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Underwater Robots - Gianluca Antonelli.pdf

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[deg]<br />

120<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

−20<br />

5.4 Experiments of Fault Tolerance to Thrusters’ Fault 103<br />

ψ<br />

φ , θ<br />

0 100 200 300 400<br />

time [s]<br />

d<br />

120<br />

100<br />

80<br />

60<br />

40<br />

20<br />

0<br />

−20<br />

ψ<br />

φ , θ<br />

A B<br />

0 100 200 300 400<br />

tim<br />

Fig. 5.9. Experiments of fault tolerant control on ODIN. Left: roll, pitch and yaw<br />

without thrusters’ faults. Right: roll, pitch and yaw with thrusters’ faults. A, first<br />

fault at t =260 satone horizontal thruster. B, second fault at t =300 satone<br />

vertical thruster<br />

[V] [V] [V] [V]<br />

2<br />

0<br />

−2<br />

2<br />

0<br />

−2<br />

2<br />

0<br />

−2<br />

2<br />

0<br />

−2<br />

0 100 200 300 400<br />

0 100 200 300 400<br />

0 100 200 300 400<br />

0 100 200 300 400<br />

time [s]<br />

[V] [V] [V] [V]<br />

2<br />

0<br />

−2<br />

2<br />

0<br />

−2<br />

2<br />

0<br />

−2<br />

2<br />

0<br />

−2<br />

0 100 200 300 400<br />

0 100 200 300 400<br />

0 100 200 300 400<br />

0 100 200 300 400<br />

time [s]<br />

Fig. 5.10. Experiments of fault tolerant control on ODIN. Left: voltages atvertical<br />

thrusters. Right: voltages athorizontal thrusters

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