SAE-AIR-5682-2007.pdf
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1、_ 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 particular use, including any patent infringement arising there
2、from, 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 International All rights reserved. No part of this publication m
3、ay 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: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org AIR5682 AEROSPACE INFORMATION REPORT Issued 2007-05 Common Launch Acceptability Region Approach Interface Control Document (CLARA ICD) RATIONALE In response to a U.S. Air Force Executive Weapon Systems Review (EWSR)
5、Task Group (TG) charter, the Society of Automotive Engineers (SAE) Common Launch Acceptability Region (LAR) Approach (CLARA) TG produced this Interface Control Document (ICD). The EWSR recognized the expensive nature of the present multiple-LAR development approaches and sought help from the SAE to
6、standardize and document a new common LAR approach that is less expensive and time consuming. The EWSR TG recommended key characteristics upon which to base the new approach. This ICD is based on those key characteristics. FOREWORD Pilots, mission planners, and trainers common objective is to delive
7、r air-launched weapons within the weapons performance envelope called the LAR. The LAR is the region in space from which a released weapon could successfully guide to the target. Typically, the aircraft displays an approximation to the LAR using a mathematical model commonly referred to as the LAR A
8、lgorithm. The weapon may also run the algorithm and pass the approximation of the LAR to the aircraft. As a result of independent attempts by aircraft manufactures, weapon manufacturers, and program offices to develop and implement a LAR Algorithm, multiple LAR approaches exist that are expensive, i
9、ll-maintained, and time-consuming. In an effort to improve this business practice for future weapon integration projects, the U.S. Air Force EWSR formed a TG to study the feasibility of developing a Common LAR (CLAR) approach. The EWSR TG surveyed weapon and aircraft contractors to determine the bes
10、t solution for the CLAR approach. The EWSR TG completed the survey and presented its recommendations to the EWSR on 4 August 1998. One recommendation was to design LAR algorithms so that weapon manufacturers or aircraft offices can make performance improvements through coefficient updates. This reco
11、mmendation serves as the underlying requirement that the LAR Algorithm be coefficient-based. Another recommendation was to standardize the LAR development for all systems. The EWSR then requested the assistance of the SAE to further develop and document an approach that would standardize the develop
12、ment of a coefficient-based LAR process. In response, the SAE created the AS-1B5 CLARA TG (AS-1B is the Aircraft-Store Integration subcommittee under the SAE AS-1 Aircraft Systems and System Integration committee. The number five denotes the TG within AS-1B). The CLARA TG identified four steps to de
13、velop and implement the CLAR process: 1. Develop functional and performance specifications 2. Develop interface control documents 3. Perform algorithm trade studies 4. Implement a promising set of algorithms to demonstrate feasibility Copyright SAE International Provided by IHS under license with SA
14、ELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:40:41 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AIR5682 - 2 - The four functions that the CLARA TG identified are: 1. Data Space Generator 2. Truth Data Generator 3. Coefficient Generator 4. Rec
15、onstructor External to the above four functions are the Truth Database and the LAR Algorithm which provide ancillary support to the CLARA process. This ICD addresses the functional specifications and the interfaces of those functions. Copyright SAE International Provided by IHS under license with SA
16、ELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:40:41 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AIR5682 - 3 - TABLE OF CONTENTS 1. SCOPE4 1.1 Introduction .4 1.2 Purpose.4 2. REFERENCES5 2.1 Applicable Documents 5 2.1.1 SAE Publications.5 2.1
17、.2 NOAA Publications5 2.2 Definitions .5 2.2.1 LAR and Footprint.5 2.2.2 Training and Verification Truth Data Sets.5 2.2.3 Coordinate Systems5 2.2.4 Units7 2.2.5 Atmospheric Model .7 2.2.6 Wind Model.7 2.3 CLAR Acronyms and Terminology Definitions7 3. INTERFACES .10 3.1 Process Description11 3.1.1 D
18、ata Space Generator11 3.1.2 Truth DataGenerator.12 3.1.3 Coefficient Generator13 3.1.4 Reconstructor14 3.2 Interface Requirements.15 FIGURE 1 CLARA SIMPLIFIED DIAGRAM.4 FIGURE 2 WEAPON IMPACT RELATIVE TO TARGET .6 FIGURE 3 CLAR FUNCTIONAL FLOW BLOCK DIAGRAM10 FIGURE 4 NOTIONAL DATA SPACE GENERATOR B
19、LOCK DIAGRAM.11 FIGURE 5 NOTIONAL WEAPON TRUTH MODEL BLOCK DIAGRAM12 FIGURE 6 NOTIONAL COEFFICIENT GENERATION PROCESS.14 FIGURE 7 NOTIONAL RECONSTRUCTOR BLOCK DIAGRAM 15 TABLE 1 INTERFACE TABLES.16 TABLE 2 CLAR DATA SPACE GENERATOR INPUT REQUIREMENTS.17 TABLE 3 DATA SPACE GENERATOR OUTPUT DATA.18 TA
20、BLE 4 TRUTH DATA GENERATOR OUTPUT DATA.19 TABLE 5 RECONSTRUCTOR INPUT CONDITIONS .20 TABLE 6 RECONSTRUCTOR OUTPUT DATA 21 Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 19:40:41 MSTNo reproduction or networking perm
21、itted without license from IHS -,-,- SAE AIR5682 - 4 - 1. SCOPE 1.1 Introduction CLARA identifies four functions: Data Space Generator, Truth Data Generator, Coefficient Generator, and Reconstructor. Together these four functions standardize the solution to the LAR problem. This ICD defines the logi
22、cal interfaces of the four functions. 1.2 Purpose This document specifies the CLARA interfaces of the Data Space Generator, Truth Data Generator, Coefficient Generator, and Reconstructor functions as shown in Figure 1. The weapon and delivery platform developers define the details of each function.
23、Data Space Generator Coefficient Generator Reconstructor Truth Data Generator Truth Database FIGURE 1 - CLARA SIMPLIFIED DIAGRAM The Data Space Generator selects a representative set of discrete release conditions, (such as altitude, wind, speed, and release flight path angle) from a continuum of re
24、lease-condition possibilities. For each set of release conditions, the Data Space Generator defines a corresponding grid of target points. The subset from the multi-dimensional space of discrete release conditions, along with their corresponding grid of target points, wind constraints, and impact an
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