Moog Crossbow VG700MB Series - Manual (Page 24)

VG700M User’s Manual
Page 18 Doc.# 7430-0280-01 Rev. F
3.9 Adaptive-T Algorithm (installed at Crossbow factory)
There is no one optimal erection rate for all environments. A high erection
rate is better when you are closer to a static situation, and a low erection
rate is better when you are in a dynamic situation. Crossbow has developed
an algorithm to automatically switch the erection rate (the T parameter)
based on the dynamics measured by the DMU. This algorithm is referred to
as adaptive-T and is implemented as default at the factory. An overview of
the algorithm is presented below; note that the user still has a certain
amount of control over the adaptive-T function.
When the unit is powered up and initialized, and the adaptive-T-Setting
feature has been chosen, the unit will default to adaptively tune the
T-Setting between a maximum T-Setting of 20, and a minimum T-Setting
of 1. The user has the ability to change the effect of the adaptive T function
through the T-Setting command as follows:
The user selected T-Setting sets the upper end of the adaptive T algorithm,
which then tunes the T-Setting between a T-Setting of 1 and the chosen T-
Setting by scaling the setting based on sensed accelerations and the yaw
gyro measure of the turn rate. For instance, during large accelerations
(high-G maneuvers) or fast turns, the T-setting will be set to a value of 1,
and during low accelerations and straight motion the T-Setting will be set to
the value chosen by the user. In this way the T-Setting chosen controls the
maximum T-Setting that the algorithm will use. While the adaptive-T
algorithm offers a hands-off approach to the T-Setting problem, some
control over the algorithm is still allowed. The user should still evaluate the
performance of the algorithm in each application to achieve the best results.