Abstract：The precision, speed and stability of the liquid output of the liquid system are the basis of the function of the digital PCR
detector. In order to solve the problem of large resistance and large delay in the liquid circuit system of the digital PCR detector,
the structure of the double closed loop control system based on the Smith-PID algorithm was proposed. A double closed loop ratio
control system was constructed according to the injection pump, the control object model and Smith controller principle. In addition,
modeling and simulation was performed on the system for the use of Simulink, and a better response curve was obtained compared to
the traditional PID. In the digital PCR detector liquid circuit system verification, we found that compared with the traditional double
closed loop liquid path of PID control, the settling time of the double closed loop ratio control system Smith-PID control samples
reduced 2/3, dilution adjustment time reduced 1/3, the steady-state error reduced 8%. In conclusion, the Smith-PID control algorithm
can improve the rapidity, accuracy and stability of the flow output system.
陈庆明a，刘经龙b，李冬梅a. 基于Smith-PID的数字PCR检测仪液路双闭环比值控制系统的设计[J]. 中国医疗设备, 2017, 32(10): 33-38.
CHEN Qingming, LIU Jinglong, LI Dongmei. Design of Double Closed Loop Ratio Control System of the Digital PCR
Detector Based on Smith-PID. China Medical Devices, 2017, 32(10): 33-38.
