主动隔振中气动压力跟踪的预测控制研究

气动伺服系统的压力跟踪是主动隔振系统中的一个重要环节。本文根据气动伺服系统的特点，建立了系统压力工作点的模型，应用基于状态空间的预测控制方法对系统压力进行了轨迹跟踪控制。首先，提出了一种控制器切换的方法来消除压力跟踪过程中的稳态误差；其次，通过对预测控制算法的改进减小了滞后对闭环系统动态性能和稳定性的影响。实验表明，本文提出的方法有效地解决了主动隔振系统中的气动压力跟踪问题。

Predictive Control of Pressure Tracking for Active Pneumatic Vibration Isolation System

Pressure tracking of a pneumatic servo system plays an important part in the active pneumatic isolation technique. A linearized model at the pressure work point is built according to the characteristic of the pneumatic servo system, then a kind of modelpredictive control algorithm in state space is applied to the model, and some problems including steady state error, time delay are investigated, where a controller switch method is proposed to remove the steady state error, and time delay of the pneumatic servo system is taken into account by means of modifying the predictive control algorithm. The experimental results show that the proposed predictive control is an effective one for the pressure tracking of the pneumatic servo system.