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

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

_ _<br />

ω&<br />

ω&<br />

YB<br />

A,<br />

B<br />

ZB<br />

A,<br />

B<br />

: =<br />

: =<br />

ω&<br />

⎛<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

⎛<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

XB<br />

A,<br />

B<br />

Ψ&<br />

&<br />

Ψ&<br />

&<br />

B<br />

A<br />

B<br />

A<br />

D2E_TO_DW<br />

B<br />

A<br />

B<br />

A<br />

22.5-6<br />

B B B B<br />

( E& & , E&<br />

, E , ω& )<br />

A<br />

B<br />

A<br />

A<br />

A<br />

B<br />

A<br />

A,<br />

B<br />

: = Φ&<br />

& − Ψ&<br />

& ⋅ sin Θ − Ψ&<br />

⋅ Θ&<br />

⋅ cos Θ<br />

Θ&<br />

&<br />

⋅ cos Θ<br />

⋅ cos Θ<br />

If the roll angle is zero,<br />

ω&<br />

B<br />

A,<br />

B<br />

: =<br />

B<br />

A<br />

B<br />

A<br />

B<br />

A<br />

− Θ&<br />

&<br />

⎛<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

+ Ψ&<br />

−<br />

−<br />

B<br />

A<br />

− Ψ&<br />

&<br />

Ψ&<br />

&<br />

22.5.8 Angular to Euler Accelerations<br />

B<br />

A<br />

⋅ Φ&<br />

⋅ cos Θ<br />

B<br />

A<br />

⎞<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

Equation 22.5-31<br />

B<br />

A<br />

Equation 22.5-32<br />

⎛<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

cos Φ<br />

⎟ ( ) ⎟⎟<br />

⋅<br />

Φ&<br />

B<br />

+ Ψ&<br />

B B B<br />

B<br />

⋅ sin Θ ⋅ Θ&<br />

sin Φ<br />

A<br />

B<br />

A<br />

A<br />

B<br />

A<br />

A<br />

( Φ&<br />

B<br />

+ Ψ&<br />

B B<br />

⋅ sin Θ )<br />

− Ψ&<br />

B<br />

A<br />

B<br />

A<br />

A<br />

B<br />

A<br />

⋅ Φ&<br />

⋅ cosΘ<br />

B<br />

A<br />

⋅ sin Θ<br />

B<br />

A<br />

A<br />

B<br />

A<br />

⋅ cos Θ<br />

− Ψ&<br />

Θ&<br />

&<br />

B<br />

A<br />

− Θ&<br />

B<br />

A<br />

B<br />

A<br />

B<br />

A<br />

A<br />

⋅ Θ&<br />

⋅ Ψ&<br />

B<br />

A<br />

B<br />

A<br />

⋅ Θ&<br />

A<br />

B<br />

A<br />

⎞<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

⋅ cosΘ<br />

⋅ sin Θ<br />

T<br />

B<br />

A<br />

A<br />

⎞<br />

⎠<br />

Equation 22.5-33<br />

T<br />

⋅<br />

⎛<br />

⎜<br />

⎜<br />

⎜<br />

⎝<br />

cos Φ<br />

sin Φ<br />

B<br />

A<br />

B<br />

A<br />

⎞<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

Equation 22.5-34<br />

B<br />

A<br />

B<br />

A<br />

⎞<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎟<br />

⎠<br />

Equation 22.5-35<br />

DW_TO_D2E takes an Euler triplet representing the orientation of frame (B)<br />

with respect to frame (A), and its angular velocity and acceleration, and<br />

returns the Euler angle acceleration.<br />

B<br />

A<br />

DW_TO_D2E<br />

B B B B<br />

( E& & , E , ω , ω&<br />

)<br />

A<br />

A<br />

A,<br />

B<br />

A,<br />

B<br />

YB B ZB<br />

B<br />

B<br />

( ω&<br />

⋅ sin Φ + ω ⋅ cos Φ + ϕ ) ⋅ sec<br />

Ψ& & : =<br />

&<br />

Θ<br />

A,<br />

B<br />

A<br />

A,<br />

B<br />

A<br />

1<br />

Equation 22.5-36<br />

A<br />

Equation 22.5-37

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