Sonde wind speed measurement error compensation method based on inertial system
A wind speed measurement and inertial system technology, applied in the field of meteorological detection, can solve the problems of wind measurement data overcompensation, undercompensation, and inability to perform wind speed compensation, and achieve the effect of avoiding overcompensation and undercompensation
Active Publication Date: 2022-06-28
BEIHANG UNIV
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Problems solved by technology
In the radiosonde system, there are mainly two components, the parachute and the radiosonde. The significance of wind speed compensation is mainly to compensate the complex movement of the radiosonde itself around the parachute. If the acceleration information obtained by the inertial module is simply used to Calculating the wind speed is equivalent to measuring the instantaneous wind speed of the entire sounding system, which has the same effect as GPS measurement, and does not solve the measurement error caused by the movement of the radiosonde around the umbrella, and cannot achieve the effect of wind speed compensation
For the second point, in order to solve the error, the attitude information measured in the inertial system must be used, but this method is only to solve the swing period of the radiosonde, which has the same problem as the research article mentioned before, that is, using the solution Compensating the wind measurement data at all times with a calculated cycle will cause over-compensation or under-compensation. It is not necessary to compensate for the impact of the consistent swing cycle at every moment. Each moment has its own unique characteristics, which should be determined according to the actual situation. Compensating the error of wind speed measured by radiosonde one by one
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Embodiment 1
[0158] like Figure 6-7 As shown, the self-developed radiosonde equipped with an inertial navigation system was used to conduct a 20km drop-down experiment in Xinjiang to detect three-dimensional space meteorological data. The measured trajectory of the sonde relative to the parachute is as follows: Figure 5 As shown in the figure, the drift of the wind speed measurement caused by the random swing of the radiosonde is obtained by the solution, and the eastward speed and the northward speed obtained by GPS calculation are respectively compensated. Compensation effect such as Figure 8 where (a) is the compensation result of the sonde's eastward wind speed, the dotted line is the eastward wind speed calculated by GPS, the solid line is the eastward wind speed after compensation based on the inertial system, and (b) is the northward direction of the sonde The wind speed compensation results, the dotted line is the north wind speed calculated by GPS, and the solid line is the n...
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The invention discloses a sonde wind speed measurement error compensation method based on an inertial system, and the method comprises the steps: integrating an inertial assembly on a conventional sonde system, obtaining the real attitude information of the movement of a sonde, and compensating the wind speed measurement error caused by the self-movement of the sonde in a severe environment. Error compensation is carried out by utilizing actual measurement data of an inertial system, point-by-point high-precision compensation can be carried out according to the actual condition of each test of the sonde, and the wind speed detection precision is improved.
Description
technical field [0001] The invention belongs to the technical field of meteorological detection, and in particular relates to an inertial system-based method for compensating the wind speed measurement error of a radiosonde. Background technique [0002] Typhoons are one of the worst natural disasters in the world. In order to achieve a more essential scientific understanding of the natural phenomenon of typhoon, the key technical bottleneck is to conduct multi-element, long-process, and refined direct detection of typhoon, and obtain the temperature, humidity, pressure, wind speed, wind direction, etc. of the typhoon core area. Key meteorological data, among which measuring the wind speed in the typhoon core area is particularly important for predicting the typhoon path and intensity. At present, the measurement of typhoon wind speed is mainly based on wind profiler radar, lidar wind radar, radiosonde, etc. In order to meet the in-situ detection of wind speed in the typhoo...
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IPC IPC(8): G01P21/02G01W1/18
CPCG01P21/025G01W1/18Y02A90/10
Inventor 郑德智李大鹏陈傲北王帅
Owner BEIHANG UNIV