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 Wysłany: Nie 2:07, 12 Gru 2010 Temat postu: ugg boots billig Sliding filtering technique based |
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Sliding filtering technique based on evaluation of laser gyro
Angle random walk coefficient correct to achieve an accurate evaluation of the laser gyro. If you increase the value of M, of course much more to reduce the impact of quantization noise, but Figure 1 shows the amplitude frequency response reduces the bandwidth of main lobe, it is possible to make useful signal when the filter has also been lost. Another output of the filter time increases by a greater delay. 3 Experimental Analysis of Figure 2 is a type of laser gyro at a sampling frequency of 125Hz when the drift of the filter and after sliding 100 points and 100 points after two series ink 200 ? 0I 』§ 20010864200250300350400ttme/ms (a) 200250300350400ttme/ms ( b) 05 () 100l50200250300tlme/ms (c) (a) the drift of the laser gyro; (b) filtered signal by sliding (e) moving through the series filtered signal. Figure 2 Joint sliding filter the signal after the comparison, their average values are 6.3823 (\) / s,[link widoczny dla zalogowanych], 0.8457 () s and 0.3497 () / s. From the experimental results can be seen moving through the filter in series after the laser gyro quantization noise has been effectively suppressed by the laser gyro noise variance error mainly caused by the angle random walk,[link widoczny dla zalogowanych], from (7) can estimate the laser Ar gyro random walk coefficient is 0.0064 (.) v / h. 4 Conclusion In this paper, the basic principle of series sliding filters, quantization noise of the laser gyro angle random walk and slide the filter in series after the sound of the statistical characteristics of the laser through a type of gyroscope drift sliding filtering data , quantization noise is effectively suppressed,[link widoczny dla zalogowanych], the actual noise reduction effect is consistent with the theoretical analysis, and estimate the angle random walk coefficient, which proves the series moving average filtering technique can effectively reduce the quantization noise of the laser gyro and to achieve laser accurate assessment of gyroscope. References [1] Oppenheim, Schafer RW. LIU Shu-tang, Huang Jianguo, translated. Discrete-time signal processing [M]. Xi'an: Xi'an Jiaotong University Press, 2003. r2] s Acoustic, Wang. Random signal analysis based rM1. Beijing: Electronic Engineering, I Press,[link widoczny dla zalogowanych], [3] GyroandAccelerometerPaneloftheIEEEAerospaceandElectronicSystemsSociety. IEEEStandardSpecificationFormatGuideandTestProcedureforSingle-AxisLaserGyros [S]. 1995. [4] TehraniMM. Ringlasergyrodataanalysiswithclustersamplingtechnique. ProceedingsoftheSHE [J]. 1983,412:2 O7 ~ 222. The rapid development of test and measurement market demand for advanced equipment as the main driver of the global test and measurement market in the development of a range of technologies and features have made the end-user performance on the test device with additional growth in demand. However, cost-conscious end users do not want to pay for the additional features more money. This allows manufacturers face severe pricing pressure, they must supply a competitive price test and measurement products. The latest market research FrostSullivan WorldGeneralPurposeTestMeasurementEquipmentMarket-ACompendium analysis showed that the total market revenue in 2004 was 38.4 billion U.S. dollars,[link widoczny dla zalogowanych], is expected to reach 2011, $ 5,407,000,000. The main factors driving the market development is the end-user requirements to accelerate the testing process, which stimulate the market demand for advanced test equipment. These advanced devices (such as spectrum analyzer) can process signals faster, improve the rate of manufacturing output. In addition, wireless and other electronic industry in speed, accuracy, functionality and performance through a series of other technological advances, consumer demand for high-end products surge. The growth of the test and measurement company to promote research and development activities, especially the oscilloscope, spectrum analyzer and signal generator, such as product development. (From \
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