Abstract: In order to study the three-dimensional and four-directional braided composites on the basis of an improved unit cell model with rectangular cross-section, the relationship between the geometric properties of the cells and the braiding parameters were deduced with considering the effects of adhesive...
Abstract: If only one limb of the parallel mechanism was driven, this limb can't move in full stroke because of the constraints from other limbs. In order to analyze the essential cause of single limb motion limit in parallel mechanism, the method of screw reciprocal product was adopted to calculate the axial...
Abstract: The node triggering and data transmission in wireless sensor network(WSN) shows an activity pattern. A clustering algorithm activity-aware clustering protocol(AACP) was put forward based on this activity pattern. Sensor nodes were divided into a plurality of clusters by AACP, and then activities wer...
Abstract: The thermal coupling models were established on the positive plate collector, the negative plate collector and the battery plate, which based on the Bernardi heat generation rate model of a single battery. The heat transfer model of battery group was founded as well. In the natural ventilation envir...
Abstract: A control method for a 3-DOF spherical motor was introduced. The 3-DOF spherical motor had three-dimensional orientation measurement ability. Considering the mechanical structure of the spherical motor, XYZ Euler angle was used for the construction of the kinematics model. The dynamic model was esta...
Abstract: Surface analysis methods, a mass loss method, and electrochemical tests were employed to investigate the corrosion behavior of steel Q235 under the synergistic effect of Thiobacillus thiooxidans(T.t) and Bacillus. Scanning electronic microscopy (SEM) results reveal that a densest biofilm was formed ...
Abstract: In a dynamic process, the fiber-optic gyroscope (FOG) generates a nonreciprocal error easily. After analyzing the reason of the FOG generating dynamic error, the principle that structural material performance has a significant influence on the FOG dynamic performance was proposed. Applied different ...
Abstract: With the developing of integrated technology of mechanical, electrical, hydraulic and control and the developing of digital hydraulic technology, a new integrated digital hydraulic actuation system (IDA) was put forward based on digital cylinder and edropump(electric-hydraulic-pump). The system comp...
Abstract: Trailing edge slots are important cooling structures in turbine blade. In order to realize the precise modeling of these structures in bowed-twisted turbine blade and improve the modeling efficiency, a rapid generative modeling method was proposed, including the tool body creation step and the slot ...
Abstract: The UH-60A helicopter nonlinear flight dynamic model suited to evaluate the flying qualities was built. Trim calculation of the model was conducted, stability and controllability derivatives were calculated, and the agreement between the computational results and the referenced data indicated that t...
Abstract: To the synthetic aperture radar (SAR) imaging system which uses compressive sensing (CS) technology, radio frequency interference (RFI) would undermine the priori sparse condition and cause deterioration of image quality, making the subsequent reconstruction algorithm complete the imaging process in...
Abstract: To completely meet the requirements of reliability design in the product designing, an axiom-based designing-in reliability approach was proposed. In light of the axiomatic design principles, products were designed preliminarily to establish their functional requirements, so that according to these ...
Abstract: To solve the problem of high requirements for efficiency and reliability of air ammunition support, on the basis of analyzing impact of each activity on completing assignment in program evaluation and review technique(PERT) networks of support process, activity criticality index, crucial index and c...
Abstract: Considering morphing vehicles with alterable sweep wings, control design and synthesis within full flight envelope was researched. The morphing vehicle model based on switched polytopic systems was established. In this framework, the stability analysis was accomplished by Lyapunov functions. The pre...
Abstract: A kind of disturbance rejection sliding mode control based on backstepping method was studied for trajectory tracking control problem of hypersonic flight vehicle in the presence of uncertain parameters and external disturbances. The nonlinear hypersonic vehicle dynamics model was translated into th...
Abstract: Mental workload is one of the most important factors that affect flight safety. Objective measurement for pilot mental workload is of great significance for the ergonomics evaluation and optimal design of mental tasks in aircraft cockpit display interface. On the basis of event related potential (ER...
Abstract: The dynamic model of hose-drogue aerial refueling system is unduly predigested in the research of autonomous aerial refueling, while high cost, computational complexity and inextensible limitation of hose are not solved by the available modeling methods. In order to overcome above problems, a dynami...
Abstract: In the face of the phenomenon of low overpressure of military airplane cockpits in our country, the design thought of high overpressure cockpits was proposed to realize high work efficiency and comfortable cockpit environment. To solve the contradiction between cockpit weight and environmental effic...
Abstract: Based on the deterministic basis of the surface accuracy for the antenna, computational modeling with the semi-optical path difference as minimum value was established. As a result, a software program for surface measurement and adjustment of reflector antenna was developed. The surface accuracy of ...
Abstract: In order to apply high level architecture (HLA) in some real time systems, real-time performance of run-time infrastructure (RTI) must be guaranteed. Because of precedence constraints of correlated tasks between federates, it is hard to provide predictable response for all tasks, and it is also diff...
Abstract: Sneak circuit analysis is an important reliability analysis step in circuit design. With the scale enlargement of the circuit system, analyzing the circuit integrally increased the analysis time as well as the space occupied by the analysis process. While using sneak circuit analysis in complex circ...
Abstract: A kind of multi-missile distributed cooperative guidance and control method for coordinated attacking maneuvering target in three-dimensional space was proposed based on the principle of network synchronization. A kind of suitable three-dimensional position synchronization algorithm was designed. Th...
Abstract: In order to solve the regression problems of nonlinear data and nonlinear function, the support vector machine (SVM) sequential minimal optimization (SMO) algorithm was adopted. The original SMO algorithm has deficiencies such as low training speed and instability training results. To accelerate the...
Abstract: Considering relatively higher requests of complexity of decoding algorithms due to the demand of higher decoding speed in some telecommunication systems, a multistage decoding algorithm was given based on the multilevel structure of block coding modulation (BCM). Each stage of the algorithm refers t...
Abstract: How the tool wear and milling parameters influence the work hardening in the process of face milling TB6 was studied to figure out the principles of work hardening. The results show that among the parameters selected in the experiments, the work hardening degree ranges from 107% to 112% and the dept...
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