Method for calculating the center of mass position of vehicles, modified models, and platform models

Abstract

The present invention discloses a method for calculating the center of mass position of a vehicle, a modified vehicle model, and a platform vehicle model. The method for calculating the center of mass position of the vehicle includes obtaining the mass of each component of the vehicle, wherein the components include parts, loads, and equipment; obtaining the center of mass coordinates of each component of the vehicle in the vehicle design digital model coordinate system; and calculating the center of mass coordinates of the vehicle based on the mass and center of mass coordinates of each component of the vehicle. By treating each component of the vehicle as a mass point on the center of mass of the component, the solution to the center of mass of the vehicle is converted into a problem of solving the center of mass of a mass point system in three-dimensional space. In the vehicle design digital model coordinate system, each component, including parts, loads, and equipment, is designed and in a known state, and thus the center of mass position of the vehicle can be accurately calculated, providing a reliable basis for the planning and formulation of performance targets in the early stage of vehicle project development, and improving the confidence of the simulation results.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a method for calculating the center of mass position of a vehicle, a modified vehicle model, and a platform vehicle model. Background Art

[0002] As the automobile market gradually matures, competition among automobile manufacturers is becoming increasingly fierce. In order to ensure advantages in product competition and seize market opportunities, manufacturers continue to launch new models or iterative models, and the development cycle has been further shortened. Although the development cycle has been further compressed, product performance must be guaranteed, otherwise it will be difficult to gain a foothold in today's increasingly mature user market.

[0003] During the automobile development process, the performance of the entire vehicle must be planned, analyzed and verified in advance. CAE (Computer Aided Engineering) simulation is a relatively effective analysis method currently used in the industry.

[0004] The location of a vehicle's center of mass is a key factor in overall vehicle performance. It's closely related to multiple performance dimensions, including handling, stability, braking, and power, making it a crucial parameter that must be considered during vehicle development. Furthermore, it's a necessary input parameter for CAE simulations of various performance dimensions, including handling, braking, and crash safety. Its accuracy directly impacts the confidence level of CAE simulation results. Therefore, the accuracy of the vehicle's center of mass directly impacts the accuracy of CAE simulation results and the consistency between the actual performance level of a vehicle after mass production and the performance targets planned during the development phase. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for calculating the center of mass position of vehicles, modified models and platform models, so as to make the calculation accuracy of the center of mass position of the whole vehicle higher, improve the confidence of CAE simulation results, and ensure the reliable performance of new vehicle development.

[0006] In order to solve the above technical problems, a method for calculating the center of mass position of a vehicle of the present invention comprises the following steps:

[0007] Step A1: Obtain the mass of each component of the vehicle, where the components include parts, loads, and equipment;

[0008] Step A2: obtaining the center of mass coordinates of each component of the vehicle in the vehicle design digital model coordinate system;

[0009] Step A3: Calculate the center of mass coordinates of the vehicle based on the mass and center of mass coordinates of each component of the vehicle.

[0010] In the above-mentioned method for calculating the center of mass position of the vehicle, by regarding each component of the vehicle as a point mass located at the center of mass of the component, the solution to the center of mass of the vehicle is converted into the problem of solving the center of mass of a system of point masses in three-dimensional space. In the design digital model coordinate system of the vehicle, each component, including parts, loads and equipment, is designed and in a known state, so the center of mass position of the vehicle can be accurately calculated, providing a reliable basis for the planning and formulation of performance goals in the early stage of vehicle project development, and providing accurate parameter input for CAE simulation of performance dimensions, which can greatly improve the confidence of the simulation results.

[0011] The vehicle design digital model coordinate system refers to the coordinate system used to construct the vehicle digital model in computer design software during the design phase of the vehicle development process.

[0012] As an improvement to the method for calculating the center of mass position of a vehicle of the present invention, in step A3, calculating the center of mass coordinates of the vehicle includes:

[0013] Step A31: Calculating the total mass of the vehicle according to the mass of each component of the vehicle;

[0014] Step A32: Based on the coordinates of the center of mass of each vehicle component, orthographically project the center of mass of each vehicle component onto the X-axis of the vehicle design digital model coordinate system, and assign the mass of each vehicle component to its corresponding projection point;

[0015] Step A33: Calculate the total static moment of all the projection points about the Y-axis or Z-axis of the vehicle design digital model coordinate system, wherein the static moments of the projection points located on the positive half of the X-axis are all positive, and the static moments of the projection points located on the negative half of the X-axis are all negative. Preferably, the calculation method used includes: multiplying the mass of each component of the vehicle by the coordinate of its center of mass in the X-axis direction and then accumulating the result;

[0016] Step A34: Calculate the coordinate of the center of mass of the vehicle on the X-axis of the vehicle design numerical model coordinate system based on the total mass and total static moment of the vehicle. Preferably, the calculation method adopted includes: calculating the quotient of the total static moment of the vehicle and the total mass of the vehicle.

[0017] The definition of static moment is as follows: if the distance between a particle with mass m and a certain axis L is l, then the static moment M of the particle about the axis L is: M(L) = m×l.

[0018] In the three-dimensional space mass point system representing all vehicle components, all mass points are projected onto the X-axis. Then, in the one-dimensional direction of the X-axis, the X-coordinate of the vehicle's center of mass can be accurately solved. The same algorithm can be used to calculate the Y and Z coordinates of the vehicle's center of mass on the Y and Z axes respectively, thereby achieving a fast and accurate solution to the center of mass position.

[0019] As another improvement to the method for calculating the center of mass position of a vehicle of the present invention, the step A3 is specifically as follows:

[0020] The total mass of the vehicle is M A The center of mass coordinates of the vehicle in the vehicle design digital model coordinate system is (X A , Y A , Z A ), the mass of the i-th component of the vehicle is m Ai , i = 1, 2, ... n, n represents the number of the vehicle components, the centroid coordinates of the i-th component of the vehicle in the vehicle design numerical model coordinate system are (x Ai ,y Ai , z Ai ), then the total mass and center of mass coordinates of the vehicle satisfy the mathematical equation:

[0021]

[0022]

[0023]

[0024]

[0025] In order to solve the above technical problems, the present invention provides a method for calculating the center of mass position of a modified vehicle model, comprising the following steps:

[0026] Step B1: Calculate the coordinates of the center of mass of the base vehicle in the base vehicle design digital-analog coordinate system using the above-mentioned method for calculating the center of mass of the vehicle, and obtain the total mass of the base vehicle;

[0027] Step B2: confirming the components added and removed from the modified model relative to the base model, and obtaining the mass and center of mass coordinates of the added and removed components;

[0028] Step B3: Calculate the center of mass coordinates of the modified model based on the center of mass coordinates and total mass of the basic model, and the mass and center of mass coordinates of the added components and the removed components.

[0029] A modified model refers to an improved design or iterative upgrade design based on an existing basic model. Usually, the interior and exterior decoration, configuration or powertrain and chassis system are adaptively changed without changing the white body.

[0030] The basic vehicle model design digital model coordinate system refers to the coordinate system used to construct its digital model in computer design software during the design stage of the basic vehicle model development process.

[0031] As an improvement to the method for calculating the center of mass position of a modified vehicle model of the present invention, step B3 includes:

[0032] Step B31: Calculating the total mass of the modified vehicle model based on the total mass of the base vehicle model, the mass of the added components, and the mass of the removed components. Preferably, the calculation method employed includes: adding the mass of the added components to the total mass of the base vehicle model and subtracting the mass of the removed components.

[0033] Step B32: Calculate the Y-axis or Z-axis static moment of the base vehicle after the base vehicle's center of mass is projected onto the X-axis of the base vehicle's design digital model coordinate system based on the base vehicle's center of mass coordinate and the total mass. Preferably, the calculation method employed includes: multiplying the total mass of the base vehicle's center of mass's X-axis coordinate.

[0034] Step B33: Calculate the first total static moment of the added components on the Y-axis or Z-axis after the center of mass of all the added components is projected onto the X-axis of the basic vehicle model design digital model coordinate system based on the mass and center of mass coordinates of the added components. Preferably, the calculation method adopted includes: multiplying the mass of each added component by the coordinate of its center of mass in the X-axis direction and then accumulating the result.

[0035] Step B34: Calculate the total static moment of the removed components on the Y-axis or Z-axis after the center of mass of all the removed components is projected onto the X-axis of the basic vehicle model design digital model coordinate system based on the mass and center of mass coordinates of the removed components. Preferably, the calculation method adopted includes: multiplying the mass of each removed component by the coordinate of its center of mass in the X-axis direction and then accumulating the result.

[0036] Step B35: Calculate the orthographic projection of the center of mass of the modified vehicle onto the X-axis of the design digital-analog coordinate system of the basic vehicle based on the static moment of the basic vehicle, the first increased total static moment, and the removed total static moment. For the static moment of the modified vehicle on the Y-axis or Z-axis, preferably, the calculation method adopted includes: adding the first increased total static moment to the static moment of the basic vehicle and subtracting the removed total static moment;

[0037] Step B36: Calculate the coordinate of the modified model on the X-axis of the basic model design digital-analog coordinate system based on the static moment of the modified model and the total mass of the modified model. Preferably, the calculation method adopted includes: calculating the quotient of the static moment of the modified model and the total mass of the modified model.

[0038] Using a similar algorithm, the Y-axis and Z-axis coordinates of the modified model in the basic model design digital model coordinate system can be calculated in sequence, so as to quickly and accurately obtain the center of mass coordinates of the modified model through the existing known mass and center of mass coordinate information of the basic model.

[0039] As another improvement to the method for calculating the center of mass position of a modified vehicle model of the present invention, the step B3 is specifically as follows:

[0040] The total mass of the basic vehicle model is M O The center of mass coordinates (X O , Y O , Z O ),

[0041] The centroid coordinates of the modified model in the basic model design digital model coordinate system are (X B , Y B , Z B ),

[0042] The mass of the kth component added to the modified model relative to the basic model is m Bk , k = 1, 2, ... p, p represents the number of the added components, and the centroid coordinates of the kth added component in the basic vehicle model design digital model coordinate system are (x Bk ,y Bk , z Bk ),

[0043] The mass of the jth component removed from the modified model relative to the basic model is m Bj , j = 1, 2, ... q, q represents the number of components removed, and the centroid coordinates of the jth component removed in the basic vehicle model design digital model coordinate system are (x Bj ,y Bj , z Bj ),but

[0044]

[0045]

[0046]

[0047] In order to solve the above technical problems, the present invention provides a method for calculating the center of mass position of a platform vehicle, comprising the following steps:

[0048] Step C1: using the above-mentioned method for calculating the center of mass position of the vehicle, calculate the center of mass coordinates of the basic platform in the basic platform design digital model coordinate system, and obtain the total mass of the basic platform;

[0049] Step C2: confirming the components added to the platform vehicle model relative to the basic platform, and obtaining the mass and center of mass coordinates of the added components;

[0050] Step C3: Calculate the center of mass coordinates of the platform vehicle model based on the center of mass coordinates and total mass of the basic platform, and the mass and center of mass coordinates of the added components.

[0051] As an improvement to the method for calculating the center of mass position of a platform vehicle model of the present invention, step C3 includes:

[0052] Step C31: Calculating the total mass of the platform vehicle model according to the total mass of the basic platform and the mass of the added components;

[0053] Step C32: Calculate the static moment of the base platform on the Y-axis or Z-axis when the center of mass of the base platform is projected onto the X-axis of the design digital model coordinate system of the base platform according to the coordinates of the center of mass of the base platform and the total mass;

[0054] Step C33: Calculate the second total static moment of the added components on the Y-axis or Z-axis by projecting the center of mass of all the added components onto the X-axis of the basic platform design digital model coordinate system based on the mass and center of mass coordinates of the added components;

[0055] Step C34: Calculate the platform vehicle static moment on the Y-axis or Z-axis when the center of mass of the platform vehicle is projected onto the X-axis of the basic platform design digital model coordinate system based on the basic platform static moment and the second increased total static moment;

[0056] Step C36: Calculate the coordinate of the platform vehicle on the X-axis of the basic platform design digital-analog coordinate system based on the static moment of the platform vehicle and the total mass of the platform vehicle. Preferably, the calculation method adopted includes: calculating the quotient of the static moment of the platform vehicle and the total mass of the platform vehicle.

[0057] As another improvement to the method for calculating the center of mass position of the platform vehicle of the present invention, the step C3 is specifically as follows:

[0058] The total mass of the base platform is M D The center of mass coordinates of the basic platform in the basic platform design digital model coordinate system (X D , Y D , Z D ),

[0059] The total mass of the platform vehicle is M C The center of mass coordinates (X C , Y C , Z C ),

[0060] The mass of the wth component added to the platform vehicle model relative to the basic platform is m Cw, w=1, 2, ... u, u represents the number of components to be added, and the centroid coordinates of the wth component added in the basic platform design numerical model coordinate system are (x Cw ,y Cw , z Cw ),but

[0061]

[0062]

[0063]

[0064] A platform vehicle is a basic vehicle composed of common components across a series of models. Using the same or similar component systems, structures, manufacturing processes, and industrial facilities, it can be used to create models with varying appearances, sizes, functions, and performance. Platform vehicle development can increase component commonality, thereby reducing vehicle development cycles and costs.

[0065] A platform vehicle model is a vehicle model produced on a basic platform. The basic platform design digital model coordinate system refers to the coordinate system used to construct its digital model in computer design software during the design phase of the basic platform development process.

[0066] In summary, the above-mentioned method for calculating the center of mass position of vehicles, modified models and platform models can achieve high accuracy in calculating the center of mass position of the entire vehicle, improve the confidence level of CAE simulation results, ensure the reliable performance of new vehicle development, and is suitable for the development of new models, modified models, and platform-based models, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In the attached figure:

[0068] Figure 1 Schematic diagram of the method for calculating the center of mass position of a vehicle according to the present invention. DETAILED DESCRIPTION

[0069] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0070] Example 1

[0071] It should be noted that: vehicle components are the components that make up the vehicle, including parts, loads and equipment. Parts are the parts, modules and systems that make up the entire vehicle; loads refer to luggage and passengers; equipment refers to spare tires, tools, etc. In addition, components also include added oil and water. Therefore, during the design analysis, the vehicle has three states: ready, designed and fully loaded. The corresponding curb weight refers to the weight of the entire vehicle with all equipment (including on-board tools, spare tires, etc.), full of fuel and water, but no cargo or passengers; fully loaded weight refers to the weight when the vehicle is fully loaded with passengers (including the driver) and cargo as required on the basis of the curb weight; design weight refers to the weight after adding the set passengers and cargo on the basis of the curb weight. The center of mass position calculation method of the vehicle, modified model and platform model of the present invention can be used to calculate the center of mass position coordinates of the corresponding vehicle in these three states.

[0072] like Figure 1 As shown, the present invention provides a method for calculating the center of mass position of a vehicle, comprising the following steps:

[0073] Step A1: Obtain the mass of each component of the vehicle, where the components include parts, loads, and equipment;

[0074] Step A2: obtaining the center of mass coordinates of each component of the vehicle in the vehicle design digital model coordinate system;

[0075] Step A3: Calculate the center of mass coordinates of the vehicle based on the mass and center of mass coordinates of each component of the vehicle.

[0076] When used, the specific process includes the following three development scenarios:

[0077] 1. For newly developed models

[0078] First, determine the mass of each component of the vehicle, including the mass of each part / load / equipment, etc.

[0079] Then, determine the center of mass coordinates of each vehicle component in the vehicle design digital model coordinate system, including the center of mass coordinates of each component / load / equipment, etc.

[0080] Note: The placement of loads and equipment is the set position during design. For example, luggage should be placed in the corresponding position, and the human-machine layout of the vehicle is determined.

[0081] Finally, the coordinate value of the vehicle's center of mass in the vehicle design digital model coordinate system is calculated according to the following formula:

[0082] Assume the total mass of the vehicle is M A The center of mass coordinates of the vehicle in the vehicle design digital model coordinate system is (X A , Y A , Z A), the mass of the i-th component of the vehicle is m Ai , i = 1, 2, ... n, n represents the number of the vehicle components, the centroid coordinates of the i-th component of the vehicle in the vehicle design numerical model coordinate system are (x Ai ,y Ai , z Ai ), then the total mass and center of mass coordinates of the vehicle satisfy the mathematical equation:

[0083]

[0084]

[0085]

[0086]

[0087] 2. For modified models

[0088] First, in the basic vehicle model design digital model coordinate system, the center of mass coordinates of the basic vehicle model are determined, and the total mass of each component of the basic vehicle model is obtained.

[0089] Then, identify the components that are replaced on the base model in the modified model.

[0090] Next, determine the mass of all added components and their center of mass coordinates in the basic vehicle model design numerical model coordinate system; as well as the mass of removed components and their center of mass coordinates in the basic vehicle model design numerical model coordinate system.

[0091] Finally, calculate the coordinate value of the modified model in the basic model design digital model coordinate system according to the following formula:

[0092] The total mass of the basic vehicle model is M O The center of mass coordinates (X O , Y O , Z O ),

[0093] The centroid coordinates of the modified model in the basic model design digital model coordinate system are (X B , Y B , Z B ),

[0094] The mass of the kth component added to the modified model relative to the basic model is m Bk , k = 1, 2, ... p, p represents the number of the added components, and the centroid coordinates of the kth added component in the basic vehicle model design digital model coordinate system are (x Bk ,y Bk , z Bk ),

[0095] The mass of the jth component removed from the modified model relative to the basic model is m Bj , j = 1, 2, ... q, q represents the number of components removed, and the centroid coordinates of the jth component removed in the basic vehicle model design digital model coordinate system are (x Bj ,y Bj , z Bj ),but

[0096]

[0097]

[0098]

[0099] 3. Determine the center of mass of the vehicle when developing a vehicle model on a basic platform

[0100] First, in the basic platform design digital model coordinate system, determine the center of mass coordinates and total mass of the basic platform.

[0101] Then, determine the mass of all components added to the platform vehicle model on the basis of the basic platform and the center of mass coordinates in the basic platform design digital model coordinate system.

[0102] Finally, calculate the center of mass coordinates of the platform vehicle in the basic platform design digital model coordinate system according to the following formula:

[0103] The total mass of the base platform is M D The center of mass coordinates of the basic platform in the basic platform design digital model coordinate system (X D , Y D , Z D ),

[0104] The total mass of the platform vehicle is M C The center of mass coordinates (X C , Y C , Z C ),

[0105] The mass of the wth component added to the platform vehicle model relative to the basic platform is m Cw , w=1, 2, ... u, u represents the number of components to be added, and the centroid coordinates of the wth component added in the basic platform design numerical model coordinate system are (x Cw ,y Cw , z Cw ),but

[0106]

[0107]

[0108]

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art may still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims of the invention.

Claims

1. A method for calculating the center of mass position of a modified vehicle based on a method for calculating the center of mass position of a vehicle, characterized in that: The method for calculating the center of mass position of the vehicle comprises the following steps: Step A1: Obtain the mass of each component of the vehicle, where the components include parts, loads, and equipment; Step A2: obtaining the center of mass coordinates of each component of the vehicle in the vehicle design digital model coordinate system; Step A3: Calculating the center of mass coordinates of the vehicle based on the mass and center of mass coordinates of each component of the vehicle; In step A3, calculating the center of mass coordinates of the vehicle includes: Step A31: Calculating the total mass of the vehicle according to the mass of each component of the vehicle; Step A32: Based on the coordinates of the center of mass of each vehicle component, orthographically project the center of mass of each vehicle component onto the X-axis of the vehicle design digital model coordinate system, and assign the mass of each vehicle component to its corresponding projection point; Step A33: Calculate the total static moment of all the projection points on the Y axis or Z axis of the vehicle design digital model coordinate system, wherein the static moments of the projection points located on the positive half axis of the X axis are all positive values, and the static moments of the projection points located on the negative half axis of the X axis are all negative values; Step A34: Calculating the coordinate of the center of mass of the vehicle on the X-axis of the vehicle design digital model coordinate system based on the total mass and total static moment of the vehicle; The method for calculating the center of mass position of the modified vehicle model includes the following steps: Step B1: using the vehicle center of mass position calculation method, calculate the center of mass coordinates of the basic vehicle model in the basic vehicle model design digital model coordinate system, and obtain the total mass of the basic vehicle model; Step B2: confirming the components added and removed from the modified model relative to the base model, and obtaining the mass and center of mass coordinates of the added and removed components; Step B3: Calculate the center of mass coordinates of the modified model based on the center of mass coordinates and total mass of the basic model, and the mass and center of mass coordinates of the added components and the removed components.

2. The method for calculating the center of mass position of a modified vehicle according to claim 1, characterized in that: The calculation method used in step A34 includes calculating the quotient of the total static moment of the vehicle and the total mass of the vehicle.

3. The method for calculating the center of mass position of a modified vehicle according to claim 1, characterized in that: The calculation method used in step A33 includes: multiplying the mass of each component of the vehicle by the coordinate of the center of mass in the X-axis direction and then accumulating the results.

4. The method for calculating the center of mass position of a modified vehicle according to claim 1, characterized in that: Step B3 includes: Step B31: Calculating the total mass of the modified model based on the total mass of the base model, the mass of the added components, and the mass of the removed components; Step B32: Calculate the static moment of the basic vehicle model on the Y-axis or Z-axis after the center of mass of the basic vehicle model is projected onto the X-axis of the basic vehicle model design digital model coordinate system based on the center of mass coordinates and the total mass of the basic vehicle model; Step B33: Calculate the first total static moment of the added components on the Y-axis or Z-axis after the center of mass of all the added components is projected onto the X-axis of the basic vehicle model design digital model coordinate system based on the mass and center of mass coordinates of the added components; Step B34: Calculate the total static moment of the removed components on the Y-axis or Z-axis after the center of mass of all the removed components is projected onto the X-axis of the basic vehicle model design digital model coordinate system based on the mass and center of mass coordinates of the removed components; Step B35: Calculate the modified model's static moment on the Y-axis or Z-axis, based on the base model's static moment, the first added total static moment, and the removed total static moment, by projecting the center of mass of the modified model onto the X-axis of the base model's design numerical coordinate system. Step B36: Calculate the X-axis coordinate of the modified model on the basic model design digital-analog coordinate system based on the static moment of the modified model and the total mass of the modified model.

5. The method for calculating the center of mass position of a modified vehicle according to claim 4, characterized in that: The calculation method used in step B36 includes: calculating the quotient of the static moment of the modified model and the total mass of the modified model.

6. A method for calculating the center of mass position of a platform vehicle based on a method for calculating the center of mass position of a vehicle, characterized in that: The method for calculating the center of mass position of the vehicle comprises the following steps: Step A1: Obtain the mass of each component of the vehicle, where the components include parts, loads, and equipment; Step A2: obtaining the center of mass coordinates of each component of the vehicle in the vehicle design digital model coordinate system; Step A3: Calculating the center of mass coordinates of the vehicle based on the mass and center of mass coordinates of each component of the vehicle; In step A3, calculating the center of mass coordinates of the vehicle includes: Step A31: Calculating the total mass of the vehicle according to the mass of each component of the vehicle; Step A32: Based on the coordinates of the center of mass of each vehicle component, orthographically project the center of mass of each vehicle component onto the X-axis of the vehicle design digital model coordinate system, and assign the mass of each vehicle component to its corresponding projection point; Step A33: Calculate the total static moment of all the projection points on the Y axis or Z axis of the vehicle design digital model coordinate system, wherein the static moments of the projection points located on the positive half axis of the X axis are all positive values, and the static moments of the projection points located on the negative half axis of the X axis are all negative values; Step A34: Calculating the coordinate of the center of mass of the vehicle on the X-axis of the vehicle design digital model coordinate system based on the total mass and total static moment of the vehicle; The method for calculating the center of mass position of the platform vehicle type comprises the following steps: Step C1: using the method for calculating the center of mass position of a vehicle according to any one of claims 2 to 4, calculating the center of mass coordinates of the base platform in the base platform design digital model coordinate system, and obtaining the total mass of the base platform; Step C2: confirming the components added to the platform vehicle model relative to the basic platform, and obtaining the mass and center of mass coordinates of the added components; Step C3: Calculate the center of mass coordinates of the platform vehicle model based on the center of mass coordinates and total mass of the basic platform, and the mass and center of mass coordinates of the added components.

7. The method for calculating the center of mass position of a platform vehicle according to claim 6, characterized in that: The step C3 comprises: Step C31: Calculating the total mass of the platform vehicle model according to the total mass of the basic platform and the mass of the added components; Step C32: Calculate the static moment of the base platform on the Y-axis or Z-axis when the center of mass of the base platform is projected onto the X-axis of the design digital model coordinate system of the base platform according to the coordinates of the center of mass of the base platform and the total mass; Step C33: Calculate the second total static moment of the added components on the Y-axis or Z-axis by projecting the center of mass of all the added components onto the X-axis of the basic platform design digital model coordinate system based on the mass and center of mass coordinates of the added components; Step C34: Calculate the platform vehicle static moment on the Y-axis or Z-axis when the center of mass of the platform vehicle is projected onto the X-axis of the basic platform design digital model coordinate system based on the basic platform static moment and the second increased total static moment; Step C36: Calculate the X-axis coordinate of the platform vehicle model in the basic platform design digital-analog coordinate system according to the static moment of the platform vehicle model and the total mass of the platform vehicle model.

8. The method for calculating the center of mass position of a platform vehicle according to claim 7, characterized in that: The calculation method used in step C36 includes: calculating the quotient of the static moment of the platform vehicle model and the total mass of the platform vehicle model.

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