CN112069601B - A Domain-Based Multi-level Optimal Design Method for Electric Chassis - Google Patents

Abstract

The invention discloses a domain-based multi-level electric chassis optimization design method, which aims at the design and implementation problems of a brand new electric chassis of an automobile, establishes a multi-level chassis architecture model and researches the whole automobile performance optimization matching and integration technology. Firstly, redefining a logic domain, a physical domain and a unified interface between the logic domain and the physical domain according to the functional requirements of a power system and a chassis system, and realizing the independence and the expansibility of an electric chassis; secondly, designing an energy management system of the electric chassis based on a logic domain and a physical domain and combining with functional requirements, and realizing energy distribution control strategies in charging, discharging and driving; finally, modularization and work coordination of all parts of the automobile are achieved based on a wire control technology and an electric control technology, and the use performance of the whole automobile is improved. Finally, the electric drive of the chassis is realized, the hardware modularization and the software platformization are developed, the brand new electric drive chassis is constructed, and a new idea is provided for the chassis framework design body of the automobile.

Description

A Domain-Based Multi-level Optimal Design Method for Electric Chassis

technical field

The invention belongs to the technical field of electrified chassis, and more specifically relates to a domain-based multi-level optimized design of electrified chassis.

Background technique

With the improvement of people's pursuit of material life and the continuous development of science and technology, the electrification and intelligence of automobiles have gradually evolved into the main trend of future automobile development, and are also the development goals pursued by many automobile R&D manufacturers. For example, the unmanned vehicles launched by Tesla of the United States and Changan Automobile in China have opened up a new direction for the research of vehicle electrification and intelligence;

Cars want to achieve electrification and intelligent control, and put forward higher and more severe requirements for the car chassis system. It is necessary for the car chassis system to have higher reliability and more convenient and quick control. On the basis of reducing the difficulty of car control, Avoid functional coupling phenomenon;

Up to now, the integrated control technology of electric vehicle chassis is still the main research topic of major automobile manufacturers, because the traditional automobile chassis system and structure are very complicated, and it is difficult to meet the needs of overall performance improvement, so it cannot meet the current requirements of electric vehicle chassis integration. To control the actual demand, it is urgent to develop a new chassis system in order to gain a place in the fierce market competition.

Contents of the invention

The purpose of the present invention is to provide a chassis electrification for the above problems, and develop a new electrification chassis system with hardware modularization and software platformization.

The purpose of the present invention can be achieved through the following technical solutions:

A domain-based multi-level electrified chassis optimization design method for integrated electric vehicles, which specifically includes the following steps:

S1: According to the functional requirements of the power system and chassis system, redefine the logical domain and physical domain and the unified interface between them to achieve the independence and scalability of the electrified chassis;

S2: Design the energy management system of the electrified chassis based on the logical domain and physical domain, combined with the functional requirements, and realize the control strategy of charging and discharging and energy distribution during driving;

S3: Based on the wire control technology and electronic control technology, realize the modularization and work coordination of various parts of the car, reduce the complexity of the car chassis structure, and improve the performance of the whole car. Ultimately realize the electrification of the chassis, develop a new electrified chassis with hardware modularization and software platformization.

The specific steps of step S1 are:

S1.1: Organize the structural topology of all logical domains and physical domains and the interfaces between them;

S1.2: Collect the interfaces of the organized logical domain and physical domain, unify all interfaces in the form of a bus, and facilitate the integration of the chassis and the expansion of the interface;

Among them, the logic domain in S1.1 is the control logic structure of the automobile chassis, which is the control logic framework of the entire vehicle chassis, that is, the control system controls each module of the automobile chassis, collects the information of each module, and realizes the control of the entire electrified chassis. Logical control structure; the physical domain is the integration of physical hardware modules of the automobile chassis, and each module is used to perform corresponding functions, collect information and transmit it to the controller;

The unified interface mentioned in S1.2 is the communication interface between each physical hardware module of the automobile chassis and the control system, redefines the logical domain and physical domain and the unified interface between them, and realizes the independence, scalability and improved integration of the electrified chassis sex.

The electrified chassis energy management system described in S2 realizes the control strategy of charging and discharging and energy distribution during driving according to the running state of the vehicle.

S3 considers designing the driving system and control system on the chassis, so that the control system, braking system and other on-board systems of the vehicle are realized by replacing the traditional mechanical methods with electrified control. The body and chassis are only connected through software and hardware interfaces. Realize the electrification of the chassis;

Furthermore, S3 should comprehensively consider the modularization and work collaboration of each vehicle system, and replace the traditional mechanical control application wire control technology and electronic control technology with a new electrified control method to improve the performance of the vehicle. and integration.

The purpose of the present invention is achieved like this.

The present invention is based on the domain-based multi-level electrified chassis optimization design method, aiming at the design and realization of the brand-new electrified chassis of automobiles, establishes a multi-level chassis architecture model, and studies the vehicle performance optimization matching and integration technology, wherein the multi-level chassis architecture The model includes functional requirements layer, domain layer, control layer and module layer. First, according to the functional requirements of the power system and chassis system, redefine the logical domain and physical domain and the unified interface between them to achieve the independence and scalability of the electrified chassis; secondly, based on the logical domain and physical domain, combined with functional requirements design The energy management system of the electrified chassis realizes the control strategy of charging and discharging and energy distribution during driving; finally, based on the wire control technology and electronic control technology, the modularization and work coordination of various parts of the car are realized, and the performance of the whole vehicle is improved. Ultimately realize the electrification of the chassis, develop a new electrified chassis with hardware modularization and software platform, and provide a new idea for the design of the chassis structure of the car.

Description of drawings

Fig. 1 is a schematic diagram of a specific embodiment of the multi-level structure of the motorized chassis in the present invention;

Fig. 2 is a flow chart of a specific embodiment of the domain-based multi-level motorized chassis optimal design method of the present invention.

Detailed ways

Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

Fig. 1 is a schematic diagram of a specific embodiment of the multi-level structure of the electric chassis in the present invention; as shown in Fig. 2, the specific steps of the domain-based multi-level electric chassis optimization design method of the present invention include:

Step 1: According to the functional requirements of the power system and chassis system, redefine the logical domain and physical domain and the unified interface between them to achieve the independence and scalability of the electrified chassis;

The concrete steps of described step 1 are:

Step 1-1: Organize the structural topology of all logical domains and physical domains and the interfaces between them;

Step 1-2: Gather the interfaces of the sorted logical domain and physical domain, and unify all interfaces in the form of a bus, which facilitates the integration of the chassis and the expansion of the interface;

The logic domain is the control logic structure of the automobile chassis, and this structure is the control logic framework of the whole vehicle chassis, that is, the control system controls each module of the automobile chassis, collects information of each module, and realizes the logic control structure of the entire electrified chassis; The physical domain is the integration of physical hardware modules of the automobile chassis, each module is used to perform corresponding functions, collect information and transmit it to the controller; the redefinition of the logical domain and physical domain and the unified interface between them, here The unified interface is the communication interface between each physical hardware module of the vehicle electrified chassis and the control system, redefines the logical domain and physical domain and the unified interface between them, and realizes the independence, scalability and improved integration of the electrified chassis. It is worth noting What is important is that the redefinition of the logical domain and the physical domain and the unified interface between them should take into account the ride comfort, handling stability, safety, energy consumption and weight of the electrified chassis.

Step 2: Design the energy management system of the electrified chassis based on the logical domain and physical domain, combined with the functional requirements, and realize the charging and discharging and energy distribution strategies during driving.

Step 3: Based on the wire control technology and electronic control technology, realize the modularization and work coordination of various parts of the car, reduce the complexity of the car chassis structure, and improve the performance of the whole car. Ultimately realize the electrification of the chassis, develop a new electrified chassis with hardware modularization and software platformization.

Consider designing the drive system and control system on the chassis, so that the vehicle control system, braking system and other on-board systems are realized by replacing traditional mechanical methods with electrified control, and the body and chassis are only connected through software and hardware interfaces to fully realize Electrification of the chassis;

Further, the domain-based multi-level electrified chassis optimization design described in step 3 is characterized in that it should comprehensively consider the modularization and work collaboration of each vehicle-mounted system, and apply the traditional mechanical control to the control-by-wire technology And electronic control technology is replaced by a new electrified control method to improve the performance and integration of the vehicle.

Furthermore, the domain-based multi-level motorized chassis optimization design described in step 3 is characterized in that the replacement with a brand-new motorized control method does not simply replace the traditional mechanical control application, and comprehensive consideration should be given here The accuracy and convenience of control and the high integration of the electrified chassis will eventually realize the electrification of the chassis, and the development of a new electrified chassis with hardware modularization and software platform.

Although the illustrative specific embodiments of the present invention have been described above, so that those skilled in the art can understand the present invention, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, As long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

Claims (1)

1. A domain-based multi-level motorized chassis optimization design method is characterized by comprising the following steps:

step 1: the multi-layer electric chassis comprises a function demand layer, a domain layer, a control layer and a module layer; the function demand layer comprises power system function demands and chassis system function demands and is connected with an energy management system of the electric chassis; the domain layer comprises a logic domain and a physical domain, the control layer comprises a line control layer and an electric control layer, and the module layer mainly comprises various modules on the chassis; according to the functional requirements of a power system and a chassis system, redefining a logic domain, a physical domain and a unified interface between the logic domain and the physical domain, redefining the structural topology of each physical hardware module and a control system of an automobile chassis, and realizing the independence and extensibility and improving the integration of an electric chassis: the logic domain is a control logic structure of the automobile chassis, and the structure is a control logic framework of the whole automobile chassis, namely a control system controls each module of the automobile chassis, collects information of each module and realizes a logic control structure of the whole electric chassis; the physical domain is the integration of physical hardware modules of the automobile chassis, and each module is used for executing corresponding functions, collecting information and transmitting the information to the controller;

step 2: based on a logic domain and a physical domain, an energy management system of the electric chassis is designed by combining functional requirements, and energy distribution control strategies in charging, discharging and driving are realized according to the running state of the automobile, so that the energy distribution control strategies in charging, discharging and driving are realized;

and step 3: the modularization and work coordination of each part of the automobile are realized based on a wire control technology and an electric control technology, the complexity of the automobile chassis structure is reduced, and the use performance of the whole automobile of the automobile is improved; finally, the electric chassis is realized, the hardware modularization and the software platform are developed, and a brand new electric chassis is constructed; the modularization and work coordination of each vehicle-mounted system are comprehensively considered, the driving system and the control system are designed on the chassis, the traditional mechanical control application line control technology and the electric control technology are replaced by a brand-new electric control mode, and the service performance of the whole automobile is improved; in consideration of the accuracy and convenience of control and the high integration of the electric chassis, the vehicle body is connected with the chassis only through software and hardware interfaces, the electric chassis is finally realized, and the electric chassis with hardware modularization, software platformization and brand new architecture is developed.

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