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

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

_ _<br />

A<br />

A<br />

XB<br />

a,<br />

p<br />

YB<br />

a,<br />

p<br />

: =<br />

: =<br />

V&<br />

V&<br />

XB<br />

a,<br />

b<br />

YB<br />

a,<br />

b<br />

+ ω<br />

+ ω<br />

YB<br />

A,<br />

B<br />

ZB<br />

A,<br />

B<br />

⋅ V<br />

⋅ V<br />

ZB<br />

a,<br />

b<br />

XB<br />

a,<br />

b<br />

− ω<br />

− ω<br />

ZB<br />

A,<br />

B<br />

XB<br />

A,<br />

B<br />

22.5-4<br />

⋅ V<br />

⋅ V<br />

YB<br />

a,<br />

b<br />

ZB<br />

a,<br />

b<br />

+ P<br />

+ P<br />

B<br />

b,<br />

p<br />

B<br />

b,<br />

p<br />

⎛<br />

⎜ −<br />

⎜<br />

⎜<br />

⊗ ⎜ ω<br />

⎜<br />

⎜<br />

⎝ ω&<br />

⎛ ω&<br />

⎜<br />

⎜<br />

⎜<br />

⊗ ⎜ −<br />

⎜<br />

⎜<br />

⎝ ω<br />

⎛ ω<br />

⎜<br />

⎜<br />

ZB<br />

ZB XB YB YB XB B ⎜<br />

Aa, p : = V&<br />

a,<br />

b + ωA,<br />

B ⋅ Va,<br />

b − ωA,<br />

B ⋅ Va<br />

, b + Pb,<br />

p ⊗ ⎜ ω&<br />

⎜<br />

⎜<br />

⎝ −<br />

YB 2 ZB<br />

( ω ) − ( ω )<br />

A,<br />

B<br />

XB<br />

A,<br />

B<br />

YB<br />

A,<br />

B<br />

ZB<br />

A,<br />

B<br />

⋅ ω<br />

+ ω<br />

YB<br />

A,<br />

B<br />

XB<br />

A,<br />

B<br />

A,<br />

B<br />

− ω&<br />

⋅ ω<br />

ZB<br />

A,<br />

B<br />

ZB<br />

A,<br />

B<br />

2<br />

⎞<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

Equation 22.5-19<br />

+ ω<br />

XB 2 ZB<br />

( ω ) − ( ω )<br />

A,<br />

B<br />

YB<br />

A,<br />

B<br />

XB<br />

A,<br />

B<br />

XB<br />

A,<br />

B<br />

⋅ ω<br />

XB<br />

A,<br />

B<br />

ZB<br />

A,<br />

B<br />

⋅ ω<br />

A,<br />

B<br />

− ω&<br />

YB<br />

A,<br />

B<br />

XB<br />

A,<br />

B<br />

2<br />

⎞<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

Equation 22.5-20<br />

⋅ ω<br />

+ ω<br />

− ω&<br />

⋅ ω<br />

( ) ( ) ⎟ ⎟⎟⎟⎟⎟⎟<br />

XB 2 YB 2<br />

ω − ω<br />

A,<br />

B<br />

If point (p) is lies on X B , as is common in missile kinematics,<br />

XB<br />

A : = V&<br />

a,<br />

p<br />

YB<br />

a,<br />

p<br />

XB<br />

a,<br />

b<br />

YB<br />

a,<br />

b<br />

+ ω<br />

YB<br />

A,<br />

B<br />

ZB<br />

A,<br />

B<br />

⋅ V<br />

ZB<br />

a,<br />

b<br />

XB<br />

a,<br />

b<br />

− ω<br />

ZB<br />

A,<br />

B<br />

XB<br />

A,<br />

B<br />

⋅ V<br />

YB<br />

a,<br />

b<br />

ZB<br />

a,<br />

b<br />

− P<br />

XB<br />

b,<br />

p<br />

⋅<br />

XB<br />

b,<br />

p<br />

ZB<br />

A,<br />

B<br />

YB<br />

A,<br />

B<br />

YB<br />

A,<br />

B<br />

ZB<br />

A,<br />

B<br />

A,<br />

B<br />

⎞<br />

⎠<br />

Equation 22.5-21<br />

YB 2 ZB 2<br />

( ω ) + ( ) ⎟<br />

⎞<br />

A,<br />

B A,<br />

B<br />

⎠<br />

⎜<br />

⎛ ω<br />

⎝<br />

Equation 22.5-22<br />

ZB XB YB<br />

( ω + ω ⋅ )<br />

A : = V&<br />

+ ω ⋅ V − ω ⋅ V + P ⋅ &<br />

ω<br />

ZB<br />

a,<br />

p<br />

ZB<br />

a,<br />

b<br />

XB<br />

A,<br />

B<br />

YB<br />

a,<br />

b<br />

YB<br />

A,<br />

B<br />

XB<br />

a,<br />

b<br />

XB<br />

b,<br />

p<br />

A,<br />

B<br />

A,<br />

B<br />

A,<br />

B<br />

Equation 22.5-23<br />

YB XB ZB<br />

( ω − ω ⋅ )<br />

A : = V&<br />

+ ω ⋅ V − ω ⋅ V − P ⋅ &<br />

ω<br />

22.5.5 Euler to Angular Rates<br />

A,<br />

B<br />

A,<br />

B<br />

A,<br />

B<br />

Equation 22.5-24<br />

DE_TO_W takes a YPR Euler triplet defining the orientation and angular<br />

rate of frame (B) with respect to frame (A), and its time rate of change, and<br />

returns the angular rate vector.

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