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   捷联惯导 在 航空航天科学与工程 分类中 的翻译结果: 查询用时:0.03秒
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捷联惯导     
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  sins
Variation components were analyzed in the following kinship groups: for batch size, in full sibs; for the number of juveniles per cocoon, between sibships, full sins, and replicates; and for juvenile weight, in full sibs and polyzygotic twins.
      
Filter method and its consistency of double-star position/SINS integrated system
      
Integrated navigation system and experiment of a low-cost and low-accuracy SINS/GPS
      
When SINS (strap-down inertial navigation system) is combined with GPS, the observability of the course angle is weak.
      
This trend is aggravated further when using low-cost and low-accuracy SINS.
      
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  strap-down ins
The strap-down INS navigation computation diagram is expressed in Figure 3.
      
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This paper gives the comparasion between the gyroscope for a platform inertial navigation system and that for a strapdown inertial navigation system, and thence describes the Performance requirements on gyroscope used in strapdown inertial navigation system of the vehicle. Mathematical model of a strapdown rate gyro and its drift error is derived in a dynamic environment. the analysis for drift error is made, and an expression of drift error is presented. Finally, the dynamic error of the strapdown rate gyro...

This paper gives the comparasion between the gyroscope for a platform inertial navigation system and that for a strapdown inertial navigation system, and thence describes the Performance requirements on gyroscope used in strapdown inertial navigation system of the vehicle. Mathematical model of a strapdown rate gyro and its drift error is derived in a dynamic environment. the analysis for drift error is made, and an expression of drift error is presented. Finally, the dynamic error of the strapdown rate gyro in the dynamic environment is estimated, using random process theory.

本文从比较平台式与捷联式惯导系统的陀螺仪角度出发,叙述了飞行器捷联惯导系统对陀螺仪性能的要求;推导了动态环境下捷联速率陀螺仪的数学模型及其漂移误差的数学模型;对漂移误差进行了分析,并给出了漂移误差的表达式;最后,用平稳随机过程理论估算了动态环境下捷联速率陀螺的动态误差。

In this paper, a ptactical open-loop alignment scheme for strapdown inertial navigation systems is discussed in detail. The alignment process is separated into two steps, i.e.,coarse alignment, or analytical alignment, and open-loop fine alignment. Gram-Schmidt method, which can result in an ideal orthogonal matrix, is used to orthogonalize coarse alignment matrix. Least Squares estimators are used to estimate instantaneous misalignment angle between the true geographic frame and the computed one, which is determined...

In this paper, a ptactical open-loop alignment scheme for strapdown inertial navigation systems is discussed in detail. The alignment process is separated into two steps, i.e.,coarse alignment, or analytical alignment, and open-loop fine alignment. Gram-Schmidt method, which can result in an ideal orthogonal matrix, is used to orthogonalize coarse alignment matrix. Least Squares estimators are used to estimate instantaneous misalignment angle between the true geographic frame and the computed one, which is determined by the coarse alignment matrix. To eliminate efficiently the affections of environment disturbance on alignment process the misalignment angle is divided into two components, i. e., instantaneous one and average one. All measurement equations used to estimate the two components are in the same form. This feature will be helpful in implementing the scheme in a real strapdown sys-tem, since it can reduce the burden on on-line computer. Lowpass digital filters are introduced into the open-loop alignment process to enhance the accuracy and shorten the time needed.Digital simulations are employed to verify the effectiveness of such an alignment scheme. The simulation results reveal that this scheme can reach the accuracy superior to 1 arc-minute in azimuth misalignment and less than 6 minutes is needed to complete the alignment process under the simulation conditions listed in Table 1 . Other results also indicate that this scheme is efficient and satisfactory.

本文对一种捷联惯导系统的开环初始对准方法作了详尽的讨论。对准过程分作二步完成,即解析对准与开环精对准。根据解析对准的具体特点,采用了Gram-Schmidt正交化方法来确保所得粗对准矩阵的正交性,最小二乘估计器的应用免除了最佳滤波器对各种噪声模型的要求。并且,开环对准中还引入了低通数字滤波器来改善对准的精度及快速性。不同条件下的数字仿真用来验证这种对准方法的可行性,取得了满意的结果。

This paper presents an alignment method of strapdown INS in a swaying vehicle which conbines the least square estimation method with the real-time updating to an astitute matrix. The given algorithm is simulated in various swaying conditions and compared, with the classical gyrocompassing approach The simulation results indicate that this method effectively improves the alignment performance, and the alignment time of azimuth is shortened by 50% as compared with that iu the gyrocompassing approachin the same...

This paper presents an alignment method of strapdown INS in a swaying vehicle which conbines the least square estimation method with the real-time updating to an astitute matrix. The given algorithm is simulated in various swaying conditions and compared, with the classical gyrocompassing approach The simulation results indicate that this method effectively improves the alignment performance, and the alignment time of azimuth is shortened by 50% as compared with that iu the gyrocompassing approachin the same simulation conditions. ...

本文提出了一种粗对准姿态阵的实时修正和最小二乘估计相结合的捷联式惯导系统在晃动基座上的对准方法。给出的算法在几种不同的晃动条件下进行了仿真计算,并和经典的陀螺罗经对准法作了比较。结果说明这种方法有效地改善了捷联惯导系统在晃动条件下的对准性能。在同样的模拟环境下,与罗经对准法相比,方位对准时间缩短将近一倍。

 
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