1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards VEHICLE ELECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE Do Not Use on New Programs. Being Replaced by GMW3091 EDS-T-5513 ISSUED DATE: 1994. 05. 03 REVISED DATE: 2008. 11. 04 VERSION: 5 (Superceded) EDS-T-5513VEHICLE E
2、LECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE PAGE: 1/11 ISSUED DATE: 1994. 05. 03 REVISED DATE: 2008. 11. 04 VERSION: 5 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project (incl. Variant Program). It is Superceded for all future projects and replaced by GMW3091.
3、 1. PURPOSE This standard aims at evaluating electromagnetic immunity of vehicles manufactured by GMDAT and determining the corresponding frequency and level in case of a certain deviation. 2. SCOPE This standard applies to all vehicles manufactured by GMDAT. 3. DEFINITION OF TERMS 3.1. Electromagne
4、tic compatibility : EMC Capability of electric/electronic parts or systems to operate to the design performance level under electromagnetic environment 3.2. Amplitude modulation : AM A series of carrying signals of carrier amplitude 3.3. Electromagnetic immunity Capability to operate normally under
5、electromagnetic environment without performance drop 3.4. Forward power Power from the power amplifier output terminal which goes toward the load 3.5. Reflected power Power from power amplifier output terminal which is reflected toward the load as a result of impedance mismatching between the transm
6、ission line and load 3.6. Net power “Forward power-reflected power“ at the same point of the same transmission line 4. TEST EQUIPMENT 4.1. Field-generating device It uses the antenna TLS (Transmission Line System). The construction and direction of the field generating device shall be such that fiel
7、d polarization is generated as specified in test matrix. 4.2. DUT monitoring It is conducted using equipment required to monitor normal operation of DUT by connecting it to the test EDS-T-5513VEHICLE ELECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE PAGE: 2/11 ISSUED DATE: 1994. 05. 03 REVISED DATE: 2
8、008. 11. 04 VERSION: 5 GM DAEWOO Auto & Technology equipment controller with a fiber-optic link or high-resistance cable. 4.3. Field probe An isotropic field probe is used. For transmission line from the probe, a fiber-optic link or high-resistance cable is appropriate. 5. TEST PLAN Before proceedin
9、g with each test, a test matrix shall be generated. Items in test matrix : vehicle type, test conditions, applicable items, application level, notes on test 6. TEST SETUP 6.1. Type of field generating device 6.1.1. Select a proper device that will create a desired field at the reference point. 6.1.2
10、. Use an antenna or TLS(transmission line system). 6.2. Measurement height and distance 6.2.1. Measuring height (from antenna center to test place floor) (1) Vehicle roof height 3m or less : min. 1.5m from antenna (2) Vehicle roof height 3m or more : min. 2.0m from antenna (3) Antenna radiation part
11、 shall be min. 0.25m away from the point where the vehicle is placed. 6.2.2. Measuring distance (1) Generally 1m - 5m. (2) Distance between radiation antenna and electromagnetic wave absorbing body : min. 1.0m (3) Distance between radiation antenna and shield room wall : min. 1.5m (4) No absorbing b
12、ody shall be present between the radiation antenna and test vehicle. 6.3. Position of vehicle and antenna 6.3.1. Distance between each portion of the antenna and the outermost part of the vehicle : min. 0.5m 6.3.2. The field generating device shall be placed on the vehicle center line. (vertical mat
13、ching plane) 6.3.3. Distance between TLS and vehicle : min. 0.5m 6.3.4. The field generating device placed on the vehicle shall be expanded to min. 75% of the vehicle length. 6.4. Vehicle condition during test 6.4.1. Remove all luggages except for the necessary test equipment out of the vehicle insi
14、de. 6.4.2. Unless there exist any technical factors to prefer other speeds, set the vehicle speed to steady speed of EDS-T-5513VEHICLE ELECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE PAGE: 3/11 ISSUED DATE: 1994. 05. 03 REVISED DATE: 2008. 11. 04 VERSION: 5 GM DAEWOO Auto & Technology 50km/h. Drivin
15、g wheels shall rotate all the while through test. For this, use a chassis dynamometer. When it is not available, the vehicle shall be supported on the insulated axle stand. For trucks, the transmission shaft may be separated for test. 6.4.3. Set head lamps to “near“ position. 6.4.4. Operate the turn
16、 indication lamp (right or left). 6.4.5. Operate all electric/electronic parts that can affect safe driving.(To be specified on test matrix.) 6.4.6. The vehicle must be electrically isolated from the test site. Regard the heels touching the test place floor as not being electrically connected. 6.4.7
17、. If electric/electronic devices that may directly affect car driving cannot be activated according to specification described in “6.4.1” and “6.4.5”, perform a test on the devices following EDS-T-5512 How to Test Electromagnetic Immunity on Electrical Equipment and Devices. 6.4.8. To observe a test
18、 car, use equipment such as a set of video camera that does not affect the test activities. For the observation, pick up the areas of and the exterior and passenger seat. Then, check if those areas match up to the test standard. 6.4.9. Set the car and the test antenna facing each other. If electroni
19、c control unit and its wiring are set up in the rear part, the test can be performed in the rear. If in the middle area in a long car, set the reference point on the right or left of the car. In this case, sedan, and van are excluded from the long car category. Write down data on the antenna positio
20、n in the test report. 7. TEST REQUIREMENTS 7.1. Frequency band and antenna polarization 7.1.1. Development test (1) Frequency band : 100khz - 1GHz (Full Scan) (2) Antenna polarization : horizontal polarization and vertical polarization 7.1.2. Certification test (1) Frequency band : 14 spot frequenci
21、es in 20MHz - 1GHz band (2) (Ex)27M, 45M, 65M, 90M, 120M, 150M, 190M, 230M, 280M, 380M, 450M, 600M, 750M, 900Mhz (3) Antenna polarization : horizontal polarization or vertical polarization 7.2. Modulation 7.2.1. Development test (1) No modulation (CW) (2) 1KHz sinusoidal amplitude modulation (AM) 80
22、% EDS-T-5513VEHICLE ELECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE PAGE: 4/11 ISSUED DATE: 1994. 05. 03 REVISED DATE: 2008. 11. 04 VERSION: 5 GM DAEWOO Auto & Technology 7.2.2. Certification test 1KHz sinusoidal amplitude modulation (AM) 80% 7.3. Electromagnetic wave dwell time : min. 2 seconds 7.4
23、. Frequency step Table 1. Frequency step FREQUENCY BAND MAXIMUM FREQUENCY STEP SIZE 100KHz-1MHz 100KHz 1MHz-10MHz 1MHz 10MHz-200MHz 2MHz 200MHz-1GHz 20MHz A log step may be used instead of a linear step. In this case, however, the minimum frequency step, which is the same as in the linear step, shal
24、l be used for each frequency band. Note)When the threshold immunity value stays around the selected electromagnetic application level during test, conduct test for each frequency band by shortening the frequency step in Table 1 to find out the minimum threshold immunity. 8. TEST PROCEDURES 8.1. Fiel
25、d application : Use substitution method. Using the substitution method, determine the specific test level (E-field, current, voltage, power) before test. Then, use the level calibrated by the substitution method for the test level applied to the vehicle. 8.1.1. At a time of applied level measurement
26、 with the substitution method, coupling and reflection energy between the antenna and the object to be tested become main factors. During test, the net power shall be kept to the calibration point within 2dB although the forward power increases. Note 1)When the forward power exceeds 2dB, enter this
27、on test report. Note 2)If SWR (standing wave ratio) of the test equipment is within 1.2 : 1, set the reference parameter to test the forward power. 8.1.2. Place the field generating device (antenna) according to clause 6, and place the calibrated isotropic field probe to the reference point. 8.1.3.
28、Instead of an isotropic field probe, an antenna may be used. In this case, the read field level is based on the orthogonal direction and determined isotropic equivalent field. 8.1.4. Without the vehicle in present, use the field probe or antenna to measure field, and record net power that can mainta
29、in the field level according to the given field level and antenna polarization. 8.1.5. Upon completing field level calibration, move the vehicle to the test place. Apply the calibrated net power to the vehicle according to each frequency and antenna polarization specified on the test matrix. EDS-T-5
30、513VEHICLE ELECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE PAGE: 5/11 ISSUED DATE: 1994. 05. 03 REVISED DATE: 2008. 11. 04 VERSION: 5 GM DAEWOO Auto & Technology 8.2. Reference point for substitution method The reference point is a point based on which the field intensity is measured and calibrated
31、in test. 8.2.1. Vehicle reference point : reference point for substitution method (1) It means the point at which the field is defined and created as follows: (2) A point horizontally at least 2m from the antenna surface center, or a point vertically at least 1m from TLS radiation part. (3) Above ve
32、hicle center line (vertical planes of symmetry) (4) Reference point height 1) Vehicle roof height 3m or less : 1.00.05m above surface on which vehicle is placed 2) Vehicle roof height 3m or more : 2.00.05m above surface on which vehicle is placed (5) A point 0.20.2m behind the vehicle foremost axle
33、center line, or a point 10.2m) behind the intersecting point between the vehicle windscreen and hood. Among the above, select the one nearer from the antenna as the vehicle reference point. (Fig 3 and 4) 8.3. When test is conducted with the antenna placed behind the vehicle Determine the vehicle ref
34、erence point as in clause 8.2.1. and conduct test by rotating the vehicle 180 horizontally around the point. In other words, determine the point so that distance between the antenna and the portion nearest from the vehicle outer body is the same as in the vehicle front test. 8.4. After moving the ve
35、hicle to the test place, conduct set-up as in clause 6, and conduct test according to 8.1. 8.5. As specified in the test matrix, scan the electromagnetic wave along each frequency band to horizontal polarization / vertical polarization, and monitor presence of erroneous functions of the vehicle. 8.6
36、. After completing test for all modulation, polarization, frequency band, vehicle direction, antenna positioning mode as specified in the test matrix, detect the threshold immunity field level and threshold creating center frequency. For detection of threshold immunity field level in each threshold
37、creating frequency band, gradually increase the field generating device power level to observe reaction of the vehicle, and then with the power level fixed, change frequency. 9. TEST RESULT EVALUATION STANDARD 9.1. Functional status classification 9.1.1. CLASS A : CONVENIENCE FUNCTION 9.1.2. CLASS B
38、 : CRITICAL FUNCTION 9.1.3. CLASS C : SAFETY-CRITICAL FUNCTION Functional status classification examples EDS-T-5513VEHICLE ELECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE PAGE: 6/11 ISSUED DATE: 1994. 05. 03 REVISED DATE: 2008. 11. 04 VERSION: 5 GM DAEWOO Auto & Technology Table 2. Functional/parts
39、status classification CLASS A CLASS B CLASS C Cellular phone operation Convenience information display (i.e., Navigation, Clock, Trip Odo/ Computer) Delayed Accessory Bus Operation Entertainment System Operation Express Window Down Operation Headlamp/Key Warning Operation Interior Lighting Operation
40、 Low Tire Pressure Warning Auto Level Control Climate Control/Display Operation Cluster Display/Gauge Operation Door Lock/Trunk Release Operation Heated Windshield Operation Horn Operation Mirror Operation Telltale Display Operation Rear Defogger Operation Keyless Entry Operation Anti-Theft System O
41、peration Suspension Control Brake/Traction Control Cruise Control Electric Convertible Top Operation Engine Control Exterior Lighting Operation Speedometer/Odometer Operation Power/Heated/Memory Seat Operation Power Sliding Door Operation Power Sunroof Operation Power Window Operation PRNDL Operatio
42、n Restraint Operation(i.e., Warning, ADL) Serial Data Operation Steering Control Throttle Control Transmission/Transfer Case Control Windshield Wipers/Washers/Defrost Operation 9.2. Region of performance 9.2.1. REGION I : No erroneous functions during/after electric field application 9.2.2. REGION I
43、I : Erroneous functions during electric field application but restored to the initial state after application 9.2.3. REGION III : Erroneous functions during/after electrostatic application but restored to the initial state after application by action of the test engineer (reset, etc.) 9.2.4. REGION
44、IV : Erroneous functions during/after electric field application and cannot be repaired. If electrical devices mounted on a car malfunctions per region, the tester and designer parties can discuss the matter with each other and adjust it. For example, they can set a standard based on a display disto
45、rtion or a sound mixed with noise, as to whether the AV system malfunctions. 9.3. Criteria for Test Result 9.3.1. While in the process of development test, perform a sweeping test at a field intensity of 100V/m per step. If there is anything found defective, lower the intensity and find a the minimu
46、m threshold immunity. If the minimum threshold immunity is above the level matching the class of the electrical devices, treat it as rejected. 9.3.2. Fix a standard for the case that each class satisfies REGION (there must be no malfunction during/after the application of electromagnetic wave). Each
47、 the minimum threshold immunity per class is as follows:- EDS-T-5513VEHICLE ELECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE PAGE: 7/11 ISSUED DATE: 1994. 05. 03 REVISED DATE: 2008. 11. 04 VERSION: 5 GM DAEWOO Auto & Technology (1) CLASS A : CONVENIENCE FUNCTION : 35V/m (2) CLASS B : CRITICAL FUNCTIO
48、N : 55V/m (3) CLASS C : SAFETY-CRITICAL FUNCTION : 75V/m 9.3.3. The tester and designer parties can discuss with each other a matter of setting up criteria different from REGION . In this case, the whole criteria per class are as shown in Table 3 below. Table 3. Criteria for Test Result per Class 10
49、0V/m CLASS A CLASS B CLASS C 75V/m REGION REGION 55V/m REGION 35V/m REGION REGION 10. RELATED STANDARDS 10.1. SAE J551/11 ISSUED Mar. 94 : VEHICLE ELECTROMAGNETIC IMMUNITY -OFF-VEHICLE SOURCE 10.2. EC95/54 ANNEX VI : METHOD OF TESTING FOR IMMUNITY OF VEHICLES TO ELECTRO- MAGNETIC RADIATION EDS-T-5513VEHICLE ELECTROMAGNETIC IMMUNITY - OFF - VEHICLE SOURCE PAGE: 8/11 ISSUED DATE: 1994. 05. 03 REVISED DATE: 20
