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Thesis - Leigh Moody.pdf - Bad Request - Cranfield University

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Appendix B / Frames of Reference<br />

_ _<br />

15.10 Missile IMU Frame<br />

The Missile IMU frame (MU) is located at point (u), the point to which all<br />

its inertial sensors are referred. The MU frame is rotated through YPR<br />

angles with respect to the Missile Body frame such that it is aligned with the<br />

principal IMU sensor input axes.<br />

M<br />

Y<br />

M<br />

Z<br />

A<br />

Z<br />

O<br />

15.11 Seeker LOS Frame<br />

M<br />

X<br />

15-7<br />

A<br />

Y<br />

A<br />

X<br />

Z B<br />

Figure 15-4 : Missile Frames of Reference<br />

m<br />

X B<br />

X MV<br />

The Seeker LOS frame (S) shown in Figure 15-5 is located at point (m) and<br />

are rotated through YP angles with respect to the Missile Body frame until<br />

X S passes through point (t). When the Missile Body and Seeker LOS<br />

frames are aligned, and the missile flies straight and level, Y S and Z S point<br />

right and down respectively.<br />

15.12 Seeker Head Frame<br />

The Seeker Head frame (H) is located at point (m) and is defined by the<br />

angular displacement of the YP gimbals with respect to the Missile Body<br />

frame. X H points along the seeker boresight normal to the detector, and is<br />

B<br />

Y

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