一种新的模糊-卡尔曼滤波器的控制算法及应用

Control algorithm and application of a new fuzzy-Kalman filter

中文关键词  模糊-卡尔曼滤波  高速剪切  预测

英文关键词  fuzzy-Kalman filter  high speed cutting  prediction

中文摘要

      针对高速剪切中管材运动需要精确而快速的预测问题,提出了一种新的模糊-卡尔曼滤波器:将过程噪声、量测噪声与残差均值和残差方差之间分别建立模糊曲面;省略模糊规则推理;将滤波器的采样时间与剪切误差之间的关系模糊化.以这样结构的滤波器来提高对剪切误差的跟踪和预测能力.仿真结果显示,新的模糊-卡尔曼滤波器比传统的卡尔曼滤波器更快和更稳定地将剪切误差进行抑制,而且剪切精度得到提高.

英文摘要

      A new fuzzy-Kalman filter is presented to meet the requirement of accurate and quick prediction of the tube's movement in high speed cutting machine.Two fuzzy surfaces are used to represent respectively the relation between process noise and the mean and covariance of residual,as well as the relation between measurement noise and the mean and covariance of residual,which makes the reasoning of fuzzy rule unnecessary.The relation between the filter sampling time and cutting error is fuzzed.The capability of tracking and the prediction of cutting error are improved by the filter with this structure.The simulation shows that the new fuzzy-Kalman filter has advantages over those available methods in higher speed and better stability in reducing cutting error and improving precision.