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

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Appendix I / Utilities / Point Mass Kinematics<br />

_ _<br />

Θ&<br />

&<br />

B<br />

A<br />

ϕ<br />

1<br />

: =<br />

⎛<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

ω<br />

⋅ cosΦ<br />

⎟ ( ) ⎟⎟ ⋅<br />

YB B ZB B<br />

B<br />

B<br />

ω ⋅ sin Φ + ω ⋅ cosΦ<br />

⋅ tan Θ Θ&<br />

AB<br />

YB<br />

AB<br />

A<br />

B<br />

A<br />

22.5-7<br />

− ω<br />

AB<br />

ZB<br />

AB<br />

⋅ sin Φ<br />

A<br />

B<br />

A<br />

A<br />

⎞<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

T<br />

⎛<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

Φ&<br />

B<br />

A<br />

A<br />

⎞<br />

⎠<br />

Equation 22.5-38<br />

YB ZB B<br />

B ZB YB B<br />

B<br />

( ω&<br />

− ω ⋅ Φ&<br />

) ⋅ cos Φ − ( ω&<br />

+ ω ⋅ Φ&<br />

) ⋅ sin<br />

: =<br />

Φ<br />

Φ&<br />

&<br />

A,<br />

B<br />

B<br />

A<br />

If the roll angle is zero,<br />

E&<br />

&<br />

B<br />

A<br />

A,<br />

B<br />

XB<br />

A,<br />

B<br />

A<br />

B<br />

A<br />

A<br />

B<br />

A<br />

A,<br />

B<br />

B<br />

A<br />

B<br />

A<br />

A,<br />

B<br />

: = ω&<br />

+ Ψ&<br />

& ⋅ sin Θ + Ψ&<br />

⋅ Θ&<br />

⋅ cos Θ<br />

: =<br />

⎛<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

22.5.9 Cartesian to Euler Rates<br />

ω&<br />

ZB<br />

A,<br />

B<br />

− Ψ&<br />

&<br />

+ ω<br />

B<br />

A<br />

ZB<br />

A,<br />

B<br />

⋅ sin Θ<br />

⋅ ω<br />

B<br />

A<br />

YB<br />

A,<br />

B<br />

ω&<br />

YB<br />

A,<br />

B<br />

− Ψ&<br />

⋅ tan Θ<br />

B<br />

A<br />

⋅ Θ&<br />

B<br />

A<br />

B<br />

A<br />

⋅ sec Θ<br />

⋅ cos Θ<br />

B<br />

A<br />

A<br />

A<br />

Equation 22.5-39<br />

B<br />

A<br />

Equation 22.5-40<br />

B<br />

A<br />

⎞<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

T<br />

Equation 22.5-41<br />

DX_TO_DE takes the PV of point (b) with respect to point (a), the origins of<br />

frames (A) and (B) respectively, and returns the Euler rate of (B) with<br />

respect to (A) assuming that the Euler roll angle is zero.<br />

DX_TO_DE<br />

Θ &<br />

B<br />

A<br />

B A A<br />

DE A A<br />

( E& , P , V ) ≡ ϕ ( P , V )<br />

: =<br />

A<br />

ϕ<br />

P<br />

Φ&<br />

1<br />

2<br />

a,<br />

b<br />

b<br />

B<br />

A<br />

b<br />

: =<br />

⎛ P<br />

⋅ ⎜<br />

⎝ P<br />

ZA<br />

b<br />

hA<br />

b<br />

0<br />

⎞<br />

⎟<br />

⎠<br />

−<br />

V<br />

hA 2 B<br />

( Pb ) ⋅ ΨA<br />

: = ϕ2<br />

&<br />

DX<br />

ZA hA<br />

b ⋅ Pb<br />

4<br />

Pa<br />

, b<br />

b<br />

b<br />

Equation 22.5-42<br />

Equation 22.5-43<br />

Equation 22.5-44<br />

Equation 22.5-45

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