基于非复位多元加载系统的天平体轴系静校方法研究  

Research on calibration method for obtaining body coordinate system coefficients matrix using non-repositioning calibration system

作　　者：熊琳[1] 王金印[1] 刘家骅[1] 文帅[1] 刘春风[1] 蒋平 

机构地区：[1]中国航天空气动力技术研究院,北京100074 [2]北京宇航系统工程研究所,北京100076

出　　处：《实验流体力学》2015年第6期84-88,共5页Journal of Experiments in Fluid Mechanics

摘　　要：介绍了一种通过测量加载头位移并进行载荷轴系转换的方式获得天平体轴系校准公式的非复位式多元静校系统。基于加载方式建立了载荷地/体轴系转换方法;优化了加载头结构以保证其上所有加载点都位于加载头的纵、横向中心对称线上,从而避免了附加力矩的产生;分析了位移测量方式引入误差的原因并给出了抑制误差的方法。比较采用此静校方法获得的天平公式与采用复位式多元加载静校系统获得的天平公式处理同一次吹风数据的结果表明,本文所述的静校方法所校天平有较为理想的综合加载重复性和综合加载精度。A non-repositioning multi-component calibration system（BCS-100 in CAAA）is developed to study the calibration method for acquiring the body coordinate system coefficients matrix.The algorithm of loads transformation from the geodetic coordinate system to the body fixed coordinate system is established based on the loading method used by BCS-100.The configuration of the loading sleeve is developed to avoid additional moment due to the deviation of the loading direction from the center line of the loading sleeve.The error resulted from the manner of displacement measure is analyzed and the method to reduce the error is proposed also.The differences between the processed experimental result by using the matrix from BCS-100 and the result by using another matrix from a repositioning calibration system for the same balance TG618 Cis analyzed,and the validity of the calibration method expatiated in this paper can be confirmed.

关 键 词：天平 静校 体轴系 位移测量 

分 类 号：V211.752[航空宇航科学与技术—航空宇航推进理论与工程]