Generation of multi dimensional analog signals and calibration on measurement error of light screen arrays

DOI:	10.11809/bqzbgcxb2023.02.040
Keywords:	photoelectric test technique; light screen array; calibration; semi physical simulation; signal modeling
Abstract:	To improve the calibration accuracy of a light screen array (LSA), this paper proposes a multi dimensional analog signal generation method, which can calibrate the measurement results of multiple flight parameters of a projectile. According to the measurement model of the LSA, this paper determines the mapping relationship between the signal sequence of the LSA and the flight parameters of the projectile, and provides a theoretical basis for generating multi dimensional analog photoelectric signals. Then, a set of calibration platform for the LSA with several general instruments as the core is constructed, and analog signals close to the real LSA are created and generated by the SystemVue software. A random shooting test of a simulated projectile is carried out based on this platform, and the calibration parameters such as the maximum absolute error and mean absolute error between the reference value and the measured value are obtained. Compared with the target coordinate results of live firing, this method achieves a calibration error of less than 1 mm. In addition, it has advantages in calibration accuracy, experimental efficiency, safety and operation cost.
Issue:	Vol. 44 No. 2 (2023)
Published:	2023-02-28
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