рефераты конспекты курсовые дипломные лекции шпоры

Раздел Информатика
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Abbreviations and Acronyms

Реферат Курсовая Конспект

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Abbreviations and Acronyms

Abbreviations and Acronyms - раздел Информатика, RADIO ALTIMETER SYSTEM – INTRODUCTION · Adi - Attitude Direction Indication · Aid - Aircraft Installed Del...

· ADI - attitude direction indication

· AID - aircraft installed delay

· altm - altimeter

· ant - antenna

· approx - approximately

· ARINC - Aeronautical Radio, Inc.

· BITE - built-in test equipment

· CAPT - captain

· CDS - common display system

· conn - connector

· CP - control panel

· CW - continuous wave

· DEU - display electronics unit

· DH - decision height

· DME - distance measuring equipment

· DU - display unit

· EFIS - electronic flight instrument system

· F - frequency

· FCC - flight control computer

· FDAU - flight data acquisition unit

· FM - frequency modulation

· F/O - first officer

· freq - frequency

· fwd - forward

· gnd - ground

· GPWC - ground proximity warning computer

· ILS - instrument landing system

· LCD - liquid crystal display

· LED - light emitting diode

· LRU - line replaceable unit

· maint - maintenance

· MDA - minimum descent altitude

· mins - minimums

· PFD - primary flight display

· P/N - part number

· RA - radio altimeter

· RA - radio altitude

· rec - receiver

· RF - radio frequency

· rst - reset

· R/T - receiver transmitter

· S/W - software

· sys - system

· T - time

· TCAS - traffic alert and collision avoidance system

· VCO - voltage controlled oscillator

· WXR - weather radar

· xmit - transmit

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RADIO ALTIMETER SYSTEM – INTRODUCTION

RA SYSTEM GENERAL DESCRIPTION General The altitude data and signal validity is sent on two... RA SYSTEM COMPONENT LOCATION... General...

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General
The radio altimeter (RA) system measures the vertical distance from the airplane to the ground. The radio altitude shows in the flight compartment on the display units (DU). The radio altitude is c

General
The radio altimeter system has two receiver/transmitters (R/ Ts). Each R/T has a transmit and a receive antenna. The radio altimeter R/T makes a frequency modulated continuous wave RF signal that i

RA Receiver/Transmitter Outputs
Each FCC uses radio altitude from its on-side RA receiver/ transmitter. The FCCs use radio altitude in the approach control and low altitude flight calculations. The autothrottle uses radi

Operation
These are the three LED status indicators on the front panel: · Red or green LRU STATUS LED shows the receiver/ transmitter operational status. It comes on green when the

EFIS Control Panel
The EFIS control panel controls the radio minimums value and resets the radio minimums alert display to a normal display. The radio minimums shows on the captain and first officer display units. Th

Display Unit
The display unit (DU) shows radio altitude and radio minimums values. The flight crew uses this data during an approach and a landing. Radio altitude shows in white for airplane altitude b

Radio Minimums Alert
A radio minimums alert occurs when the radio altitude of the aircraft is the same as the selected radio mins altitude value from the EFIS control panel. The radio minimums alerts occur separately b

Rising Runway
The rising runway shows in two colors, a magenta stem with a green trapezoid box on the top. The rising runway shows at the bottom of the ADI when these conditions occur: · Radio altitude

Transmit and Receive
The ground causes a reflection of the transmit signal. The receive antenna receives the signal. The RF processor mixes the transmit and receive signals to make a difference frequency. The differenc

Input Program Pins
The system select program pin input sets the system modulation rate and system identification. The modulation rate for the RA 1 system is 145Hz, the RA 2 system is 155Hz. The aircraft inst