An Adaptive Noise Reduction Method Based on Improved Dislocation Superposition Method for Abnormal Noise Fault Component of Automotive Engine

Figure 1

Diagram of DSM. S is the target signal; N is the interference signal; SN is a mixed signal of S and N; SN₁, SN₂, and SN₃ are the superposition signals obtained by superposition of 5, 15, and 20 times, respectively, using equation (1). The superposition step length L is the period of signal S.