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.
Design and implementation is critically important for micro electro mechanical systems (MEMS) based devices, modules. As a typical instance, modern attitude and heading reference systems (AHRS) generally use Kalman Filter to integrate gyroscopes with some other augmenting sensors, such as accelerometers and magnetometers, so as to provide a long term stable orientation solution. While warpage of printed...
A Product-Level Reliability Estimator (PLRE), which calculates failure rate of a chip as a function of use conditions, has been developed for the first time. Major wafer-level failure mechanisms such as Time-Dependent Dielectric Breakdown (TDDB) and Electro Migration (EM) are included. By applying PLRE to the product with advanced CMOS technology, contributions from each block and each failure mechanism...
In this paper, we will discuss the oscillation of solutions of higher-order nonlinear delay dynamic equations on time scales, which have the following form $$S_n^\Delta(t, x)+p(t)f(x(\tau(t)))=0.$$ We will establish some oscillation criteria for these dynamic equations. Our results improve some previously obtained ones.
In this paper, based on the actual design of gear during the production process as well as the gradual formation of gear meshing gear principle and the principle of the establishment of a non-circle gear tooth profile curve of the mathematical model parameters. And then combined with MATLAB and Pro / E to achieve the whole parameters design of the gear, First of all in the MATLAB programming environment...
A novel translational parallel manipulator with three identical legs is presented. The mobility and the selection of the actuated joints of the manipulator are addressed based on the screw theory. The kinematic problems, singularity and dexterity of the mechanism are discussed according to the different actuation methods. When the rotary actuation method is adopted, the Jacobian matrix is similar...
Frequency estimation plays a crucial role in direction estimation system, of which the measurement error may directly influence the reliability of orientation measurement results. Consequently, to improve the precision of frequency estimation becomes very necessary. This article describes the causing of barrier affection, analyses the characteristic of CZT (Chrip-Z transform), and proposes a hybrid...
Based on the single-opened-chain (SOC) unit theory, a new parallel mechanism with two translational and one rotational (2T1R) degrees of freedom is put forward. Both the forward and the inverse analytical solutions of the moving platform's positions are derived. The virtual prototype model of the mechanism is established by use of the ADAMS software. According to the simulation of the virtual prototype,...
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.