CAJ | 학술논문

针对电磁法仪器标定需求，提出基于伪随机互相关辨识的标定方法。论述逆重复m伪随机编码序列的产生方法，从自相关函数出发，推导逆重复m序列的频谱解析式。分析互相关法系统辨识进行仪器标定的原理，给出以逆重复m序列为标定信号源时仪器和磁场传感器的标定方程，并讨论逆重复m序列的参数选取原则。最后，采用相关辨识分别对测量通道和感应式磁场传感器进行标定测试。实测结果表明，标定结果幅度误差小于0．2％，相位误差小于0．5°；标定频率分辨率为0．244 Hz，与传统的方波标定相比效率提高了75倍。该标定方法准确快速，频率分辨率高，可广泛应用于电子仪器标定。
침대전자법의기표정수구，제출기우위수궤호상관변식적표정방법。논술역중복m위수궤편마서렬적산생방법，종자상관함수출발，추도역중복m서렬적빈보해석식。분석호상관법계통변식진행의기표정적원리，급출이역중복m서렬위표정신호원시의기화자장전감기적표정방정，병토론역중복m서렬적삼수선취원칙。최후，채용상관변식분별대측량통도화감응식자장전감기진행표정측시。실측결과표명，표정결과폭도오차소우0．2％，상위오차소우0．5°；표정빈솔분변솔위0．244 Hz，여전통적방파표정상비효솔제고료75배。해표정방법준학쾌속，빈솔분변솔고，가엄범응용우전자의기표정。
Aiming at the demand of electromagnetic instrument calibration,a calibration method based on cross correlated identification using pseudorandom signal is proposed.The generation method of invert-repeated pseudo-random encoding m-sequence is discussed.The spectral analytic expression of the invert-repeated m-sequence is deduced starting from the self-correlation function.The principle of in-strument calibration based on cross correlated identification is analyzed;the calibration equations of the instrument and the magnetic field sensor are given when the invert-repeated m-sequence is used as the calibration signal source.The parameter selection principle of the invert-repeated m-sequence is discussed.Finally,calibration tests of the instrument and the magnetic field sensor were conducted re-spectively based on correlated identification.The calibration results show that the amplitude error is less than 0.2%,the phase error is less than 0.5 °and the calibration frequency resolution is 0.244 Hz;compared with traditional square wave calibration method,the cali-bration efficiency is improved by 75 times.The proposed calibration method is accurate,fast,has high frequency resolution and can be widely used in electronic instrument calibration.