The Performance Analysis and Optimum Design Based on FEM about an Azimuth Reductor Box of Radar Antenna-seat; Alignment and Micro-Displace Measurement with Four-Quadrant Photo-Detector by System Modeling 某型雷达天线座方位减速器箱体有限元分析和优化设计基于系统建模的四像限光电探测器对准与微位移测量系统
Then, on the basis of this SINS error model, through the analysis of computer simulation, a fast estimation method of the azimuth error Φ D is proposed for the initial alignment of SINS on stationary base, and the time of initial alignment is reduced greatly. 然后基于SINS误差模型的特点,通过对所采用卡尔曼滤波器仿真结果的分析,提出了一种快速估计方位失准角ΦD的方法,从而大大缩短了初始对准时间,提高了对准速度;
A design of reduced order observer is made to estimate the azimuth alignment error using the outputs of north and east accelerometers. Mean while, the state feedback method is used to improve the dynamic performance of the system. 通过构造一个降维的观测器,利用北向和东向加速度计的测量值重构平台方位对准误差角,同时利用状态反馈改善系统的动态性能。
The results demonstrate three-position alignment to raise the degree of observability of azimuth error angle and vertical axis gyro error., accelerates the convergence of error. Thus increase the system alignment and calibration accuracy. 仿真结果表明三位置对准提高了方位误差角及垂直陀螺误差的可观度,从而加速了它们的收敛速度,提高了系统的对准、标定精度。
A study of the effect of azimuth alignment error on guidance accuracy 方位对准误差对制导精度影响的研究
The time of initial alignment is reduced greatly and the accuracy of azimuth alignment is improved. 因此该方法缩短了初始对准时间,改善了方位对准精度。
The selection of the reference image in azimuth interval is discussed, and the influence of the alignment on template training and target classification is discussed too. 分析了方位区间中基准图像的选取及对准过程对模板生成和目标分类的影响程度。
The reason why they are flaws and the more suitable statement about azimuth compass alignment are provided. 分析了原因,并给出了方位罗经对准原理更确切的描述。
Bi-GPS receivers are applied to measure the azimuth angle in terms of initial alignment of the integrated system. 并利用双GPS接收机测量方位角解决了组合系统的初始方位对准问题。
Operational principles of the azimuth rate platform, mechanization equations, distinguishing features of initial alignment, and calibration and compensation for drifts of gyroscopes are discussed in this paper. 文中叙述了方位速率平台的工作原理、力学编排方程、初始对准的特点以及陀螺漂移的标定和补偿;
Study on dynamic azimuth alignment technology of sins for shipboard missile 舰载导弹捷联惯导动基座方位对准技术研究
The initial alignment of antenna is one of key technology in satellite mobile communication system. On the basis of measuring carrier attitude by digital compass, this paper deduces the azimuth and elevation of rotating antenna, and presents a utility initial alignment algorithm of antenna. 天线初始对准技术是移动卫星通讯系统的关键技术之一,在数字罗盘测得载体姿态的基础上,推导出了天线实际转过的方位角和仰角,从而确定了一种实用的天线初始对准算法。
After initial coarse alignment and reaching a position-known point, azimuth error is compensated based on the DR algorithm and the similarity theory. Finally the field-test verifies the alignment algorithms. 在载车初始粗对准之后,行驶一段路程到达一位置已知点,由航位推算结果并运用相似性原理求出初始粗对准的航向误差角,从而修正航向角达到精对准的目的。
In the first time transfer alignment it uses velocity matching plus attitude change matching and mainly performs azimuth alignment and primarily performs horizon alignment. 该方法在对准第1阶段采用速度加姿态变化量匹配方法,主要完成航向对准,同时初步进行水平对准;
This method solves the problem of rapid azimuth alignment on the moving base, dramatically reduces the requirement of carrier's movement and gives a means of measure gyroscope drift. 该对准方法解决了动基座上方位快速对准的难题,大大降低了对载体的机动要求,同时为陀螺测漂提供了手段。
The proposed initial alignment approach was studied. The accuracy of coarse alignment was analyzed, and the nonlinear system model including azimuth error was built. The initial alignment of MIMU was simulated. 设计了基于数字罗盘辅助MIMU的粗对准和基于UKF的非线性精对准方案,分析了粗对准精度,建立了包含航向角误差的非线性对准模型;
When the azimuth misalignment is large, the nonlinear alignment method is studied. 在初始方位失准角为大角度情况下,研究了非线性对准方法。
In the first time alignment, H_ ∞ filter feature being taken advantage of, horizontal alignment was achieved by velocity match. In the second time alignment, Kalman filter being used, azimuth alignment was achieved by velocity plus attitude change match. 第一次精对准利用H∞滤波估计速度快的这一优点,通过速度匹配进行水平对准,第二次精对准采用Kalman滤波通过速度加姿态变化量匹配进行航向对准。
Novel technology for improving estimation accuracy of the azimuth misalignment angle in SINS initial alignment 提高SINS初始对准方位失准角估计精度的方法
In order to improve the velocity of alignment, a fast estimation method of the azimuth error angle is proposed for the initial alignment of INS. The simulation results illustrate the efficiency of the method. 为提高对准速度,文中给出了方位误差角的一种快速估计方法,结果表明该方法是可行的。
The simulation results indicate that the new method greatly improves the convergence speed and the precision of the azimuth misalignment estimation for SINS initial alignment on stationary base. 结果表明,该方法极大地改善了捷联惯导系统静基座初始对准中方位失准角的估计收敛速度和精度。
The second is that the level circuit adopted by azimuth compass aligning circuit can only be two-order and can't be three-order, but as a matter of fact, three-order level circuit can be adopted in azimuth compass alignment. 方位罗经对准回路中,水平回路只能采用二阶调平回路,而不能采用三阶调平回路,而事实上采用三阶调平回路照样可以实现方位罗经自对准。
Azimuth Alignment of Tactical Missile by Means of Strapdown Combination 战术弹利用捷联组合进行方位对准的探讨
The ballistic missile launched on fixed base can make use of triaxial gyro platform compass system to realize all-azimuth self-alignment. 固定基座发射的弹道式导弹,可以利用三轴陀螺平台罗盘系统来实现全方位自对准。
By integrating fast horizontal alignment method and two azimuth alignment methods, iterative alignment scheme on moving base is given. The initial alignment on moving base is implemented by using measured data. 结合水平快速对准方法和两种方位对准方法,给出了动基座迭代对准方案,利用实测数据实现了完全运动状态下的初始对准。
Based on geometric rotation transformation fundamental, another azimuth alignment method by using initial position, GNSS observation positions far from start point and SINS calculating positions is proposed, and error analysis is also made. 根据几何旋转变换原理,提出了利用初始位置、GNSS远距离观测位置和惯导推算位置计算方位失准角的方法,分析了该方法的误差影响因素。
The relation between velocity error observation and large azimuth misalignment angle is derived by using large azimuth misalignment angle error model, and fast coarse azimuth alignment method is proposed. 利用方位大失准角误差模型推导了速度误差观测量与方位大失准角的关系,提出了针对中高精度导航系统的快速概略方位对准方法,并分析了该方法的适用条件。