The Design of Digital Control System for Bio-fermentation Process Based on Embedded ARM9

The fermentation process is complex, involving the growth and metabolism of microbial cells, and is a nonlinear Time-variant system. The parameter measurement and operation monitoring of the fermentation production process have become the key to improving the accuracy of process control. Temperature of the fermentation process affects the enzyme reaction, the growth of bacteria and the product generated. Fuzzy PID control is employed to control the temperature in the paper, robustness, good dynamic response, small overshoot and high control precision. ARM9 microprocessor is employed as the core controller. In embedded Linux system, Qt/Embedded is used to make GUI graphical friendly user interface displayed on the LCD. The system is reliable.