Cockpit and Avionics
The standard MD-11 is equipped with an advanced, two-person cockpit. Figure 2(a) shows the electronic displays on the main panel, the glareshield .ight control panel, and the automated systems management controls and displays on the overhead panel. Figure 2(b) shows more detail on the overhead panel. Of particular interest for this .ight test are the MD-11 dual longitudinal stability augmentation systems (LSAS), the dual yaw dampers, the fuel system control panel, the hydraulic system control panel, and the alternate full-authority digital engine control (FADEC) switches. The auto.ight system (AFS) includes autopilot, autothrottle and speed control, stall warning,
(a) Flight deck of the MD-11 .ight deck simulator.
Hydraulic system Yaw damper control panel LSAS switches switches
Alternate FADEC Fuel system
switches control panel
(b) MD-11 cockpit overhead panel. Figure 2. MD-11 cockpit and avionics.
turn coordination, .ap limiting, windshear detection, and other features. A .ight management system integrates autopilot, autothrottle, navigation, and autoland functions. The crew communicates with the .ight management system using the three multifunction control and display units (MCDUs) on the center pedestal.
Figure 2(c) shows the AFS crew interface and display. The glareshield .ight control panel (FCP) is the .ight crew’s interface into the auto.ight modes. Beginning from the top left, the .gure shows a pushbutton to toggle between indicated airspeed (IAS) and Mach, and a speed select knob that normally commands the autothrottle speed or Mach hold. For lateral control, a Heading/Track (HDG/TRK) knob (selectable to integer degree values) is used to select the desired heading or track. The HDG/TRK button toggles between heading mode and track mode. Bank angle may be limited with the knob surrounding the HDG/TRK knob. In the center of the panel are the AFS override switches that allow selection of either of the two autopilots. The Autoflight button can engage the AFS. The approach and land (APPR/LAND) button can arm a coupled approach mode. The altitude capture window has a toggle switch to select feet or meters. On the right is a pitch thumbwheel for commanding .ightpath angle (FPA),
Coupled approach Autoflight autoland button button Flight control panel
Speed
Heading/ AFS override
knob Pitch
track knob paddle thumbwheel switches
Primary flight display Navigation display
bar marker bar
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(c) Auto.ight system crew interface and displays, autopilot engaged in TRACK and FPA mode, autothrottle not engaged. Current track is 063° , commanded track is 070° . Current .ightpath is 0° , commanded .ightpath is –2.5° .
Figure 2. Concluded.
selectable to a tenth of a degree, or vertical speed (V/S), selectable to 100 ft/min. The V/S–FPA button toggles between the vertical speed mode and .ightpath angle mode. The pitch thumbwheel and HDG/TRK knobs have mechanical functions that, if moved rapidly, quickly engage a higher gear ratio.
The primary .ight display (PFD) includes annunciation of selected modes at the top. On the left, the Speed window indicates whether the commanded speed is in knots (IAS) or Mach; in this case, the .gure shows a commanded IAS of 190 kn. In the center, the Roll window is the commanded lateral mode (showing a track of 070° in this case). On the right, the Pitch window indicates the active pitch mode (shown here as FPA) and the commanded altitude (shown at 3000 ft). On the PFD, the .ightpath marker shows the current .ightpath, while the .ightpath command bar displays what has been commanded. If the V/S mode had been selected, the commanded V/S bug would be displayed on the V/S scale on the right of the PFD. Track command bars are also shown on the PFD, along with a bug on the compass at the bottom. The IAS command is shown as a bug on the airspeed scale on the left of the PFD.
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本文链接地址：Development and Flight Test of an Emergency Flight Control System Using Only Engine Thrust on an MD-11 Transport Airplane(11)
