Abstract: To overcome the shortcoming of the original dual-Euler method, i.e., it presumes that the range of pitching angle was limited to and it can-t be used for continuous solution of super-maneuvering flight when the pitching angle was beyond this limited range, improvement was made to solve Eulerian angl...
Abstract: A fast alignment and calibration method of inertial navigation system (INS) were approached from a control theory point of view. Using the Lyapunov transformation was proposed for transforming the conventional strapdown inertial navigation system(SlNS)error model. And the equivalence of SINS and gim...
Abstract: Rationality of the fatigue life evaluated method for civil aircraft structures under corrosive environment was validated by test for the chordwise joint parts of wings which were typical fatigue critical parts of civil aircraft structures. And the fatigue life of this part under corrosion was evalua...
Abstract: The design and application of severed damping-ring to rotor/stator components are effective in protecting labyrinth air seals and the cylindrical walls of annular chambers against flexural vibration and fatigue failures excited by various disturbing forces. The dynamic analysis of contact system was...
Abstract: In order to analyze the accumulation process of CO2 expired by crew in pressure cabin without proper ventilation and to evaluate the possible medical hazards, a computational fluid dynamics (CFD)model of crew staying in a given space station quarter was built to simulate the unsteady process of resp...
Abstract: With piezoelectric actuators as control elements, the basic equations of shape control for adaptive truss was formulated. A mathematical model of optimal actuator placements was presented, in which the actuator locations and the control voltages were taken as design variables, and the weighted prese...
Abstract: Testing and determining the pivotal parameters such as ultimate strength and thermal stress at the complicated condition of transients heating is very important to the reliability estimate, life prediction of aerospace materials and security design of the high-speed flight vehicle. Because there are...
Abstract: According to the dynamic state characters of the environmental simulation chamber, a lumped parameter model of temperature and a mathematical model of control system is established to accurately control the temperature of the environmental chamber to measure up to GJB, raise temperature rate and pro...
Abstract: Based on fuzzy variable structure control, a new guidance law of gravity-turn landing has been developed for the terminal descent phase of lunar soft landing. The sub-optimal sliding surface and fuzzy controller were designed to drive sliding variable converging to zero that would make a soft landin...
Abstract: Motion equations of relative attitude between the target and chase spacecraft were elaborated for the final approach phase of spacecraft rendezvous and docking. Two algorithms of extended Kalman filtering based on vision observations were used to estimate relative attitude, one is through attitude e...
Abstract: The thermal characteristic of fiber optic gyro(FOG) is one of difficult questions, it is a efficient method to improve the thermal characteristic of FOG by modeling. The characteristic of thermal affect induced nonreciprocity of optic loop was introduced , and it is one of the main reasons that affe...
Abstract: To solve the problem of low precision characters and non-Gaussian distribution noise of the micro-satellite attitude determination system, UPF(Unscented particle filter) was proposed. Based on the different characters between the UKF(Unscented Kalman filter) and PF(particle filter), UPF uses the UKF...
Abstract: A new fast and robust edge-matching algorithm guided by matched corners was presented. In the whole matching process, the corner constraint and the edge constraint were proposed to guarantee the matching speed. First, the matched corners were used to guide the edge matching. How to use the previous ...
Abstract: Refer to two key stages in template matching between two overlapping images: template selection and iterative matching, an one-dimension angle-oriented projection template matching method was proposed. The matching process firstly evolved a template selection discipline based on gray level differenc...
Abstract: Smart cards are secure, compact and intelligent data carriers, which can offers strong authentication and guaranteed non- repudiation. With the traditional authentication solution, the static password is rarely altered and maintained in the verifier table on the server. This is bringing forth the im...
Abstract: To mitigate PCB(printed circuit board) power/ground impedance, which is a great negative influential factor to signal and power integrity of high-speed multilayer PCB , the relation functions among PCB power/ground resonant impedance,resonant frequency, resonant quality factor and the electromagneti...
Abstract: Control allocation method was investigated with the background of aircraft with multiple control effectors. A new optimal control allocation method, bases sequence control allocation, was put forward. The optimal objectives were divided into control objective and mission objective, and the control o...
Abstract: Yang and Shieh have proposed a timestamp-based password authentication scheme using smart card. The weakness of Yang and Shieh-s scheme is submitting password in plaintext and not authenticating key information center(KIC)by user. The new scheme improved the process of registration, login, authentic...
Abstract: A fast and accurate estimation technique of initial phase of single-tone signal based on the phase of discrete Fourier transforms (DFT) spectrum was proposed. The initial phase is obtained by removing the frequency item in the multinomial using the DFT coefficient which is from two discrete sinusoid...
Abstract: Modeling and simulation for a complex software prototyping system were computer supported cooperative work process. To effectively manage its business process and data and thus improve the efficiency of the whole system-s work, a workflow-based project management system was proposed. It was comprise...
Abstract: A new model of weighted association rule was presented in order to solve the problem that data item have not the same importance in datasets. Based on this model, a new algorithm of mining weighted association rules with multiple minimum supports was proposed. The algorithm allows the user to specif...
Abstract: Aiming at improving the interpolation efficiency without lowering the path accuracy, the velocity look-ahead control in CNC(computerized numerical control) was introduced. Firstly, the interpolation geometry elements linking vector angle model, which was separated into line-connect condition and cir...
Abstract: The cruciform biaxial tensile test is an effective and practical method to realize the process of complex strain paths for the investigation of subsequent yield behavior and forming limit of sheet metal, and the key questions should be solved including the large deformation, homogeneousness of stres...
Abstract: Electronically controlled hydraulic power steering (ECHPS) improves driver-s ‘road feel’ because it has alterable assistance character. Steering gear model and bypass ECHPS model were built based on the hydraulic principle of the control valve and ECHPS. A simple formula suited the two models was us...
Abstract: The starting nano-TiO2 feedstock was agglomerated by spray-drying process. Nano-TiO2 coatings on transparent glasses were prepared by plasma spraying. The coating proceeded heat treatment at 300℃,400℃ and 500℃ respectively. The phase structure and the morphology of the TiO2 coatings were character...
Abstract: The method of rapid architecture selection and concept design was further discussed. The elementary models of satellite constellation′s architecture selection and concept design combined with concept design process were introduced. Risk and uncertainty analysis were integrated into the models. The i...
Abstract: Acquiring the motion information of human hands is a very important research problem in the master-slave grasping system for dexterous hands. Used to be the human-computer interface for the master-slave manipulation system for dexterous hands, a binocular stereo computer vision system was investigat...
Abstract: CBR(case-based reasoning) is a problem solving technique of using previous experience and cases to find a solution to new problems, which is suitable for those areas of experience-rich. CBR methodology was applied to the fault diagnosis and maintenance decision support of aircraft due to the abundan...
Abstract: To solve the risk measurement of product development with iterations, a modeling method to evaluate the risk of schedule and cost in product development was constructed, and a simulation algorithm was given to analysis the risk of product development process. The model was constructed by two stages,...
Founded: 1956 (
monthly
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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