陀螺力矩器标度因数变化模型及稳定性研究

doi:10.7527/S1000-6893.2013.0178

固体力学与飞行器总体设计

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陀螺力矩器标度因数变化模型及稳定性研究

许丹¹, 陈云霞¹, 梁媛², 康锐¹

1. 北京航空航天大学可靠性与系统工程学院, 北京 100191;
2. 中国航空综合技术研究所, 北京 100028

收稿日期:2012-06-28 修回日期:2013-03-20 出版日期:2013-06-25 发布日期:2013-03-22
通讯作者: 许丹, Tel.: 010-82338909 E-mail: xudan@buaa.edu.cn E-mail:xudan@buaa.edu.cn
作者简介:许丹女, 博士, 讲师, 硕士生导师。主要研究方向: 故障物理, 惯导产品长期稳定性, 高可靠长寿命产品建模与设计分析, 加速试验。 Tel: 010-82338909 E-mail: xudan@buaa.edu.cn

Research of Gyro Torquer Scale Factor Variation Model and Its Stability

XU Dan¹, CHEN Yunxia¹, LIANG Yuan², KANG Rui¹

1. School of Reliability and Systems Engineering, Beihang University, Beijing 100191, China;
2. China Aero-Polytechnology Establishment, Beijing 100028, China

Received:2012-06-28 Revised:2013-03-20 Online:2013-06-25 Published:2013-03-22
Contact: 10.7527/S1000-6893.2013.0178 E-mail:xudan@buaa.edu.cn

摘要/Abstract

摘要：

力矩器作为动力调谐陀螺(DTG)的关键器件,影响着陀螺在贮存条件下的长期稳定性。力矩器标度因数是衡量陀螺稳定性的重要参数。为研究动力调谐陀螺仪力矩器标度因数的变化原理和规律,以故障模式、机理和影响分析(FMMEA)方法为基础,分析贮存条件下陀螺力矩器标度因数变化主机理,确定影响其变化的机理部位和应力类型;结合底层主机理部件胶蠕变和磁钢退磁随环境应力、时间的变化趋势,建立系统层力矩器标度因数变化量的长期预报模型;以某DTG为例,结合其贮存剖面,进行基于模型的贮存稳定性分析,计算得到5年内力矩器标度因数变化值,与历史数据相比较,二者趋势一致,证明本文研究方法的正确性;同时利用建立的变化模型进行陀螺加速性分析,得到陀螺参数的加速因子,为加速退化试验的设计提供依据。

关键词: 动力调谐陀螺, 力矩器标度因数, 加速, 贮存, 稳定性

Abstract:

The torquer is used as a key component in a dynamically tuned gyro (DTG), affecting its long-term stability in storage conditions. The gyro torquer scale factor is a significant parameter for judging gyro stability. To study the principle and tendency of variation for the torquer scale factor of a dynamically tuned gyroscope, the main mechanism is first analyzed in storage condition based on failure mode, mechanisms and effects analysis (FMMEA) method, which determines its key components and the stress types. After studying the tendency of glue creep and alnico demagnetization following environmental stress and time, a long-term variation prediction model of the torquer scale factor is established. Then, a certain DTG is taken as an example, and the storage stability on the basis of the model is analyzed combining with its storage profile. Finally the value of torquer scale factor variation within five years is calculated; meanwhile, a comparison with historical data shows that the two trends are consistent, which proves the validity of this research approach. Furthermore, the acceleration factor is obtained through analyzing the established model which can also be used to study the acceleration characteristic of the gyro, so as to provide a basis for accelerated degradation test design.

Key words: dynamically tuned gyro, torquer scale factor, acceleration, storage, stability

中图分类号:

V241.5

许丹, 陈云霞, 梁媛, 康锐. 陀螺力矩器标度因数变化模型及稳定性研究[J]. 航空学报, 2013, 34(6): 1319-1325.

XU Dan, CHEN Yunxia, LIANG Yuan, KANG Rui. Research of Gyro Torquer Scale Factor Variation Model and Its Stability[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(6): 1319-1325.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

陀螺力矩器标度因数变化模型及稳定性研究

Research of Gyro Torquer Scale Factor Variation Model and Its Stability

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