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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2012 SAE International All rights reserved. No part of this p
3、ublication 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: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS5716A AEROSPACE STANDARD AS5716 REV. A Issued 2010-02 Revised 2012-12 Supersedi
5、ng AS5716 Standard Electrical and Logical Interface for Airborne Fuzing Systems RATIONALE Document has been revised to include definitions for the following interfaces: 3 power supply; Initiation inhibit discrete interface; Target detection sensor interface; Post release environment sensor interface
6、. These elements complete the definitions in the Standard of all elements necessary for the Class 2 and Class 3 interfaces for interchangeable fuzes. Also included are a small number of revisions to clarify elements of the previous standard that were unclear (definitions of bit mapping) and correcti
7、ons to inconsistent tolerance margins. FOREWORD The standard addresses the electrical, logical and functional characteristics of the interface between the weapons fuzing system(s) and the rest of the weapon, to enable interoperability of fuzing systems and weapon systems. The goal is to improve the
8、effectiveness and readiness of NATO forces by reducing the logistics associated with supporting airborne weapon systems in the theater of operation. This effort has been closely coordinated with the SAE AS-1B7 Fuzing System Mechanical Task Group which has been tasked by the AS-1 Technical Committee
9、to generate an AS standardizing the mechanical fuzing system interface for the fuzing system wells and fuze electrical connector. For information on the standardization of the mechanical interface between 3-inch bomb fuzes and the remainder of the weapon, reference should be made to document AS5680A
10、. SAE AS5716A Page 2 of 86 TABLE OF CONTENTS 1. SCOPE 5 2. REFERENCES 6 2.1 Applicable Documents 6 2.1.1 SAE Publications . 6 2.1.2 NATO Publications 6 2.1.3 U.S. Government Publications 7 2.2 TIA Publications 7 2.2.1 ISO Publications 7 2.3 Definitions . 8 2.4 Abbreviations 11 2.5 Nomenclature 12 3.
11、 GENERAL INFORMATION . 13 3.1 General Interface Information . 13 3.1.1 Functional Interface Classes . 14 3.1.2 Interface Connections . 14 3.2 Digital Communication 20 3.2.1 Fuzing System Serial Data Interface 21 3.2.2 Post Release Environment Sensor Serial Data Interface . 21 3.3 Power Requirements
12、21 3.3.1 Port 1 Power, Port 2 Power and Port 3 Power and Returns . 21 3.4 Discrete Signal Requirements 22 3.4.1 Release Consent Monitor . 22 3.4.2 Release Indication 22 3.4.3 EOD Arm State Monitor and Return . 22 3.4.4 Initiation Inhibit 22 3.4.5 Target Detection Device Signal and Return . 22 3.4.6
13、Post Release Environment Sensor Signal and Return . 22 3.4.7 Address Bit Discretes 23 3.5 Reference Lines 23 3.5.1 Signal Return 23 3.5.2 Structure Ground. 23 3.6 Sequence of Operations . 23 4. DETAILED REQUIREMENTS 23 4.1 Detailed Requirements on the Weapon 23 4.1.1 Connector Type, Contact Identifi
14、cation, and Interface Functionality 23 4.1.2 Requirements for Digital Communication . 24 4.1.3 Power Requirements 24 4.1.4 Requirements for Discrete Signals . 29 4.1.5 Reference Line Requirements 33 4.2 Detailed Requirements on the Fuzing System . 33 4.2.1 Connector Type, Contact Identification, and
15、 Interface Functionality 33 4.2.2 Requirements for Digital Communication . 34 4.2.3 Power Requirements 34 4.2.4 Requirements for Discrete Signals . 37 4.2.5 Reference Line Requirements 41 4.3 Fuzing System Serial Data Interface 42 4.3.1 Overview . 42 4.3.2 General Requirements 43 4.3.3 Communication
16、s Protocol . 50 4.3.4 Examples of Protocol Usage . 70 SAE AS5716A Page 3 of 86 4.4 Post Release Environment Sensor Serial Data Interface . 72 4.4.1 Overview . 72 4.4.2 General Requirements 73 4.4.3 Communications Protocol . 75 4.4.4 Detailed Requirements . 77 4.4.5 Example of Protocol Usage 78 4.5 S
17、equence of Operations . 78 4.5.1 Overview . 78 4.5.2 Carriage Phase Operations 82 4.5.3 Release Preparation Phase Operations . 83 4.5.4 Release see also Unarmed DISTRIBUTED FUZING SYSTEM: A fuzing system whose components (e.g.,fuzing system main housing, sensors, etc.) are not located within a singl
18、e device, but in multiple devices, such that there is a connection between these multiple devices, allowing the transfer of signals and/or energy between them. For the purpose of this document the sum of all parts of a distributed fuzing system is considered to be the fuzing system even if some part
19、s are installed permanently into the weapon (e.g.,external sensors). SAE AS5716A Page 9 of 86 ENVIRONMENTAL SENSOR: A component or series of components designed to detect and respond to a specific environment. Source: MIL-STD-1316 EOD ARM STATE MONITOR: A discrete interface that allows detection of
20、the fuzing system arm state. EXTERNAL COMPONENTS: See Fuzing System External Components, if related to the fuzing system. EXTERNAL SENSOR: A sensor that is part of the fuzing system and that is outside of the fuzing system main housing. FIRING: See Initiation. FIRING ENERGY: The energy used to initi
21、ate the explosive train. FUZE: A physical system designed to sense a target or respond to one or more prescribed conditions, such as elapsed time, pressure, or command, and subsequently initiate a train of fire or detonation in a weapon. Safety and arming are primary roles performed by a fuze to pre
22、clude ignition of the weapon before the desired position or time. The term Fuze usually denotes a single device. See also Fuzing System. FUZING SYSTEM: A physical system designed to sense a target or respond to one or more prescribed conditions, such as elapsed time, pressure, or command, and to sub
23、sequently initiate an explosive train in a weapon. Safety and arming are primary roles performed by a fuzing system to preclude ignition of the weapon before the desired position or time. A safety and arming device is a part of a fuzing system. A fuzing system may or may not be a single device. See
24、also Distributed Fuzing System and Fuzing System External Components. FUZING SYSTEM EXTERNAL COMPONENTS: Components of a distributed fuzing system, which interface with the fuzing system main housing but are located outside the fuzing system main housing. Examples are power sources, and environmenta
25、l sensors. FUZING SYSTEM MAIN HOUSING: For distributed fuzing systems only: The fuzing system main housing (also known as the “fuze can”) is a single device that contains safety related fuzing system functions and may contain one or more target or environment sensors. Additional components of the fu
26、zing system (e.g.,environment sensors) may be located outside the fuzing system main housing. See Fuzing System External Components. INITIATION: Firing of the first element of an explosive train. INITIATION INHIBIT: A discrete signal from the weapon that temporarily prohibits the initiation of the e
27、xplosive train independent of the arm state. IN-LINE FUZE: An In-Line Fuze is a fuzing system with a non-interrupted explosive train as defined in STANAG 4187. See also Out-of-Line Fuze INTERCHANGEABILITY: A condition which exists when two or more items, in a specified life cycle and environment, po
28、ssess such functional and physical characteristics as to be equivalent in safety, performance and durability, and are capable of being exchanged one for the other without alteration of the items themselves, or of adjoining items, except for adjustment, and without selection for fit and performance.
29、Source: NATO AOP-38 INTERFACE CONTROL DOCUMENT: An Interface Control Document describes the interface to a system or subsystem. An Interface Control Document may describe the inputs and outputs of a single system or between two systems/subsystems. The purpose of an Interface Control Document is to c
30、ommunicate all possible inputs to and all potential outputs from a system for some potential or actual user of the system. Source: based on Wikipedia.org INTEROPERABILITY: The ability of systems, units or forces to provide services to and accept services from other systems, units or forces and to us
31、e the services so exchanged to enable them to operate effectively together. Source: NATO AOP-38 SAE AS5716A Page 10 of 86 JETTISON: Deliberate separation from the aircraft or ejection of a weapon, where one prime requirement is for the payload to NOT operate and the fuzing system to remain safe. Thi
32、s may be achieved by one or more methods, depending on the design of the individual weapon and/or fuzing system. MISSION DATA: Data that is provided to the fuze to enable it to operate in accordance with the mission requirements, e.g.,delays, times, distances and warhead initiation criteria. MISSION
33、 STORE INTERFACE: The electrical interface on the mission store external structure where the aircraft or carriage store is electrically connected. This connection is usually on the mission store side of an umbilical cable. Source: MIL-STD-1760 MUNITION: See Weapon NON-VOLATILE MEMORY: Memory used by
34、 the fuzing system that is designed to have a data retention time of at least one year with no power applied to the fuzing system. OUT-OF-LINE FUZE: An Out-of-Line Fuze is a fuzing system with an interrupted explosive train as defined in STANAG 4187. See also In-Line Fuze POST RELEASE ENVIRONMENT SE
35、NSOR: A sensor to detect and respond to a valid arming environment after the weapon has separated from the aircraft. It is part of the Fuzing System. It may be part of the fuzing system main housing (e.g.,accelerometer sensor) or external to the fuzing system main housing (e.g.,turbine generator). S
36、ee also Environmental Sensor. RELEASE: Deliberate separation of a weapon from the aircraft as part of a sequence with the intention that the complete weapon operate, including payload operation at the correct point in its deployment. For the purposes of this document, release from the aircraft may b
37、e by any intended means, including tube or rail launch using rocket propellant, downward ejection or simple release under gravity. RELEASE CONSENT: A low power discrete from the aircraft to the weapon defined in MIL-STD-1760. When in the enabled state, it is used by the weapon to authorize the use o
38、f safety critical functions commanded over the data bus interface. RELEASE INDICATION: A signal that indicates to the fuzing system that the separation of the weapon from the aircraft has taken place or will take place irreversibly under fault-free conditions. RELEASE or between a store, or portions
39、 thereof, and suspension equipment. Source: MIL-HBK-1763 SINGLE-SHOT DEVICE: Any device that operates only once due to irreversible processes taking place. Typical examples in fuzing systems are pyrotechnic actuators or mechanical devices that lock after operation. STORE: See Weapon SAE AS5716A Page
40、 11 of 86 TARGET DETECTION DEVICE: A sensor to detect and respond to a target or environment. The presence of that target or environment is used by other elements of the fuzing system to determine when to initiate the payload. UMBILICAL DISCONNECT: The permanent physical disconnection of the MSI con
41、nection either immediately before or during the separation of the weapon from the aircraft or carriage system. UNARMED: A fuzing system is unarmed when all safety devices are in a safe position. Source: NATO AOP-38 VOLATILE MEMORY: Memory used by the fuzing system to store data that does retain the
42、data only while power is applied. WEAPON: For the purposes of this document only, the term ”weapon“ denotes all of the carried equipment below the MSI connector. The terms ”store“ and ”munition“ are retained only where they form part of a definition extracted directly from other released publication
43、s and may be considered in this context to be synonymous with ”weapon”. WEAPON SIDE: For the purposes of this document only, the term “Weapon Side” refers to the other side of the connector interface from the fuzing system main housing. It may include the weapon (guidance computer, mission computer)
44、, power sources, etc., as well as additional components of the fuzing system, such as target sensors or environment sensors. 2.4 Abbreviations ac: Alternating Current ACK: Acknowledge BC: MIL-STD-1553 Bus Controller BIT: Built In Test CTS: Commit to Separate Store or Submunitions CTSS: Committed to
45、Store or Submunitions Separation dc: Direct Current EOD: Explosive Ordnance Disposal FIA: Fuze Inhibit Arming FCM: Fuze Cancel Mission FAD: Fuze Arming De-Inhibit FPR: Fuze Prepare for Release FRI: Fuze Release Imminent FRR: Fuze Ready for Release FS: Fuzing System FSQ: Fuze Status Query ICD: Interf
46、ace Control Document LB: Lower Byte SAE AS5716A Page 12 of 86 LSB: Least Significant Bit MSB: Most Significant Bit MSI: Mission Store Interface NSAA: National Safety Approving Authority PDU: Protocol Data Unit PRASS:Post Release Air Speed Sensor PRES: Post Release Environment Sensor RC: Release Cons
47、ent RCM: Release Consent Monitor RF: Radio Frequency RI: Release Indication RMS: Root Mean Square RT: MIL-STD-1553 Remote Terminal SDU: Service Data Unit TBD: To Be Defined / To Be Determined TDD: Target Detection Device UART: Universal Asynchronous Receiver/Transmitter UB: Upper Byte 2.5 Nomenclatu
48、re Byte: One byte comprises eight bits. Where bytes are mentioned in this document, it always refers to 8 bits of data. A byte may represent data or a control code associated with communications protocol. Command: A message by the weapon to the fuzing system. Data Frame: A data frame of the Fuzing S
49、ystem Serial Data Interface comprises a message preceded by a Start Flag and terminated by an End Flag. A data frame of the Post Release Environment Sensor Serial Data Interface comprises a synchronizing flag followed by a message. Message: A message on the Fuzing System Serial Data Interface comprises a number of complete PDUs including an address byte, a control byte and any data as applicable.
