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弹箭与制导学报 >

2025 , Vol. 45 >Issue 6: 1211 - 1218

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2025.06.031

学术文章

小型化惯组加速度通道温度补偿技术研究

  • 关艳霞 ,
  • 何瑮 ,
  • 梁成相 ,
  • 罗伟锋 ,
  • 韩沛学
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  • 西安航天精密机电研究所,陕西 西安 710100

关艳霞(1987—),女,硕士研究生。E-mail:。

收稿日期: 2025-01-16

  网络出版日期: 2026-01-24

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Research on Acceleration Channels’ Temperature Compensation Technology of Miniaturized Inertial Measurement

  • GUAN Yanxia ,
  • HE Li ,
  • LIANG Chengxiang ,
  • LUO Weifeng ,
  • HAN Peixue
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  • Xi’an Aerospace Precision Mechatronics Institute,Xi’an 710100,Shaanxi,China

Received date: 2025-01-16

  Online published: 2026-01-24

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摘要

惯组内部的温度会随着工作时间不断升高,引起惯性仪表零偏和标度因数的变化,尤其在不断小型化设计后,惯组内部温度场环境更加复杂。惯组的陀螺和石英加速度计的输出受温度变化影响较为明显,导致其在导航系统中的应用受到制约。其中,惯组的加速度通道主要由加速度计、模数转换电路等组成,模数转换电路的性能指标直接影响惯组的精度。本文提出一种加速度通道的温度补偿方法,在模数转换电路无输入电流的情况下,首先在惯组整机的温度场环境中建立模数转换电路自身零位输出与惯组温度场环境之间的温度模型,对模数转换电路自身零位输出进行一次温度补偿,然后连接加速度度通道,再对加速度通道进行一次温度补偿,避免了模数转换电路独立温补时与惯组温度场环境的差异影响惯组的温补精度,最终更加精确地建立了加速度通道随温度变化的模型,提高了加速度通道的温度补偿精度。以某惯组为例,将加速度通道全温零位重复性提升至原来的2倍~10倍,标度因数全温重复性提升至原来的2倍~3倍,通过试验验证了补偿方法的有效性和可靠性,从而提高了小型化惯组在全温范围内的工作精度。

关键词： 小型化; 惯组; 温度补偿; 加速度通道; 模数转换电路

本文引用格式

关艳霞 , 何瑮 , 梁成相 , 罗伟锋 , 韩沛学 . 小型化惯组加速度通道温度补偿技术研究[J]. 弹箭与制导学报, 2025 , 45(6) : 1211 -1218 . DOI: 10.15892/j.cnki.djzdxb.2025.06.031

Abstract

The IMU’s internal temperature continuously rises with the working time,resulting in changes of the inertial sensors’ zero bias and scale factors.Especially after the miniaturization design of the IMU,its internal temperature environment field becomes more complex.The outputs of IMU’s gyros and quartz accelerometers are obviously affected by temperature changes,which restrict their application in navigation systems.The IMU’s acceleration channel is mainly composed of accelerometers and analog-to-digital conversion circuit.The analog-to-digital conversion circuit’s performance level directly affects the IMU’s accuracy.This paper proposes a temperature compensation method of the acceleration channel.Firstly,establishing the temperature model between the own output of the analog-to-digital conversion circuit when there is no input current and the inertial temperature of IMU to compensate for the own output of the circuit.Secondly,compensating the outputs when the acceleration channel is connected.The effects of the temperature differences are avoided when the analog-to-digital conversion circuit is independently compensated which affects the compensation accuracy.The model of acceleration channel variation with temperature is established more precisely,and the temperature compensation accuracy of acceleration channel is improved.Taking an IMU for example,the zero temperature repeatability of acceleration channel is increased to 2-10 times and the scale factor temperature repeatability is increased to 2-3 times,the validity and reliability of the temperature compensation method are verified by experiments,thus improving the working accuracy of the miniaturized IMU in the whole working temperature range.

Key words： miniaturized; Inertial Measurement Unit; acceleration channel; analog-to-digital conversion circuit

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