离心-温度复合试验箱温度精密控制方法

研究用于加速度计计量校准的离心-温度复合试验箱地面温度控制方法。首先提出实现试验箱高低温环境的温控系统设计方案,进而针对气体温度大惯性、大延迟的特点,提出将预测PI控制方法和串级控制相结合的新型预测PI-PID串级控制技术应用于离心-温度复合试验箱的温度控制,它既克服了单纯PID鲁棒性差的特点,又克服单纯预测PI控制由于单层结构而抗二次干扰差的问题,两者的结合提高了系统控制性能,克服了纯滞后对系统的不良影响。仿真结果表明:预测PI-PID串级控制系统具有较好的鲁棒性及良好的调节性能,其总体性能优于单纯PID控制和传统PID-PI串级控制系统。

Centrifugal-temperature Composite Chamber Temperature Precision Control Method

A temperature control method is designed for centrifugal-temperature composite chamber for calibration of accelerometers. A design scheme is proposed for the temperature control system at first. And then, aiming at gas temperature large inertia and large delay characteristics, a Predictive PI-PID cascade control method is proposed that Predictive PI control and cascade control method are combined for the temperature control of the centrifugal-temperature composite chamber. It overcomes the poor robustness of simple PID and the adverse effects of pure delay system. The results show that: predictive PI-PID cascade control system is robust and has good regulation performance, and the performance is better than the PID and traditional PID-PI Cascade Control System.