User`s guide

9 Custom Types of Requirements Documents
9-14
The user-selectable climb rate is always a
positive number if the current altitude is
above the target altitude. The actual target
climb rate is the negative of the user
setting.
End of "Altitude Climb Control">
Requirement:: "Altitude Hold"
Altitude hold mode is entered whenever:
|Actual Altitude- Desired Altitude | <
30*Sample Period*(Pilot Climb Rate / 60)
Units:
Actual Altitude - feet
Desired Altitude - feet
Sample Period - seconds
Pilot Climb Rate - feet/minute
Description:
The transition from climb mode to altitude
hold is based on a threshold that is
proportional to the Pilot Climb Rate.
At higher climb rates the transition occurs
sooner to prevent excessive overshoot.
End of "Altitude Hold"
Requirement:: "Autopilot Disable"
Altitude hold control and altitude climb
control are disabled when autopilot enable
is false.
Description:
Both control modes of the autopilot
can be disabled with a pilot setting.