guidance, flight mechanics and trajectory optimization

endezvous. Finally, a comparison between the- amount of fuel used for the
maneuver selected and the theoretical minimum amount as determined by an
optimization process, such as discussed in Section 2.1b.l should be performed
to determine if the fuel savings is significant enough to Warrant investi-
gation of an approximate optimization technique.
A general block diagram
the following sketch.
I I
1 SENSORS 1 OF
/
STATE
-__- --------------_-
I DYNAMICS k
of the rendezvous guidance process is shown in
_ STEERING
7,$C$JATIONS:-
In some of the rendezvous guidance schemes discussed, as for example
the impulsive technique in Section 2.2.3, the interface between the determi-
nation of the required velocity and the steering equations was notdiscussed.
In these cases, the required velocity can be used to generate a reference
trajectory and the methods of the Monograph on boost guidance Reference (2.23)
used to define the steering commands. The guidance and steering equation
blocks of the sketch can be represented in more detail as
L-t-
ESTIMATE
OF
STATE
(REF 1.1)
t
I I
ESTIMATE
OF
I ----P--m
STATE 7 sENsoRS
(REF 1.1) I-
I
85
DYNAMICS e