基于有限项频率特性序列模型的前馈跟踪控制

为了改善跟踪控制精度 ,针对被控对象精确模型不易于辨识的情况 ,根据有限个特征频率处的频响特性试验数据 ,提出了一种近似模型 :有限项频率特性序列模型 ,并在此基础上提出了频域幅相调整控制算法。仿真结果表明 ,在不需要预知被控对象精确模型的情况下 ,对无急剧尖角变化的参考输入轨迹 ,该方法可以实现高精度跟踪控制。

FEEDFORWARD TRACKING CONTROL BASED ON LIMITED FREQUENCY RESPONSE SERIES MODEL

If the model of the controlled system is poorly known, an approximate one, based on experimental data at specified frequencies, is developed and is defined as a limited frequency response series model. Using this model, an amplitude and phase adjusting controller in frequency domain (APACFD) algorithm is developed to improve the tracking accuracy. The simulation result shows that this algorithm is very effective in tracking the contour, which has no sharp corners, even if the exact model of the controlled system is unknown.