SJ 20656-1998 General specification for shipborne anti-submarine helicopter airborne radar
Some standard content:
Military Standard of the Electronic Industry of the People's Republic of China FL 5841
SJ 20656 —1998
General specification for radar installed irshipborne anti-submarine helicopter
General specification for radar installed irshipborne anti-submarine helicopter Issued on March 11, 1998
Implemented on May 1, 1998
Approved by the Ministry of Electronics Industry of the People's Republic of China Scope
1.1 Main Contents Military Standard of the Electronic Industry of the People's Republic of China General Specification for Radar Installed in Shipborne Anti-Submarine Helicopter General Specification for Radar Installed in Shipborne Anti-Submarine Helicopter SJ20656—1998
This specification specifies the general technical requirements, quality assurance regulations and delivery preparation for the radar installed in shipborne anti-submarine helicopter. 1.2 Scope of Application
This specification applies to the radar installed in shipborne anti-submarine helicopter (hereinafter referred to as anti-submarine radar). 2 Reference documents
GJB 86.1 --- 86
GJB 145A — 93
GJB 150.1 - 86
GJB 150.3 — 86
GJB 150.4 - 86 | |tt | 86
GJB 150.18 — 86
CIB 151.2 — 86
GJB 152 — 86
GB 179 — 86
GJB 181 — 86
GJB 441 86
GJB 457 - 86
General rules for tactical performance finalization test procedures for airborne fire control radars Specification for protective packaging
General rules for environmental field test methods for military equipment
Environmental test methods for military equipment High temperature test Environmental test methods for military equipment Low temperature test Environmental test methods for military equipment Temperature shock test Environmental test methods for military equipment Humidity test Environmental test methods for military equipment Mold test Environmental test methods for military equipment Salt spray test Environmental test methods for military equipment Acceleration test Environmental test methods for military equipment Vibration test Environmental test methods for annual equipment shock test Requirements for electromagnetic emission and sensitivity of military equipment and subsystems Requirements for mechanical equipment and subsystems (including corresponding ground auxiliary equipment) (Class A1) Count sampling inspection degree and table for electromagnetic emission and sensitivity measurement of military equipment and subsystems
Aircraft power supply characteristics and requirements for electrical equipment Installation form and basic dimensions of chassis and mounting racks for airborne electronic equipment General specifications for airborne electronic equipment
Published on March 11, 1998 by the Ministry of Electronics Industry of the People's Republic of China 1998-05-01 Implementation
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GIB 889.2 93
GJB 889 90
GJB 1765 — 93
GJB 2072 94
SJ 206561998
Test methods for radar receiving subsystem Dynamic range, image frequency suppression system, gain, bandwidth
Reliability identification and acceptance test
Military material packaging marking
Maintainability test and assessment
MTILSTD-1553B Aircraft internal time division command/response multiplexed data bus 3 Requirements
3.1 Qualification identification
Products submitted in accordance with this specification shall be products that have been qualified or approved by the finalization. 3.2 Reliability
Unless otherwise specified, the mean time between intentions (MTBF) of the anti-submarine radar shall not be less than 80h. 3.3 Maintainability
Unless otherwise specified, the mean time to repair (MTIR) of the anti-submarine radar shall not be greater than 15min (excluding the antenna). 3.4 Performance
3.4.1 Working mode
Unless otherwise specified, the anti-submarine radar shall have the various working modes specified in this article. 3.4.1.1 Air-to-sea search mode (see Article 4.7.3.1.1) The anti-submarine radar shall be able to search and discover submarines and surface targets sailing in the snorkel state within the range of 0℃~360℃ in a sea state not higher than level 5. Provide search information for ship-borne anti-submarine helicopters. 3.4.1.2 Auxiliary navigation mode (see Article 4.7.2.1.2) The anti-submarine radar is connected with the airborne electronic equipment and should be able to achieve the following modes: a. True motion stability: Press the "true motion" button, the radar forms a map with ground coordinates, the map is fixed on the display, and the carrier and active targets are moving;
b. Map freeze (map memory): The radar stops transmitting, but the system can support the radar map on the multi-function display without disappearing, and the carrier is moving in the map. 3.4.1.3 Scan and track mode (now Article 4.7.3.1.3) Unless otherwise specified, when the anti-submarine radar works in this mode, it should be able to track multiple targets while performing circular scanning to search for targets. And it can transmit the data such as the direction, distance and batch number of these targets to the airborne integrated processing system and data link. 3.4.1.4 Passive monitoring mode (see Article 4.7.3.1.4) When the anti-submarine radar works in this mode, only the receiving branch works. Receive electromagnetic radiation signals of designated frequency and display the direction and approximate distance of the radiation source (based on signal strength). 3.4.1.5 Beacon mode (see 4.7.3.1.5) The anti-submarine radar should be able to work in conjunction with the transponder on the carrier or friendly aircraft, transmit the interrogation signal that the transponder can receive, receive the coded reply signal of the transponder, complete the decoding process, and display the beacon mark. 3.4.1.6 Weather detection mode (see 4.7.3.1.6) The anti-submarine radar should be able to detect and display weather conditions such as clouds and rain ahead of the flight, and reveal that the carrier aircraft has bypassed the thunderstorm area. 3.4.1.7 Built-in Test (BIT) (see 4.7.3.1.2) 2
SJ 20656—1998
Anti-submarine radars should have the following types of test methods: a. Power-on self-test: Each time the power is on, the radar automatically self-tests, reports the self-test results to the integrated processing system and displays them; b. Periodic self-test: Each unit of the radar performs periodic tests during working intervals. The test results are sent to the integrated processing system and can be displayed when necessary;
c. Manual start test: The test device is manually started during radar operation, the radar is tested for the entire system, and the test results are displayed.
3.4.2 Working frequency (see 4.7.3.2) The working frequency is specified by the product specification.
3.4.3 Detection distance
3.4.3.1 Primary radar detection distance (see 4.7.3.3) Primary radar detection distance is specified by the product specification. 3.4.3.2 Secondary radar detection range (see Article 4.7.3.3) Unless otherwise specified, the secondary radar detection range should not be less than 120kmc. 3.4.3.3 Detection range for heavy rain (see Article 4.7.3.3) Unless otherwise specified, the detection range of anti-submarine radar for heavy thunderstorms should not be less than 185km. 3.4.4 Detection azimuth (see Article 4.7.3.4) Unless otherwise specified, the detection azimuth of the anti-submarine radar should be 0%℃~360℃ (except for the aircraft installation shielding restrictions): 3.4.5 Test accuracy
3.4.5.1 Range accuracy (see Article 4.7.3.5) Unless otherwise specified, the maximum range measurement error of the anti-submarine radar should not exceed 250ms3.4.5.2 Azimuth accuracy (see Article 4.7.3.5) Unless otherwise specified, the maximum azimuth measurement error of the anti-submarine radar should not exceed 0.75\3.4.6 Resolution
3.4.6.1 Range resolution (see Article 4.7.3.6.1) Unless otherwise specified, the range resolution of the anti-submarine radar should not exceed 35m. 3.4.6.2 Azimuth resolution (see Article 4.7.3.6.2) Unless otherwise specified, the azimuth resolution of the anti-submarine radar should not exceed 3.5°. 3.4.7 Anti-interference performance (see Article 4.7.3.7) The anti-submarine radar should have the following anti-interference capabilities, and the specific requirements are specified by the product specifications. a. Anti-narrowband aiming noise interference;
b. Anti-co-frequency asynchronous pulse interference;
c.Anti-distance deception interference;
d. Anti-angle deception interference;
e. Anti-sea wave clutter interference.
3.4.8 Display (now Article 4.7.3.8) Unless otherwise specified, the display equipment of the anti-submarine radar is the multi-function display in the airborne integrated processing system. In order to facilitate radar debugging, a high-brightness light cabinet display should be optional. 3.4.9 Connection door (see Article 4.7.3.9)
Unless otherwise specified, the anti-submarine radar should have the following interfaces: 3
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SJ 20656—1998
a: ARICA29 or SE-STD-1553B data bus interface; b. RS-422 interface;
C. ARICA07 data bus interface.
3.4.10 Reaction time
3.4.10.1 Warm-up time (see Article 4.7.3.10.1) Unless otherwise specified, the warm-up time of the anti-submarine radar shall not exceed 3 minutes. 3.4.10.2 Working mode conversion time (see Article 4.7.3.10.2) Unless otherwise specified, the working mode conversion time of the anti-submarine radar shall not exceed 18. 3.4.10.3 TWS response time (see Article 4.7.3.10.3) Unless otherwise specified, the TWS response time of the anti-submarine radar shall not exceed 15 seconds. 3.4.1t Continuous working time (see Article 4.7.3.11) Unless otherwise specified, the continuous working time of the anti-submarine radar shall not be less than 4 hours. 3.4.12 Power adaptability and power consumption (see Article 4.7.3.2) a. The power adaptability of the anti-submarine radar shall comply with the provisions of Article 2.4 of CJB181 (power supply category B); b. The power consumption of the anti-submarine radar shall be specified by the product specifications. 3.4.13 Antenna
3.4.13.1 Appearance size (see Article 4.7.3.13.1) The appearance size of the anti-submarine radar antenna shall meet the adaptability requirements of the carrier aircraft. 3.4.13.2 Polarization form (see Article 4.7.3.13.2) Unless otherwise specified, the antenna polarization form shall be horizontal polarization. 3.4.13.3 Scanning range (see Article 4.7.3.13.3) Unless otherwise specified, the scanning range of the antenna shall meet the following requirements: Azimuth: 360#;
Pitch: ±15° (manual).
3.4.13.4 Scanning mode and speed (see 4.7.3.13.4) Unless otherwise specified, the antenna scanning mode and scanning speed shall comply with the provisions of Table 1. Table 1 Antenna scanning mode and speed
Scanning mode
Circular scan: 360° scan
Scan: ± 30°, ± 60%, ± 90°3.4.13.5 Horizontal beam width (see 4.7.3.13.5) Scanning speed
(12±0.5) r/min, (24±0.35) r/mim(144± 7.2)0/s
Unless otherwise specified, the antenna horizontal beam width shall not exceed 3.5°3.4.13.6 Vertical beam width (see 4.7.3.13.5) The antenna vertical beam width shall be specified by the product specifications. 3.4.13.7 Sidelobe level (see Article 4.7.3.13.5) Unless otherwise specified, the antenna sidelobe level should not be greater than -22dB. 3.1.13.8 Gain (see Article 4.7.3.13.5) Unless otherwise specified, the antenna gain should not be less than 30dB4
3.4.14 Feeder
SI 206561998
3.4.14.1 Voltage standing wave ratio (see Article 4.7.3.14) Unless otherwise specified, the feeder voltage standing wave ratio should not be greater than 1.4. 3.4.14.2 Total loss of receiving branch (see Article 4.7.3.14) Unless otherwise specified, the total loss of receiving branch should not be greater than 2.8dB. 3.4.14.3 Total loss of the transmitting branch (see Article 4.7.3.14) Unless otherwise specified, the total loss of the transmitting branch shall not exceed 1.7dB. 3.4.15 Peak power of the transmitting unit output (see Article 4.7.3.15) The peak power of the transmitting unit output shall be specified by the product specification. 3.4.16 Receiving unit
3.4.16.1 Noise factor (see Article 4.7.3.16.1) Unless otherwise specified, the noise factor of the receiving unit shall not exceed 5dB. 3.4.16.2 Frequency source output frequency (see Article 4.7.3.16.2) The frequency source output frequency shall be specified by the product specification. 3.4.16.3 Frequency source output power (see Article 4.7.3.16.3) Unless otherwise specified, the frequency source output power shall not be less than 50mW3.4.16.4 Image frequency suppression (see Article 4.7.3.16.4) Unless otherwise specified, the image frequency suppression within the working frequency band of the friendly submarine radar shall not be less than 20dB,3.4.17 Timing signal (see Article 4.7.3.17) The timing signal of the anti-submarine radar shall be specified by the product specification,3.5 Safety
Anti-submarine radar shall be designed for safety in accordance with Articles 6.6 and 6.7 of CB457, and the specific safety indicators shall be specified by the product specification.
3.6 Environmental requirements
3.6.1 Low temperature storage
Unless otherwise specified, after the anti-submarine radar is subjected to the low temperature storage test specified in Article 4.7.5.1 at -55℃, there shall be no damage or performance degradation. 3.6.2 Low temperature operation
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation when the low temperature operation test is carried out at -40℃ in accordance with the provisions of Article 4.7.5.2. 3.6.3 High temperature storage
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation after the high temperature storage test is carried out at 70℃ in accordance with the provisions of Article 4.7.5.3.
3.6.4 High temperature operation
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation when the high temperature operation test is carried out at 55℃ in accordance with the provisions of Article 4.7.5.4.
3.6.5 Temperature shock
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation when the temperature shock test is carried out at a high temperature of 70℃ and a low temperature of -55℃ in accordance with the provisions of Article 4.7.5.5. s
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3.6.6 Acceleration
3.6.6.1 Performance test
SJ 206561998
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation when the acceleration test is carried out according to the acceleration values in Table 2 and in accordance with the provisions of Article 4.7.5.6. Table 2 Acceleration - Performance test
Acceleration
3.6.6.2 Structural test
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation after the acceleration test is carried out according to the acceleration values in Table 3 and in accordance with the provisions of Article 4.7.5.6. Table 3 Acceleration - Structural Test
Acceleration
3.6.7 Shock
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation after the shock test according to the conditions in Table 4 and the provisions of Article 4.7.5.7.
Table 4 Shock - Basic Design Test
Half Sine Wave
3.6.8 Vibration
Peak Acceleration m/g
Duration m/g
Test Direction
Axial Direction
Number of Tests in Each Direction
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation during the functional test and after the structural test according to the conditions given in Article 2.3.6 of GJB150.16 and the provisions of Article 4.7.5.8. 3.6.9 Damp Heat
Unless otherwise specified, the anti-submarine radar shall not have any physical damage or performance degradation when the damp heat test is carried out according to the conditions in Table 5 and in accordance with the provisions of Article 4.7.5.9.
Table 5 Damp Heat Test Conditions
High Temperature and Commercial Humidity Stage
60°C
3.6.10 Mold
Relative Condensation
Low Temperature and High Humidity Stage
Relative Humidity
The anti-submarine radar shall use anti-mold materials to ensure that the radar has no physical damage or performance degradation during the mold season. 3.6.11 Salt Spray
Test Cycle
The anti-submarine radar shall use materials resistant to salt spray corrosion to ensure that the radar has no physical damage or performance degradation during its service life. 3.7 Electromagnetic Compatibility
Unless otherwise specified, the electromagnetic compatibility of the anti-submarine radar shall comply with the provisions of this Article. 3.7.1 CE030.015-50MIHz Conducted emission of power lines and interconnection lines SJ 20656-1998
CE03 limit of anti-submarine radar shall comply with the provisions of GJB151.2 Article 3,2. 3.7.2CE07 The CE07 limit of the conducted emission of the power line spike signal of the anti-submarine radar shall comply with the provisions of Article 5.2 of GJB151.2 3.7.3CS01 The CS01 limit of the conducted sensitivity of the 25Hz~50kHz power line of the anti-submarine radar shall comply with the provisions of Article 6.2 of GJB151.2 3.7.4CS02 The CS02 limit of the conducted sensitivity of the 0.05~400MHz power line of the anti-submarine radar shall comply with the provisions of Article 7.2 of GJB151.2. 3.7.5 CS06 Power line spike signal conduction sensitivity The CS06 limit of anti-submarine radar shall comply with Article 11.2 of GJB151.2 3.7.6 RE01 25Hz~50kHz magnetic field radiation emission The RE0I limit of anti-submarine radar shall comply with Article 14.2 of GJR151,2 3.7.7 RE02 14kHz~10GHz electric field radiation emission The RE02 limit of anti-submarine radar shall comply with Article 15.2 of GJB15!.2 3.7.8 RE03 Harmonic and spurious radiation emission
The RE03 limit of anti-submarine radar shall comply with Article 16.2 of GJB151.2. 3.7.9RS0125Hz~50kHz magnetic field radiation sensitivity RS01 limit value of anti-submarine radar shall comply with Article 17.2 of GJB151.2. 3.7.10RS02 spike signal and power frequency magnetic field radiation sensitivity RSU2 limit value of anti-submarine radar shall comply with Article 18.2 of GJB151.2. 3.7.11RS0314kHz~40GHz electric field radiation sensitivity RSU3 limit value of anti-submarine radar shall comply with Article 19.2 of CJB151.2. 3.8 Dimensions
The dimensions of anti-submarine radar shall meet the adaptability requirements of the carrier aircraft. Unless otherwise specified, the dimensions of the anti-submarine radar chassis and mounting frame shall comply with the provisions of CJB441:
3.9 Weight
The weight of the anti-submarine radar shall meet the adaptability requirements of the carrier aircraft, and the specific value shall be specified by the product specification. 3.10 Color
Unless otherwise specified, the surface of the anti-submarine radar antenna and feeder unit should be white, and the outer surface of other units should be black: 3.11 Surface condition
The outer surface of each unit of the anti-submarine radar should be free of burrs, cracks, deformation and obvious scratches, and the surface coating should be evenly distributed without blistering, cracking and falling off.
3.12 Product marking
At least the following markings should be on each unit of the anti-submarine radar: a. Product model and unit number:
b. Weight:
C. Manufacturing date or production batch number
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4 Quality assurance regulations
4.1 Inspection responsibilities
SI 20656-1998
Unless otherwise specified in the contract or order, the contractor shall be responsible for completing all inspections specified in this specification. When necessary, the ordering party or the superior appraisal agency has the right to inspect any of the inspection items described in the specification. 4.1.1 Responsibility for Conformity
All products must meet all the requirements of Chapter 3 and Chapter 5 of the specification. The inspections specified in this specification shall become an integral part of the contractor's entire inspection system or quality program. If the contract includes inspection requirements not specified in this specification, the contractor shall also ensure that the products submitted for acceptance meet the contract requirements. Quality consistency sampling does not allow the submission of products that are known to be defective, nor can the ordering party be required to accept defective products. 4.2 Inspection Classification
The inspections specified in this specification are divided into!
a. Appraisal inspection;
b. Quality-conformity inspection.
4.3 Inspection Conditions
Unless otherwise specified, various inspections shall be carried out under the "standard atmospheric conditions for testing" specified in Article 3.1.1 of GJB150.1.
4.4 Identification inspection
4.4.1 Inspection items and sequence
The identification inspection items shall be in accordance with the provisions of Table 6, and the inspection sequence shall be in accordance with the product specifications. 4.4.2 Sample size
The sample size to be inspected for identification shall be one anti-submarine radar. 4.4.3 Qualification criteria
Each inspection item shall be judged as qualified if it meets the requirements. Table 6 Identification inspection and quality consistency inspection item sequence
Inspection items
Feasibility
Maintainability
Air-to-sea exploration mode
Auxiliary navigation mode
: TWS mode
Passive monitoring mode
Beacon mode
Meteorological detection mode
Required
Chapter number
Inspection or test method
Article number of the law
4.7.3.1.1
4.7.3.1.2
4.7.3.1.3
4.7.3.1.4
4.7.3.1.5
4.7.3.1.6
Quality consistency inspection
Inspection items
In-machine inspection
Working frequency
~ radar detection distance| |tt||Secondary radar detection distance
Detection azimuth
Distance accuracy
Azimuth accuracy
Distance resolution
Azimuth resolution
Anti-narrowband aiming interference
Anti-co-frequency asynchronous pulse interference
Anti-distance deception interference
Anti-angle deception interference
Anti-sea wave clutter interference
Display
Warm-up timewwW.bzxz.Net
Working mode conversion time
TWS response time
Continuous working time
Power supply adaptability and power consumption
Antenna dimensions
Polarization form
Antenna scanning range
Antenna scanning mode and speed
Horizontal beam width
Vertical beam width
Sub-level
Antenna gain
SI 206561998
Required
Article number
Inspection or test method
Article number
4.7.3.1.7
4.7.3.6.1
4.7.3.6.2
4.7.3.7.1
4.7.3.7.2
4.7.3.7.3||tt ||4.7.3.7.4
4.7.3.7.5
4.7.3.10.1
4.7.3.10.2
4.7.3.10 .3
4.7.3.12a
4.7.3.12b
4.7.3.13.1
4.7.3.13.2
4.7 .3.13.3
4.7.3.13,4
4.7.3.13.5
Quality consistency inspection
Quality group, Group B
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Inspection items
Feeder voltage standing wave ratio
Total bundle loss of receiving branch
Total loss of transmitting branch
Peak power extracted by transmitting unit|| tt||Noise figure
Frequency source output frequency
Frequency source output power
Image frequency suppression
Timing signal
Safety
Low temperature storage
Low temperature operation
High temperature storage
High temperature operation
Temperature shock
Acceleration
68RS02
SI 206561998
Required
Chapter number
Inspection or test method
Chapter number
4.7.3.16.1
4.7.3.16.2
4.7.3.16.2
4.7.3.16.3
Quality consistency inspection
" Dimension
Inspection items
Surface condition
Product mark
Note: The symbol "0" indicates a mandatory item.
SI 20656--1998
Required
Chapter number
Inspection or test method
Chapter number
Quality consistency inspection
If a certain inspection item is found to be non-compliant, the inspection shall be stopped. The contractor shall analyze the non-compliant item, find out the cause, take corrective measures and prove that the measures are effective and reliable, and then re-inspect the item. 4.4.4 Maintaining the qualification of appraisal
In order to maintain the qualification of appraisal, the contractor shall provide test data to the appraisal institution on a regular basis. 4.5 Quality consistency inspection
4.5.1 Defect classification
Defects are divided into fatal defects, serious defects and minor defects. The definition of each type of defect can be found in Article 1.10 of GJB179: 4.5.2 Inspection batch
An inspection batch shall consist of all products of the same model produced under basically the same conditions and submitted for inspection at the same time. 4.5.3 Group A inspection
4.5.3.1 Inspection items and sequence
Group A inspection items shall be specified in Table 6, and the inspection sequence shall be specified by the product specification. 4.5.3.2 Inspection method
Submit one by one and judge by one.
4.5.3.3 Determination of non-conformity.
If any of the following situations is found, the product shall be judged as non-conformity: a. Fatal defects are found;
b. Serious defects are found:
c. The number of minor defects is greater than the value specified in the contract or product specification. 4.5.3.4 Handling of non-conforming products.
If the product is judged as unqualified, the contractor can repair it to correct its defects and resubmit it for re-inspection. 4.5.4 Group B inspection
4.5.4.1 Inspection items and sequence
Group B inspection items are specified in Table 6, and the inspection sequence is specified by the product specification. 4.5.4.2 Sampling
Randomly select from the 4 groups of qualified products. When the batch is not less than 5 parts, select 2 times each time. When the batch is less than 5 parts, select 1 product for Group B inspection. 4.5.4.3 Unqualified judgment
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