On Thu, 2003-10-23 at 00:15, David Masten wrote:
> I had figured that to yaw left decrease left engine thrust and increase
> right engine thrust simultaneously. Since opposite motors generate
> torque in the same direction this should mean no (little) torque change.
Neither the strategy you propose nor John's strategy eliminate
cross-axis coupling. Both strategies still produces coupling to the roll
axis when maneuvering in both pitch and yaw at the same time. Neither
addresses the coupling that occurs when rolling is combined with
manuevers in those axes. However, I think John is right about being able
to mostly ignore the cross-coupling. If you keep the engine cants small
and make only small control actions, then whatever coupling occurs
should be simply damped out by the control system, assuming that it is
fast and well-damped.
If precision pointing is required, as for a sounding rocket carrying a
telescope or earth-sciences package, then this will not be enough, of
course.
-p
_______________________________________________
ERPS-list mailing list
[EMAIL PROTECTED]
http://lists.erps.org/mailman/listinfo/erps-list
