红外稳定平台装调误差对视线角速度的影响分析

陈争; 付奎生; 丁海山

红外稳定平台装调误差对视线角速度的影响分析

陈争^1,,
付奎生^{1, 2},
丁海山¹

1.
中国空空导弹研究院，河南洛阳 471009
2.
航空制导武器航空科技重点实验室，河南洛阳 471009

基金项目:

中国空空导弹研究院创新基金 CKJ0000

详细信息

作者简介:
陈争（1985-），男，工程师，硕士，主要研究方向为稳定平台式红外目标位标器总体设计。E-mail：water5218@qq.com

中图分类号: TJ765.3
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出版历程
- 收稿日期: 2020-06-11
- 修回日期: 2021-01-25
- 刊出日期: 2021-02-20

Analysis of the Influence of Installation Errors of an Infrared Stabilized Platform on Line-of-sight Angular Velocity

1.
China Airborne Missile Academy, Luoyang 471009, China
2.
Aviation Key Laboratory of Science and Technology on Airborne Guided Weapons, Luoyang 471009, China

摘要

摘要: 框架式稳定平台中的装调误差影响视线角速度的测量精度。给出了框架轴系偏差的数学描述，在此基础上研究了轴系偏差和陀螺敏感轴交叉耦合情况下三自由度框架式红外稳定平台对视线角速度的计算方法。并比较了这两类装调误差对视线角速度测量精度影响的大小。仿真结果表明，通过对装调误差补偿，视线角速度的测量精度可显著改善。所得结果对新型框架式稳定平台系统的误差指标分配具有重要的参考价值。
- 稳定平台 /
- 装调误差 /
- 框架轴系 /
- 视线角速度
Abstract: Installation errors of a stabilized platform with a frame structure affect the calculation accuracy of the line-of-sight (LOS) angular velocity. Mathematical descriptions for the axis system deviation of frames are given. Based on these, calculation methods for a three degree- of-freedom infrared stabilized platform are studied under the conditions of axis system deviation and cross coupling of sensitive axes of gyros. The influences on the measuring accuracy of LOS angular velocity caused by these two kinds of installation errors are compared. It is shown by simulation results that compensating for installation errors can effectively improve the measuring accuracy of LOS angular velocity. The results are important for error index decomposition for the design of a late-model-stabilized platform with a frame structure.
- stabilized platform /
- installation error /
- axis system /
- LOS angular velocity

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图 1 稳定平台系统示意图

Figure 1. Schematic diagram of stabilized platform system

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图 2 4个坐标系之间的变换关系

Figure 2. Transformation of four coordinate systems

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图 3 框架轴系偏差时各坐标系之间的变换关系

Figure 3. Transformation of coordinate systems with axis system deviation

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图 4 陀螺的输出

Figure 4. Outputs of gyroscopes

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图 5 框架角曲线

Figure 5. Curves of frame angles

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图 6 仿真结果比较图

Figure 6. Comparison with simulation results (solid line shows the result of neglecting all errors; dash dot line shows the result of neglecting alignment error of gyros; dash line shows the result of neglecting axis system deviation; solid line with "+" shows the result of considering all errors)

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图 7 仿真结果比较（局部放大）

Figure 7. Comparison with simulation results(part magnified)

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表 1 装调误差参数设置

Table 1. Parameters setting of installation errors

	Axis system deviation /°				Alignment error of gyros/°
	(α₁, β₁)	(α₂, β₂)	(α₃, β₃)	(α₄, β₄, γ₄)	(α₅, β₅)	(α₆, β₆)	(α₇, β₇)
1	(0, 0)	(0, 0)	(0, 0)	(0, 0, 0)	(0, 0)	(0, 0)	(0, 0)
2	(0, －0.02)	(0.02, 0.1)	(－0.03, 0)	(0.03, 0.08, 2.5)	(0, 0)	(0, 0)	(0, 0)
3	(0, 0)	(0, 0)	(0, 0)	(0, 0, 0)	(－0.05, 0.04)	(0.03, －0.4)	(－0.02, 0.1)
4	(0, －0.02)	(0.02, 0.1)	(－0.03, 0)	(0.03, 0.08, 2.5)	(－0.05, 0.04)	(0.03, －0.4)	(－0.02, 0.1)

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参考文献(7)

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