机床与液压
機床與液壓
궤상여액압
MACHINE TOOL & HYDRAULICS
2014年
12期
6-12
,共7页
精密离心机%陀螺加速度计%输入比力%齐次变换%误差模型系数
精密離心機%陀螺加速度計%輸入比力%齊次變換%誤差模型繫數
정밀리심궤%타라가속도계%수입비력%제차변환%오차모형계수
Precision centrifuge%Gyro accelerometer%Input specific force%Homogeneous trans-formation%Error model coefficient
为了研究精密离心机自身误差对陀螺加速度计模型系数标定精度的影响，分析了离心机各个误差源，从输入比力和相对惯性空间角速率两个方面讨论了离心机误差源对加速度计参数标定的精度影响，给出了被试加速度计输入加速度和角速度的精确表达式。应用最小二乘法对误差模型参数进行辨识，且计算了在各误差源作用下对于参数辨识精度的影响程度。根据仿真结果，找出了某些离心机误差对加速度计误差系数标定的影响关系，为按照加速度计的标定精度来确定离心机的精度打下了理论基础。
為瞭研究精密離心機自身誤差對陀螺加速度計模型繫數標定精度的影響，分析瞭離心機各箇誤差源，從輸入比力和相對慣性空間角速率兩箇方麵討論瞭離心機誤差源對加速度計參數標定的精度影響，給齣瞭被試加速度計輸入加速度和角速度的精確錶達式。應用最小二乘法對誤差模型參數進行辨識，且計算瞭在各誤差源作用下對于參數辨識精度的影響程度。根據倣真結果，找齣瞭某些離心機誤差對加速度計誤差繫數標定的影響關繫，為按照加速度計的標定精度來確定離心機的精度打下瞭理論基礎。
위료연구정밀리심궤자신오차대타라가속도계모형계수표정정도적영향，분석료리심궤각개오차원，종수입비력화상대관성공간각속솔량개방면토론료리심궤오차원대가속도계삼수표정적정도영향，급출료피시가속도계수입가속도화각속도적정학표체식。응용최소이승법대오차모형삼수진행변식，차계산료재각오차원작용하대우삼수변식정도적영향정도。근거방진결과，조출료모사리심궤오차대가속도계오차계수표정적영향관계，위안조가속도계적표정정도래학정리심궤적정도타하료이론기출。
In order to study the impacts of accuracy centrifuge error on the coefficient accuracy of gyro accelerometer model,al error sources of centrifuge were analyzed.The impacts of centri-fuge error sources on the coefficient calibrating accuracy of gyro accelerometer were discussed from the aspect of input specific force and angular rate relative to inertial space.Accurate expres-sions of input acceleration and input angular rate of tested accelerometer were obtained,error model coefficients were determined by using least square method and the impact degree of error sources on coefficient identification accuracy is evaluated in this paper.The relationships be-tween some centrifuge errors and calibration accuracy of error coefficients of accelerometer were established and it builds a theoretical foundation for the calibrating accuracy of accelerometer to decide the accuracy of centrifuge.
