12.13.Vhf omnidirectional range (vor) в737.
Подробно рассматривается в [4] рекомендуемой литературы.
Purpose
The VHF omnidirectional ranging (VOR) system is a navigation aid that gives magnetic bearing data from a VOR ground station to the airplane.
The VOR ground stations transmit signals that give magnetic radial information from 000 degrees to 359 degrees. All VOR stations reference the 000 degree to magnetic north.
Abbreviations and Acronyms
ACP - audio control panel
DEU - display electronic unit
DFCS - digital flight control system
DME - distance measurement equipment
EFIS - electronic flight instrument system
FCC - flight control computer
FDAU - flight data acquisition unit
FMC - flight management computer
HSI - horizontal situation indicator
ILS - instrument landing system
LCD - liquid crystal display
MCP - mode control panel
NAV - navigation
NCD - no computed data
PWR - power
RDMI - radio direction magnetic indicator
REU - remote electronic unit
RF - radio frequency
RMI - radio magnetic indicator
VOR - VHF omnidirectional ranging.
General description General
The VOR system has two VOR/marker beacon (VOR/MB) receivers. The receivers have VOR and marker beacon functions. This section covers only the VOR operation of the VOR/MB receivers.
Description
The navigation (NAV) control panels give manual tune inputs to the VOR/MB receivers. There are two NAV control panels, one for the captain and one for the first officer.
RF signals from the VOR/LOC antenna go through power dividers, then to the VOR/MB receivers. The VOR/MB receivers use the RF signals to calculate station bearing and decode the morse code station identifier signal and station audio. The receivers send VOR bearing to the remote magnetic indicator (RMI). You can select the RMI bearing pointers to show VOR or ADF station bearing with the RMI bearing pointer selectors.
The receivers send VOR bearing data to the display electronic units (DEU) for display. The NAV select switch lets the crew select VOR/MB receiver 1 or VOR/MB receiver 2 as the source for the captain and first officer displays.
The receivers send station audio and morse code station identifier signals to the remote electronic unit (REU).
The receiver sends VOR bearing data to the FCCs for the DFCS VOR/LOC mode of operation. The bearing data also goes to the FMCS as a radio navigation aid for present position calculations.
Vor system - flight compartment component location General
These are the components in the flight compartment that interface with the VOR system:
Captain’s primary and secondary EFIS displays
Left and right EFIS control panels
First officer’s primary and secondary EFIS displays
Captain’s and first officer’s NAV control panel
Captain’s and first officer’s audio control panel
VHF NAV transfer switch.
VOR SYSTEM - ANTENNA AND ELECTRONIC EQUIPMENT COMPARTMENT COMPONENT LOCATIONS
General
The VOR/LOC antenna is at the top of the vertical stabilizer. VOR/MB receiver 1 is on the E1-2 shelf and VOR/MB receiver 2 is on the E1-4 shelf.
VOR SYSTEM - POWER AND ANALOG INTERFACE
General
These are the components that have power and analog interface with the VOR system:
Circuit breakers
VOR antenna
Navigation control panels
Card files
Remote electronics unit.
Circuit breakers
The VOR circuit breakers supply 115v ac power for receiver operation. VOR/MB receiver 1 gets power from the ac standby bus, section 1 and VOR/MB receiver 2 gets power from the ac transfer bus 2, section 2.
The NAV control panel circuit breakers supply 115v ac for control panel operation. The captain control panel gets power from the ac standby bus and the first officer control panel gets power from the ac transfer bus 2.
The NAV control panels receive 28v dc for control panel monitor operation and for the ILS 28v dc ILS tuned output when you tune an ILS frequency. The captain control panel receives 28v dc from the 28v dc standby bus, NAV sensor DC-1 circuit breaker. The first officer control panel receives 28v dc from the 28v dc bus 2, NAV sensor DC-2 circuit breaker.