1、4 f MIL-C-2371bA 58 77777Ob 0352368 T W 1 MIL-C-23716A(8s) MIL-c-23716 (WEP ) MI Li TARY SPECIFICATION 15 JANARY 1964 COMPUTER SET, LOFT BOMB RELEASE AN/AJB-3 This specificatfon has been approved 5y -e Navil Air Ssstems Connnand, Department of the Navy. 1. SCOPE 1.1 Scope - The equipment covered by
2、this specification shall provie the functions of an ali-attitude flight reference system plus a correlated loft bomb release system. Set Shall consist of the items listed in 6.8. 2. APPLICABIE DOCUMENTS 1.2 Classification - The AN/AJB-3 Loft Bomb Release Computer 2.1 General - The documents listed i
3、n 6.10 of the issue in effect on the date of invitation for bids form a part of this specification to the extent specified herein. . 3. FEQUIIIEMEN!TS W3.1 Preproduction - This specification makes provis ion for Parts and Materials - In the selection of parts and preproduction testing. materials, fu
4、lfillment of major design objectives shall be the prime consideration. *3 2 In so doing the following shall govern: (i) Microelectronic items shall conform to requirements specified herein. (2) Other parts and materials re uirements shall con- form to Specification MILE- 2 400. (3) Nonrepairable sub
5、assemblies, as outlined in Speci- fication MIEE-400, shall be used when practicable. The general size of the subassembly and the amount of circuitry to be included therein shall be approved by the procuring activity. assemblies must be reliable. Nonrepairable sub- (See 6.4) (4) When previously produ
6、ced models of this equipment did not use nonrepairable subassemblies, the design shall not be changed to employ nonrepairable assem- blies without the approval of the procuring activity. 1 FSC 5826 6 -* THIS DOCUMENT CONTAINS PAGES, Provided by IHSNot for ResaleNo reproduction or networking permitte
7、d without license from IHS-,-,-MIL-C-237LbA 5 7777706 0352367 I 4 MIL-C-23716R (AS) 3.2.1 Nonstandard Parts and Materials Approval - Approval for the use of nonstandard parts and materials shall be obtained as outlined in Specification MIL-E-$.hOO. as outlined in WR-98. Microelectronic Device8 shall
8、 be approved Microelectronic Modular Assemblies - When used, Micro- electron lb202 c Modular Assemblies shall meet the requirements OP WR-98. 3 e2 =3 Modules, Maintenance - The electronic portions of the equipment shall be divided into maintenance modules (see Specification MILS-23603) . Maintenance
9、 modules shall normally be considered. repairable. 3.2.4 Microelectronic interchangeability - The interchangeability provisions of WR-98 shall govern microelectronic interchangeability. 3.3 Design and Construction - The equipment shall conform with all the applicable requirements of Specification MI
10、L-E-5400 for design, constructin and workmanship, except as otherwise specified herein. *3.3*1 Total Weight = The total weight of the equipment, excluding cables, shall be a minimum consistent with good .design and shall not exceed 66.5 pounds, 3.3.2 Reliab ilitx *3 3 e2 1 erational Stability - The
11、equipment shall operate with satisfactory performage, continuously or intermittently for a period of at least 20 hours without the necessity for readjustment of any controls which are inaccessible to the operator during normal use. *3 3 2 2 Operating LFfe - The equipment shall have a total operating
12、 lue of %O0 hours with reasonable servicing and replacement of parts. requu.mg scheduled replacement shall be specified by the contractor. parts *3.3.2.3 Reliability in Mean Time Between Failures (MTBF) - The equipment shall have 200 hours of mean (operating) time between failures when tested and ac
13、cepted as outlined under therequirements of 4.4.3. of individual items shall be as specified in 6.8. The MTBF 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-237LbA 58 M 7779706 0152370 8 MIGC-23716A(gS) *3 3 . 2 e4 Time Totalizing Meter - Th
14、e equipment shall contain time totallahg meters in accordance with Specification MIGM-7793. Meters shall be included in the following Units: (i) Adapter-Compensa tor, Compass ML2488A/AJB-3 (2) Amplifier-Power Supply AM-1931/AJB-3 .( 3) Gyroscope Assembly, Displacement CM-k2!tA/AJB-3 3.3.3 Cabling an
15、d Connections *3 e3 3.1 Cables and Connectors - The equipment shall provide for the Interconnection Cabling - The equipment shall be capable of use of cables and connectors in accordance with Specification MILE-$dO. *3 3 3 e2 satisfactorg operation using external wlrlng in accordance with the app1ic
16、a.Pl.e requirements of Specification M1-1:-5088 . except that a minimum nurrer of the individual wires may be shielded when demonstrated as necessary to meet interference control requirements and provided the assembly of the cable to its plugs may be easily accomllsnsd and that portion of the connec
17、tors attached to the cables shall not be supplied as part of the equipment. equipment, interchangeability shall exist between units and all replaceable assemblies, subassemblies, and parts of a designated model of any previously manufactured equipment, supplied or designated by the procuring activit
18、y. by the equipmer?t and the vulnerability of the equipment to radio interference shall be controlled within the limits of Specification MIL-1-6181. The external wiring shall be unsnielaed, External cables *3.3.4 Interchangeability of Reordered Equipment - For reordered w3.3.5 Interference Control -
19、 The generation of radio interference W3.3.6 Maintenance Provisions and Field Testing - Provisions for maintenance shall be as specified in Specification PiILE-5400 points and test facilities shall be provided to the greatest extent practicable for ease of field testing and maintenance. nameplate. a
20、pprovai for equipment identification shall be in accordance with Specification MIGN-18307. Specific test 3.3.7 Nomenclature and Nameplates - Nomenclature assignment and 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I. MIL-C-2371bA 58 W 7777706 03
21、52373 T *3.3.8 Standard Conditions - The following conditions shall be used to establish normal performance characteristics under standard conditions and for making laboratory bench tests. Temperature Room ambient (25% PC) Altitude Noma1 Ground Vibration None Humidity Room ambient up to 90$ relative
22、 humidity U5 +l.OV AC, 400 +5 CpS - Input Parer Voltage and 27.5 20.5V DC 3.3.9 Service Conditions - The equipment shall. owrate satisfactorily under any of the environmental service conditions or reasoname combination of these conditions as specified in. Specification 1.iILE-5100 for Class 2 equipm
23、ent, except as modified herein: satisfactorily when subjected to the vibration requirements of Curve III of Specification MIL-E-SbOO, except the follaring items which shall operate satisfactorily when subjected to vibration requirements specified. *3.3.9.1 Vibration - Each item of the equipment shal
24、l operate - Unit Requirement Indicator-Programmer Proc. V, MIL-E-5272 Controller, Compass System Proc. V, MIL-E-5272 JD-695A/AJB-3 C-2499A/A JB-3 ID-694/AJB-3 CN-49LA/AJB-3 Indica tor, Attitude-Dire ctor Gyroscope Assembly, Displacement Proc. V; IIIIL-E- Curve II, PlIL-E-s4OO 3 e10 Fiam-Up-Time - he
25、 time required .for the equipment to warm-up prior to operation shall be kept to a minimum and shal not exceed 1 minute under standard conditions and 5 minutes at extreme service conditions. 3.11 Primary Input Power Requirements - The equipment shall meet all applicable requirements of MIL-STD-704 a
26、nd shall give specified per- formance from the follbd with less than 30 rotation. be evidenced by shutting off the continuous tone signal, the horizontal pointer on the attitude indicator returning to its center position, pitch trim being reactivated, and the system returning to all-attitude mode. *
27、3 4 7 . 6 RoU Error Signal - With the system externally connected *3.4.7.7 Yaw Error Signal = With the system externally connected for *3.4.7.8 Bomb Cancel - With the system externally connected for a Bomb cancel shall *3.4.8 Performance at Temperature Extremes - The equipment shaU. perform as speci
28、fied herein at temperature extremes except as follows! W.1i.8.1 Erection and Synchronizatioh = The OFF Flag shall disappear from view within seconds. Within 10 minutes the heading indication shall be within beso of the compass transmitter heading. *3.4 . 8.2 Erection Rates - The roll and pitch slow
29、erection rates shall be 1.5 I +LO degrees per minute. *3,4.8.3 Slaving Rate = !he slaving rate shall be 0.5 to 2.5 degrees per minute. 8 .- ir, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-C-2373bA 58 W 7777906 O352376 7 MIGC-23716A (AS) *3.
30、4.7.5 Yaw Rate Switching - Within 25 seconds after the turn rate is reduced to zero, the synchronizing function and roll erection voltage shall be restored, *3.4 . 8 .5 Latitude Compensation - The heading indication shall not change more than 4 11i onewra tion . +3.4.9.6 G Program Adjustment - “he r
31、un-down time shall be 2.0 - +0.2 seconds without readjusting the setting of 3.4.8.2. *3,4.8.7 Roll Error Signal - Roll indications shall be equal within 3.0 degrees for 10 degrees roll of the #roscope. 93.4.8.8 Yaw Error Signal - hll indications shall be equl within 4.0 degrees for 12“ yaw of the gy
32、roscope. *3.5 Detail Requirements - * *3.5;1 Adapter-Compensator, Compass MX-2488A/AJB-3 - The Compass Adapter-Compensator shall meet the following requirements: *3,5.1.1 Function - The Compass Adapter-Compensator shall provide azimuth, heading outputs wing basic input signals from a ML-1 Compass Tr
33、ansmitter per MIL-T-19576, a Displacement Gyroscope Assembly CN-L9.1.4.7 Slewing System - The slewing system shall consist of The gearing shall a reversible AC motor and gearing between the differential synchro transmitter rotor and the stator of the servo control transformer. produce a 1 to 1 Fc?ta
34、%ion radio between the tswo synchros. power for the servo system, slewing system and excitation for the differential control transmitter and the compass control transformer. supply voltages for excitation of the latitude compensation potentiometer in the Compass Controller and excitation of the torq
35、uers in the Displacement Qyroscope for free and slaved modes of operation. *3.5.i.h.9 incorporated to provide fast synchronization and slaving cutout functions. Jt3.5.1.5 perf orxance requirements : *3.5.1.5.1 synchro transmitter, the servo system shall provide the following performance. *3.5.1.1:.8
36、 Parer SuppQ - The power supply shall provide the operating It shall also Switching - Relays or solid-state mitching shall be Performance - The equipmnt shall meet the following Servo -When connected to a matching (See 3.5.1.1.1.1) Static Accuracy + LO0 Follow-up Rate, Minimum ?O0/ Follow-up Lag, Ih
37、imWn -0125o/m Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2373bA 58 m 7777706 0352377 Li W *3.5.1.6.1 Slaving Amp lifier - lieu of 5.6 + 0.9V. - q-C-23716A (AS) ik3.5.1.5.2 Slavin lifier - With the flux value simulator set at 150 and the ou
38、tput data shafEet at O, a current greater than 50 microamperes shall flow from pin R to pin P of 5910 and there shall be an output of 5.6 2 O.9V, 400 cps, pahse B + 90 at pin D of J910 with respect to 5903 pin D. Application of 28 + 1 V DC between J910-S and 5903-D (with - to 5903-D) shall align the
39、 output data Shaft to 150 i. ho within 5 seconds, after alignment a current of 7.5 microamperes or less shall flow from pin R to pin P of 5910 6 *3.5.1.5.3 Heading Data Synchro Transmitters - The electrical error of the heading data transmitters shall not exceed 0.25O. error shall not exceed 2 0.25O
40、. *3.s.i.5.4 Differential Synchro Transmitter - The CDX output signal *3.5.1.5.5 adjustable 2 3.50. 24 Point *chadcal Cam Compensator - Each point shall be *3.5.1.5.6 Co-ass Control Transformer - The output signal. error shall not exceed 2 0.75O. *3.5.1.5.7 Slewing System - The slewing system shall
41、drive the rotor of the differential control transmitter and the stator of the servo control transformer at a mininnun rate of so/secand. *3.5.1.5.8 Power Supply - With 115/200 V 2 2$, 400 cps applied, the output voltages of the power supply shall be within the specified limits with the specified loa
42、ds. Voltage (a) 7.0 +_0.28V, 400 cps, C-?Oo 237.5 +jO +0.9$ (b) 12.0V minhum, lb00 cps, C 3% +j277 22% with TRIM full cwj6.0 maximum, 400 cps, C with TKIMfull CG4 (c) 22 to 28V, 400 cps, B 354 +j2?7 22% *3.5.1.6 Performance at Temperature Extremes - Nhen tested at environmental extremes, the compass
43、 adapter shall perform as specified above except as follows: The output shall be 5.6 2 1.6 in 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2371bA 5B 7777906 0152380 O MIL-C-23716A (AS) *3.5.1.6.2 Power Supply - The output shall be 7.0 2 1
44、.V in lieu of 7.0 - + 0.28V. *3.5.1.7 shall be provided supply shall meet *3.5.2 W3.5.2.1 Electrical Connections - Connections to external circuits as shown in Figure 1. the following requirements: Amplifier-Power Supply O m?aXirmin! at maximum rate 0.7 - i6 Provided by IHSNot for ResaleNo reproduct
45、ion or networking permitted without license from IHS-,-,-Y-C-23716A (AS) *3.S.2.4. Attixde Indicator Pitch Servo Amplifier - This amplifier shall have the following nomid characteristics and shaU. provide the performance specified when connectez in AiJ/AJB-3 system. (i) characteristics: input Nedanc
46、e Load impedance input at saturation Output at saturation Null output (2) Perf ormance: 1K ohms. minimWn i58 +j104 ohms 0.6V AC, C in series with 20K ohms 16V AC leading motor fixed phase by 900 3.0V AC, maximum Follow-up rate 300/sec. minimum Follow-up lag 0. So/W/sec. maximum Positional accuracy H
47、unting and jumping Pitch input signal 1.0 +O1,!P maxinui at maximum rate - Danping factor O* 7 *3,5.2.4.7 Attitude Indicator 2011 Servo Amplifier - This amplifier shall have the following norninal characteristics and shall provide the performance specified when connected in an AN/AJB-3 system. (i) C
48、haracteristics nyut inq, edance Load impedance Input at saturation Output at saturation Null output 1K ohms minirmUn 87 +ji09 ohms 0.6QV AC, C in series with 20X ohms isV AC leadiag motor fixed phase by 90 3.0V AC, ( 2 ) Perf ormance : Follow-up rate 300O/sec. minimum Follow-up lag O. 5O/io/sec. max
49、imm Posit ional accuracy 0i. iqut signal 21.00 +.50 naximm at Hunting and juiing - maximm rate Damping faclar 0.7 17 . -L . -. . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-T37LbA 58 7979906 OL5235 T W *3.5.2.4.8 Attitude Indicator Azimuth Servo Anplifier - This amplifier shail have the following nominal charac
