1、AEROS PACE RECOMMENDED PRACTICEARP4104/1Issued 1993-06Reaffirmed 2007-07Flight Envelope Awareness/ProtectionFOREWORDChanges in this reaffirm are format/editorial only.1. SCOPE:This annex recommends additional design objectives applicable when control laws or control characteristics are modified for
2、the purpose of Flight Envelope Awareness/Protection. While only manually controlled flight is addressed, it is assumed that Autoflight, Autothrottle, or Autothrust performance is compatible.2. REFERENCES:2.1 Applicable Documents:This annex should be used in conjunction with the ARP4104 core document
3、.2.2 Definitions:2.2.1 FLIGHT ENVELOPE AWARENESS:A function that incorporates modification of control characteristics, or control laws outside the normal flight envelope as a means to alert the pilot flying of a specific exceedance of aerodynamic, structural, or other boundaries.2.2.2 FLIGHT ENVELOP
4、E PROTECTION:A function that incorporates a modification of control laws outside the normal flight envelope in order to prevent or minimize the risk of exceedance of aerodynamic, structural, or other boundaries. Inputs of the pilot flying may be overridden by the system.RATIONALE This document has b
5、een reaffirmed to comply with the SAE 5-Year Review policy. SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any parti
6、cular 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 be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2007 SAE Intern
7、ational 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, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-73
8、23 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE ARP4104/1 - 2 -3. OPERATIONAL REQUIREMENTS:3.1 General Objectives:3.1.1 Flight Envelope Awareness/Protection should be provided when feasible.3.1.2 A Flig
9、ht Envelope Awareness/Protection may be applied to any flight parameter where enhanced awareness and/or protection is considered beneficial. Sample parameters are: angle of attack, speed, load factor, pitch, roll, yaw, and side-slip.3.1.3 In the absence of failures, the Flight Envelope Awareness/Pro
10、tection shall be available in all appropriate flight phases. The method of protection shall be consistent in normal operation.3.1.4 Flight Envelope Awarenss/Protection inevitably restricts some maneuvering, however it should not compromise the necessary maneuvering capability of the aircraft. Carefu
11、l consideration shall be given to maximizing remaining maneuver capability to enable the optimum use of available kinetic and potential energy for use in situations such as low speed recovery and windshear.3.1.5 When Flight Envelope Awareness/Protection interfaces with multiple systems, e.g., Flight
12、 Control Computer and autothrottle, the resulting commands shall be coordinated.3.1.6 Flight Envelope Awareness activation shall be conveyed in the most instinctive method possible. Tactile feedback through the associated control is preferred.3.1.7 The pilot flying shall be able to override Flight E
13、nvelope Awareness using the associated control.3.1.8 When Flight Envelope Protection is implemented, it should be preceded by Flight Envelope Awareness if other cues are inadequate.3.1.9 In the event of excursions outside the Flight Envelope Protection boundaries, the system shall not hinder recover
14、y, and where possible should assist the pilot flying.4. PANELS:Number not used.5. CONTROLS:Number not used.SAE ARP4104/1 - 3 -6. DISPLAYS:6.1 Display of boundaries and margins associated with Flight Envelope Awareness/Protection on the PFD should be provided where desirable. (See ARP4102/7, Appendix
15、 A.)6.2 Any failure of the Flight Envelope Protection System shall be suitably annunciated, and shall result in clear annunciation of the failed feature(s).6.3 When the aircraft exceeds Flight Envelope Awareness thresholds, the exceedance shall be continuously indicated through an appropriate combin
16、ation of force feedback, aural, and visual annunciation.6.4 When Flight Envelope Protection is active, system operation should be apparent through discrete annunciation and force feedback, or (at the minimum) unmistakable changes in aircraft response, especially when inputs of the pilot flying are overruled.PREPARED BY SAE COMMITTEE S-7, FLIGHT DECK AND HANDLINGQUALITIES STANDARDS FOR TRANSPORT AIRCRAFT
