CN112069601B - Domain-based multi-level motorized chassis optimization design method - Google Patents
Domain-based multi-level motorized chassis optimization design method Download PDFInfo
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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
Technical Field
The invention belongs to the technical field of electric chassis, and particularly relates to a domain-based multi-level electric chassis optimization design.
Background
With the improvement of people's pursuit of living matters and the continuous development of science and technology, the electromotion and intelligence of automobiles gradually become the main trend of future automobile development, and are also the development targets pursued by many automobile developers at present. Such as: unmanned vehicles launched by the United states Tesla company and domestic Changan vehicles open a new direction for electric and intelligent research of vehicles;
the automobile is required to realize electric and intelligent control, higher and more severe requirements are also put forward on an automobile chassis system, the automobile chassis system is required to have higher reliability and more convenient and faster control, and the functional coupling phenomenon is avoided on the basis of reducing the control difficulty of the automobile;
the integrated control technology of the chassis of the electric automobile is still a main research topic of various automobile manufacturers until the development, and because the traditional automobile chassis system and the structure are very complex and the requirement of improving the overall performance is difficult to meet, the actual requirement of the integrated control of the chassis of the electric automobile at present cannot be met, and a brand new chassis system is urgently needed to be developed to take a place in the intense market competition.
Disclosure of Invention
The invention aims to provide an electric chassis system with a novel structure, which is developed by the electric chassis system with hardware modularization, software platform.
The purpose of the invention can be realized by the following technical scheme:
a domain-based multi-level motorized chassis optimization design method is used for an integrated electric automobile, and is characterized by specifically comprising the following steps:
s1: according to the functional requirements of a power system and a chassis system, a logic domain, a physical domain and a unified interface between the logic domain and the physical domain are redefined, and the independence and the extensibility of the electric chassis are realized;
s2: 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;
s3: based on the wire control technology and the electric control technology, modularization and work coordination of all parts of the automobile are realized, the complexity of the automobile chassis structure is reduced, and the use performance of the whole automobile is improved. Finally, the electric chassis is realized, and the development has the advantages of hardware modularization, software platformization and brand new electric chassis architecture.
The specific steps of step S1 are:
s1.1: organizing the structural topology of all the logical domains and the physical domains and the interfaces among the logical domains and the physical domains;
s1.2: the interfaces of the logic domain and the physical domain which are well arranged are gathered, and all the interfaces are unified in a bus form, so that the integration of the chassis and the expansion of the interfaces are facilitated;
the logic domain in the S1.1 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;
the unified interface in S1.2 is a communication interface between each physical hardware module of the automobile chassis and the control system, the logic domain and the physical domain are redefined, and the unified interfaces among the logic domain and the physical domain are redefined, so that the independence and the extensibility of the electric chassis are realized, and the integration is improved.
And S2, the energy management system of the electric chassis realizes energy distribution control strategies in charging, discharging and driving according to the running state of the automobile.
S3, a driving system and a control system are designed on the ground, so that a control system, a braking system and other vehicle-mounted systems of the vehicle are realized by replacing a traditional mechanical mode with an electric control mode, and a vehicle body is only connected with a chassis through a software and hardware interface, so that the electric operation of the chassis is comprehensively realized;
further, S3 comprehensively considers modularization and work coordination of each vehicle-mounted system, replaces the traditional mechanical control application line control technology and the electric control technology with a brand-new electric control mode, and improves the whole vehicle use performance and integration level of the vehicle.
The object of the invention is thus achieved.
The invention relates to a domain-based multilayer electric chassis optimization design method, which aims at the design and realization problems of a brand new electric chassis of an automobile, establishes a multilayer chassis architecture model, and researches the performance optimization matching and integration technology of the whole automobile, wherein the multilayer chassis architecture model comprises a function demand layer, a domain layer, a control layer and a module layer. Firstly, 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 to realize 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 electric drive chassis with hardware modularization and software platformization and brand new electric drive chassis is constructed, and a new idea is provided for the chassis framework design body of the automobile.
Drawings
FIG. 1 is a schematic view of an embodiment of a motorized chassis multi-level structure according to the present invention;
FIG. 2 is a flowchart of an embodiment of the method for optimizing and designing a domain-based multi-level motorized chassis according to the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided in order to better understand the present invention for those skilled in the art with reference to the accompanying drawings. It is to be expressly noted that in the following description, a detailed description of known functions and designs will be omitted when it may obscure the subject matter of the present invention.
FIG. 1 is a schematic view of an embodiment of a motorized chassis multi-level structure according to the present invention; as shown in fig. 2, the domain-based multi-level motorized chassis optimization design method of the present invention specifically includes the steps of:
step 1: according to the functional requirements of a power system and a chassis system, a logic domain, a physical domain and a unified interface between the logic domain and the physical domain are redefined, and the independence and the extensibility of the electric chassis are realized;
the specific steps of the step 1 are as follows:
step 1-1: organizing the structural topology of all the logical domains and the physical domains and the interfaces among the logical domains and the physical domains;
step 1-2: the interfaces of the logical domain and the physical domain which are well arranged are gathered, and all the interfaces are unified in a bus form, so that the integration of the chassis and the expansion of the interfaces are facilitated;
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; the logic domain, the physical domain and the unified interface between the logic domain and the physical domain are redefined, the unified interface is a communication interface of each physical hardware module and a control system of the electric chassis of the automobile, the logic domain, the physical domain and the unified interface between the logic domain and the physical domain are redefined, the independence, the extensibility and the integration improvement of the electric chassis are realized, and the redefined logic domain, the physical domain and the unified interface between the logic domain and the physical domain are worthy of comprehensively considering multiple targets of smoothness, operating stability, safety, energy consumption, weight and the like of the electric chassis.
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 a charge-discharge and driving energy distribution strategy is realized.
And step 3: based on the wire control technology and the electric control technology, modularization and work coordination of all parts of the automobile are realized, the complexity of the automobile chassis structure is reduced, and the use performance of the whole automobile is improved. Finally, the electric chassis is realized, and the electric chassis with hardware modularization, software platformization and brand new structure is developed.
The driving system and the control system are designed on the ground, so that the control system, the braking system and other vehicle-mounted systems of the vehicle are realized by replacing the traditional mechanical mode with the electric control, and the vehicle body is only connected with the chassis through software and hardware interfaces, so that the electric operation of the chassis is comprehensively realized;
further, the domain-based multi-level electric chassis optimization design in the step 3 is characterized in that modularization and work synergy of all vehicle-mounted systems are comprehensively considered, a traditional mechanical control application line control technology and an electric control technology are replaced by a brand-new electric control mode, and the whole vehicle use performance and the integration level of the vehicle are improved.
Further, the domain-based multi-level motorized chassis optimization design in step 3 is characterized in that a brand-new motorized control mode is replaced, traditional mechanical control applications are not simply replaced, the control accuracy, convenience and high integration of the motorized chassis are comprehensively considered, the motorized chassis is finally realized, and the domain-based multi-level motorized chassis is developed to have hardware modularization, software platformization and brand-new motorized chassis architecture.
Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all matters of the invention which utilize the inventive concepts are protected.
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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