The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
For micro-mechanical gyro in practical engineering application, because a huge number, the original gyro test method will no longer suitable. According practical conditions of using micro-mechanical gyros and its self features, the input angular velocity of the gyro is very small, and the micro-mechanical gyro performances the good linearity under the low angular velocity input, a new gyroscope measurement...
With the development of network technology, distance learning is one of the fastest-growing components of higher education, teachers and students in universities and colleges are facing higher requirements. Firstly technology changed of distance learning was introduced, and analyzed advantages of distance learning, and why distance learning is chosen. Secondly adopted the college level examination...
With the network technology rapid development, inadaptation problem is existing in distance learning. Firstly inadaptation was introduced. Psychology test, experience analysis method were adopted and curriculum evaluation method to analyze learning inadaptation in distance learning. Finally, from viewpoint of teaching and viewpoint of learning, solution of inadaptation was proposed. Its application...
According to a certain type of micro-machined gyroscope signal characteristics, wavelet transform de-noising method was adopted. The measured noise signal mainly concentrated in the low-frequency phase, overlapping with the gyro signal spectrum, and therefore the wavelet should have a certain degree of vanishing moments, in order to reduce the calculation and the distortion of reconstructed signal...
According to the attitude update request of micro-inertial measurement system in some Aircraft, a new method Rodrigues parameters attitude update algorithm was put forward attitude update. And then attitude differential equations and attitude matrix were proposed based on Rodrigues parameters. Under angle velocity as the input with low-accuracy micro-mechanical velocity gyro, attitude errors were...
According to the characteristics of applicable environment and MIMU itself, a new Kalman filter was designed. The shallow integrated mode was adopted for improving fault-tolerant and reliability, and considering the low-precision MIMU, mathematics model of integrated navigation system was reasonably simplified. An adoptive Kalman filter was designed through judging average value and variance of the...
Based on temperature drift data of some micro-mechanical gyro, grey modeling research was carried out. Analyzing the essence of the traditional GM(1,1) model, and the logarithm transformation mathematic processing method was given for improving the smoothness of the primary data sequence and the approximate degree of the fitting equation. Then we built up a improved GM(1,1) model, compared with traditional...
A new method for analyzing non-stationary signal designated as local wave analysis introduced. The single was decomposed in several intrinsic mode functions with local wave decomposition. Local wave decomposition method can decompose signal into several intrinsic mode functions, and the decomposition process is adaptive. The signal of micromechanical gyro was decomposed using the local-wave decomposing...
Lithium solid electrolyte 2Li 3 Bi . 3LiCl was prepared and was characterized by X-ray diffraction and X-ray photoelectron spectroscopy (XPS). The electrical conductivity of the prepared sample was determined from room temperature to 250 o C by PAR 368-1 AC-impedance spectrometer. The frequency measurement range was between 4 Hz and 100 kHz. The experimental results showed that the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.