1、INCH-POUND I MIL-C-l5952G(SH) 25 Mav 1988 SUPERSEDING 18 June 1964 (See 6.8) MIL-C-l5952F(SHIPS) MILITARY SPECIFICATION COMPASS, GYRO, MINIATURE This specification is approved for use within the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agenci
2、es of the Department of Defense. 1. SCOPE 1.1 ScoDe. This specification covers the requirements for a miniature gyro compass to furnish true heading indications. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 SDecifications and standard. The following specifications and standard form a part
3、 of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS MILITARY M
4、IL-S-901 - Shock Tests, H.I. (High-Impact); Shipboard MIL-C-5015 - Connectors, Electrical, Circular Threaded, General DOD-B-15072 - Battery, Storage, Lead-Acid, Portable Type 12V-15H - MIL-A-15303 - Audible Signals: Alarms, Bells, Buzzers, Horns and MIL-E-16400 - Electronic, Interior Communication a
5、nd Navigation Machinery, Equipment and Systems, Requirements for. Specification for. L/D - A or B. (Metric) Sirens, Electronic, Shipboard. Equipment, Naval Ship and Shore: cation for. General Specifi- Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of
6、use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I AMSC
7、 N/A FSC 6605 DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited Licensed by Information Handling ServicesMIL-C-15752G bb 777770b 0VV03b7 b D MIL- C - 15952G (SH) MILITARY (Continued) MIL-M-17413 - Motors, Direct Current, Integral H.P., Naval MIL-E-17555 - Electronic and El
8、ectrical Equipment Accessories, and MIL-S-20708 - Synchros, Control Differential Transmitter, Type Shipboard. Provisioned Items (Repair Parts): Packaging of. 26V - 11CD x 43. STANDARD MILITARY MIL-STD-710 - Synchros, 60 and 400 Hertz. (Copies of specifications and standards required by contractors i
9、n connec- tion with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.3 Order of Drecedence. In the event of a conflict between the text of this specification and the references cited herein (except for associated detail sp
10、ecifications, specification sheets or MS standards), the text of this specifi- cation shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified in the
11、 contract or purchase order, a sample shall be subjected to first article inspection (see 4.4 and 6.3). 3.2 PescriDtion. The miniature gyro compass equipment shall consist of the following: (a) Compass unit. (b) Control unit (may be integral with the compass unit). (c) Speed unit. (d) Alarm unit (fo
12、r single or multiple compass installation (e) Visual alarm (see 6.2.1). (f) Isolation transformer. (g) Power supply unit (see 6.2.1). (see 6.2.1). 3.3 General features. In addition to the requirements specified herein, the equipment shall be in accordance with MIL-E-16400. 3.4 Material. All parts, e
13、xcept those where strength or hardness is essential, shall be constructed of nonferrous, nonbagnetic materials. 3.4.1 Recovered materials. Unless otherwise specified herein, all equip- ment, material, and articles incorporated in the products covered by this specification shall be new and may be fab
14、ricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the Licensed by Information Handling ServicesMIL-C-15952G bb 9 999990b 0440370 2 intended use. The term “recovered materials“ means materials which have been collected or recovered form s
15、olid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. None of the above shall be 3.5 Construction. The miniature gyr
16、o compass equipment shall operate from a 3-phase, 115-volt, 400-hertz (Hz) supply with tolerances specified in MIL-E-16400. excluding the power supply unit shall not exceed 400 volt amperes. entrance into enclosures shall be either by stuffing tubes or AN type connectors in accordance with MIL-C-501
17、5. Enclosures shall be dripproof. The compass equipment shall not be damaged by failure of power to the equipment. Components shall pass the vital equipment vibration requirements of MIL-E-16400 as specified herein. for lightweight equipment as specified herein. Internal resilient mounts may be used
18、 in the compass unit or in an integral compass and control unit only to meet the shock requirement. External resilient mounts shall not be used. Total 400-Hz power requirements to operate the compass equipment Cable Components shall pass the type A high shock requirements of MIL-S-901 3.5.1 ComDass
19、unit. The compass unit shall, by means of a gravity con- trolled gyroscope responsive to earth rates, continuously seek and indicate the true meridian. The true heading of the carrier (a vehicle or ship) shall be readable from an integral dial of the compass unit. with a protective enclosure constru
20、cted for three-point deck or shelf mounting. Mounting holes shall provide for plus or minus 5 degrees adjustment. aft line so marked shall be engraved on the base of the enclosure to facilitate alignment to the carriers centerline. The fore and aft alignment marks shall be referred to the innermost
21、heading reference alignment mark within plus or minus 6 minutes of arc. The compass unit shall perform as a gravity controlled gyroscope at any latitude between 75 degrees south and 75 degrees north. At latitudes over 75 degrees to the poles, the compass unit shall perform as a dependable direction
22、indicating gyro with a drift rate not in excess of 0.06 degree per hour. This unit shall be provided A fore and 3.5.1.1 Maenetic field. The compass unit shall indicate true heading with an error not to exceed plus or minus 1.5 degrees when the unit is subjected to a magnetic field of 10 gausses. 3.5
23、.1.2 Maximum rate of turn. The follow-up system of the compass unit shall turn in azimuth at any rate up to 100 degrees a second. The follow-up shall be fitted with alarm contacts which will indicate failure of the follow-up system by means of an indicator lamp on the control unit. The compass equip
24、ment shall not be susceptible to damage upon failure of the follow-up system (see 4.7.9). . 3.5.1.3 Settling. Means shall be provided for electrically leveling and A tilt indicator shall be provided slewing the gyroscopic element of the compass unit so that it can be leveled and set within 10 degree
25、s of the true heading. either on the compass unit or on the control unit. the settling test specified in 4.7.1. The compass unit shall meet 3.5.1.4 Noise. The gyro compass equipment shall withstand the tests for airborne audible, structure-borne and radio frequency noise specified in 4.7.13. License
26、d by Information Handling ServicesMIL-C-15752G bb 997970b 04403?L 4 3.5.1.5 Bearinns. The gyro rotor or rotors shall be constructed for a minimum life expectancy of 15,000 hours. 3.5.1.6 Rotor vibration. The gyro rotor or rotors shall operate from a zero speed to 15 percent overspeed without any cri
27、tical periods of vibration in the operating range or any objectionable critical periods throughout the entire range. 3.5.1.7 Roll and Ditch clearance. The-compass unit shall be operable under conditions of a roll of 45 degrees or a pitch of 45 degrees on each side of the vertical. 3.5.1.8 SDeed and
28、course. The effect of the carriers speed and course on the true heading indication shall be automatically compensated for the gyroscopic element to indicate the true meridian instead of the dynamic meridian. of change of latitude on the true heading indication shall be compensated for by the manual
29、introduction of latitude signals in the control unit. Effects 3.5.1.9 Pitchacceleration. The compass unit shall be not adversely affected by pitch accelerations up to 1,000 degrees per second and pitch velocities up to 50 degrees per second. affected by a fore and aft horizontal acceleration of 1 gr
30、avity (g) of 2 seconds duration or by a momentary fore and aft horizontal acceleration of 3 gs. In addition, it shall be not adversely 3.5.1.10 -n. The compass unit shall transmit heading at 1 and 36 speed. in accordance with MIL-S-20708 and MIL-STD-710. The synchro transmitters shall be 18TR4 stand
31、ard Navy synchros 3.5.1.11 Adiustment Drotection. Provision shall be made for preventing unauthorized changing of the compass unit adjustments. 3.5.1.12 Size. The size of the compass unit with or without and integral control unit shall not exceed a nominal 2 cubic feet. 3.5.2 vunit. The control unit
32、 shall contain the amplifiers, computer circuitry, power supplies, meters, alarm indicator lights and switches to control and monitor compass operation. unless made integral with the compass unit, shall be constructed for three-point bulkhead mounting. The volume of the control unit shall not exceed
33、 a nominal 1- 1/4 cubic feet. The enclosure for the control unit, 3.5.2.1 Accessibility. The power supplies and amplifiers shall be remov- able for examination and testing with plug and jack connections. Test cables 10 feet long fitted with proper connectors to allow the removable subassembly to be
34、electrically connected to the control unit shall be included unless the front cover of the control unit is arranged to serve as a service platform. In the latter case, the plug half of the connector may be fitted with a shorter electrical cable which will allow servicing the subassemblies on the fro
35、nt cover. 3.5.2.2 ODeratine knobs. Operating knobs on the control panel shall be constructed or protected so that accidental contact will not disturb them or change their setting. a knob and scale on this unit. Introduction of latitude compensation signals shall be by 4 Licensed by Information Handl
36、ing ServicesMIL-C-LS952G bb 999990b OYY03172 b MIL-C-L5952G(SH) 3.5.2.3 Instructi on plates. Instruction plates shall be placed on the control unit where necessary. 3.5.2.4 Electron tubes and solid state semi -conductor devices. For power rectification, solid state semi-conductor devices shall be us
37、ed instead of electron tubes. 3.5.3 heed unit. The speed unit shall, to facilitate making the speed compensations specified in 3.5.1.8, accept a 60-Hz, O to 40 knot synchro input where 9 degrees of synchro rotation equal 1 knot. The speed unit shall generate a signal proportional to speed as require
38、d by the design of the compass equip- ment. This unit shall be in an enclosure suited for three-point bulkhead mounting . 3.5.3.1 SDeed inDut. Provision shall be made to manually insert the speed input, using a dial calibrated O to 40 knots. 3.5.3.2 u. The size of the speed unit shall not exceed a n
39、ominal 1/8 cubic foot. 3.5.4 Alarm unit. The alarm unit shall consist of necessary relays and components to actuate one or more audible alarms like the B5DSF4 bell of MIL-A-15303 and one or more visual alarms in the event of failure in a synchro signal amplifier, which is used with, but is not a par
40、t of, the compass equip- ment, or when certain critical circuits or functions of the compass equipment become inoperative, operate under par, or when there is a power failure. For a multiple compass installation the alarm unit shall contain the necessary com- ponents to, in addition to the above, ac
41、tuate the audible or visual alarms upon closure of an external alarm circuit in any one of the compass systems installed. 3.5.4.1 Size. The size of the alarm unit shall not exceed a nominal 1/6 This unit shall be constructed for three-point bulkhead mounting. cubic foot. 3.5.5 Visual alarm. The visu
42、al alarm shall contain one or more lights. A steady light shall indicate normal functioning of the compass, power supply or synchro signal amplifier; a flashing light shall indicate an alarm condition in a compass, in a synchro signal amplifier or failure of the power supply. 3.5.5.1 Size. The visua
43、l alarm shall be not larger than a nominal 1/6 cubic foot. The alarm shall be constructed for three-point bulkhead mounting. 3.5.6 Isolation transformez. The isolation transformer shall be provided for interposing between the carriers 115 volt, 3-phase, 400 Hz supply and the compass equipment. 3.5.7
44、 Power SUDDV unit. A static type power supply unit and appropriate controls shall be furnished to automatically provide 400-Hz power to the compass and loads on the compass transmitters to keep the compass and those loads operating normally during periods of ships supply failure or intolerably low v
45、oltage or low frequency in the ships supply. be constructed so that for ships voltage and frequency values below the lower limits in MIL-E-16400 the unit will operate from a 120 volt direct current (Vdc) The unit and its controls shall 5 Licensed by Information Handling ServicesMIL-C-15952G bb 99999
46、06 OLiLi0373 8 source (type BB255/, BB252/, or BB256fl batteries of DOD-B-15072 or a rec- tifier). The unit shall be automatically switched to charge the batteries upon restoration of normal ships power. The unit shall be suited for continuous operation when operating from ships supply or from a dir
47、ect current (dc) supply. (When used with a rectifier the power supply unit shall not furnish power to or through the rectifier to other loads on the rectifier.) damaged if connected for an indefinite period of time to partially or fully discharged batteries and the compass equipment shall not be dam
48、aged when dependent on the power supply unit during this time. from discharged batteries shall not be dependent on fuses or circuit breakers. The unit in addition to supplying the power required to operate the compass equipment shall supply an additional 250-watt, 0.8 power factor (p.f.), 1-phase, 4
49、00-Hz external equipment load. The total harmonic content of the output of the unit shall be not more than 5 percent of the fundamental and the maximum of any one harmonic shall not be more than 2 percent of the fundamental. be not less than 60 percent efficient when operating from the ships supply and not less than 70 percent efficient when operating from a dc supply. Voltage and frequency regulation when the unit is operating from dc in the range 105 to 120 volts shall be plus or minus 2 volts and plus or minus 2 Hz for no load to full load. operating from any ships supply vo
