The digital quartz flexible accelerometer has become a new trend of the quartz flexible accelerometer because of its high reliability and easy integration. But the existing digital closed-loop control of digital quartz flexible accelerometer mostly adopts PID algorithm

which has problem of big overshot

long setting time and low precision. Aiming at this problem

digital closed-loop control algorithm based on the method of ripple-free deadbeat is put forward. It is proved that at the same bandwidth and frequency

the system overshoot of this algorithm far less than 5%

setting time only need 3 sampling periods and steady-state error is far less than 0. 001 %

all these properties are better than PID algorithm.