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

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Appendix D / Point Mass Dynamics<br />

_ _<br />

I<br />

b<br />

I<br />

R<br />

17-7<br />

R R R<br />

( Pa,<br />

b + ωI,<br />

R Pa,<br />

b )<br />

V : = T ⋅ & ×<br />

Equation 17.4-2<br />

Expressing the absolute velocity in terms of its components with respect to<br />

the rotating frame,<br />

R<br />

a,<br />

b<br />

R<br />

a,<br />

b<br />

R<br />

I,<br />

R<br />

V : = P + ω ×<br />

&<br />

The individual velocity components in the rotating frame (R) are,<br />

XR<br />

a,<br />

b<br />

XR<br />

a,<br />

b<br />

YR<br />

I,<br />

R<br />

ZR<br />

a,<br />

b<br />

P<br />

R<br />

a,<br />

b<br />

ZR<br />

I,<br />

R<br />

V : = P + ω ⋅ P − ω ⋅ P<br />

&<br />

YR<br />

a,<br />

b<br />

YR<br />

a,<br />

b<br />

ZR<br />

I,<br />

R<br />

XR<br />

a,<br />

b<br />

XR<br />

I,<br />

R<br />

V : = P + ω ⋅ P − ω ⋅P<br />

&<br />

ZR<br />

a,<br />

b<br />

ZR<br />

a,<br />

b<br />

XR<br />

I,<br />

R<br />

YR<br />

a,<br />

b<br />

YR<br />

I,<br />

R<br />

V : = P + ω ⋅ P − ω ⋅P<br />

&<br />

YR<br />

a,<br />

b<br />

ZR<br />

a,<br />

b<br />

XR<br />

a,<br />

b<br />

Equation 17.4-3<br />

Equation 17.4-4<br />

Equation 17.4-5<br />

Equation 17.4-6<br />

Replacing the body rates with the time rate of change of the Euler angles,<br />

P&<br />

P&<br />

P&<br />

XR<br />

a,<br />

b<br />

YR<br />

a,<br />

b<br />

ZR<br />

a,<br />

b<br />

+ Ψ&<br />

R<br />

I<br />

+ Ψ&<br />

+ Ψ&<br />

R<br />

I<br />

R<br />

I<br />

⋅<br />

⋅<br />

⋅<br />

ZR R YR R R R YR R ZR R<br />

( P ⋅ sΦ<br />

− P ⋅ cΦ<br />

) ⋅ cΘ<br />

+ Θ&<br />

⋅ ( P ⋅ sΦ<br />

+ P ⋅ cΦ<br />

)<br />

a,<br />

b<br />

I<br />

a,<br />

b<br />

V<br />

I<br />

XR<br />

a,<br />

b<br />

: =<br />

I<br />

I<br />

a,<br />

b<br />

I<br />

a,<br />

b<br />

Equation 17.4-7<br />

XR R R ZR R R XR R R ZR<br />

( P ⋅ cΦ<br />

⋅ cΘ<br />

+ P ⋅ sΘ<br />

) − Θ&<br />

⋅ P ⋅ sΦ<br />

+ Φ&<br />

⋅ P<br />

a,<br />

b<br />

I<br />

I<br />

V<br />

YR<br />

a,<br />

b<br />

a,<br />

b<br />

: =<br />

I<br />

I<br />

a,<br />

b<br />

I<br />

I<br />

I<br />

a,<br />

b<br />

Equation 17.4-8<br />

YR R XR R R R XR R R YR<br />

( P ⋅ sΘ<br />

− P ⋅ sΦ<br />

⋅ cΘ<br />

) − Θ&<br />

⋅ P ⋅ cΦ<br />

+ Φ&<br />

⋅ P<br />

a,<br />

b<br />

I<br />

a,<br />

b<br />

V<br />

ZR<br />

a,<br />

b<br />

I<br />

: =<br />

I<br />

I<br />

a,<br />

b<br />

I<br />

I<br />

a,<br />

b<br />

Equation 17.4-9

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