加速度计精密离心机试验的优化设计  

Optimal design of accelerometer test on precision centrifuge

作　　者：苏宝库[1] 李丹东[1] 

机构地区：[1]哈尔滨工业大学控制科学与工程系,哈尔滨150001

出　　处：《中国惯性技术学报》2010年第5期620-624,共5页Journal of Chinese Inertial Technology

基　　金：国家安全重大基础研究项目(973-61334)

摘　　要：针对加速度计精密离心机试验,提出了一种改进的D最优试验设计方法。首先,分析了加速度计在精密离心机测试时的实际量测噪声特性,在此基础上指出传统的优化设计方法,即饱和D最优试验设计,存在工程适用性问题。然后为了改善饱和D最优试验设计的适用性,并且考虑到试验代价和精度的折中关系,提出了D最优改进试验设计方案。该方案将饱和D最优试验谱点作为基本谱点,在基本谱点之间均匀插入其他谱点来降低输入加速度偏差的影响,并通过加权的方法来分配基本谱点和新增谱点的测度,权值的选取依据实际的噪声特性。最后仿真结果表明,该设计方法包含了饱和D最优设计和均匀设计的优点,能够给出更为合理的加速度计精密离心机试验方案设计。A modified D-optimal design method for accelerometer test on precision centrifuge is presented in this paper. First, the measurement noise characteristics of accelerometers in centrifuge test is analyzed, and based on this, it is pointed out that the traditional design method i.e. the saturated D-optimal design method, has the problem of engineering applicability. Second, considering the relationship between experiment cost and precision, a modified experiment design scheme is given to improve the applicability of saturated D-optimal experimental design. This scheme utilizes the spectral points got by saturated D-optimal method as the basic spectral points, and uniformly inserts some points into the basic spectral points to decrease the effects of acceleration setting errors, and then regulates the measurement allocation of basic spectral points and inserted spectral points by the weights which are selected according to practical noise components. The simulation results show that this design method, which synthesizes the merits of the saturation D-optimal design method and the uniform design method, can give more reasonable test plan for accelerometers on precision centrifuge.

关 键 词：加速度计 精密离心机测试 D最优试验设计 均匀试验设计 

分 类 号：U666.1[交通运输工程—船舶及航道工程]