RELATIVE ERROR 
1.0 . 
oe | mY ‘ j 
0.6 
0.4 ce se 
0.2 b RY Ye W/ 
balboa | bw COHERENCY 
PHASE SHIFT 
-2x 
0.8- 
0.7F AMPLITUDE 
0.6+ GAIN 
A FOURIER INVERSION OF 
IMPULSE RESPONSE 
RESPONSE OF ROLL TO WAVE HEIGHT 
Fig. 3.10. Frequency response of roll to wave height. 
(From Yamanouchi.?2) 
WAVE ELEVATION OBSERVED TIME - 
ROLL MOTION. 
ie BSERVED 8°P 
cs ros os y 
WAVE ELEVATION TIME - 
OBSERVED , 30 ill 
ae fee eles gel 
V V, V/ V \/ \/ Van a Ve i \/ 
oTIGN 8°P OBSERVED!_99 m/m_ x BY FOURIER JTRaNs OF H (w). © BY h, FROM 
Fig. 3.11. Comparison of synthesized and observed output of roll. 
(From Yamanouchi.?2) 
76 
