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In this paper, a design procedure is proposed for networked control systems (NCSs) using an embedded real-time operating system (RTOS). In a conventional design of NCSs, well-designed control algorithms do not result in the intended control performance after an implementation because of time delays, such as network-induced delays and controller computation delays. The proposed design procedure shows how to minimize the degradation of the control performance caused by the time delays. A performance index (PI) is derived from the difference between the performance of a simulated system and the performance of an implemented system with time delays. By using the proposed PI, optimized periods and priorities of tasks and communication messages of NCSs were determined. The design procedure was verified by designing a networked traction control system (TCS) using a real-time operating system for automotive electronics, OSEK-OS. The designed TCS was realized and tested by using a rapid control prototyping platform and a hardware-in-the-loop simulation environment. [ABSTRACT FROM AUTHOR]

Rapid control prototyping (RCP) is one of the most important technologies for speeding up the development process of the electronic control unit ( ECU ) used in the automotive control system. However, one big drawback of the conventional RCP platform is the transfer from RCP to target ECU implementation. In this study, a new RCP platform is proposed that provides a consistent environment for both the RCP development stage and the target ECU implementation stage. In order to make the rapid prototyping controller as similar to a production ECU as possible, the prototyping system follows the strictly layered architecture of the production ECU and separates the automatically generated code of software from the hand code. Finally, the feasibility of the developed target-identical RCP platform is evaluated through an air-to-fuel ratio (AFR) control application. [ABSTRACT FROM AUTHOR]