CAJ | 학술논문

为了实现应用精密离心机对捷联惯导系统不拆分整体标定时各加速度计误差模型系数进行精确辨识,分析了可能影响加速度计标定精度的离心机误差源进而建立了相应的坐标系.在考虑各加速度计与反转平台轴线距离的情况下,应用齐次变换法计算了各加速度计各轴实际的比力输入,结合给定的加速度计误差模型,设计了一种可辨识误差模型中全部二阶误差模型系数的测试方法.仿真结果表明,该方法经修正离心机误差后可以有效地提高所有误差模型系数的标定精度,并能给出各加速度计与反转平台轴线的距离.仿真还分析了离心机误差对标定精度的影响,结果表明:离心机误差项主要影响1号加速度计 KF、KP、KPP 的标定精度,而对于 KII、KIO 的标定无影响;另外主要影响2号加速度计 KF,KI,KII 的标定精度,以及3号加速度计 KF、KO 的标定精度.
위료실현응용정밀리심궤대첩련관도계통불탁분정체표정시각가속도계오차모형계수진행정학변식,분석료가능영향가속도계표정정도적리심궤오차원진이건립료상응적좌표계.재고필각가속도계여반전평태축선거리적정황하,응용제차변환법계산료각가속도계각축실제적비력수입,결합급정적가속도계오차모형,설계료일충가변식오차모형중전부이계오차모형계수적측시방법.방진결과표명,해방법경수정리심궤오차후가이유효지제고소유오차모형계수적표정정도,병능급출각가속도계여반전평태축선적거리.방진환분석료리심궤오차대표정정도적영향,결과표명:리심궤오차항주요영향1호가속도계 KF、KP、KPP 적표정정도,이대우 KII、KIO 적표정무영향;령외주요영향2호가속도계 KF,KI,KII 적표정정도,이급3호가속도계 KF、KO 적표정정도.
In order to accurately identify the error model coefficients of various accelerometers when using precision centrifuge to calibrate strapdown inertial navigation system without disassembling, the centrifuge error sources which may affect the accelerometer calibration accuracy were analyzed and the corresponding coordinate systems were established. The actual specific force input along each axis of each accelerometer was calculated by homogeneous transformation in consideration of the distances from accelerometers to the axis of counter-rotating platform. By combining with the given accelerometer error model, a measurement method which could identify all the second-order model coefficients was put forward. The simulation proves that this method can effectively increase the calibration accuracy of all the error model coefficients after compensating the centrifuge errors and can estimate the distances from the accelerometers to the axis of counter-rotating platform. The impacts of centrifuge errors on calibration accuracy were also analyzed by simulation, and it is shown that the centrifuge errors mainly affect the calibration accuracy of KF, KP, KPP of No.1 accelerometer, the KF, KI, KII of No.2 accelerometer, the KF, KO of No.3 accelerometer, and have no effects on KII, KIO of No.1 accelerometer.