Hybrid power system engine assembly transient condition NVH simulation method and storage medium

Abstract

The invention relates to a transient working condition NVH simulation method for a hybrid power system engine assembly and a storage medium. The method comprises the steps that hybrid power system engine starting working condition dynamic modeling is carried out; building a simulink starting cylinder pressure control model and a generator torque control model; carrying out kinetic analysis solution, and calculating an excitation load of a key position; result analysis and parameter optimization are carried out. Noise prediction can be carried out according to a component surface vibration response result; carrying out optimization design on key parts of the parts; according to the hybrid power system engine starting condition dynamic modeling method combined with simulink joint simulation, parameter analysis and evaluation of starting condition influence on surface vibration response contribution can be rapidly achieved; the dynamic modeling and calculation precision is high, optimization iteration can be rapidly carried out on parameters influencing starting knocking, comparative analysis evaluation can be synchronously carried out on a plurality of influencing parameter combinations, hybrid power system engine starting working condition knocking NVH performance design can be guided, and the material object verification cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of computing and auxiliary engineering technology, and specifically relates to a hybrid system engine assembly transient operating condition NVH simulation method and storage medium. Background Art

[0002] With the continued popularity of the new energy vehicle market, high-power systems have gradually become global standards for hybrid vehicles, and highly integrated hybrid assembly systems have become one of the current development trends. Hybrid assemblies, especially P1 and P3 integrated configuration engines and dual-motor hybrid systems, have become the main development direction of the market. Due to the integration of multiple systems, the NVH control of this configuration hybrid system, considering the performance balance of each system, the performance control and performance simulation of transient conditions such as starting and shutting down have become one of the difficulties. The current simulation of hybrid system starting, shutting down and other working conditions mainly uses a one-dimensional model to simulate rigid body dynamics, and cannot simulate the surface vibration results of the hybrid system shell in the time domain. Based on this, it is urgent to develop a hybrid system engine assembly transient condition NVH simulation method to effectively solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a dynamic modeling method for the surface vibration response of the shell of a key component of a hybrid system engine starting condition. Starting from the simulation modeling of the hybrid engine starting condition, the multi-flexible body dynamics method is used, based on simulink joint simulation, and the starting torque, starting cylinder pressure, torque feedback control of the generator after starting and other parameters are integrated to solve the problem of predicting the shell vibration of transient conditions such as the hybrid system engine assembly starting.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A method for simulating transient NVH of a hybrid system engine assembly comprises the following steps:

[0006] A. Dynamic modeling of hybrid system engine starting condition;

[0007] B. Build the simulink starting cylinder pressure control model and generator torque control model;

[0008] C. Perform dynamic analysis and solve to calculate the excitation loads at key locations;

[0009] D. Result analysis and parameter optimization.

[0010] Furthermore, step A specifically includes the following steps:

[0011] A1. Obtaining hybrid system structural parameters;

[0012] A2. Obtain a three-dimensional model of the hybrid system, perform finite element modeling based on the three-dimensional model, perform modal calculation and dynamic compression of the hybrid system to obtain the structural stiffness matrix and mass matrix solution;

[0013] A3. Establish the dynamic model of the multi-flexible hybrid system assembly based on structural parameters, structural form, mass matrix and stiffness matrix;

[0014] A4. Determine key inertia parameters and analyze the dynamic model considering starting cylinder pressure excitation, generator torque control, and gear meshing parameters;

[0015] A5. Calculate the surface vibration velocity response of the hybrid component based on the modal method;

[0016] A6. Extract the vibration velocity response of the component surface nodes and calculate the vibration velocity response of the component surface.

[0017] Further, in step A1, the hybrid system includes an engine assembly and a transmission assembly.

[0018] Furthermore, the hybrid system is a dual-motor hybrid system assembly, which is composed of an ICE engine, a generator, a drive motor and multiple pairs of meshing gears.

[0019] Furthermore, step B specifically includes the following steps: building a simulink model of the engine starting cylinder pressure, and jointly linking the dynamic model with the simulink model.

[0020] Furthermore, step B: co-simulation of the simulink model focuses on the simulation cylinder pressure change data and motor torque change under starting conditions.

[0021] Furthermore, step C specifically includes the following steps: dynamic excitation calculation and surface vibration response calculation, dynamic analysis solution, and calculation of excitation loads at key positions.

[0022] Furthermore, step D specifically includes the following steps: analyzing the vibration response results of the housing of key components of the hybrid system, analyzing the vibration response results of the housing of key components under different influencing factors, and analyzing to obtain the optimal control parameters.

[0023] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any one of the above-mentioned methods for simulating transient NVH conditions of an engine assembly of a hybrid system is implemented.

[0024] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements any of the above-mentioned methods for simulating transient NVH conditions of a hybrid system engine assembly.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention can perform a relatively accurate analysis of the surface vibration response results of the key housing parts of the hybrid system, extract the vibration response results of the components, and predict the noise according to the surface vibration response results of the components; the results of the surface vibration response of the components under the comprehensive starting conditions are used to optimize the design of the key parts of the components; the present invention combines the hybrid system engine starting condition dynamics modeling method with simulink co-simulation, and can quickly realize the parameter analysis and evaluation of the contribution of the starting condition to the surface vibration response; the dynamic modeling and calculation accuracy of the present invention are high, and the parameters affecting the starting knock can be quickly optimized and iterated, and multiple influencing parameter combinations can also be compared, analyzed and evaluated simultaneously, which can better guide the hybrid system engine starting condition knock NVH performance design and reduce the physical verification cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 Schematic diagram of dual-motor hybrid system;

[0029] Figure 2 Schematic diagram of multi-flexible body dynamics modeling process for hybrid system starting condition;

[0030] Figure 3 Schematic diagram of multi-flexible body dynamics model of hybrid system engine assembly in transient dynamic condition;

[0031] Figure 4 Schematic diagram of simulink control model for starting cylinder pressure and generator torque control;

[0032] Figure 5 This is a schematic diagram of the structure of an electronic device. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with embodiments:

[0034] At present, the simulation of hybrid system starting, flameout and other working conditions mainly uses one-dimensional models to simulate rigid body dynamics, and cannot simulate the surface vibration results of the hybrid system shell in the time domain. Due to the integration of multiple systems, the NVH control of the hybrid system takes into account the performance balance of each system, and the performance control and performance simulation of transient working conditions such as starting and flameout become one of the difficulties. Starting from the simulation modeling of the hybrid engine starting condition, the present invention uses the multi-flexible body dynamics method, based on Simulink joint simulation, and integrates the starting torque, starting cylinder pressure, torque feedback control of the generator after starting and other parameters, which solves the problem of predicting the shell vibration of transient working conditions such as hybrid system engine assembly starting.

[0035] like Figure 1 As shown in the figure, the dual-motor hybrid system assembly consists of an ICE engine, a generator, a drive motor and multiple pairs of meshing gears. During the process from the generator dragging the ICE engine to the ICE engine ignition, the gear meshing state and the generator torque change will cause abnormal gear knocking noise, which is the main factor affecting the NVH performance of the hybrid system starting condition. Using the traditional one-dimensional physical model for calculation can only obtain trend results, and cannot simulate the vibration of the hybrid system housing, and cannot quantify the vibration and noise of the starting knocking results.

[0036] The present invention relates to a dynamic modeling method for NVH performance of a hybrid system engine assembly during transient working conditions such as starting and shutting down, which is a multi-flexible body dynamic modeling of a hybrid system starting working condition, comprising the following steps:

[0037] 1. Dynamic modeling of hybrid system engine starting condition;

[0038] 2. Build the simulink starting cylinder pressure control model and generator torque control model;

[0039] 3. Perform dynamic analysis and solve to calculate the excitation loads at key locations;

[0040] 4. Result analysis and parameter optimization.

[0041] Specifically, the hybrid system engine assembly transient operating condition NVH simulation method of the present invention is as follows: Figure 2 shown.

[0042] The dynamic modeling of the hybrid system engine starting condition includes the following steps:

[0043] 11. Obtaining structural parameters of a hybrid system; the hybrid system includes an engine assembly and a transmission assembly.

[0044] 12. Obtain a three-dimensional model of the hybrid system, perform finite element modeling based on the three-dimensional model, perform modal calculations and dynamic compression of the hybrid system to obtain the structural stiffness matrix and mass matrix solution.

[0045] 13. Establish the dynamic model of the multi-flexible hybrid system assembly based on structural parameters, structural form, mass matrix and stiffness matrix.

[0046] 14. Determine key inertia parameters and consider dynamic model analysis of starting cylinder pressure excitation, generator torque control, and gear meshing parameters;

[0047] 15. Calculate the surface vibration velocity response of the hybrid component based on the modal method;

[0048] 16. Extract the vibration velocity response of the component surface nodes and calculate the vibration velocity response of the component surface.

[0049] Build the simulink starting cylinder pressure control model and generator torque control model, specifically: build the simulink model of engine starting cylinder pressure, and jointly link the dynamic model with the simulink model. Simulink model joint simulation, pay attention to the simulation cylinder pressure change data and motor torque change under starting conditions.

[0050] Perform dynamic analysis and solve to calculate the excitation loads at key locations, specifically: dynamic excitation calculation and surface vibration response calculation. Perform dynamic analysis and solve to calculate the excitation loads at key locations.

[0051] Result analysis and parameter optimization, specifically: analyzing the vibration response results of the shell of key components of the hybrid system, analyzing the vibration response results of the shell of key components under different influencing factors, and analyzing to obtain the optimal control parameters.

[0052] The completed multi-flexible body dynamics model of the hybrid system starting condition is shown in the figure below: Figure 3 As shown in the figure, the simulink control models such as starting cylinder pressure and generator torque control are as follows Figure 4 shown.

[0053] Example 1

[0054] A hybrid system engine assembly transient NVH simulation method, such as Figure 2 As shown, the following steps are included:

[0055] 1. Dynamic modeling of hybrid system engine starting condition:

[0056] 11. Obtaining structural parameters of a hybrid system; the hybrid system includes an engine assembly and a transmission assembly.

[0057] 12. Obtain a three-dimensional model of the hybrid system, perform finite element modeling based on the three-dimensional model, perform modal calculations and dynamic compression of the hybrid system to obtain the structural stiffness matrix and mass matrix solution.

[0058] 13. Establish the dynamic model of the multi-flexible hybrid system assembly based on structural parameters, structural form, mass matrix and stiffness matrix.

[0059] 14. Determine key inertia parameters and consider dynamic model analysis of starting cylinder pressure excitation, generator torque control, and gear meshing parameters;

[0060] 15. Calculate the surface vibration velocity response of the hybrid component based on the modal method;

[0061] 16. Extract the vibration velocity response of the component surface nodes and calculate the vibration velocity response of the component surface.

[0062] 2. Build the simulink model of engine starting cylinder pressure, and jointly link the dynamic model with the simulink model. Simulink model joint simulation, pay attention to the simulation cylinder pressure change data and motor torque change under starting conditions.

[0063] 3. Dynamic excitation calculation and surface vibration response calculation. Perform dynamic analysis and solve to calculate the excitation loads at key locations.

[0064] 4. Result analysis and parameter optimization. Analyze the vibration response results of the shell of key components of the hybrid system, analyze the vibration response results of the shell of key components under different influencing factors, and analyze to obtain the optimal control parameters.

[0065] Example 2

[0066] Figure 5 This is a schematic diagram of the structure of a computer device in Example 2 of the present invention. Figure 5 A block diagram of an exemplary computer device 12 suitable for use in implementing embodiments of the present invention is shown. Figure 5 The computer device 12 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0067] like Figure 5 As shown, the computer device 12 is in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that connects various system components (including the system memory 28 and the processing unit 16).

[0068] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0069] The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0070] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 3 not shown, usually called a "hard drive"). Although Figure 3 Not shown in the figure, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0071] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0072] The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), may also communicate with one or more devices that enable a user to interact with the computer device 12, and / or communicate with any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). Such communication may be performed through an input / output (I / O) interface 22. In addition, the computer device 12 in this embodiment, the display 24 does not exist as an independent individual, but is embedded in the mirror surface, and when the display surface of the display 24 is not displayed, the display surface of the display 24 and the mirror surface are visually integrated. In addition, the computer device 12 may also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN) and / or public network, such as the Internet) through a network adapter 20. As shown in the figure, the network adapter 20 communicates with other modules of the computer device 12 through a bus 18. It should be understood that although not shown in the figures, other hardware and / or software modules may be used in conjunction with the computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0073] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing a hybrid system engine assembly transient operating condition NVH simulation method provided in an embodiment of the present invention.

[0074] Example 3

[0075] Embodiment 3 of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, a method for simulating transient NVH conditions of an engine assembly of a hybrid system is implemented as provided in all the embodiments of the present application.

[0076] Any combination of one or more computer-readable media may be used. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0077] Computer-readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0078] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0079] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0080] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for simulating transient NVH of a hybrid system engine assembly, characterized in that: The following steps are involved: A. Dynamic modeling of hybrid system engine starting condition; B. Build the simulink starting cylinder pressure control model and generator torque control model; C. Perform dynamic analysis and solve to calculate the excitation loads at key locations; D. Result analysis and parameter optimization.

2. The method for simulating transient NVH of a hybrid system engine assembly according to claim 1, characterized in that: Step A specifically comprises the following steps: A1. Obtaining hybrid system structural parameters; A2. Obtain a three-dimensional model of the hybrid system, perform finite element modeling based on the three-dimensional model, perform modal calculation and dynamic compression of the hybrid system to obtain the structural stiffness matrix and mass matrix solution; A3. Establish the dynamic model of the multi-flexible hybrid system assembly based on structural parameters, structural form, mass matrix and stiffness matrix; A4. Determine key inertia parameters and analyze the dynamic model considering starting cylinder pressure excitation, generator torque control, and gear meshing parameters; A5. Calculate the surface vibration velocity response of the hybrid component based on the modal method; A6. Extract the vibration velocity response of the component surface nodes and calculate the vibration velocity response of the component surface.

3. The method for simulating transient NVH of a hybrid system engine assembly according to claim 1, characterized in that: Step A1, the hybrid system includes an engine assembly and a transmission assembly.

4. The method for simulating transient NVH of a hybrid system engine assembly according to claim 3, characterized in that: The hybrid system is a dual-motor hybrid system assembly, which is composed of an ICE engine, a generator, a drive motor and multiple pairs of meshing gears.

5. The method for simulating transient NVH of a hybrid system engine assembly according to claim 1, characterized in that: Step B specifically includes the following steps: building a simulink model of the engine starting cylinder pressure, and jointly linking the dynamics model with the simulink model.

6. The method for simulating transient NVH of a hybrid system engine assembly according to claim 5, characterized in that: Step B, simulink model co-simulation, focusing on the simulated cylinder pressure change data and motor torque change under starting conditions.

7. The method for simulating transient NVH of a hybrid system engine assembly according to claim 1, characterized in that: Step C specifically includes the following steps: dynamic excitation calculation and surface vibration response calculation, dynamic analysis solution, and calculation of excitation loads at key positions.

8. The method for simulating transient NVH of a hybrid system engine assembly according to claim 1, characterized in that: Step D specifically includes the following steps: analyzing the vibration response results of the housing of key components of the hybrid system, analyzing the vibration response results of the housing of key components under different influencing factors, and analyzing to obtain the optimal control parameters.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, it implements any of the above-mentioned methods for simulating transient NVH conditions of a hybrid system engine assembly.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the program implements any of the above-mentioned methods for simulating transient NVH conditions of a hybrid system engine assembly.

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