Fault Identification Method of Diesel Engine in Light of Pearson Correlation Coefficient Diagram and Orthogonal Vibration Signals

Figure 5

Comparison of diesel engine fault identification results by GRNN.

(a) Using vibration signal of cylinder head top

(b) Using vibration signal of cylinder head side

(c) Using orthogonal vibration signals

(d) Using vibration signal of cylinder head top, optimized by PCC Diagram

(e) Using vibration signal of cylinder head side, optimized by PCC Diagram

(f) Using orthogonal vibration signals, optimized by PCC Diagram

(g) Using orthogonal vibration signals, introducing cross-correlation coefficient

(h) Using orthogonal vibration signals, optimized by PCC Diagram, introducing cross-correlation coefficient