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guidance, flight mechanics and trajectory optimization

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F<br />

while Equation (2.5.87B) requires<br />

ioh;) f C#<br />

c bc;, 1 ci<br />

.<br />

h(Xc',, f C‘<br />

Alternately, if the constraint of Equation (2.5.87C) is imposed, then<br />

only P, of the above conditions must hold where p, is some integer less<br />

than six.<br />

These three possibilities by no means exhaust the types of H<br />

matrices that may be used. Flather, they are introduced simply to indicate<br />

the types of physical situations that can be represented by constraints<br />

of the form of Equations (2.5.878) to (2.5.87C). In the following de-<br />

velopment, it is only required that H be some constant matrix with<br />

dimensions less than or equal to & , where h is the number of components<br />

in the state vector K .<br />

As a further simplification, it will be assumed that the symmetric<br />

matrix Q, in the performance index of Equation (2.5.85) can be<br />

expressed as<br />

where @ (+I is the fundamental Mxn matrix solution<br />

134<br />

(2.5.88)<br />

(2.5.89)<br />

(2.5.90)

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