1、MIL-E-85051- 59 9Ob 008LA54 3 *q I MTGE-85051 (AS) 9 March 1977 MI L ITARY SPEC I F I CAT I ON ENCODERS, SHAFT POSITION TO DIGITAL, NON-CONTACT TYPE, ALTITUDE REPORTING This specification is approved for use by Naval Air Systems Command, Department of the Navy, and is available for use by all Depart
2、ments and Agencies of the Department. of Defense. 1. SCOPE 1.1 This specification covers the requirements for multi-turn non- contact type altitude reporting encoders. 1.2 Classification. The encoder shall be one of the following types: TABLE I. Encoder type classification. Power Cod e Number of Tur
3、ns See C1 ass Input Range for Full Range Figure Type 5 1 A 28 VDC -1200 ft, to A 28 VDC -1200 ft. to B 115V, 400 Hz +126,700 ft. Type 1 B 115V, 400 Hz +38,700 ft. Type i1 16 2 - 2. APPLICABLE DOCUMENTS 2.1 General. The following documents, of the issue in effect on date of invitation for bids or req
4、uest for proposal, form a part of the specification to the extent specified herein. SPEC I F IC AT I ONS M I L ITARY MIL-GJ-16878 -Wire, Electrjcal , Insulated, High Temperature Beneficial comments (recommendations, additions, del et ions) and any pertinent data which may be of use in improving this
5、 document should be addressed to Commander, Naval Air Systems Command (AIR-52022), Department of the Navy, Washington, D. C. 20361 by using the self- addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. THIS DOCUMENT CONTAINS .=,
6、PAGES. FSC 5990 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-85051 (AS) ISPECIFI CATIONS MILITARY (Continaed) MIL-T-18303 MIGN-18307 MIGS-19500 MIGI-81400 SIANDARDS MIGSTD-105 MIL-S-E-l.43 MILr STD-454 MIL-STD-461 MIL-STD-462 MIL- STD- 463 M
7、IL- STD- 7011 MIL-STD-794 -Test Procedures; Procedures; Preproduction, Acceptance and Life for Aircraft, Electronic Equipment; Format for Electronic and Associated Equipment -Nomenclature and Identification for Aeronautical, -General Specification for Semiconductor Devices -Instruments, Aircraft, Ge
8、neral Specification for -Sampling Procedures and Tables for Inspection -Specifications and Standards, Order of Precedence -Standard General. Requirements for Electronic -Electromagnetic Interference Characteristics, -Measurement of Electromagnetic Interference -Definitions and Systems of Units, Elec
9、tromagnetic -Electric Power, Aircraft, Characteristics and -Parts and Equipment Procedares for Packaging and -Environmental Test Method for Aerospace and Ground by Attributes for Selection of Equipment Requirements for Equipment Characteristics Interference Technology Utilization of Packing of Equip
10、ment 2,2 Other Publications, The following documents form a part of this specification to the extent specified herein, Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply, NAVAL AIR sxmms COMMAND AR- 5 -Microelectronic Device Used in Avi
11、onic Equipment Procedures for selection and approval of (Copies of specifications, standards, drawings , and publications required by contractors in connection with specific procurement functions shall be obtained form the procuring activity or as directed by the contracting officer,) Provided by IH
12、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEPARTMENT OF DEFENSE SD-6 - Provisions Governing Qual ifications (Application for copies should be addressed to Commanding Officer, Naval Publications and Forms Center, 5801 Tabor Avenue, Philadelphia, Pennsylvania
13、19120.) DEPARTMENT OF TRANSPORTATION ORDER 1 O1 O. 51 - U. S. National Aviation Standard for the IFF Mark X (SIF)/Air Traffic Control Radar Beacon System Characteristics SIF/ATCRBS (Application for copies should be addressed to the Federal Aviation Administration, Washington, D. C. 20553.) 3. REQUIR
14、EMENTS 3.1 Qualification. The encoders furnished under this specification shall be products which have been tested and meet the quality assurance provisions specified herein and have been listed on or approved for listing on the applicable qualified products list. -* 3.2 Parts and materials. Selecti
15、on and use of parts, materials and processes shall be in accordance with MIL-S-19500, MIL-1-81400 and AR-5. Specifications for items not covered above shall be selected in accordance with MIL-STD-143 e 3.3 Design and construction. The encoder specified herein is a multi-turn non-contact encoder whic
16、h converts analog shaft position into coded digital form iri accordance with: U. S. National Aviation Standard for the IFF Mark Air Traffic Control Radar Beacon System Character SI F/ATCRBS . 3.3.1 Outline dimensions. The outline dimensions of shall be in accordance with Figures 1 and 2. -. X(SIF)/
17、stics he encoder 3.3.2 Weight. The weight of the encoder shall not exceed eight ounces, including external power supply , if used. 3.3.3 Code range, Encoder types I and II shall have the code ranges specified in paragraph 1 .2. 3.3.4 Resolution. The encoder resolution shall be 80 discrete counts for
18、 360“ rotation of input shaft. Each count shall be equivalent to 100 feet of altitude change with the code starting at -1200 feet of altitude. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-BS05L 53 9999906 0083857 9 m MIL-E-85051 (AS) 3.3.5
19、 Shaft rotation and code output. The direction of rotation for increasing count, as viewed from the shaft end of the encoder, may be clockwise or counterclockwise. count (increasing altitude) shall be as specified in the contract. The direction of rotation for increasing 3.3.6 Stops. The encoder sha
20、ll contain no mechanical stops. The 3.3.7 Starting torque. The encoder shall have a starting torque not input shaft shall be capable of continuous rotation in either direction. to exceed 0.5 inch-ounce at -54 + 2C and at +71 -t 2C in any attitude when tested in accordance with paragraph 4.5.10. The
21、encoder shall have a running torque not to exceed 0.3 inch-ounce at -54 + 2C and at +71 + 2C in any attitude when tested in accordance with paragraph 4.5.10. - 3.3.8 Running torque. - 3.3.9 Operating speed. The encoder shall be capable of operating at a speed of 15 RPM. 3.3.10 Slew speed. The encode
22、r shall be capable of withstanding slew speeds of 20 RPM. 3.3.11 Radial play. Radial play shall not exceed 0.0015 TIR maximum on the input shaft, measured at 0.250 inches from the nearest mounting surface under a load of eight ounces applied to the shaft as described in paragraph 4.5.5. 3.3.12 Shaft
23、 run-out. The shaft run-out exceed .O01 TIR when tested in accordance w 3.3.13 End play. The input shaft of the not exceeding 0.004 inches measured with an described in paragraph 4.5.7. 3.3.14 Wire leads. 3.3.14.1 Ni re 1 ead identification. with teflon-insulated leads color coded shall conform to M
24、IL-W-16878/6 and shal minimum). The length of the wire leads con trac t. or eccentric th paragraph encoder shal ei g ht ounce ty shall not 4.5.6. have end play oad applied as he encoder shall be provided as shown in Table II. The w be #28 AWG (seven strands shall be as specified in the re 3.3.14.2 W
25、ire lead stress. Each lead shall be able to withstand a 3.3.15 Code source and sensors. two pound pull when tested in accordance with paragraph 4.5.4. sources shall be connected in a series string such that if any one source fails, the series string fails. devices) shall be electrically tied to the
26、bit common lead as shown in Figure 4. If more than one source is used, the The sensors (code switching 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE II. Identification of wire leads. . Encoder Bi t bit common D2 D4 A2 A4 B1 B2 B4 cl c2 c4 P
27、WR Supply Internal or External NOTE : Col or black whi te/purple tracer whi te/bl ue tracer whi te/yel 1 ow tracer whi telorange tracer whi te/brown tracer gray purpl e blue ye1 1 ow orange brown Pos it i ve power 1 ead Po wer common white Case ground if necessary green red The white lead (power com
28、mon) shall float with respect to case ground; i.e., the green and white wire leads shall not be connected internally. 3.3.16 External power supply. Power to the electronics portion of an encoder may, if necessary, be supplied by an external power supply as specified in paragraphs 3.3.16.1 and 3.3.16
29、.2. This external power supply shall be considered as part of the encoder and must meet all environmental requirements of the encoder. If no external power supply is required for operation of the encoder, the encoder shall operate with the input voltages specified for the external power supply. supp
30、ly input voltage shall be either 28 VDC or 115V, 400 Hz as specified in the contract and paragraph 3.3.16.2. The power 3.3.16.1 External power supply configuration. The configuration of the external power supply, if used, shall be as specified in the con- tract and in Figure 3. 5 Provided by IHSNot
31、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-85051 (AS) 3.3.16.2 Input power requirements. The external power supply shall operate on a voltage of 28 VDC + lo%, at 50 mA maximum, or when designed to operate at 115V, 400 Hz, the-maximum input current shall not
32、exceed 25 mA. 3.3.17 Insulation resistance. The encoder shall withstand a voltage of 200 VDC applied between each bit lead and the case as described in paragraph 4.5.14. meet the requirements of paragraph 4.5.14. If an external power supply is required, it also must 3.3.18 Dielectric strength. The e
33、ncoder shall withstand a voltage of 200 VAC, 60 Hz, applied between all leads and the case as described in paragraph 4.5.15. If an external power supply is required, it also must meet the requirements of paragraph 4.5.15. 3.3.19 Electromagnetic interference. The encoder and its external power supply
34、, if required , chal 1 meet the requirements of MIL-STD-461 , Class lC, when tested in accordance with paragraph 4.5.18. The defi- nition and system of units shall be in accordance with MIL-STD-463. 3.3.20 Life. The encoder shall have a minimum life of 1,500,000 shaft revolutions at a test rate of 1
35、5 RPM. as specified in paragraph 4.5.28. The test shall be conducted 3.4 Performance. 3.4.1 Transition accuracy. Each at 4 1/2“ intervals, - + 27 minutes o paragraph 4.5.11. 3.4.2 Transi tion gradient. When 4.5.12, the transition qradient (or exceed 14 minutes of arc (five feet encoder code transi t
36、ion chal 1 occur arc, when tested in accordance with tested in accordance with paragraph sharpness of switching) shall not for the current to change from 20% to 80% of its full conducting value, i.e. , a current change f 0.5 mA to 2.0 mA for a 2.5 mA “ON“ current and vice versa. shall occur within t
37、he - +27 minutes of arc tolerance specified in para- graph 3.4.1. paragraph 4.5.13 , the “ON; (conducting) state output voltage drop shall not exceed 6.25 VDC with a source current of 2.50 + 0.05 mA and shall not exceed 2.0 VDC with a source current of 0.5 2 0.05 mA. The “OFF“ (non-conducting) state
38、 current shall not exceed 200 UA at 30.0 + 0.1 VDC. The transition gradient 3.4.3 Encoder output characteristics. When tested in accordance with - 3.5 Envi ronmental . 3.5.1 Temperature altitude. The encoder shall be capable of opera- tion from -1200 to 38,700 or 126,700 feet altitude, as applicable
39、, in combination with any temperature from -54 + 2C to +71 + 2C. encoder shall meet the requirements specifTed when tested in accordance with paragraphs 4.5.19 and 4.5.20. The 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-Ek85051 (AS) 3.5.2 V
40、ibration failure. The vibration failure test shall be per- formed in accordance with MIL-STD-810, Method 514.2, Procedure l, Categories 61 and C, Part 2, Figure 514.2-2, Curve H, Frequency 5-2000 Hz, 106. Operational performance of the encoder during and after this test shall be as specified in para
41、graph 4.5.17. The encoder shall be capable of operation in an atmosphere of 100% relative humidity. After testing in accordance with paragraph 4.5.21, the encoder shall meet the requirements of paragraphs 3.3.7, 3.3.8, 3.4.1 and 3.4.2. presence of a sand and dust laden atmosphere. dance with paragra
42、ph 4.5.22, the encoder shall meet the torque require- ments of paragraphs 3.3.7 and 3.3.8 and the performance requirements of paragraphs 3.4.1 and 3.4.2. 3.5.5 Fungus. The encoder shall be capable of operation after exposure to fungi. the encoder shall meet the requirements of paragraphs 3.3.7, 3.3.
43、8, 3.4.1 and 3.4.2. There shall be no deterioration of the encoder per- formance as a result of this test. 3.5.3 Humidity. 3.5.4 Sand and dust. The encoder shall be capable of operation in After testing in accor- After testing in accordance with paragraph 4.5.23, 3.5.6 Salt fog. The encoder shall be
44、 capable of withstanding atmos- pheres with salt-laden moistures. After testing in accordance with paragraph 4.5.24, the encoder shall meet the requirements of paragraphs 3.3.7, 3.3.8, 3.4.1 and 3.4.2. There shall be no evidence of corrosion or deterioration of the encoder performance as a result of
45、 this test. 3.5.7 Acceleration. The encoder shall be capable of withstanding 206 accelerations for a period of one minute in any attitude. After testing in accordance with paragraph 4.5.25, the encoder shall meet the require- ments of paragraphs 3.3.7, 3.3.8, 3.4.1 and 3.4.2. evidence of deteriorati
46、on of the encoder performance as a result of this test. There shall be no 3.5.8 Mechanical shock. The encoder shall be capable of withstanding shock blows at an acceleration of 206 of ten millisecond duration. After testing in accordance with paragraph 4.5.26, the encoder shall meet the requirements
47、 of paragraphs 3.3.7, 3.3.8, 3.4.1 and 3.4.2. 3.5.9 Temperature shock. The encoder shall be capable of withstanding sudden temperature changes between t71 5 2C to -54 t 2C as defined in Method 503 of MIL-STD-810. 4.5.27, the encoder shall meet the requirements of paragraphs 3.3.7, 3.3.8, 3.4.1 and 3
48、.4.2. There shall be no evidence of deterioration of the encoder Performance as a result of this test. After testing in accordance with paragraph 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.5.10 Identification. required, shall each be i confo
49、rm to MIL-N-18307. shall be provided on the The encoder and external power supply, if dentified with a name plate. Markings shall In addition, the encoder wire lead color code name plate. The name plate shall withstand all I of the environmental tests required of the encoder without any loss of legibility or adhesion to the case. I 3.5.10.1 Encoder part numbers, Mi 1 i tary Part Numbers TY Pe C1 ass M 8505Ll I A M 85051-2 I B M 85
