Traditional Chinese Medicine Production Condensed Section In Control System Development,

This project is funded by State Development Planning Commission, and is the Science-Tech Tackle Key Project of HaYaoCiHang Pharmaceutical Co, Ltd.The main work of this paper is the study and development of the intellective control devices about the concentrate process of the traditional Chinese medicinal production. It contains the analysis of the production processing mechanism, the building of the math medal, the study of the DMC—PID control method and the design of the intellective control device.The concentrate process of the traditional Chinese medicinal production is a complicated non-linearity and time-delay system, which has multivariable coupling and varies with the time. In order to achieve the consistent of the production, the evaporation speed, temperature, pressure and so on should be controlled efficiently by adjusting various valves accurately.The craft processing is briefly introduced and the mechanism of the evaporator is analyzed in the paper. Aimed at the characters of the evaporation process in traditional Chinese medicinal production, thecontrol method--DMC-PID in series control is proposed to realizethe optimization of the evaporation speed. This arithmetic has many advantages to deal with the control of the complicated non-linearity subject with high jamming. The outside circle is DMC arithmetic which uses step response as its model because it can be measured easily. And the good robustness and track character can be obtained. The inside circle is PID arithmetic which has excellent noise immunity, so at the same time it remedy the insufficiency of DMC arithmetic. The DMC-PID arithmetic is very fit for the concentrate process of the traditional Chinese medicinal production.Based on the theoretical research, aimed at the control of the whole process in Chinese Traditional Medicine production, a intellective control system is developed.Which is composed of IPC, sensor, valve, data collection card and so on. The experimental and practical results show that the equipment can dynamically track the change of the production desire, rapidly realize the stability of the control system, and all the parameters reach or exceed the national criterion. At the same time the equipment effectively achieves the quality control, highly improves the efficiency of CTM's concentration.