To improve the validation and evaluation of logical system architecture (LSA) in the early phase of system development, a function-oriented development process in the form of a double-V-model is proposed for the vehicle E/E system and software development. The tools DaVinci SAR, Matlab / Simulink / Stateflow and CANoe are arranged together to support the automation of the new development process. For the automation of function distribution, a partitioning algorithm is developed based on the evolutionary algorithm. The graphical representation of the software and hardware system enables an efficient representation of function distribution solutions as mapping system individuals. For the optimization algorithm SPEA2 is chosen to explore the Pareto-fronts due to its good performance, specifically in terms of convergency and diversity. An overview of the abstract levels of the vehicle E/E system from both logical and technical aspects is explained, which leads to a top-down decomposition process and a bottom-up estimation process of the logical system. Following the top-down decomposition process, a fourlayer logical system architecture is proposed, which enables a higher reusability, i.e. scalability and extensibility of the logical system architecture. Four criteria are introduced in this thesis to analyze the LSA, i.e. reusability, resources, stability and maturity. For the evaluation of these criteria, the software size metric 'function point' is chosen and adapted for the embedded system and software. Based on this metric, an estimation method for the logical system is developed for the vehicle E/E system. Some results for the evaluation of the estimation method at application and system levels with an example system are shown. An automatic FP counting program is developed for the software applications specified with Matlab/Simulink-Stateflow models. The estimation results of PSP and DSP front the automatic FP counting program are evaluated. The estimation method at system level is applied for resources and reusability analysis based on a variety analysis of the applications. The partitioning algorithm has been applied to the exploration of Pareto solutions based on three criteria: ECU balance, ECU variance and ECU communication. As a summary of the results in this thesis, it has been proven that the estimation method is applied at three levels as application, function group and system. It can be used to analyze a logical system with different configurations for a common E/E architecture. The new function-oriented development process proposed in this thesis can be applied to the early phase of vehicle system development.


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    Titel :

    A new function-oriented design method based on the function point estimation of embedded system specification for automotive applications


    Weitere Titelangaben:

    Ein neues funktionsorientiertes Verfahren basierend auf der Funktionspunktanalyse von eingebetteten Systemspezifikationen für fahrzeugtechnische Anwendungen


    Beteiligte:
    Lu Bai (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2006


    Format / Umfang :

    170 Seiten, Bilder, Tabellen, Quellen




    Medientyp :

    Hochschulschrift


    Format :

    Print


    Sprache :

    Englisch