Abstract: One of the challenges restricted rubbing quantitative diagnosis is that vibration method cannot be effective applied to rubbing fault localization. Therefore, an acoustic emission (AE) beamforming array was presented to localize rotor-stator rubbing fault of rotating machinery. Firstly, finite eleme...
Abstract: To solve the problem that it is hard to identify failure mechanism consistency in accelerated degradation test, taking a Gamma degradation model as research object, an identification method of failure mechanism consistency based on acceleration coefficient constant principle was proposed. The theory...
Abstract: High false alarm of heat detection and smoke detection used in aircraft is an existed question for aircraft fire detecting. The production rule of gaseous combustion products in fires was analyzed, and CO2 was put forward as parameter of fire detection. Through accurate monitoring of CO2 concentrati...
Abstract: According to the characteristics of underwater navigation sensors, the method for determining the initial position based on dead reckoning (DR) trajectory translation strategy in the initial period of position was proposed to improve the accuracy of the initial position of DR system. This method com...
Abstract: How to accurately analyze and assess reliability and life of smart meters under the multi-stress and multi-parameter condition is a very hot research topic currently. Firstly, the performance of smart meter under conditions of temperature, humidity, electrical stress, vibration and magnetic field we...
Abstract: Traditional evaluation methods of accelerated degradation testing (ADT) are based on precise degradation data to conduct reliability and lifetime assessment. However, with interfere of the uncertainties from human factors, the test data can be imprecise represented by interval rather than precise da...
Abstract: To solve approach and landing problem of variable configuration reusable launch vehicle (RLV) with multi-control surfaces, a design method of approach and landing trajectory was proposed. The landing trajectory was divided into steep glide landing trajectory and flare landing trajectory. The control...
Abstract: To precisely track the gray targets undergoing drastic changes in the image sequence, a new tracking algorithm based on edge information was proposed. Firstly, obtained by the two-concentric-circular-window operator, a nonlinear edge detection algorithm was proposed to get high quality edge informat...
Abstract: When the temperature frequency stability of the temperature compensated crystal oscillator (TCXO) is required better than ±1×10-6 in a wide temperature range, the rate of once success for the traditional compensation method is low. The compensation precision influences were carefully analyzed, and t...
Abstract: Aimed at the requirement for intercepting maneuvering targets with impact angle constraint, based on the technology of extended disturbance observer (EDO), a novel finite-time convergence guidance law was presented. Considering the relative motion between missile and target, the time-varying uncerta...
Abstract: The bolted joints, which are commonly used in aero-engine structure, have important influences on dynamic characteristics of aero-engine. The thin-layer element method can simulate complex connection structure and maintain the structure integrity. Based on the thin-layer element method, the modeling...
Abstract: Considering the existence of moving target, moving threat and emergent threat in complex environment, the method of dynamic fluid disturbance and the rolling optimization strategy were combined for the three-dimensional dynamic path planning of unmanned aerial vehicle (UAV). Based on the motion info...
Abstract: The energetic charged particle in the radiation belts of earth is the main environmental factor which can result in performance degradation and even failure of the material and device on spacecraft, so the accuracy of radiation belts model which is being used during design phase of spacecraft is ver...
Abstract: The two-dimensional space-time fractional dispersion equation is obtained from the standard two-dimensional dispersion equation by replacing the first order time derivative by the Caputo fractional derivative, and the two second order space derivatives by the Riemann-Liouville fractional derivatives...
Abstract: Electromagnetic spacecraft formation flying is a new type of spacecraft formation using electromagnetic forces between spacecraft to control relative motion. Primary principles of the relative motion of a two-craft electromagnetic formation were discussed. Analytical solutions of control magnetic mo...
Abstract: As a key technique in automatic target detection, robust detection of small infrared target at low signal-to-noise ratio has received a lot of attentions. In order to detect infrared (IR) small targets efficaciously, the apparent characteristics and visual saliency of infrared small target were both...
Abstract: The reusable liquid rocket engine (RLRE), which can reduce the space launch cost, is one of the future spacecraft development directions. It is difficult to assess the RLRE availability for its complexity, differences of the component life model and other uncertain factors. As an example, the availa...
Abstract: Two kinds of traditional group delay calibration methods for global navigation satellite system (GNSS) signal simulator channels have been reported so far,which are phase transition point method and correlation peak method. Both of them measure the group delay in a special simulation scenario with z...
Abstract: Through the study on nonlinear effect of digital image pixel grid, the one-dimensional and two-dimensional time evolution equations model of nonlinear effect between pixels were established, the analysis of the equation model shows that the image was discrete in space, but on the structure of mutual...
Abstract: The quantitative or qualitative constraints of the warship spare parts allotment optimization problems are mainly focused on by the group of international and domestic academics, the mixed problems which include all of them are relatively less in the previous papers. Firstly, the warship carrying sp...
Abstract: Software vulnerabilities are one of the root causes of network security problem, and software vulnerability detection is currently a hot topic in the field of network security. Dynamic symbolic execution is one of the most studied approaches for vulnerability detection recently. Aimed at the problem...
Abstract: In order to study the atomization mixing characteristics of liquid fuel in scramjet combustor as well as determine the key factors influencing the atomization so as to realize efficient combustion, the flow field structure of the shock wave, jet penetration and induced bow shock strength of liquid j...
Abstract: All time-delay stability for biological systems shows that the time-delay system possess good reliability, so this issue has always been the highlight of the scholars research. However, researchers usually adopt the traditional mathematical methods or numerical calculation methods. Based on Hurwitz ...
Abstract: The influence degree analysis of source data mainly depends on manual work in the current maintenance of civil aircraft technical publications. This process forcefully depends on professional ability of staff, so it can't guarantee the reasonable priority of source data in implementation of maintena...
Abstract: A model based definition (MBD) dataset definition method based on the association rules was proposed to meet the requirement of product full three dimensional digitalization development. Firstly, this method thoroughly decomposed all the design, manufacturing and inspection standards used in the pro...
Abstract: A hybrid adaptive and iterative learning method was proposed to obtain distributed control protocols for multiple manipulator systems with undirected interaction topology to achieve consensus tracking of the specified desired reference trajectory. By introducing an appropriate adaptive iterative lea...
Abstract: Semiconductor lasers are widely used as pump and probe laser light source in atomic physics and quantum science equipment researches. The characteristics of the laser diodes, such as threshold current, wavelength, output power, lifetime, are temperature dependent, therefore it is vitally important t...
Founded: 1956 (
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Sponsor: Ministry of Industry and Information Technology of the People's Republic of China
Sponsored by: Beijing University of Aeronautics and Astronautics