BOMBARDIER BD-100-1A10, Руководство по эксплуатации

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AUTOMATIC FLIGHT CONTROL SYSTEM
May 06/2005 Flight Crew Operating Manual Volume 2
REV 2 CSP 100-6
04-01-15
FLIGHT DIRECTOR VERTICAL MODES (Cont)
ALTITUDE SELECT (ALTS)
The altitude select mode consists of arm, capture and track states. In the arm state, the FGC monitors aircraft closure rates
towards the target altitude and determines the optimum capture point. The capture state performs calculations for a smooth
acquisition of the target altitude. In the track state, the system maintains the target altitude. There are two possible target
altitudes for ALTS operation:
- Preselect Altitude value – Manually selected by the pilot using the ALT switch on the FGP
- FMS flight plan target altitude provided by the FMS
The ALTS mode will capture and track the altitude that is closest in the direction the aircraft is headed. This mode is auto-
matically selected (no button for manual selection is provided) upon existence of any mode (FD is selected on, or AP is
engaged) except for glideslope capture, vertical go around, altitude hold or VNAV glide path capture, while the FMS alti-
tude is invalid or missing.
ALTS arm is deselected upon occurrence of any of the following:
- Automatic transition to the capture state
- Turning off the FD while the AP is disengaged
- Activation of APPR mode
- Selection of vertical go-around or altitude hold modes
ALTS capture is deselected upon the occurrence of any of the following:
- Automatic transition to the track state
- Turning off the FD while the AP is disengaged
- Selection of any other active vertical mode
- Turning the altitude preselect knob
- If VNAV is deselected, pitch shall be selected as the active mode
Deselecting of ALTS track will occur due to any of the following:
- Turning off the FD while AP is disengaged
- Turning the altitude preselect knob when the VNAV altitude is not the same as preselected altitude being tracked;
Altitude hold will be automatically selected as the active mode
- A change of the FMS flight plan target altitude if the VNAV altitude is target; altitude hold is automatically
selected as the active mode
- If ALTS is tracking the flight plan target altitude and VNAV is deselected, altitude hold shall be the active mode.
- Activation of Vertical APPR Capture/Track states
- Selection of any other active vertical mode
Altitude select mode generates commands to capture and track selected altitude displayed on the PFD. During the altitude
capture maneuver, or after being established on the selected altitude (altitude track), if the selected altitude is changed, the
altitude hold mode is automatically selected. A deselection of vertical navigation mode, while capturing/tracking an FMS
altitude, will also select altitude hold mode. In addition to altitude preselect being set with the altitude preselect knob, a
FMS flight path target altitude can be programmed for use with VNAV. In the VNAV glide path capture mode, capturing
the preselected altitude is prohibited.