1、MIL-R-48577 (1) 12 7777706 O323846 O I* -. . . . . . . . . . . .- _ . . . MIL-R-48577 (AR) AMENDMENT 1 . - . . . . . 30 April MILITARY SPEC IFICAT ION . REGULATOR ASSEMBLY: 11747171 This amendment forms a part of Military Specification MIL-R-48577 (MU) dated 27 June 1975. 1979 PAGE 2 Paragraph 3.2.3
2、 Delete and substitute: “3.3.3 Shock.-The Regulator shall meet the requirements of 3.4 after being subjected to cumulative shocks consisting of 3 each at 100 GIs and 40 GIs applied in each direction along each of three mutually perpendicular axes. The shock pulse shall have a wave form of approxima
3、tely a half sine wave. GIs + lo%, the pulse Shall have a time duration of 3 rnillrseconds; for 40 GIs + 10% the shock pulse shall time duration of 18 - + 3 mylliseconds.“ Paragraph 3.3.4, Delete and substitute: For 100 have a - + .2 “3.3.4 Vibration “A“ .-The Regulator shall meet the require- ments
4、of 3.4 after being vibrated sinusoidally along each of three mutually perpendicular axes as follows: shall be .5G 5 10%. a. At a .frequency of 5 Hertz (Hz) , the acceleration b. During a frequency sweep of 5 acceleration linearly from .5G to 1.5Gs c. During a frequency sweep.of 9 constant accelerati
5、on of 1.5 GIs - + 10%. to 9 HZ, increase to 500 Hz, maintain - + 10%. d. During a frequency sweep of 500 to 9 Hz, maintain e. During a frequency sweep of 9 to 5 Hz, decrease f. At 5 Hz, the acceleration shall be .5 G - + 10%. constant acceleration of 1.5 GIs - + 10%. acceleration linearly-from 1.5 G
6、Is to .5 G 5 10%. FSC 1240 ,- WPS DOCUMENT CONTAINS PAGES. ,.-, . . 5. f : . . . .- . . . . I . . . I . . :P: - - -.-.- . . I . _._ . _-_- _ . -.-.-.,. . . I . . - - . . . . - * . . i I . . _. . . .-, . . 1 . . . .- . . . . *, . , . . . ) . .C . . i t_:r:.-:.-.:r:.-.-:.:-.-: . . . . . . Provided by
7、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-48577 (AR) AMENDMENT 1 THe. -frequency of applied vibration shall be swept logarithmically in 15 minute - + 1 minute sweep cycles. for a total of two hours per axis. PAGE 3 Paragraph 3.3.5 , Delete and substi
8、tute: “3.3.5 Vibration “B“.-This requirement shall be met with 24 + 6 Vdc applied and an output current of 500 ma 2 25 ma. The-vibration shall be sinusoidal as follows: a. At a frequency of 5 Hertz (Hz) , the acceleration shall be 1.0 G 5 10%. b. During a frequency sweep of 5 to 500 Hz, maintain con
9、stant acceleration of 1.0 G 5 10%. c. During a frequency sweep of 500 to 5 Hz, maintain constant acceleration of 1.0 G - + 10%. d. At 5 Hz, the acceleration shall be 1.0 G 2 10%. The frequency of applied vibration shall be swept logarith- mically in 15 minute + 1 minute sweep for a total of 15 minut
10、es - f 1 minute along each-of the three mutually perpendicular axes (total vibration time 45 minutes + 3 minutes). Following the vibration test, the regulator shall meet the requirements of 3.4.“ Paragraph 3.4.4.1, Delete and substitute: “3.4.4.1 Input voltage surge.-The regulator shall show no evid
11、ence of damage and the output voltage shall remain within 2.0 to 3.0 volts during the application of 100 millisecond positive square wave pulses having an amplitude of 80.0 + 1.0 DC volts. The output voltage shall return to the level cpeci- fied in 3.4.4.3 within 125 milliseconds after removal of pu
12、lses. II Paragraph 3.4.4.3, Delete and substitute: “3.4.4.3 Output voltage.-The regulator shall deliver a dc voltage of 2.5 + .3 volts with a rise time of 0.3 seconds or less upon opening test shutter switch.“ Page 2 of 4 L .-.- _-_-.- ._.-.-. .-. . . . -. . -_ , -. . ,_.- I . -.“ 2. . i -. . I.-. .
13、 - . . .- . . . .- . . I l Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-PAGE 10 Paragraph 4.5,. 7.4.1, Delete and substitute: “4.5.7.4.1 input voltage surge.-utilizing a pulse generator connected to the input terminals, adjust the ou current to 50
14、0 + 25 ma. Apply the pulses specifled in 3.4.4.1. A series of five pulses shall be applied at a r five per minute. The output voltage and recovery time af removal of pulses shall be as specified in 3.4.4.1.“ of FIGURE 1 Delete and substitute new FIGURE 1. Cu s t od ian : Army-AR Preparing Activity:
15、Army-AR Project Nuaber: 1240-A728 tput ate ter Page 3 of 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-LI8577 (1) 12 m 777770b 0321847 b = _ . . . . . . . . . . _ . . . . . . -.- .-.- . . . . . . -_ _. . ._-. . . . . -.- . _ -.- -.-. . .-I_
16、 , . , . -. . .- - -. . _. . . *.- . . . . - . -.-_ - . . . . . . . MIL-R-48577 (AR) AMENDMENT 1 m 18-30V AMMETER +- I REGULATOR 1 I J p“lOYs 2w 50 OHMS 2w - + 10% TEST SHUTTER I J FIGURE 1 Page 4 of 4 I VOLTMETER o sc ILL0 SCOPt AS APPLICABLI AND /OR SWITCH . . . . . . - . -._ . _. . -. lll_-lll.-
17、 -._._ . -.-.*. .*.-.-I. . - _. - . . . . . . -.- . . . . . -. . . 1-1 . . ,-.-.-.- . .-.-. _ . _. - . . . . . . - .-_- . . . -._ - . _._._ . _._- _.-._. . -. . . . . ._.- . . . _- . - -.- _- . . . .- . . . ._ -. . . . . . . I , - . i. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
