1、,I L-C- I R 1 (r6F (SI1 IPS) Al1 I, -c - 1 o 1 06E (SI1 IPS) 10 July 1364 (See 6.3) tIILITARY SPCC 1 FI CAT IO!, COPIPASS, CSPO, YI 1:ICLI 1. SCOPE 1.1 This specification covcrs the technical desip a110 pcrfom.ance requirements for a direct reading and trnnsiiijtting vehicle gyro conipass to be uscd
2、 on U. S. havy ships, vehicles, and amphibious craft. 2. APPLICABLE LOCl!VI.STS 2.1 Thc olloring Cocwrmts of thc issue in effect on datc of invitation for bids or request for proposal, forn a part of thc specification to the extent spccificd herein. SPLCIFICATIOKS b1I L ITARY ;:IL-S-901 -Shock Tests
3、, H. I. (l!igh- Impact) : Sliibeard tlac1:inery. Lquip- ?lIL-1-963 -Interior Communication Cquipment , Laval Shipboard; Basic i!IL-D-lGOO/Z -Drawings, Enginecring an Associated Lists. !:il-Q-9YSS -Quality Prograri Requircments . ?:IL-E-17555 -Electronic and Llectrical EqUii.VCnt anti Associated Repa
4、ir ment and Systcns , Rcquircscrits for. Design Requircrwnts for. . Parts, Preparation for Delivery of. (Copies of spccifications, standards, drawings, aiid publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as direc
5、ted by the contracting officer.) to the extent specified herein. Unless otherwise indicated, the issue in effcct on date of invitation for bids or request for proposal shall apply. 2.2 Other publications.- The tollowing dociimcnt forms a part of this specification OFF IC IAL CLASS IF I CAT I ON COFl
6、t.IITTtT: Uniform Frcight Classification Ratings , Rules and Re.gulations (Apllication Tor copies should be addressed to Official Classificatioc Conmittee, 3. REQUIRBENTS 1 Park Avenue at 33rd Street, New York, S. Y. 10016). 3.1 Preproduction sanipie.- ifhen specified (see 6.1), a rreproductioa samp
7、le of 3.2 Descri tion.- The vehicle gyro compass equi;.ment sliiill consist of the following the vehicle gyro compass shall he furnished for thc tests in 4.3. or equivai-ration : (a) Compass unit. (b) Compass control and power inverter unit. (c) Electronic power converter unit, when required (see 6.
8、1). 3.3 General features.- The cquipnent shall be in accordance with NIL-1-983 in addition to t e requirements s ecified herein. Whenever a requirement of PIIL-983 con- flicts with ahrequirement of fluid 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-
9、,-,-MIL-C-LBLObF bb 0b 0129b53 r( m $11 L- C- 18 106 F (SHI PS) tcnperAture regulation, damage caused by fluid solidification and excessive internal pres- surr Jue to fluid expansion. Thc physical and chcnical characteristics of the fluid shall bc 3pecified in detail. Substitute fluids and supply so
10、urces shall be identified. a trouhlc frce life expcctancy of 10,000 hours. cycle clcctrical power. applied. The motor pcrfornnncc shall bc consistent with compass accuracy requirements under dynamic acceleration cnvironments existing on craft for which thc compass is in- tended. A motor overspeed of
11、 up to 15 percent shall not impair the operational reliability of the comPass or its parts. 5.5.1.5 The compass unit shall operate satisfactorily within the limits of allow- able error under all combinations of static and dynamic roll and pitch angles up to 45 degrees in amplitude. volumes. When the
12、 compass is a “top reading“ type, its overall height shall not exceed 10 inches. Khen the compass is a “side reading“ type, its overall height shall not ex- ceed 15 inches. 3.5.1.7 The compass shall be a direct reading and transmitting type having a minimum card diameter of 8 inches. The compass car
13、d shall have 1 degree markings in white against a black background. Ifhen internally illuminated during darkncss, the card markings and index shall appear as red markings against a black bachground. The intensity of illumination shall be controlled by dimmer to a maximum luminance of 0.25 foot lambe
14、rts or more. 3.5.1.0 When the card reading index is located aft of the card, the sequence of card tlelnsmans wheel. Card reading errors resulting from parallax shall be held to a minimum. The transparent cover through which the card is read shall not concentrate the reflection of external light sour
15、ces to an extent which would interfere with comfortable reading of the card. unit in the angular range of plus or minus 5 degrees. Slotted mounting holes are ac- ceptable for this purpose. The compass unit shall have scribe lines located forward and aft to function as alignment references. up to 70
16、degrees. The control and damping circuitry shall include the facility for simple modificatication which would extend the compass usefulness up to 80 degrees latitude. mounting atop the compass control and power inverter unit. Provisions for the attachment of eyebolts for the purpose of hoisting and
17、transporting the compass unit shall be in- cluded. require access to any internal elements of the equipment. External controls shall be provided for slewing and leveling the sensitive element. trol shall be external and readily accessible. displayed on a visual indicator. 100 degrees a second. A mal
18、function of the follow up system shall produce a visual alarm indication. 3.5.1.14 The compass unit shall not be damaged by power interruptions and shall continue .to perform with dependable heading indications immediately after power in- terruption intervals lasting 8 to 10 seconds under small angl
19、e scorsby conditions. The compass design shall include the facility and capability for simple installation of size 15 synchros operating at 1 speed or 1 and 36 speed and 60 or 400 cycle synchro excitation. 5.5.1.3 5.5.1.4 The spin motor which drives thc gyro whccl shall operatc on polyphase 400 Thc
20、gyro rotor bearings shall be of the highest grade obtainable to insure lic motor shall start automaticlly when electrical power is 5.5.1.6 The compass unit shall not exceed 70 pounds in weight and 1.5 cubic feet in markings and its direction of rotation shall agree with the steering sense of the 3.5
21、.1.9 Means shall be provided for adjusting the heading orientation of the compass 3.5.1.10 The compass unit shall be suited for operation in all geographic latitudes 3.5.1.11 The compass unit shall be designed for deck mounting and for intergral 3.5.1.12 Normal operation of the compass including sta
22、rtup and settling shall not The caged or uncaged condition shall be When provided, the caging con- 3.5.1.13 The follow up system shall function satisfactorily at turning rates up to 3.5.1.15 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-L8L
23、ObF bb 999990b 0229b5ir b m 3.5.2 Conpass control nnl! youcr inverter unit.- 3.5.2.1 This unit sli.ill contain the compass electronic control circuitry and oper- ating controls necessary for startup and continous opcration of the equipment. Provision shall be made for visual alam indication of power
24、 and follow-up failure. Visual in- dication of caged condition shall bc included. Relay controlled normally closed contacts having a current rating of 5 amperes shall be provided for the purposes of a remote ships alam system. The illumination of the visual indicators shall not meet dark adaptation
25、requirements and shall also be visible under daylight conditions at distances up to 10 cet. anical protection of exposed components such as sicitch toggles, knobs, dials and indica- tors. be indicated continously on a ncter at,the control unit when tilt readout is not provided at the compass unit. 3
26、.5.2.4 Thc compass control power inverter unit shall not weigh note than 30 pounds nor exceed 1/2 cubic oot in volume. The unit shall be designed for bulkhead and deck mounting. the compass unit. 3.5.2.5 output shall provide the iiecessary 3 phase 400 cycle power required for operation of the compas
27、s. It shall also provide electrical excitation for a 15CX4 synchro and an addition- al 50 watts (0.8 p.f.), 400 cycle auxilliary power to operate a remote servo type re- peater. accurate operation of the synchro and repeater load. power inputs in the range of 23 to 28 volts and not exceeding 300 wat
28、ts. power shall be dervied fron cithcr a battery supply or from the converter unit. 3.5.2.7 The power iiiverter shall be designed for continuous operation. It shall :;aut maximum practical cficiency and a riinimr life of 40,000 hours. shall be made to suppress input voltage spikes or switching trans
29、ients of a maximum of GOO volts to a safe value required for protection of internal circuit elements and semiconductors. in 3.5.4.1 and 3.5.4.6 when the inverter input varies randomly in the range of 23-28 volts d.c. 3.5.2.2 The design shall incorporate a recessed panel or equivalent for the mech- 3
30、.5.2.3 The magnitude and sense of compass tilt during startinz anG running shall The top of the unit housing shall have mountin: provisions for attachment of The power inverter shall be an uncrounded static all solid state type whose Thc amplitude, frequency and waveforrr, of this auxilliary power s
31、hall permit The power inverter shall be designed for satisfactory operation with d.c. 3.5.2.6 The input ProYision 3.5.2.8 The compass performance accuracy shall agree with the tolerances specified 3.5.3 Converter unit.- 3.5.3.1 The converter unit shall contain the solid state electronic components a
32、nd circuits necessary for the conversion of 1-phase, 115 volts, 60-cycle or 400-cycle input to 24 volts J.C. output required for the operation of the power inverter. 3.5.3.2 The compass shall conform to the accuracy requirements of 3.5.4.1 and 3.5.4.5 when the converter unit input power variation is
33、 within the following tolerances: 115 volts plus or minus 10 percent, 60-cycle or 400-cycle frequency plus or minus 5 per- cent. 3.5.3.3 The converter unit shall not weigh more than 30 pounds or exceed 1/2 3.5.3.4 A power-on indicating light shall be provided on the converter unit. 3.5.3.5 The conve
34、rter unit shall be bulkhead mounted but shall also include port- ability features for easy handling when it is not mounted permanently. 3.5.3.6 The power converter shall be an ungrounded static type having designed rnximum efficiency. have circuit protection features including short circuit and over
35、load protection, as well as the suppression of transients to insure protection of internal circuit elements. cubic foot volume space. It shall be designed for a minimim life of 40,000 hours and shall 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
36、MIL-C-L8LDbF bb 979990b 0229b55 8 D !.:I L-C- 18 106F (SI11 PS) 3.5.4 Operation. - 5.5.4.1 The following data, as applicable to the equipment units shall be supplied by thc contractor prior to delivery of the first shipcnt of each mark and modification of the contract or order: (a) :laxinum power .
37、Watts (b) Plsximun current. Amperes (c) Power factor Units (e) Average dnriying 7ercentage shall be . Percent (f) Average coir.pnss period Ninutes (d) lieat dissipation in each component Watts 3.5.4.2 Tlic equipiiciit shall operate, except as syccifier! iii 3.5.4.3 within the accuracy linits specifi
38、ed in 3.5.4.5 at any ambient temperature betneen the limits of plus 20F. and 149F. iloterials used shall conform to standnrci Kavy requirements for classes :I, li, and C insulation in accordance with tIIi,-I-3S3 and hot spot temperatures shall not exceed standard Kavy established limits for these cl
39、asscs of insulation in each specific appl icat ion. 149F. twice the tiirntnble error shall he allowed. 3.5.4.3 At tec;peratures between minus 35F. ar,d plus 20F. and between llOF. and 3.5.4.4 The equipcent shall not suffer permanent ciornage when stored at any tcmper- ature from minus 8O0F to 180F.
40、and shall he capable of neeting the requiremepts of * 4. ?. 10.2 for exposed locations. error values indicated are naxinum allowable overall errors including scttling point error 3s specified in 4.7.4. Table I - Limits of allowable error. 3.5.4.5 The limits of allowable error shall bc as shown in ta
41、ble I. All limiting I Liniting values I (error in degrees) !ame of test I Voltage and frequency variation Turnt ab 1 c Small angle Scorsby Large angle Scorsby Effect o magnetic fields Settling point (error) (Plus or minus) 3 2 3 4 4 1.5 3.5.4.6 When the equipment is operate from a 24 volt d,c, or 11
42、5-volt, 1-phase, 60 or 400 cycle supply (see 3.5.3), the equipnent operating conditions and accuracy shall be within the limits specified in 3.5.4.1 and 3.5.4.5, for a randon! variation between 23 and 28 volts in the 24-volt d.c. supply or for an oscillatory random variation in the 60 or 400 cycle,
43、1-phase, 115-volt supply of plus or minus 10 percent in voltage and plus or minus 5 percent in supply frequency. 3.6 Drawin s.- Drawings shall conform to biIL-D-1000/2 and the detailed requirements 4. QUALITY ASSURAXCE PROVISIONS of !II.- 1-9+ 4.1 Responsibility for inspection.- Unless otherwise spe
44、cified in the contract or purchase order, the supplier is responsible for the performance of all inspection re- quirements as specified herein. Except as otherwise specified the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Gov- ernment reserv
45、es the right to perform any of the inspections set forth in the specifica- tion where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. quality program acceptable to the Government. The program shall be in accordance with MIL-9-9858. The suppli
46、er is in no way relieved of the final responsibility to furnish compasses meeting the requirements of this specification. 4.1.1 uality program requirements.- The supplier shall provide and maintain a 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
47、MIL-C-LLObF bb = 999990b 0329b5b T m :II 1.- C - 18 106F (SI11 PS) 4.1.2 Government verification.- All quality assurancc Terations performed by the contractor will be siihiect to Govcrnmcnt verification at an? time. Verification will _. consist of (a)-surveiliance of tlic operations to deterriinc th
48、at practices, methods, and procedures of thc writtcri systen description are bcinl: fropcrly applied, and (II) Government product inspection to mensurc quality o prodiict to bc orfcred for acceptancc. Failure of the contractor to prosiptly correct deficiencies discnvcrec by hin or of w!.ich lie is n
49、otified shall be cause for suspension of acceptancc until correctivc action has been maire or until conformance of product to prescribed cri teria has Iwcn deronstrateci. be performcd on tlic equipnicft shall be as slcciiecl hcrcinnfter. The attention of the nanufacturer is invited to tlic applicable pnrngrnp?is of i:JL-I-983 for information concern- ing these tests. ,111 crrnr liiliits arc plus or minus mannitudes an2 art mnxiriur allowable overall errors incluclin: scttliiiz
