基于采样控制系统直接设计理论的QFT设计方法及应用研究

Study on QFT Design Method and Application Applying Sampled-data Control Theory

从频域设计角度出发 ,应用离散信号分析方法 ,提出了仿真转台周期时变系统———采样控制系统QFT设计参数的选取方法 ,并应用采样控制系统直接设计方法 ,在不丢失采样时刻之间系统信息的条件下 ,通过对系统进行提升化处理 ,求解等效离散系统 ,使仿真转台伺服控制系统的QFT设计问题转化为采样控制系统混合灵敏度设计问题 ,为仿真转台数字控制器的设计提供了一种新方法。

In this paper, applying discrete signals analysis method in frequency domain, we provide the QFT parameters selection method for the period time variant systems of simulation tables, which is the sampled data control system. Moreover, by using the direct design method of the sampled data control system to avoid losing the information between the adjacent samples, we convert the QFT design problem for the simulation table servo control system into the mixed sensitivity problem for the sampled data control system through lifting the period time variant system and deriving the equivalent discrete system. By this way, we give a new method to design the discrete controller for the simulation tables. In the end, a QFT design example for a simulation table control system is given.