Method of warm-up control base on PFC algorithm applied in the longitudinal zeeman thermal compensated frequency stabilization system

A method of warm-up control based on Predictive Functional Control (PFC) algorithm is proposed. The method uses the time lag of first order model to be the predictive model of the PFC algorithm, uses the Smith predictor to revise the output quantity, which can avoid the bad influence on the effect caused by the time lag of the heat-exchange in the process of warm-up, and the time of the process is much shorter; it uses the threshold quantity of the mode-jump time to be the criterion of the warm-up/frequency stabilization change, and the diversity of the subtraction of the referenced temperature and the ambient temperature is a constant. According to the experimental result, the system can finish the warm-up process to change into the frequency stabilization control in shorter than 17 minutes between 15-26°C, the diversity of warm-up time is shorter than 2 min, the diversity of the subtraction of the warm-up temperature and the ambient temperature is smaller than 1.5°C.