Figure 9.
Three plots labelled a, b, and c compare displacement measurements from Y O L O and a laser sensor. Plot A presents displacement in millimetre on the vertical axis ranging from minus 2.5 to 2.5 millimetre and time in second on the horizontal axis ranging from 0 to 0.3 second. Two oscillating waveforms labelled Case 1 and Laser sensor closely overlap across repeated sinusoidal cycles with peak amplitudes near plus 2.2 millimetre and troughs near minus 2.1 millimetre. Plot b presents Y O L O displacement in millimetre on the vertical axis and laser sensor displacement in millimetre on the horizontal axis, both ranging from minus 2.5 to 2.5 millimetre. A clustered set of Case 1 data points follows a near-linear trend. A fitted line and a one-to-one reference line are displayed. The plot contains the regression equation y equals 1.0966 x and coefficient of determination R squared equals 0.9795. Plot c presents Y O L O displacement in millimetre against laser sensor displacement in millimetre with both axes ranging from minus 2.5 to 2.5 millimetre. Three lines labelled Case 1 fitting line, Case 2 fitting line, and one-to-one line are closely aligned across the full displacement range, indicating similar displacement relationships between the compared measurements.(a) Time histories of Case1 prediction and measured laser sensor displacement signal; (b) fitting result between Case1 prediction and laser measurement signals; and (c) comparison of Case1 and Case2 fitting results