基于δ算子的格形故障检测滤波器

本文基于δ算子构造了Hilbert空间中的信号向量,推导了系统的输入输出关系,得出了前向和后向预测误差向量的表达式.借助格形滤波器理论导出了故障残差序列的递归算法,从而设计出故障检测滤波器.将该滤波器与自适应噪声抵消技术相结合,实现了对被噪声污染信号的故障实时在线检测.最后,仿真实验验证了这种故障检测方法的有效性.

Delta Operator-Based Lattice Fault Detection Filter

In this paper, based on Delta Operator, signal vectors of Hilbert space are constructed, an input-output model is derived, and both the forward and backward prediction error vectors are described. With the help of Lattice filters, recursive algorithms for generating time-updated as well as order-updated residual series are formed, so that a fault detection filter is designed. Combined with the approach of adaptive noise canceling, real time, on-line fault detection is carried out. Finally.simulating experiments show that this fault detection method is effective.