1、AEROSPACE RECOMMENDED PRACTICEARP4102/12REV.AIssued 1990-03Revised 2000-06Superseding ARP4102/12Airborne Landing Guidance System for Transport Aircraft1. SCOPE:This document specifies requirements for an Airborne Landing Guidance System (ALGS) electronic device. This equipment shall derive relative
2、aircraft position and situation information for flight along precision three-dimensional paths within the appropriate coverage area. The precision three-dimensional path may be an ILS straight-in look-alike path or a complex, curved path. The requirements are applicable to electronic devices capable
3、 of receiving signals or other information from one or more sources, including but not limited to ILS, MLS, GNSS, or IRU inputs.2. REFERENCES:2.1 Documentation:This annex should be used in conjunction with the ARP4102 Core Document. The following documents may also be applicable:SAE S-7 ARP4101, Fli
4、ght Deck Layout and FacilitiesSAE S-7 ARP4102/4, Flight Deck Alerting SystemsSAE S-7 ARP4102/6 Communication and Navigation EquipmentSAE S-7 ARP4102/9, Flight Management System (FMS)SAE S-7 ARP4103, Instrument and Flight Deck LightingSAE S-7 ARP4105, Nomenclature and Abbreviation for Use on the Flig
5、ht Deck2.2 Definitions:ALGS ELECTRONIC DEVICE: Airborne electronic equipment that receives radio signals or other information and processes these inputs to attain an accurate position estimate of the airplane and provides lateral and vertical precision path deviation information as an output signal.
6、 The LGS electronic device precision path shall at a minimum provide an ILS straight-in look-alike path but may also be able to provide information for complex, curved paths.SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engin
7、eering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may
8、be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2008 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying
9、, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org Reaffirmed 2008-06SAE ARP4102/12 Revision A-
10、 2 -3. OPERATIONAL REQUIREMENTS:3.1 General Requirements:Manually Controlled and Automatic Flight: The ALGS shall be capable of providing information that allows appropriate guidance for both manually and automatically controlled flight.Crew Workload: During critical phases of an approach or departu
11、re, the use of ALGS derived guidance shall not increase crew workload above that required using other acceptable guidance sources. During any phase of flight, the workload should not interfere with normal crew vigilance required for safety.Flight Deck Integration: The ALGS related airborne equipment
12、, installed in the flight deck, shall meet the requirements established by flight deck standards for instrumentation and controls, including human factor considerations.Information and Guidance Integration: ALGS derived guidance shall be smooth and ALGS situation information shall remain coherent wh
13、en transitioning from enroute navigation to ALGS signals and throughout the entire approach while within the appropriate ALGS signal coverage.Display and control of barometric altitude/height as the basic system of altimetry shall not be affectedby the availability of ALGS derived altitude. ALGS der
14、ived altitude may be used for guidance and control along the portion of the final approach course route in which the final descent has been programmed.3.2 Functional Requirements:3.2.1 Types of Flight Paths: The ALGS shall be capable of providing information that allows appropriate guidance for stra
15、ight-in precision (ILS-LOOK-ALIKE) approaches, landings, and missed approaches.Where the implemented guidance system permits, the ALGS shall be capable of providing information that allows appropriate guidance for the following phases of flight: STARsThree-dimensional multiple-segment curved path ap
16、proachesComputed centerline aproachesLanding rollMissed approachesDuring the execution of a missed approach, the ALGS system shall be capable of providing information that allows appropriate guidance and path information from any point on the approach path to the runway threshold.SAE ARP4102/12 Revi
17、sion A- 3 -3.2.1 (Continued):If the ALGS uses multiple sensors for different sections of the approach and missed approach, the system should utilize appropriate navigation sources for each section.Where the implemented guidance system permits, the ALGS may also be capable of providing information th
18、at allows appropriate guidance for the following phases of flight:Takeoff roll/initial climbDepartures/SIDs3.2.2 Airborne Landing Guidance System Electronic Device: The final approach course, the glide path, and the missed approach course may be automatically programmed or manually selected. In eith
19、er mode, the final approach course and the initial segment of the missed approach course shall be able to be referred to both true and magnetic North, whichever is required for the instrument procedure. The glide path of the final approach course shall be a constant, earth-referenced descent.If the
20、ALGS is in a manual mode, the crew shall select values for the final approach course, the glide path (if applicable), and the missed approach course. A means shall be provided to prevent selection of values outside of acceptable limits.If the final approach course, the glide path angle, and/or the m
21、issed approach course selected in the receiver are different from the values received through a data link, an alert shall be presented.3.2.3 Database Requirements: The NAV data base shall contain sufficient data to completely define the approach procedure(s) that shall be used. The crew should not b
22、e required to insert additional navigation data to conduct an approach unless modifications are required by air traffic control.It shall be possible to verify the data used to define the approach and the landing runway.Verification of the data shall not affect navigation and guidance.For an approach
23、 on a given runway, once the aircraft has passed the final approach fix, the final approach path shall not be modifiable by the crew, and, in this case, if the crew attempts to modify the path, the crew shall be clearly informed of the reason why his attempt has failed. Before the final approach fix
24、, the approach path may be modified within applicable ATC constraints.3.2.4 Safeguards:Tolerance to Electronic Transients: Transients or loss of electrical power usual to normal operations (including generator or bus transfer) shall not erase or alter the flight plan route, display configuration, or
25、 operation modes.SAE ARP4102/12 Revision A- 4 -3.2.5 System Status and Warning:Signal Reception: When a flight deck alerting system is installed, an indication shall be provided to the crew when a ALGS component required for the approach is not being received by the airborne system.Airborne Equipmen
26、t Self-Tests: All self-tests shall be performed automatically. Only test faults should be annunciated.Signal Quality: The ALGS shall continuously monitor and perform checks on signal quality of sensor inputs used to compute ALGS path guidance.4. PANELS:Not used.5. CONTROLS:5.1 Receiver Controls:ALGS
27、 controls should be integrated with or grouped close to other navigation aid controls.Track and Glide Path Angle Selection: An ALGS control panel may provide means for selecting a magnetic track and an earth-reference descent angle for the final approach, a magnetic track away from the missed approa
28、ch. Selectable track shall be clearly annunciated at all times.Glide path angles shall be capable of being displayed when required by the crew.5.2 ALGS Controls and Keyboard Requirements:Manual Tuning: A means to manually select the desired approach facility shall be provided.Automatic Tuning: Autom
29、atic tuning is optional. A means of indicating the facility in use shall be provided. A manual override of automatic tuning shall be provided.Sensor Selection and Verification: A means shall be provided to readily select the appropriate landing system and to easily verify which landing system is sel
30、ected.The selected/tuned approach mode shall be clearly annunciated.SAE ARP4102/12 Revision A- 5 -6. DISPLAYS:Display Formats: Display formats shall provide situation information and guidance for path tracking. The situation information shall allow the crew to assess lateral and vertical path deviation, along track distance to touchdown along the approach paths, and, if a map display is available, the position of the aircraft with respect to the landing runway.PREPARED UNDER THE JURISDICTION OFSAE COMMITTEE S-7, FLIGHT DECK & HANDLING QUALITIESSTANDARDS FOR TRANSPORT AIRCRAFT
