Meggitt 60-2, Руководство по эксплуатации

Страница: 18 / 62

2nd Ed: Nov 01, 01 3-3
SYS 60-2 POH
3.0 Autopilot Overview
3.1 System 60-2 Programmer/Annunciator
Fig. 3-1. System 60-2 Programmer/Annunciator
The System 60-2 Programmer/Annunciator is a rate based autopilot that
controls the roll and pitch axis of the aircraft. The autopilot's main func-
tion is to convert pilot commands to logic signals for both the roll and
pitch computers. As the pilot enters the desired mode by pressing the
mode selector switch, the computer acknowledges the selection by illu-
minating that annunciator.
The Roll Computer receives signal inputs from the turn coordinator,
Directional Gyro or optional Horizontal Situation Indicator (HSI), Very High
Frequency Omnidirectional Radio Range (VOR) / Localizer (LOC), Long
Range Navigation (LORAN) and the Global Positioning System (GPS)
navigation receivers. It then computes roll servo commands for stabili-
zation, turns, radio intercepts, and tracking.
The Pitch Computer receives signal inputs from the altitude pressure
transducer, internal accelerometer, glideslope deviation indicator, and
off warning flag contained in the glideslope receiver. The pitch system
provides vertical speed control and altitude hold, as well as automatic/
manual glideslope capture.
Vertical speed reference is provided by the barometric pressure trans-
ducer, while automatic and manual pitch trim sensing is provided by the
pitch servo. Drive for the elevator trim servo is provided by the pitch
computer. All modes use the transducer signal for a VS or ALT reference.