Method for computer-supported development of an overall system consisting of subsystems

Abstract

The invention relates substantially to a method for computer-supported development of an overall system consisting of subsystems, in which a combination of real products and virtual behaviour models simulated in real-time are used in the phases of the right branch of the V-model, wherein the development steps ''MIL'', ''SIL'' and ''VPIL'' each comprise an environment model, a reusable multiphysicsmodel and a software, and the development step "HIL'' comprises, in addition to the environment model, another remaining physics unit for simulation of the parts of the hardware of a product that areonly virtually present. In this way, the method enables a temporally parallel and spatially divided integration and a corresponding test of components on various levels, i.e. the right-hand branch ofa V-model, which can be performed to a large extent by the system developer. Open-loop and closed-loop control functions or processes for the overall system level can already be developed in this wayfor example, even though all of the subsystems are not yet present. No parallel systems are required, on which new processes are run-in in advance. Safety-critical systems can, for example, be testedentirely in the laboratory, before a test of the real overall system is carried out in the real environment of same. Some of the key components of the development method according to the invention, such as real-time multiphysics models from the simulation and automatic system tests of development step ''HIL'', are advantageously reusable.

Description

technical field [0001] For the development of complex functionality at the overall system level, knowledge of the performance of all subsystems is required. In the case of complex functions, this refers to functions that access information from different subsystems and output control commands to the different subsystems. Validation of these functions is therefore usually carried out on a well-established overall system. However, availability of the overall system is required for this. In order for a subsystem to be effective, there must be an input vector for the subsystem itself. This also presupposes knowledge of the corresponding behavior of the subsystems involved in the overall system. Background technique [0002] Previously, in the case of model-driven development of hardware-like software, models and threads (Streck) for control / regulation were designed and the corresponding control code was loaded onto the target system. Such developments typically have develo...

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Here, the software-only model hits its limits because it never portrays reality to 100%

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