Optimization design analysis system for tracked vehicle power assembly suspension
By designing the suspension optimization design analysis system of the powertrain of the tracked vehicle, and using expert scoring and hierarchical analysis methods to calculate the weight coefficient, the problem of difficult to evaluate and optimize the suspension system of the tracked vehicle in the existing technology is solved, and efficient design and vibration control are achieved.
Patent Information
- Application Number
- CN202411527043.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-03-21
AI Technical Summary
The prior art is difficult to effectively evaluate and optimize the modal frequency and decoupling rate of the powertrain suspension system of tracked vehicles in all directions, and the use requirements of MATLAB are relatively high, which limits the use of engineering and technicians.
A tracked vehicle powertrain suspension optimization design analysis system is designed, including expert scoring assignment module, natural frequency and decoupling rate calculation module, and optimization design module. The weight coefficient is calculated through multi-expert scoring and hierarchical analysis methods, and applied to optimization design goals, reducing the professional ability requirements of operators.
It improves design efficiency, simplifies the operation process, reduces repetitive work, realizes the optimized design of the powertrain suspension system, and effectively controls and slows down the vibration between the internal combustion engine and the frame.
Smart Images
Figure CN119670341A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of track vehicle dynamics characteristic simulation, and in particular to a track vehicle powertrain suspension optimization design and analysis system. Background Art
[0002] The powertrain suspension system is the power source of tracked vehicles and is usually composed of an engine, a generator, and a transmission. During operation, the powertrain suspension system will generate a lot of vibration and noise. In terms of the optimization design of the powertrain suspension, the contribution of the modal frequency and decoupling rate (energy distribution) in all directions is difficult to evaluate and needs to be given in combination with engineering practice. Therefore, with the help of Matlab's powerful computer-aided engineering, the system provides an expert scoring function, calculates the weights of the expert scoring results, and applies them to the optimization design goals of the tracked vehicle suspension system. This method effectively improves the accuracy of the suspension design target results, shortens the design cycle, and reduces repetitive work. However, the use of MATLAB requires certain professional theoretical formula derivation and code compilation capabilities, which limits the use of engineering and technical personnel. Summary of the invention
[0003] In view of this, the present invention proposes a tracked vehicle powertrain suspension optimization design and analysis system, which is easy to use, simple, easy to understand, and eliminates a lot of repetitive work content. It has strong versatility and relatively low requirements on the professional ability of operators, thereby greatly improving the design efficiency.
[0004] To achieve the above object, the technical solution of the present invention is:
[0005] A tracked vehicle powertrain suspension optimization design and analysis system, including an expert scoring and assignment module for each degree of freedom, a calculation module for natural frequency and decoupling rate, and an optimization design module;
[0006] Among them, the expert scoring and assignment module for each degree of freedom is used by multiple experts to perform weight calculations on each degree of freedom of the powertrain suspension; the calculation module for the natural frequency and decoupling rate is used to define parameters including the properties of the powertrain suspension mass, center of mass position, total number of suspension points, coordinate position of each suspension and installation angle, and calculates the natural frequency and decoupling rate of the tracked vehicle through the calculation function, and presents them visually; the optimization design module is used to optimize the natural frequency and decoupling rate of each degree of freedom of the tracked vehicle powertrain suspension system and the dynamic stiffness of the suspension.
[0007] Among them, in the expert scoring assignment module for each degree of freedom, the scoring standards are divided according to the degree of importance. Multiple experts input and score each degree of freedom of the powertrain suspension. A judgment matrix is built inside the module to judge the consistency matrix according to the scoring results of multiple experts; if the consistency judgment matrix is satisfied, the arithmetic mean method, geometric mean method and characteristic root method are used to calculate the average value of the three methods, and the weight value is output; if multiple experts do not satisfy the consistency judgment matrix, the expert score values that do not satisfy the consistent matrix are eliminated, and the optimization design objectives of each degree of freedom are weighted and embedded in the optimization design module.
[0008] The calculation module of the natural frequency and decoupling rate includes a powertrain parameter data frame, a suspension parameter data frame, a natural frequency and decoupling rate requirement data frame, and a calculation result data frame;
[0009] The powertrain parameters include mass, the center of mass position of each support along the vehicle coordinate system, inertia parameters, and the origin position of the engine coordinate system;
[0010] The suspension parameters include the total number of suspension points; the static stiffness of the rear suspension, left suspension and right suspension in three directions in the suspension local coordinate system; the dynamic-static ratio of each suspension in three different directions in the suspension local coordinate system; the angles between the elastic principal axes of the rear suspension, left suspension and right suspension and the vehicle coordinate system in three different directions; and the installation positions of the rear suspension, left suspension and right suspension in the vehicle coordinate system;
[0011] In the natural frequency and decoupling rate requirement data box, click the calculation function to calculate the natural frequency and decoupling rate of the suspension system;
[0012] In the calculation result data frame, click on data saving and data display to save the calculation data and display the results, thereby achieving a visual presentation of the analysis results.
[0013] Among them, the unit of mass is kg; the coordinates of the center of mass position X, center of mass position Y and center of mass position Z of each support along the vehicle coordinate system are in mm and are input at the center of mass position of the powertrain; the inertia parameter is the moment of inertia of the powertrain suspension system in the center of mass coordinate system, and is divided into IXX, IYY, IZZ, IXY, IYZ, IXZ in sequence according to the coupling method of the coordinate axes, and the unit is kg.m2; the origin position of the engine coordinate system is the coordinate in the vehicle coordinate system, and the unit is mm.
[0014] Among them, the static stiffness of the rear suspension, left suspension and right suspension in three directions in the local suspension coordinate system, the unit is kN / m; the angles between the elastic principal axes of the rear suspension, left suspension and right suspension and the vehicle coordinate system in three different directions, the unit is °; and the installation positions of the rear suspension, left suspension and right suspension in the vehicle coordinate system, the unit is mm.
[0015] Among them, the calculation module of the natural frequency and the decoupling rate has the function of saving data to a text file.
[0016] Among them, the optimization design module includes the natural frequency constraint range definition module of each degree of freedom, which is used to input the upper and lower limit values of the constraint, and its unit is HZ; the stiffness value range definition module of the rear suspension, left suspension, and right suspension in three degrees of freedom is used to input the upper or lower limit value of the stiffness, and its unit is k / m 3 ; and the initial value input module for stiffness design of rear suspension, left suspension and right suspension in three degrees of freedom.
[0017] Among them, the weight values of each degree of freedom of the suspension system calculated by multiple experts are obtained through the expert scoring and assignment module for each degree of freedom, and imported into the powertrain suspension optimization design target of the optimization design module. Click the one-click optimization button of the optimization design module to optimize the natural frequency and decoupling rate of the powertrain suspension system, and display the calculation results of the natural frequency and decoupling rate before and after optimization.
[0018] Beneficial effects:
[0019] 1. The system of the present invention includes an expert scoring and assigning module for each degree of freedom of a tracked powertrain suspension, a calculation module for the natural frequency and decoupling rate of a tracked vehicle powertrain suspension, and an optimization design module for a tracked vehicle powertrain suspension. The system evaluates the contribution of the decoupling rate and natural frequency of each degree of freedom of the powertrain suspension system, calculates the weight coefficients of the modal frequency and decoupling rate of each degree of freedom based on the evaluation content, and imports the results into the optimization design module for the tracked vehicle powertrain suspension.
[0020] 2. The system of the present invention runs under the Windows operating system, using MATLAB language and MATLAB AppDesigner as tools. Users only need to input the weight assignment of each degree of freedom by experts, as well as the parameters such as the powertrain suspension mass, center of mass position, coordinate position of each suspension and installation angle, and the system can analyze the dynamic characteristics with one click and present the analysis results in a visual way. By using the interface function of digital analysis MATLAB, the calculation process of modal frequency and decoupling rate is more convenient and portable, and optimization function is also provided, which provides reference for relevant scientific researchers when selecting and optimizing the relevant parameters of the powertrain suspension system.
[0021] 3. In the present invention, a multi-expert scoring system is introduced, and the weight coefficients of the modal frequency and decoupling rate contribution of each degree of freedom are calculated by the hierarchical analysis method, and these weight coefficients are included in the optimization target variables. In this way, the optimization target variables of the powertrain suspension are combined with engineering practice to more effectively control and mitigate the vibration between the internal combustion engine and the frame.
[0022] 4. The present invention uses MATLAB language and MATLAB appdesigner as tools under WINDOWS, combined with engineering practice, and invites relevant experts to evaluate the decoupling rate and contribution of the natural frequency of each degree of freedom of the powertrain suspension system. The system calculates the weight coefficients of the modal frequency and decoupling rate of each degree of freedom according to the evaluation content, and imports the results into the optimization design module of the tracked vehicle powertrain suspension. According to the definition parameters of the tracked vehicle powertrain suspension system, only the corresponding result parameters and the constraint range under the constraint module need to be modified to achieve the natural frequency and decoupling rate with one click and present the analysis results visually. The construction of this simulation system saves a lot of repetitive work content, introduces an expert scoring system, realizes the combination of powertrain suspension optimization design and engineering experience, and has relatively low requirements on the professional ability of operators, greatly improving the design efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 Schematic diagram of the tracked vehicle powertrain suspension optimization design and analysis system of the present invention.
[0024] Figure 2 Schematic diagram of the expert scoring and assignment module for each degree of freedom in the system of the present invention.
[0025] Figure 3 This is a schematic result diagram of the calculation module of the natural frequency and decoupling rate of the system embodiment of the present invention.
[0026] Figure 4 It is a schematic diagram of the optimization design module results of the system embodiment of the present invention.
[0027] Figure 5 Optimization design analysis system workflow diagram for the embodiment of the system of the present invention DETAILED DESCRIPTION
[0028] The present invention is described in detail below with reference to the accompanying drawings and embodiments.
[0029] The tracked vehicle powertrain suspension optimization design and analysis system of the present invention is as follows Figure 1 As shown, it includes an expert scoring module for each degree of freedom, a calculation module for the natural frequency and decoupling rate, and an optimization design module.
[0030] Among them, the schematic diagram of the expert scoring module for each degree of freedom is as follows Figure 2As shown, the assignment module is used for multiple experts to perform weight calculation on each degree of freedom of the powertrain suspension; further, according to the scores of multiple experts, normalization processing is performed to generate weight values of each degree of freedom of the powertrain suspension system; specifically, according to the engineering practice of tracked vehicles, multiple experts evaluate and score each degree of freedom of the powertrain suspension, establish a judgment matrix, and calculate the weight of the optimization design target of each degree of freedom of the tracked vehicle, so as to make the optimization target more in line with engineering practice.
[0031] Furthermore, each degree of freedom expert scoring module has a judgment standard, and the scoring standard is divided according to the degree of importance. Multiple experts input and score each degree of freedom of the powertrain suspension. A judgment matrix is built inside the module, and the consistency matrix is judged according to the scoring results of multiple experts; if the consistency judgment matrix is satisfied, the arithmetic mean method, geometric mean method and characteristic root method are used to calculate the average value of the three methods, and the weight value is output; if multiple experts do not satisfy the consistency judgment matrix, the expert score values that do not satisfy the consistent matrix are eliminated, and the optimization design objectives of each degree of freedom are weighted and embedded in the optimization design module.
[0032] The calculation module of the natural frequency and decoupling rate of the system of the present invention is used to define parameters including the properties of the powertrain suspension mass, the center of mass position, the total number of suspension points, the coordinate position of each suspension, and the installation angle. The calculation function is used to calculate the natural frequency and decoupling rate of the tracked vehicle and visualize the calculation. Specifically, according to the defined structural parameters of different powertrain suspension systems, the natural frequency and decoupling rate of the tracked vehicle powertrain suspension system are calculated and the results are visualized. In this embodiment, the schematic diagram of the calculation module of the natural frequency and decoupling rate is as follows: Figure 3 As shown, it includes a powertrain parameter data frame, a suspension parameter data frame, a natural frequency and decoupling rate requirement data frame, and a calculation result data frame.
[0033] The powertrain parameters include mass, the center of mass position of each support along the vehicle coordinate system, inertia parameters and the origin position of the engine coordinate system; the unit of mass is kg; the coordinates of the center of mass position X, center of mass position Y and center of mass position Z of each support along the vehicle coordinate system are in mm and are input at the center of mass position of the powertrain; the inertia parameter is the moment of inertia of the powertrain suspension system in the center of mass coordinate system, which is divided into I XX , I YY ,I ZZ ,I XY ,I YZ ,I XZ , the unit is kg.m 2 ; The origin position of the engine coordinate system is the coordinate in the vehicle coordinate system, and the unit is mm.
[0034] The suspension parameters include the total number of suspension points; the static stiffness of the rear suspension, left suspension and right suspension in three directions in the suspension local coordinate system, in kN / m; the dynamic-static ratio of each suspension in three different directions in the suspension local coordinate system; the angle between the elastic principal axis of the rear suspension, left suspension and right suspension and the vehicle coordinate system in three different directions, in degrees; and the installation position of the rear suspension, left suspension and right suspension in the vehicle coordinate system, in mm.
[0035] In the natural frequency and decoupling rate requirement data box, click the calculation function to calculate the natural frequency and decoupling rate of the suspension system.
[0036] In the calculation result data frame, click on data saving and data display to save the calculation data and display the results, thereby achieving a visual presentation of the analysis results.
[0037] In summary, the user can set the relevant parameters of the suspension system in the calculation module of the natural frequency and decoupling rate. After clicking the calculation function, the natural frequency and decoupling rate of the suspension system can be calculated, and the analysis results will be presented in a visual way. In addition, this module also has the function of saving data to a text file.
[0038] The optimization design module of the system of the present invention is used to optimize the natural frequency and decoupling rate of each degree of freedom of the tracked vehicle powertrain suspension system and the suspension dynamic stiffness. The optimization design module is as follows: Figure 4 As shown, it includes the natural frequency constraint range definition module of each degree of freedom, which is used to input the upper and lower limit values of the constraint, and its unit is HZ; the stiffness value range definition module of the rear suspension, left suspension, and right suspension in three degrees of freedom is used to input the upper or lower limit value of the stiffness, and its unit is k / m 3 ; and the input module of the initial value of the stiffness design of the rear suspension, left suspension, and right suspension in three degrees of freedom. The weight values of each degree of freedom of the suspension system calculated by multiple experts are obtained through the expert scoring and assignment module for each degree of freedom, and imported into the powertrain suspension optimization design target of the optimization design module. Clicking the one-click optimization button of the optimization design module can optimize the natural frequency and decoupling rate of the powertrain suspension system, and display the calculation results of the natural frequency and decoupling rate before and after optimization.
[0039] In summary, the operator can define the natural frequency constraint range of each degree of freedom in the optimization design module, and input the upper and lower limits of the constraint in Hertz (Hz). The operator can also define the stiffness value range of the rear suspension, left suspension and right suspension in three degrees of freedom, that is, input the upper or lower limit of the stiffness in kilonewtons per cubic meter (kN / m). The operator needs to input the initial stiffness values of the rear suspension, left suspension and right suspension in three degrees of freedom. These initial stiffness values will be combined with the weight values of each degree of freedom of the powertrain suspension system by multiple experts in claim 1 for the powertrain suspension optimization design objectives. After the operator clicks the one-key optimization button, the system will optimize the natural frequency and decoupling rate of the powertrain suspension system, and display the calculation results before and after the optimization.
[0040] In summary, the present invention proposes a tracked vehicle powertrain suspension optimization design and analysis system based on MATLAB App Designer. The system introduces a multi-expert scoring system, calculates the weight coefficients of the modal frequency and decoupling rate contribution of each degree of freedom through the hierarchical analysis method, and incorporates these weight coefficients into the optimization target variables. The optimization target variables of the powertrain suspension are combined with engineering practice to more effectively control and mitigate the vibration between the internal combustion engine and the frame. In addition, the system of the present invention utilizes the interface function of MATLAB, and the process of calculating the modal frequency and decoupling rate of the powertrain suspension system is more convenient and portable. The workflow of the tracked vehicle powertrain suspension optimization design and analysis system of the present invention is as follows: Figure 5 As shown, the optimization function of the system of the present invention provides a reference for relevant researchers when selecting and optimizing relevant parameters of the powertrain suspension system.
[0041] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A tracked vehicle powertrain suspension optimization design and analysis system, characterized in that: It includes expert scoring and assignment modules for each degree of freedom, calculation modules for natural frequency and decoupling rate, and optimization design modules; Among them, the expert scoring and assignment module for each degree of freedom is used by multiple experts to perform weight calculations on each degree of freedom of the powertrain suspension; the calculation module for the natural frequency and decoupling rate is used to define parameters including the properties of the powertrain suspension mass, center of mass position, total number of suspension points, coordinate position of each suspension and installation angle, and calculates the natural frequency and decoupling rate of the tracked vehicle through the calculation function, and presents them visually; the optimization design module is used to optimize the natural frequency and decoupling rate of each degree of freedom of the tracked vehicle powertrain suspension system and the dynamic stiffness of the suspension.
2. The system according to claim 1, characterized in that In the expert scoring assignment module for each degree of freedom, scoring standards are divided according to the degree of importance. Multiple experts input and score each degree of freedom of the powertrain suspension. A judgment matrix is built inside the module to judge the consistency matrix based on the scoring results of multiple experts; if the consistency judgment matrix is satisfied, the average value of the three methods, namely the arithmetic mean method, the geometric mean method and the characteristic root method, is calculated, and the weight value is output; if multiple experts do not satisfy the consistency judgment matrix, the expert score values that do not satisfy the consistent matrix are eliminated, and the optimization design objectives of each degree of freedom are weighted and embedded in the optimization design module.
3. The system according to claim 1 or 2, characterized in that: The calculation module of the natural frequency and decoupling rate includes a powertrain parameter data frame, a suspension parameter data frame, a natural frequency and decoupling rate requirement data frame and a calculation result data frame; The powertrain parameters include mass, the center of mass position of each support along the vehicle coordinate system, inertia parameters, and the origin position of the engine coordinate system; The suspension parameters include the total number of suspension points; the static stiffness of the rear suspension, left suspension and right suspension in three directions in the suspension local coordinate system; the dynamic-static ratio of each suspension in three different directions in the suspension local coordinate system; the angles between the elastic principal axes of the rear suspension, left suspension and right suspension and the vehicle coordinate system in three different directions; and the installation positions of the rear suspension, left suspension and right suspension in the vehicle coordinate system; In the natural frequency and decoupling rate requirement data box, click the calculation function to calculate the natural frequency and decoupling rate of the suspension system; In the calculation result data frame, click on data saving and data display to save the calculation data and display the results, thereby achieving a visual presentation of the analysis results.
4. The system according to claim 3, characterized in that The unit of mass is kg; the coordinates of the center of mass position X, center of mass position Y and center of mass position Z of each support along the vehicle coordinate system are in mm and are input at the center of mass position of the powertrain; the inertia parameter is the moment of inertia of the powertrain suspension system in the center of mass coordinate system, and is divided into IXX, IYY, IZZ, IXY, IYZ, IXZ in sequence according to the coupling method of the coordinate axes, and the unit is kg.m2; the origin position of the engine coordinate system is the coordinate in the vehicle coordinate system, and the unit is mm.
5. The system according to claim 4, characterized in that The static stiffness of the rear suspension, left suspension and right suspension in three directions in the local suspension coordinate system, the unit is kN / m; the angles between the elastic principal axes of the rear suspension, left suspension and right suspension and the vehicle coordinate system in three different directions, the unit is °; and the installation positions of the rear suspension, left suspension and right suspension in the vehicle coordinate system, the unit is mm.
6. The system according to claim 4 or 5, characterized in that The calculation module of the natural frequency and the decoupling rate has the function of saving data to a text file.
7. The system according to claim 4 or 5, characterized in that The optimization design module includes the natural frequency constraint range definition module for each degree of freedom, which is used to input the upper and lower limit values of the constraint, and its unit is HZ; the stiffness value range definition module of the rear suspension, left suspension, and right suspension in three degrees of freedom is used to input the upper or lower limit value of the stiffness, and its unit is k / m 3 ; and the initial value input module for stiffness design of rear suspension, left suspension and right suspension in three degrees of freedom.
8. The system according to claim 7, characterized in that The weight values of each degree of freedom of the suspension system calculated by multiple experts are obtained through the expert scoring and assignment module for each degree of freedom, and imported into the powertrain suspension optimization design target of the optimization design module. Click the one-click optimization button of the optimization design module to optimize the natural frequency and decoupling rate of the powertrain suspension system, and display the calculation results of the natural frequency and decoupling rate before and after optimization.