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AUTOPILOT SYSTEM
DESCRIPTION
The Flight Control system is an integrated 3-axis autopilot and flight
director, containing automatic elevator trim control. The system is
configured for dual flight directors and is certified for ILS Category 2
operations.
The system consists of the following:
Two FGC-3000 Flight Guidance Computer Module (2)
One FGP-3000 Flight Guidance Panel (1)
SVO-85C Primary Servo (2)
SMT-86C Servo Mount (2)
SVO-85B Primary Servo (1)
SMT-86B Servo Mount (1)
FGS MODES
Flight Guidance Mode Selection
The primary means of selecting and deselecting flight guidance modes
is by pressing the appropriate button on the FGP. pressing an FGP
button when the mode is not selected will select the mode. A
subsequent press of the FGP button deselects the mode. The FGS
defaults to the basic lateral and vertical flight guidance modes when no
modes are selected by the FGP.
10 Sep 2006
Section VII
Systems
VII-22-1
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Summary of Contents for Gulfstream G150
- Page 1 Section VII Systems AUTOPILOT SYSTEM DESCRIPTION The Flight Control system is an integrated 3-axis autopilot and flight director, containing automatic elevator trim control. The system is configured for dual flight directors and is certified for ILS Category 2 operations. The system consists of the following: Two FGC-3000 Flight Guidance Computer Module (2) One FGP-3000 Flight Guidance Panel (1) SVO-85C Primary Servo (2)
- Page 2 Section VII Systems LATERAL MODES Modes Activated by Control Functions Roll Hold (Basic) - - - - Heading Hold, Roll Hold Heading Select Heading Select, Lateral Navigation FMS, Localizer, VOR Approach APPR FMS, Localizer, VOR Back Course Localizer Go Around Go Around GA (Control Wheel) Heading Hold...
- Page 3 Section VII Systems Navigation Mode (NAV) Navigation mode is selected by pressing the NAV button on the FGP. When in navigation mode, the system generates commands to capture and track the selected lateral navigation course (FMS, Localizer, and VOR). Approach Mode (Lateral) Approach mode is selected by pressing the APPR button on the FGP.
- Page 4 Section VII Systems VERTICAL MODES Modes Activated by Control Functions Pitch Hold - - - - Pitch Hold (Basic) Altitude Hold Altitude Hold (Pressure Altitude) Altitude Preselect - - - - Altitude Preselect (Baro Altitude) Vertical Speed Vertical Speed (fpm) Flight Level IAS, Mach Change...
- Page 5 Section VII Systems Altitude Hold Mode (ALT) Altitude hold mode is selected by pressing the ALT button on the FGP. Additionally, altitude hold mode is automatically selected after altitude capture has occurred and the aircraft has stabilized at the preselected altitude.
- Page 6 Section VII Systems Approach Mode (Vertical) Approach mode is selected by pressing the APPR button on the FGP. The approach mode arms when selected and the system generates commands to capture and track vertical guidance for precision approaches (glideslope or GPS when approved) when the lateral approach mode is in the track state and the vertical capture requirements are met.
- Page 7 Section VII Systems Malfunction Protection The flight control system uses a multi-layered response to failures which may occurs within the system and data from external sensors. Malfunction protection and response are provided by a dual channel main processor (Level II verified) and I/O processor (Level I verified) architecture.
- Page 8 Section VII Systems Flight Guidance Data Failures When there is a failure detected in any sensor data used in the flight guidance computations, the system internally reverts to the basic mode for the affected axis, pitch attitude hold for vertical modes and roll attitude hold for lateral modes.
- Page 9 Section VII Systems Servo Control Failures The dual channel analog servo control architecture provides fully fail passive response to failures occurring within the servo control function. The pilot's flight director commands are computed in one FGC-3000 module and the copilot's flight director commands are computed in the other module.
- Page 10 Section VII Systems AUTOPILOT CONTROLS The FGP-3000 flight guidance panel (Figure 7-22-1, page VII-22-15) is a single unit that controls two independent flight guidance systems using the following controls: CRS knob (2) - Provides control of the pilot and copilot selected courses.
- Page 11 Section VII Systems Vertical Speed/Pitch Wheel - Has two separate functions. If vertical speed mode is active, this wheel is used to change the vertical speed reference proportionally to the rotation angle. If vertical speed mode is not active, movement of this wheel deselects any vertical mode that may be active (except glideslope capture) and selects pitch mode.
- Page 12 Section VII Systems YD button - Engages or disengages the yaw damper. Manual engagement/disengagement of the yaw damper is completely independent of autopilot engagement. CPL button - Controls the routing of flight guidance commands to the autopilot and flight directors. The coupled side is indicated by illumination of the appropriate arrow on the PFD AP display.
- Page 13 Section VII Systems 1/2 BANK button - Allows the pilot to override the FCS automatic transitions to/from half bank mode. Half bank limits the maximum command bank angle to 12.5°. Half bank is indicated by a white 1/2 BNK annunciation on the PFD. Selection of half bank is inhibited when lateral go around is active by onside localizer/azimuth capture/track, or by onside FMS navigation capture/track.
- Page 14 Section VII Systems FLC button - Selects/deselects flight level change mode. In FLC mode, desired airspeed is synchronized to the aircraft's current speed at the time of mode selection. This speed can then be slewed up/down using the SPEED knob; turning the knob increases or decreased speed setting in FLC mode.
- Page 15 Section VII Systems Figure 7-22-1. FGP-3000 Flight Control Panel 10 Sep 2006 VII-22-15...
- Page 16 Section VII Systems Figure 7-22-2. Autopilot Controls 10 Sep 2006 VII-22-16...
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