Study and Simulation of Fiber Optic Compass Alignment with External Velocity DampingStudy and Simulation of Fiber Optic Compass Alignment with External Velocity Damping

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) Abstract: Initial alignment of strap down inertial system is a hot topic at home and aboard recently, and its precision is closely related to the precision of navigation system

Since the error of the initial alignment is transmitted in the form of schuler cycle, the traditional compass can realize the self-alignment by adding the damping units

But the schuler condition can also be damaged, and this leads to the errors caused by external environment accelerations such as carrier moving acceleration and the sea wave acceleration added to the system, which consequently reduce navigation accuracy

In this paper, a simulation of compass alignment on the base of introducing external velocity damping is given

The outstanding advantage of introducing velocity can be obtained

The paper gives principle diagram, loop circuit design and parameter deduction

The results of an extensive simulation study indicate that the external velocity damping method can effectively eliminate ill effect of disturbing accelerations

Meanwhile, the results also indicate that the external velocity measurement precision may have constraint effect on the alignment precision, so it demands a high precision velocity sensor in practical use

However, recent velocity sensor can immediately meet the demand

Keywords: Simulation;Inertial Alignment;Velocity Damping;Fiber Optic Compass 下载PDF阅读器 PDF全文下载: 初稿 ( 264 ) 作者简介: 通信联系人: 【收录情况】 中国科技论文在线: 郭静

) 摘要: Initial alignment of strap down inertial system is a hot topic at home and aboard recently, and its precision is closely related to the precision of navigation system

Since the error of the initial alignment is transmitted in the form of schuler cycle, the traditional compass can realize the self-alignment by adding the damping units

But the schuler condition can also be damaged, and this leads to the errors caused by external environment accelerations such as carrier moving acceleration and the sea wave acceleration added to the system, which consequently reduce navigation accuracy

In this paper, a simulation of compass alignment on the base of introducing external velocity damping is given

The outstanding advantage of introducing velocity can be obtained

The paper gives principle diagram, loop circuit design and parameter deduction

The results of an extensive simulation study indicate that the external velocity damping method can effectively eliminate ill effect of disturbing accelerations

Meanwhile, the results also indicate that the external velocity measurement precision may have constraint effect on the alignment precision, so it demands a high precision velocity sensor in practical use

However, recent velocity sensor can immediately meet the demand

关键词: Simulation;Inertial Alignment;Velocity Damping; Fiber Optic Compass Guo Jing 1,

Qian Dong 2,* ( 1、 College of Automation, Harbin Engineering University

2、 College of Automation, Harbin Engineering University

钱东

 Study and Simulation of Fiber Optic Compass Alignment with External Velocity Damping[EB/OL]

北京:中国科技论文在线

钱东 * ( 哈尔滨工程大学自动化学院

总览 评价 郭静

[2009-10-09]

http://www

paper

edu

cn/releasepaper/content/200910-62

发表期刊: 暂无

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