Computer Control System Of Whole Granule Silver Catalyzer Evaluation System

Up to now, there is complete blank in the field of evaluation of full grain catalyzer in minitype evaluation in China. Inventing new-style minitype evaluation system of ten to fifty milliliter full grain catalyze has great promise. The dissertation is mainly description about automatic control in the basis of DCS in this system.In the first part of the paper, the brief introduction of DCS is given. DCS system is able to adapt many kinds of need in the industry production process and improve the level of manufacture automation and management. According to the real condition of the evaluation system of full grain silver catalyze, author bring out the corresponding control strategy to the three under-controlled physics object such as flow, pressure, temperature. Aiming at the rate-flow control system in this system, this paper gives a time-delay compensation control algorithm based on normal PID control. Then the control precision can be improved and it is easy to realize in DCS system. This algorithm does not depend on the precise math model of undercontrolled object. It not only improves the control precision of system but also overcomes the effect to the stability of control system brought by time-delay. Then this algorithm solves the difficult in the normal control algorithm such as the need of precise math model, difficulty to stable.The second part of the paper brings out the realization of control systemts control strategy, namely: the design and realization of application software of control system. Its content comprises the tap of the upper and under computer software of DCS. The software of under computer has several parts such as the design of CCC chart configuration, ladder logic chart (RLL) programming-flow control configuration, pressure control configuration, temperature control configuration and PWM pulse modulation configuration and etc. The software of upper-computer is the configuration of system monitor chart. It comprises the design of user flow chart, the configuration of history database, real-time data display and alarm monitor.