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庞巴迪CRJ200公务机机组操作手册 Bombardier CRJ-自动飞行控制系统(9)

时间:2011-11-17 10:49来源:蓝天飞行翻译 作者:公务机 点击:
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E. Vertical Mode of Operation
(1) PitchMode
When pitchmodeis selected, thepitch reference(pitchcommand on theprimary flight display) is set to the current pitch angle. Pitch mode generates commands to maintain the pitch reference value.
The pitch reference value can be changed using the VS pitch wheel. Rotation of the VS pitch wheel will change the pitch reference by 1/2 degree per click. The pitch reference is reset to the current pitch attitude upon either autopilot engagement, transferring to pitch mode, or synchronization.
When the preselected altitude is captured, rotating the VS pitch wheel also rearms thealtitudepreselect mode.
When capturing or tracking a preselected altitude, a new preselected altitude must be chosen prior to the selection of pitch mode, to avoid an immediate recapture of the existing preselected altitude.
Flight Crew Operating Manual  MASTER 
CSP A-
013 


 AUTOMATIC FLIGHT CONTROL SYSTEM  Vol. 1  03-
20-
13 

Flight Control and Guidance  REV 56, Jan 31/03 

Pitch mode is automatically selected when no other vertical mode is active, and the flight director is on. Rotating the VS pitch wheel on the flight control panel will manually select pitch mode when the flight director is on, unless in glideslope capture or VS mode. Pitch mode is cleared by the selection of a vertical hold mode, or by a vertical mode capture.
Pitch mode is annunciated with a green PTCH message in the vertical capture field on the primary flight display.
(2) VerticalTake-OffMode
Vertical take-off mode generates a 15 degree pitch-up command. Loss of an engine changes the pitch-up command to 10 degrees.
Selecting vertical mode turns on both flight directors, disengages the autopilot, clears all other vertical modes and switches the flight guidance commands to a dual independent configuration. Lateral and vertical take-off mode selections are coincident.
When take-off causes an autopilot disengagement, the resultant warning may be cancelled by another push of a TOGA switch, or by pushing the AP disconnect switch.
Vertical take-off mode is selected by pushing one of the thrust lever-mounted TOGA switches while on the ground. Vertical take-off mode is cleared by engaging the autopilot, by selecting , or by the selection or capture of another active mode.
Vertical take-off mode is annunciated with a green TO message in the vertical capturefield on theprimary flight display.
(3) AltitudePreselectMode
Altitude preselect mode generates commands to capture and track preselected altitude. The barometric preselected altitude is displayed on the primary flight display, and controlled via the ALT knob on the flight control panel.
Altitude preselect mode is armed upon selection. The capture point is a function of closure rate, with the capture point moving away from the preselected altitude for high closure rates.
 
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