Study On Vehicle Test Data Management And Reuse

Test data has virtual means to automobile design since it results from lots of repetitious work and can be an important reference to design processes. However, these data can easily be modified or deleted with the reason that test data has various formats and it is managed base on the operate system (OS) file system which has very limited ability of user access control. This situation may give a negative effect to data analysis and lead to more repetitious work; a Database Management System (DBMS) is established in this paper to manage test data generated in automobile design processes.Test data management changes with customers as each enterprise has its own special requirements according to their development procedures, so there are no commercial products available at present. Test data are organized separately and their schemas are complex and variable,which demand engineering data management systems to be able to manage data centralized , to be both customizable and extensible.Based on a broad survey on users'operate custom and the analysis of typical test data files, a detailed system requirement was concluded including basic characters of test data management and the necessity of Engineering Database (EDB) establishment.Based on the analysis of requirement, a software solution is established including conceptual design, function module partition, overall design, architecture design,scheme design. The C/S mode and guiding principles of database design were determined. Rules how to map objects into relational database were summarized after the designing of Oracle database. A security model was established in TDM, which can support structural management for various kinds of test data with the guarantee of data security and data validation. A framework of data analysis and reuse was presented and users can give a rapid use of historical data during data analysis processes. Four data controls were designed to show test data in diagram. The features and implied information behind test data can easily be found with the assistant of user interactive interface and other tools provided by controls.TDM is a software product that manages formatted test data that used to analyze automobile performance during the automobile development processes. These data is result from the test of engine, car body, suspension system, drive line system,and other car components. The data import module can identify many data files with various formats and reorganize them in order to add them into database with uniform format. Other modules also play an important role to keep data's validity and security. Based on Oracle 9i database, TDM can arrange data in a logical way with the support of data import function. Uses can easily locate the target data items just by mouse clicking or using searching module with the implementation of data navigation.The characters of automobile test data were summarized through the development of TDM. A doable solution of data quantity management was proposed to solve the problem that different test data files have different quantity definition. The way to import lms data into TDM was also realized by using LMS Test.Lab Automation. An approach to protect test data from illegal operation was proposed. How to reuse historical data and give them full potential are discussed combing with display control design process. These special characters of Engineering Data Base (EDB) are summarized. Farther development and improvement of TDM are also proposed in this article.