In order to meet the requirements of the business enterprises for equipment monitoring instruments, an embedded data acquisition and analysis system based on Linux technique has been developed, and its hardware configuration and software structure were described. The system incorporates many functions in a unit, including data acquisition, real-time display, storage, analysis, and communication, etc., and has a high scalability, maintainability and reliability. The experiment results showed that its functions is stable, and can be widely used in the system monitor and diagnosis in various equipment and installations.

A type of pneumatic force servo system is discussed in this paper. In this system, output pressure depends on pressure difference between two chambers of cylinder; by controlling pilot-operated reducing valve will get different cylinder chamber pressure. Dynamic mathematical model and control Strategy of this system is founded in this paper. By mathematical model and control Strategy, the digital simulation results show how system performance with different gas source pressure and rodless cavity size..