CAJ | 학술논문

根据旋转加速度计重力梯度仪的测量原理，其前放电路可以分为电流放大、求和运算、求差运算和带通滤波四个功能部分。首先推导了将电路输出噪声折算到重力梯度仪输入端的计算方法；其次分析了前放电路是电路噪声的主要来源，并以低噪声为前放电路的首要设计目标，研究了前放电路增益和运放的噪声指标之间的关系，比较了10-8~10-11g各个精度级别的加速度计对电路增益和运放噪声指标的最低需求。最后通过对研制的前放电路的试验测量证明了分析的合理性。
근거선전가속도계중력제도의적측량원리，기전방전로가이분위전류방대、구화운산、구차운산화대통려파사개공능부분。수선추도료장전로수출조성절산도중력제도의수입단적계산방법；기차분석료전방전로시전로조성적주요래원，병이저조성위전방전로적수요설계목표，연구료전방전로증익화운방적조성지표지간적관계，비교료10-8~10-11g각개정도급별적가속도계대전로증익화운방조성지표적최저수구。최후통과대연제적전방전로적시험측량증명료분석적합이성。
According to its working principle, the fore-end circuit in gravity gradiometer of rotating accelerometer can be divided into for four parts which are current amplifiers, adders, substracters and band-pass filters. In this paper, the method of evaluating the RTI (refer to input) noise of the gradiometer circuit is reduced. As the main noise source of the circuit system, the ultimate goal of the fore-end circuit design is lower noise. Then the relationship between the circuit gain and the op-amp noise specifications are studied to compare the minimum requirements with the accelerometer precision varying from 10-8g to 10-11g. The measure results of the developed circuit prove the rationality of the analysis.