1、MIL-C-81883 bL m 997770b 00950111 m pz6- %I MIL-C-81883 (AS) 4 May 1976 MILITARY SPECIFICATION CONTROL GROUP, ELECTRIC POWER oK-W( V) /A GENERAL SPECIFICATION FOR This specification has been approved by the Naval Air Systems Command, Department of the Navy. 1 eo SCOPE 1.1 Scope. The equipment covere
2、d by this specification shall perform the management function for aircraft electrical systems. management function includes data mu1 tiplexing, demul tiplexing, process- ing, and built-in-test. The control group accepts discrete control and indica tion inputs from bilevel signal sources, multiplexes
3、 and transmits these signals to the data processor. plexed and used as terms in the power management equatins which are solved by the data processor. transmitted, demultiplexed and translated into continuous bilevel control signals to power switching or indication devices. 1.2 Classification. The Co
4、ntrol Group covered by this specification (Figure 1) is composed of: The The input data samples are demulti- The equation solutions are multiplexed, Type Designation Da ta Pro ces sor (8) Crew Control Panel Multiplexers (64 discrete inputs) Demultiplexers (64 discrete output 6) Mu1 t iplexerc/Demul
5、t iplexer (64 inputs/64 outputs) Applicable Number o f Units Para. 2 maximum 3i5.3 1 3.5.4 32 maximum (each 3.55 individually addressable) 32 maximum (each 3.5.6 individually addressable) 32 maximum (each 3.5.7 individually addressable) Data Link Coupler/Terminator 72 maximum 3.5.8 Multiplexer, demu
6、ltiplexer, multiplexer/demultiplexer, Crew Control Panel (Multiplexer/demultiplexer) terminals may be intermixed up to a total of 32 multiplexer and 32 demultiplexer functional addresses. FSC 6110 E Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I I
7、 L r w UE .# 1 2 u Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-B3BB3 b3 7777906 007.5036 O = MIL-C-81883(AS) 2. APPLICABLE DOCUMENTS 2.1 date of invitation for bid form a part of this specification to the extent specified herein. General. T
8、he following documents of the issue in effect on the SPECIFICATIONS Military MIL-B-5087 Bonding, Electrical, and Lightning Protection for Aerospace Systems MIL-W-5088 Wiring, Aircraft; Installation of MIL-E-5400 Electronic Equipment, Aircraft, General Specification for MIL-T-5422 Testing, Environmen
9、tal, Aircraft Electronic MIL-C-6781 Control Panel : Aircraft Equipment, Rack or Equipment Console Mounted MIL-M- 7 7 93 Meter, Time Tota MIL-E - 1 7 55 5 Electronic and E and Repair Parts MIL-T-18303 Test Procedures, izing ectrical Equipment, Accessories, Packaging and Packing of Preproduction and A
10、cceptance for Aircraft Electronic Equipment, Format for MIL-N-18307 Nomenclature and Nameplates for Aeronautical Electronic and Associated Equipment MIL-T-23103 Thermal Per formance Evaluation, Airborne Electronic Equipment; General Requirement for Indicator, Elapsed Time, Electrochemical MIL- 1-81
11、21 9 Naval Air Systems Command - AR- 5 Microelectronic Devices Used in Avionics Equipment, Procedures for Selection and Approval of AR- 1 O A-34 Maintainability of Avionics Equipment and Systems, z General Requirements for Failure Classification for Reliability Testing, General Requirements for . 3
12、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-3883 b1 W 979770b 0095037 2 MIL-C-81883 (AS) AR-104 STANDARDS Mi 1 itary MIL-STD-202 MIL-STD-415 MIL-STD-442 MIL-STD-46 1 MIL - STD - 704 MIL-STD-756 MIL-STD-781 MIL-STD- 785 MIL-STD-794 MIL-STD-1
13、553 Reliability Development Test for Avionic Equipment Test Methods for Electronic and Electrical Component Parts Test Provisions for Electronic Systems and Associated Equipment, Design Criteria for Aerospace Telemetry Standards Electromagnetic Interference Characteristics, Requirements for Equipmen
14、t Electric Power, Aircraft, Characteristics and Utilization of Reliability Prediction Standard Reliability Tests, Exponential Distribufion Reliability Program for Systems and Equipment Development and Production Parts and Equipment, Procedures for Packaging and Packing of Aircraft Internal Time Divi
15、sion Command/Response Multiplex Data Bus (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the con- tracting officer. ) 3. REQUIREMENTS 3.1 Detail S
16、pecification. The individual Control Group requirements shall be as specified herein and in accordance with the applicable detail specification. specification and the detail specification, the latter shall govern. In the event of conflict between requirements of this 3.2 Preproduction. This specific
17、ation makes provision for pre- produc tion testing . 3.3 Parts and Materials.- In the selection of parts and material, ful- fillment of major design objectives shall be the prime consideration. so doing, the following shall govern: In (i) Microelectronic technology and microelectronic items shall co
18、nform to the requirements specified herein. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81883 61 777770b 007501 MIL-C-81883 (AS) (2) Other parts and materials requirements shall conform to MIL-E-5400. (3) When previously produced models o
19、f this equip- ment did not use nonrepairable subassemblies, the design shall not be changed to employ nonrepairable assemblies without the approval of the procuring activity. 3,3.1 Nonstandard Parts and Materials Aouroval. Approval for the use of nonstandard parts and materials (including electron t
20、ubes, transistors and diodes) other than microelectronic devices shall be obtained as outlined in MIL-E-5400, AR-5 o Microelectronic devices shall be approved as outlined in 3.3.2 Microelectronic Modular Assemblies. Microelectronic modular assemblies shall meet the requirements of AR-5. Conformal co
21、atings, encap- sulants, embedments or potting materials used with modular assemblies containing integrated circuits and discrete parts shall be easily removable without damage to the assembly. 3.3.3 Modules. The electronic portions of the equipment shall be functionally modularized in accordance wit
22、h AR-10. 3.4 Desipn and Construction. The equipment shall conform with all the applicable requirements of MIL-E-5400 for. the design, construction, and workmanship, except as otherwise specified herein, or in the detail specification. 3.4.1 a minimum consistent with good design and shall not exceed
23、the value specified in the detail specification. Weipht. The weight of each LRU (Line Replaceable Unit) shall be 3.4,2 Reliability. The contractor shall conduct a reliability program using MIL-STD-785 as a guide, viously produced the equipment, the program previously used may be continued unless oth
24、erwise indicated in the contract or order. On a reorder from a supplier who has pre- 3,4.2,1 Operational Stability. The equipment shall operate as specified herein in both the continuous and intermittent mode for at least the minimum period specified in the detail specification, without the necessit
25、y for readjustment of any controls which are inaccessible to the operator during normal use. 3,4,2.2 life as specified in the detail specification. scheduled replacement. Operating Life. The control group shall have a total operating No parts shall require 3.4.2,3 Reliability in Mean Time Between Fa
26、ilures. The control group, 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81883 (AS) including any built-in-test provisions, shall have an MTBF (Mean Time Between Failures) as specified in the detail specification when tested and accepted as
27、 outlined under the requirements of 4.4, of any portion of a redundant LRU shall be considered a control group failure for the purpose of calculating MTBF. The failure 3.4.2.4 Probability of Mission Success. The control group, including any built-in-test provisions, shall have a computed PMS (Probab
28、ility of Mission Success) as specified in the detail specification when based upon the number of LRUs (Line Replaceable Units) in the group and the mission time specified. Mission success is defined as all outputs being in accordance with discrete bilevel inputs and specified logic. 3.4.2.5 Failure
29、Affecting All Functions. There shall be no single failure which can cause the entire control group to become inoperative. 3.4.2.6 Elapsed Time Recorder. Each LRU shall have provision to record the total accumulated time that electrical power is applied to the LRU. 81219 as applicable. of the LRU ope
30、rating life (3.4.2.2). The recorder shall meet the requirements of MIL-M-7793 or MIL-I- The recorder shall have a time scale equal to 125% 3.4.2.7 Overload Protection. Current overload protection shall be provided for all equipment output wiring. Protection shall be sufficient to prevent danage to a
31、ircraft wiring due to overcurrents. not be utilized. Fuzes shall 3.4.3 Cables and Connectors. The equipment shall provide for the use of cables and connectors in accordance with MIL-E-5400. 3.4.3.1 -Interconnecting Cabling. The equipment shall be capable of satisfactory operation using external wiri
32、ng in accordance with the appli- cable requirements of MIL-W-5088. attached to the cables shall not be supplied as part of the equipment, External cables and the connectors 3.4.3.2 Programming Connectors. Connectors used for programming the memory shall be provided with protective environmental capt
33、ive cwers. 3,404 Interchangeability. The equipment shall meet the interchange- ability requirements of MIL-E-5400. 3.4.5 Provisions for Maintainability. The maintainability program built-in-test features, construction and packaging, provisions for test points, and other maintainability parameters sh
34、all be as specified in AR-10. BIT (Built-In-Test) features shall meet the requirements of 3.5.9. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81883 bL 777770b 0095020 2 = MIL-C-81883 (AS) 3.4.5.1 venient access to electronic circuits for a
35、ll levels of maintenance. The test points shall be compatible with the test equipment designated by the procuring activity for use with the system and each test point shall be protected against inadvertent shorts to ground. The equipment shall be designed to meet the requirements of MIL-STD-415 and
36、AR-10. 3.4.6 Nomenclature, Nameplates, and Identification Marking. Nomenclature and serial number assignments, nameplate approval and identi- fication marking shall be in accordance with MIL-N-18307. Test Points. Test points shall be provided for safe and con- 3.4.7 Service Conditions. The equipment
37、 shall operate satisfactorily under any of the environmental service conditions or reasonable combination of these conditions as specified in MIL-E-5400 for Class 3 equipment, ex- cept as modified herein. 3.4.7.1 Vibration. The equipment shall operate satisfactorily when subjected to the vibration r
38、equirements specified in the detail specifica- tion. 3.4.7.2 Explosive Decompression. The equipment sha and shall operate as specified herein during and after explosive decompression of the surrounding air as data 1 not be damaged exposure ta an led in 4.2.2.1. 3.4.7.3 Nuclear Environment. The contr
39、ol group shall withstand the nuclear and electromagnetic pulse environment specified in the detail specification. according to one of the basic categories defined below: Acceptable response to the defined environment shall be Category I Environment (a) No permanent degradation of performance shall o
40、ccur. trigger any irreversible actuations (e.g., logic circuit change). The system shall recover to normal per- formance within the time limits established by system function requirements. The transient response shall not (b) Category II Environment (a) Output commands shall not change state due to
41、action of the radiation pulse. (b) The system shall resume normal operation after the pulse. 3.4.7.4 Electromagnetic Compatibility. The control group shall comply with the EM1 (Electromagnetic Interference) requirements of MIL-STD-461 (Methods CEO1, CE02, CE03, CE04, CSO1, CS02, CS06, RE02, RSO1, RS
42、02, and 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81883 (AS) RS03) except that the test limits of RS03 shall be 10V/M between 14K Hz to 35M and 5V/M between 35M Hz to 10G Hz. Compatibility) control plan shall specify tolerable conducted
43、 EM1 levels for interconnecting signal lines for procuring activity approval. The EMC (Electromagnetic Input Electric Power 3.4.8.1 ac or dc power per MIL-STD-704, Category C. of accepting power from two separate power sources. function properly with either one or both input power circuits energized
44、. The power drawn from the sources shall be as specified in the detail specification. “he two internal power supply circuits shall be electri- cally isolated within the LRU so that no single power supply failure shall adversely affect the other power supply. supply shall not impair LRU performance.
45、Input Power. The control group shall be designed to accept Each LRU shall be capable The LRU shall Grounding of one power 3.4.8.2 Power Dissipation. When tested in accordance with 4.2.2.8, the power dissipation for each LRU shall not exceed the values Specified in the detail specification. 3.4.9 Cir
46、cuit Isolation. When tested in accordance with 4.2.2.9, each LRU shall comply with the following circuit isolation requirements: (a) The LRU data link interface shall be isolated from ground by an impedance as Specified in the detail specification. (b) Isolation of input and output signals from grou
47、nd shall be as specified in the detail specification. (c) Each power input shall be isolated from other power inputs and from ground by an impedance as specified in the detail specification. (d) The input signal channels of the multiplexer and the output channels of the demultiplexer shall be isolat
48、ed from each other such that a change of logic state, grounding or short- ing to supply voltage of one channel shall not affect any other channel of the LRU. 3.4.10 Bonding and Grounding. The equipment shall meet the bonding and grounding requirements of MIL-B-5087. grounds, the plug-in equipment sh
49、all also have the case ground estab- lished through contacts in the connector. When tested in accordance with 4.2.2.4, the calculated resistance shall not exceed the values given in Table II. In addition to the case The shield for each twisted pair of the data link 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-C-L83 bL 77777Ob 0075022 b shall be carried through
