Soft Enabled Control's Research And Application Of Embedded Real-time Control System

Embedded real-time control system (ERCS) is obvious different from the traditional control systems on system construction and software design. The real-time control software (RCS).of ERCS must be satisfied with hard real-time restriction and fault tolerance. It must execute on the platform with limited computing resource and process interactions with the physical environment. The components of it are always distributing on different computers and equipments of network. It should solve control algorithm and time restrictions. Because the control system is a huge system based on components, the software must be open and heterogeneous, so it is not a special soft, and it can support the third party implication to be used on different platforms. Consequently, it is impendency to construct a software model to simplify the development of ERCS.Soft enabled control (SEC) is coming into being on this technique background. The main content of this task is the software design problem of RECS. It discusses the resolve of ERCS-development method of SEC model. We can make so-called 'vertical lay' accord and 'horizontal lay' accord, using SEC model to design ERCS. 'vertical lay' accord is control algorithm consist with control software. There are two means in it: firstly, separating control timing form control functionality, model timing is accord with software timing; then the design of control algorithm is accord with software design on the soft tools. The means of 'horizontal lay' accord is the design of soft is consentaneous, no matter what object control platform (including hardware platform and operating platform), and what network architecture of control object.In this paper we start from the common principle of embedded real-time system (ERS), introduce the character of ERS, the management, scheduling and communication of real-tune tasks. Then introduce the characters and development of embedded real-time operating system (EROS), the real-time performance contrast between Windows CE.NET (which Is used in this research problem) with several popular EROS. We expound the principle of SEC model, especially the Giotto model used in this task and introduce the working principle, development tools and developing method of it. At last we use an example to explain the design and realize process of ERCS using SEC model.