of the upper limit of the spring component weight and the third height difference to obtain a first product value, and calculate the product of the lower limit of the spring component weight and the third height difference to obtain a second product value. Select a product value from the first and second product values corresponding to each of the spring component parameter groups, and use it as the third product value to generate a first set. Then execute step 2. N Next, generate 2 N The first set; wherein the number of the third product values in the first set is the same as the number of the spring parameter groups, and any two third product values in the same first set come from different spring parameter groups; For any of the first sets, sum all the third product values in the first set to obtain a first sum value, and sum the upper or lower limit values of the weight of the spring component corresponding to all the third product values to obtain a second sum value. Calculate the ratio of the first sum value to the second sum value to obtain a first ratio. The maximum value among all the first ratios is determined as the upper limit of the second height difference, and the minimum value among all the first ratios is determined as the lower limit of the second height difference.
5. The method according to claim 4, characterized in that, The sprung components include seats, body frame, interior parts, powertrain, and air conditioning system.
6. The method according to any one of claims 1 to 5, characterized in that, The step of calculating the upper and lower limits of the center of gravity height of the automotive R&D platform using the extreme value method, based on the upper and lower limits of the wheel rolling radius, the upper and lower limits of the first height difference, and the upper and lower limits of the second height difference, to determine the center of gravity height bandwidth of the automotive R&D platform includes: Substituting the upper limit of the wheel rolling radius, the upper limit of the first height difference, and the lower limit of the second height difference into the third formula, the upper limit of the center of gravity height is calculated; wherein, the third formula is: H max =R max +H 1-max -H 2-min ; In the formula, H max R represents the upper limit of the centroid height. max H represents the upper limit of the wheel's rolling radius. 1-max H represents the upper limit of the first height difference. 2-min This represents the lower limit of the second height difference; Substituting the lower limit of the wheel rolling radius, the lower limit of the first height difference, and the upper limit of the second height difference into the fourth formula, the lower limit of the center of gravity height is calculated; wherein, the fourth formula is: H min =R min +H 1-min -H 2-max ; In the formula, H min R represents the upper limit of the centroid height. min H represents the upper limit of the wheel's rolling radius. 1-min H represents the upper limit of the first height difference. 2-max This represents the lower limit of the second height difference.
7. A centroid height bandwidth calculation device for an automotive R&D platform, characterized in that, include: The acquisition module is used to acquire target parameter sets for each compatible vehicle model, wherein the target parameter sets include wheel parameter sets, suspension parameter sets, and sprung component parameter sets; The wheel rolling radius calculation module is used to calculate the upper and lower limits of the wheel rolling radius based on the wheel parameter set. The first height difference calculation module is used to calculate the upper limit and lower limit of the first height difference based on the suspension parameter group; wherein, the first height difference is the height difference between the vertical coordinates of the wheel center and the preset point, and the preset point is the midpoint of the line connecting the center points of the upper mounting surfaces of the two shock absorbers corresponding to the front wheel; The second height difference calculation module is used to calculate the upper limit and lower limit of the second height difference based on the sprung component parameter set; wherein, the second height difference is the height difference between the vertical coordinate of the upper vehicle center of gravity and the preset point; The center of gravity height bandwidth calculation module is used to calculate the upper and lower limits of the center of gravity height of the automobile R&D platform using the extreme value method, based on the upper and lower limits of the wheel rolling radius, the upper and lower limits of the first height difference, and the upper and lower limits of the second height difference, so as to determine the center of gravity height bandwidth of the automobile R&D platform. The output module is used to output the centroid height bandwidth of the automotive R&D platform.
8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the centroid height bandwidth calculation method for the automotive R&D platform as described in any one of claims 1 to 6.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the centroid height bandwidth calculation method of the automotive R&D platform according to any one of claims 1 to 6.
10. A computer program product, comprising a computer program or computer instructions, characterized in that, When the computer program or the computer instructions are loaded and executed by the processor, the steps of the centroid height bandwidth calculation method for the automotive R&D platform as described in any one of claims 1 to 6 are implemented.