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In this paper, a novel micromachined vibratory gyroscope is proposed, where a two degree-of-freedom (2-DOF) architecture with two masses and three springs is utilized in both drive-mode and sense-mode. The 2-DOF dynamic structure provides the inherently robustness of both modes against structural and environmental variations. The proposed gyroscope demonstrates drive-mode 3-dB bandwidth of 190 Hz...
The relative position between magnetic target and the device installed on underwater vehicle, is determined by measuring magnetic field magnitude and gradients of target on condition that geomagnetic field anomaly can be viewed as a magnetic dipole target. The relationship between the errors of magnetic field magnitude, gradients and the variation of platform attitude and its effect on localization...
Zero Velocity Update (ZUPT) utilizes the zero velocity condition for stationary Strapdown Inertial Navigation System (SINS), executes navigation errors estimation and emendation to control SINS position growth. The improved filter estimation ZUPT is proposed in this paper. Two technologies, separate-bias Kalman filter and yaw error rapid estimation, are applied in the proposed method. Separate-bias...
A initial alignment algorithm in the inertial frame based on the alignment application of Kalman filter was presented. State and observation equations of strapdown inertial navigation system (SINS) are established using Kalman filter by the gravity vector projected in the inertial frame, and the initial alignment of the SINS based on the inertial frame on stationary base was compared with the alignment...
Highlight detection is a challenge task in soccer video analysis. Using Web-casting text as external knowledge is proved to be a short cut to achieve both efficiency and effectiveness. Based on the previous framework using Web-casting text, we have improved the processes of video time detection and highlight boundary detection. Our method can detect the transparent time bar and can achieve acceptable...
With the development of the dynamic base transfer alignment how to resolve accuracy evaluation is significantly important to determine transfer alignment program and value navigation system performance. The smoothing algorithm is a method to evaluate accuracy evaluation. This paper deeply analyzes the method which adopts fixed-point and fixed regional smoothing technology to evaluate the accuracy...
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