1、MIL-T-b3520 LO 9997706 0351686 O MIL-T-63520 (AR) 27 December 1981 MILITARY SPECIFICATION TURRET SUBSYSTEM, UNIVERSAL (UTS) FOR ARMAMENT SUBSYSTEM, HELICOPTER, 20MM: M97E1 AND M97E2, GUN CONTROL ASSEMBLY FOR This specification is approved for use by the U.S. Army Armament Research and Development Co
2、mmand, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 This specification covers requirements, quality assurance provisions for ,C,ontrol Assembly, Gun, for Armament Subsystem Helicopter, 20MM: M57E2. required circuitry to translate signals from th
3、e aircraft into appropriate signals for turret subsystem control and safe weapon firing sequence. M97E1 and The Gun Control Assembly is a totally enclosed box that contains the 2. APPLICABLE DOCUMEIUTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified (see 6.2)
4、, the following specifications ana standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation, form a part of this specification to the extent specified herein. SPECIFICATIONS MILITARY MIL-6-5087 - Bonding, El
5、ectrical and Lightning Protection, for Aerospace Systems. MIL-W-63750 - Weapons and Support Materiel, Standard Quality Assurance Provisions for. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-63520 30 m 7997906 0353687 2 MIL-T-63520 (AR) STAN
6、DARDS : MIL I TARY MIL-STD-105 - Sampling Procedures and Tables for MIL-STD-109 - Quality Assurance Terms and Definit ions. MIL-STD-454 - Standard General Requirement for Electronic MIL-STD-461 - Electromagnetic Interference Characteristics MIL-STD-704 - Electric Power, Aircraft Characterisitics MIL
7、-STD-810 - Environmental Test Methods. Inspection by Attributes. Equipment . Requirement for Equipment, Subsystem and and Utilization of. system. 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and pub1 icat ions form a part of this s
8、pecification to the extent specified herein. DRAW I NGS : US ARMY RESEARCH AND DEVELOPMENT COMMAND 118304 18 - . Control Assembly, Gun. PACKAGING DATA SHEETS P 118304 18 - Control Assembly, Gun. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM E 18 - Method of Tests for Rockwell Hardness and R
9、ockwell Superficial Hardness of Metallic Mater ia 1 s. ASTM B 117 - Method Of Salt Spray (Fog) Testing. (Application for copies should be addressed to: Testing and Materials, -1916 Race Street, Philadelphia, PA 19103). American Society for Copies of specifications and standards required by suppliers
10、 in connect ,311 with specific procurement functions should be obtained from the procuring activity or as directea by the contracting officer.) 2.1.3 Order of precedence. of this specification and the references cited herein, the text of this specification shall take precedence. In the event of a co
11、nflict between the text 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-63520 LO W 7797706 0353688 4 W M IL -T- 63520 (AR ) 3. REQUIREMENTS 3.1 Materials. Materials shall be in accordance with the applicable 3.2 Parts and subassemblies. All p
12、arts and subassemblies shall comply drawings, specifications and standards. with applicable drawings, specifications and standards. 3.3 Gun control assembly. The gun control assembly shall comply with all requirements specified on Drawing (Dwg.) F11830418, all associated drawings, and with al 1 requ
13、irements specifjed in applicable specifications and standards. 3.4 Environmental requirements. The gun control assembly shall perform as specifieo in 3.8 after exposure to the environments specified herein. 3.4.1 Aircraft vibration. The gun control assembly shall perform all functions satisfactorily
14、 after being subjected to MIL-STD-810, test method 514.2, Procedure 1, Part 1, Category C using curve C of Figure 514.2-2 and curve M of Figure 514.2-3. 3.4.2 Transporation vibration. The control panel shall perform al 1 functions satisfactori1.v after being subjected to MIL-STD-810, test method 514
15、.2, Procedure X using curve AW of Figure 514.2.7. 3.4.3 Shock. The gun control assembly shall perform all functions satisfactormter being subjectea to MIL-STD-810, test method 516.2, Procedure 1. 3.4.4 High temperature. The gun control assembly shall perform all 3.4.5 Temperature altitude. Gun contr
16、oi assembly shall operate while functions at +16W F according to MIL-STD-810, test method 501.1. exposed to conditions specified in Method 504.1 of MIL-STD-810 simulating an aititude of 20,000 feet (temperature of -250 F and barometric pressure 2.12 inches mercury). 3.4.6 Humidity. The gun control a
17、ssembly shall perform all functions satisfactorily after being subjected to MIL-STD-810, test method 507.1, Procedure 1. 3.5 First article inspection. This specification contains technical provisions for first article inspections. Requirements for the submission of first article by the contractor sh
18、all be as specified in the contract and 4.3. 3.6 Interchangeability. Unless otherwise specified on the applicable drawings, al 1 parts shal I be interchangeable. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-63520 LO W 7777706 0353687 6 MI
19、L-T-63520 (AR) 3.7 Electrical power supply. The control shall operate from power sources with characteristics conforming to MIL-STO-704. for all acceptance tests shall be as specified in Table I. The power supplies Table I. Electrical Power Pin Function Power Characteristics JI-A J 1-6 Ji-C J1-D J1-
20、G J 1-H Arming 28 +0.5 -0 Vdc at 10A Ground - Low Level Power 28 +0.5 -0 Vdc at 4A Low Level Power 28 +0.5 -0 Vdc at 4A 400 Hz Power Input 400 Hz Power Return 115 Vac Return 115 55% Vac, 400 Hz at 0.6A 3.7.1 Ground. When the Gun Control Assembly is, installed in the helicopter, the enclosures and mo
21、unting components shall be electrically bondea in accoraance with MIL-B-5087. 3.8 Performance requirements. The gun control assemblies shall comply with the performancespecif ied herein, when tested as specified in 4.5.6. 3.8.1 Electronic characteristics. The gun control assembly shall comply with t
22、he electronic characteristics specified in Table II. Parame?er column of Table II presents the inputs, outputs, and external loads, as applicable, that chracterize the interface with the Gun Control Assembly. The signal 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
23、icense from IHS-,-,-MIL-T-63520 LO m 7777706 0353670 2 m Table II. Electronic Characteristics Connector Function Pin Signal Parameter J1 -A J1 -B J1 -C J1 -D J1 -E J1-F J1 -G J1 -H J1 -J J1 -K J1-L J1 -FI J1 -N J1 -P J1 -R 31 -S Arming Power Input Ground Low Level Power Input Low Level Power Input R
24、ocket Lockout Input Turret Delay Input 400 Ht Power Input 400 Hz Power Return Turret Delay Output Gun Motor Relay Return Trigger Input Power Pilot Relay Input Trigger Input Burst Limit Supply Output Rounds Counter Output Burst Limit Input 5 28 +0.5 -0 Vdc at 10A - 28 +0.5 -O Vdc at 4A 28 +0.5 -0 Vdc
25、 at 4A O Vdc or 26 +4 Vdc at a maximum Of 20 mA 26 +4 Vdc at a maximum 07 1A 115 + 5% Yac, 400 Hz at-0.6A 115 Vac Return Minimum of 100 ohms to Ground 26 +4 Vdc through a mTnimum of 100 ohms 26 +4 Vdc at a maximum 07 250 mA 26 - +4 Vdc at 250 mA O Vdc or 26 i4 Vdc at a maximum f TOO mA Minimum of 15
26、00 ohms to Ground 26 +4 Vdc thru a minimum 07 30 ohms O Ydc or 26 +4 Vdc at a maximum of70 m Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- MIL-T-63520 LO W 7777906 0353693 4 Table II. Electronic -Characteristics. (cont Connector Pin Function Sig
27、nal Parameter 52 -A 52 -6 J2-C J2-D J2-E J2-F 52-6 32 -H 33 -A J3-B J3-C 53 -0 J3-E J3-F 33 -G 53 -H 53- J 53 -K J3-L Fire Volts Output Fire Volts Return Feed Solenoid Power Feed Solenoid Return Chassis Return Filtered 28 Vdc Output F il tered Ground Fire Volts Sensor Out Regulated 28 Vdc Output Reg
28、ulated 28 Vdc Return 10 Vac, 400 Hz Output 10 Vac, 400 Hz Return Sight Trigger Input 26 Vac, 400 Hz Output 26 Vac, 400 Hz Return Trigger Power Out 28 Vdc Low Level Output Ground 115 Vac Out See 3.9.7 See 3.9.7 3 ohms +lo%, 300 W Res istor between J2-C and J2-D Same as J2-C - 8 ohms +lo%, 100 W Res i
29、stor to Ground - 10,000 ohms - +lo% to Ground 100 ohms - +lo% to 33-B - .200,000 ohms - +lo% to J3-D In Parallel with J1-N 10,000 ohms - +lo% to 53-6 - 1000 ohms +lo% to Ground 100 ohms +lo% to Ground - - - - - 1000 ohms +lo% to J3-a - 6 Provided by IHSNot for ResaleNo reproduction or networking per
30、mitted without license from IHS-,-,-MIL-T-63520 10 W 9999906 0351692 6 MIL-T-63520 (AR) Table II. Electronic Characteristics (Cont) Connec tor Pin Function Signal Parameter 33-M 33-N 33-P J3-R J3-S 33-1 J3-U J3-V 33-w J3-X -33-Y 33-2 J3-a J3-b 33-c Pilot Relay Out At imuth Error Input Right Azimuth
31、Limit Input Rounds Counter Input 28 .Vdc Output to Ret ic le Ret ic le Return Down Elevation Limit Input Up Elevation Limit Input Left Azimuth Limit Input Elevation Error Gate Input 115 Vac Output 115 Vac Return 1000 ohms +lo% to Ground - 0.5 +0.5 Vdc .or 16 +4 Vdc at-a maximum of lmA 0.5 +0.5 Vdc o
32、r 26 +4 Vdc at-a maximum of 2 mA Open Circuit or Short Circuit to Ground 1000 ohms +lo% to J3-T - - 0.5 +0.5 Vdc or 26 +4 Vdc at-a maximum of 2n mA 0.5 +0.5 Vdc or 26 +4 Vdc at-a maximum of 20 mA 0.5 +0.5 Vdc or 26 14 Vdc at-a maximum of 2 mA 0.5 +0.5 Vdc or 16 +4 Vdc at-a maximum of 1-m 1000 ohms -
33、 +lo% to 33-2 115 Vac Return for J3-L - - - Chassis Ground - Inter locked ir igger 1000 ohms - +lo% to 28 Vdc 3.8.2 Test oints. The 5-4 test connector characteristics shall be as shown in Tab *e e II voltage characteristics specified in Table III were obtained with a 100,000 ohm (+lo percent) input
34、impedance measuring device. The resistance values presented are measured between the specified pins, 7 h Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-T-63520 LO M 7777706 0351673 Connector Pin Table III. Gun Control Unit Test Connector J4-Sig
35、nals Function Signal Parameter D E F G H J K L M N P R S T Reticle Flasher Output Not Used Burst Limit Time Delay In ter locked Trigger Fire Volts Relay Coil Dec lutch ing Feeder Gun Motor Relay Low End) 28 Vdc Regulated 28 Vdc Regulated Return 26 Vac, 400 Hz Not Usea 115 Vac, 490 Ht Soleno id 115 V
36、ac, 400 Hz Return Fire Volts Not Used 28 Vdc High Level Control Sight Trigger Voltage 4700 ohms - +5% to J3-T - 12 +1 Vdc at 6 mA normally; -12 +1 Vdc within 1.28 tOT32 seconds after J1-S equals 28 Vdc Parallel with J3-c 24 +4 Vdc at 2 mA when J2- is O Vdc. 0.5 t0.5 Vdc when J2-A is 350-+50 - Vdc. 1
37、0,000 ohms - +lo% to 52-0 10,000 ohms - +lo% to J1-K 10,000 ohms - +lo% to J3-A O Vdc (Reference) 10,000 ohms - +lo% to J3-F - 10,000 ohms +lo% to J1-G - O Vac (Reference) 10,000 ohms to 32-A - 10,000 ohms +lo% to J1-J Para1 le1 with 31-3 - -_ 8 Provided by IHSNot for ResaleNo reproduction or networ
38、king permitted without license from IHS-,-,-Connector Pin MIL-T-63520 20 W 7777906 035267q T MIL-T-63520 (AR) Table III. Gun Control Unit-Test.Connector34 Signals (Cont) Function Signal Parameter U V W X Y 2 a b C d e f 9 Right Azimuth Proximity Left Azimuth Proximity Up Elevation Proximity Down Ele
39、vation Proximity Azimuth Error Gate E levat ion Error Gate 10 Vac, 400 Hz Not Used Not Used Not Used Not Used Turret Control Power 28 Vdc Return Limit Limit Switch Limit Switch Limit Switch 9 Paral le1 -with J3-P Paral le1 with J3-W Paral le1 with 33-V Parallel with 334 Parallel with 33-N Parallel w
40、ith J3-X Parallel with J3-C 10,000 ohms - +lo% to J1-C O Vdc (Reference) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Connec tor Pin . .NIL-T-b3520 10 979730b 0351695 L Tab le I I I. Gun .Control . Un it. Test. Connector. 34. Signais (Cont) Functi
41、on Signal Parameter . , Rocket Lockout Delay O +0.5 Vdc normally with JlIE at O Vdc 26 +4 Vdc at 8 mA when J1- is at 28.0 Vdc. O +0,5 Vdc reoccurs within 1.0 +0.5 seconds after pin Jf-E is at O Vdc. Rocket Lockout Signal Parallel with 31-E 3.8.3 Feed-through wiring. The f eed-through (cnt inu i ty )
42、 character ist ics of the Gun tontrol Assembly shall be as shown in Table IV. are not performed between the specified pins. Logic operations 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-63520 LO W 9999906 0351696 3 W connected tc 7 MIL-T-
43、63520 (AR) Table 1.V. Feed-Through-Wiring Pin Pin J 1-C JI-C J i-M J 1-R JI-L 31-8 J 1-B 31-8 J i-B JI-B l-D Ji-G J i-G 31-H JI-h 3 4-N di-N 31-A 3 i 33- J J3-S J3-M 33-R 33-H J3-K 53 -G J3-D J3-B 52-6 32-F J3-L J3-Y 33-2 Jl-P J3-E J2-C J3-a 3.8.4 Power outputs. With the power specified in Table I a
44、pplied to Pins Ji-G, dI-H, JI-C, JI-A and Jl-B, the Gun Control Assembly shall provide the following power outputs. The loads shall be as specifed in Table II. a. b. c. of 2.5 - t9.5 degrees when measured at the 400 Hz input frequency. d, 33-A = 28.0 - +I Vdc (Note: See 3.2.1.6(a).) e. 33-F = 26.0 +
45、4.0 -1.3 Vac, 400 Hz - +5 percent 34-K = 23.4 +4.0 -1.3 Vac, 400 Hz - +5 percent 33-C and J4-a = 10.0 +1.3 Vac, 400 Hz +5 percent with a phase lag 34-H = 25.2 - +I Vdc 3.8.5 Input/output relationships. The following input/output relationships shall be as specified in the following subparagraphs. The
46、 output response is measured between the specified output pin and ground. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.8.5.1 Turret time delay. With 28.0 Vdc applied to Pin J1-F, zero +0.5 Vdc shall appear at Pin jl-J when the input power on Pin
47、s 31-C and J1-G i: removed. Twenty-eight +0.5 Vdc shall appear at Pin J1-J within 4.0 +O.O -1.8 seconas after applicatin of the specified input power at Pins J1-C and J1-G. A failure of the regulated 28 .Vdc circuit also causes zero - +0.5 Vdc to appear at Pin 51-3. 3.8.5.2 Ready-to-fire indication.
48、 The presence of a constant 0.7 +0,7 Vdc at Pin J3-T indicates that the firing circuits are enabled. train at Pin J3-T, having the following characteristics, indicates the Gun Control Assembly firing circuits are disabled. A pulse a. 25 - t5 Vdc for 200 - +lo0 milliseconds (ms) b. 0.7 +0.7 Vdc for 175 - +IO0 ms - c. A total period between pulses of 375 - +lo0 ms A steady “low voltage occurs on Pin J3-T when all normal input signal levels, as ciefined in Table V, have been applied. When one or more of the input signals is abnormal, a pulsating output voltage shall occur at Pin J
