Abstract: Activity-based cost (ABC) was used to replace conventional volume-based product-costing system in addressing cost calculation and optimization issues in the aircraft manufacturing industry. Activity-based management (ABM) was applied to further implement cost control and optimization based on the ac...
Abstract: With the development of computer-related technology, people can continuously obtain data faster and faster. Facing with the massive and continuously updated data sets, incremental algorithm was introduced to the popular multiple linear regression analysis. The incremental algorithm of least squares ...
Abstract: The dissimilar redundant actuator system (DRAS) which consists of power-by-wire actuators, EHA (electro-hydrostatic actuator) and EMA (electro-mechanical actuator), addresses the problem of the distribution of central hydraulic source and pipelines. It also resolves the common fault, which indicates...
Abstract: Through-silicon-via (TSV) plays a key role in chip's vertical interconnection in 3D electronic package, so its reliability shows great importance. As the current density through TSV increasing, current induced stress has larger and larger influence on the TSV's reliability. The methodology for evalu...
Abstract: A universal Turbo-codes decoder was designed, which not only covers the parameters suggested by consultative committee for space data systems (CCSDS), but also supports other frame length (an integral multiple of 255bit) within 16384bit. Standard and non-standard frame lengths, as comparisons, were ...
Abstract: For the distribution analysis of space debris in the low earth orbit, a new statistical modeling method for space debris was proposed based on the debris resident time in the space grid. Polynomial fitting and extraction techniques for debris resident time statistic were introduced to obtain the bas...
Abstract: The usability of the partial least squares method of small sample theory in military aero engine development costs estimating was discussed. The technical and development expense data of more than ten kinds of military turbojet and turbofan engine were collected. The technical parameters such as tur...
Abstract: The slot-less tubular permanent magnet linear motor was selected as a linear actuator using for the attitude control of aircraft. The winding distribution factor of the annular slot-less winding was researched. The model of the winding factor distributing along the axis that considered the influence...
Abstract: With the consideration of characteristics of high voltage and high power output of 150kV/30kW power supply of electron beam welding (EBW), low-voltage circuit was designed to be composed of insulated gate bipolar transistor (IGBT) isolated DC power supply and full bridge inverter in series, and high...
Abstract: The elastic and plastic deformation distribution of skin and stiffener were analyzed during press bending for integrally reinforced panel with inside ribs. According to the characteristics of plastic deformation on inside stiffener and mainly elastic deformation on skin, a geometrical equivalent met...
Abstract: The sensor placement method of flywheel and cost estimation criteria were proposed. The relationship between the function modular and the fault types of the flywheel system was analyzed in order to build the qualitative fault transmit model. The transmit model of the flywheel based on directed graph...
Abstract: Antenna beam in sliding spotlight spaceborne synthetic aperture radar (SAR) cannot continuously scan the illuminated scene, leading to paired-echo in SAR images. A method quantitatively analyzing the impact of antenna beam granularity was presented. Firstly, mathematical mode of sliding spotlight sp...
Abstract: Accelerated testing methodology (ATM) predicts long-term strength in low temperature with short-term in high temperature, which is based on the viscoelasticity of matrix and the time-temperature superposition principle (TTSP). The strain invariant failure theory (SIFT) was modified by using micro ma...
Abstract: In view of the problem of driving method for the spherical motion mechanism, a new type of hydraulic drive spherical joint with two degrees of freedom was proposed. The joint mechanism used a full cycle rotating motor and a rudder blade swing motor as drive, adopted a measuring system of slide suppo...
Abstract: In consideration of actuator input constraints, a novel attitude control method driven by sliding-mode disturbance observer was presented for supersonic vehicle which is fast time-varying, strong coupling combining with parameter non-deterministic. Firstly, via introducing the concept of second-orde...
Abstract: Choosing symmetric stencils, a centered nonoscillatory scheme of third order scheme (Cn3) constructs a formula which achieves third-order accuracy. A modification of the original estimates, in the reconstruction procedure, was undertaken by employing a monotonicity region as well as an accuracy one....
Abstract: According to technique requirements of on-orbit autonomous intelligent management and control for spacecrafts, especially for satellite systems, an on-orbit real-time health assessment method for satellite attitude control systems was proposed based on a multi-level fuzzy comprehensive evaluation fr...
Abstract: A gross error detection and correction method of the public reference point in an aircraft assembly coordinate system was proposed for such deviations of a public reference point in a digitalized aircraft assembly system as resulted from foundation sinking of a workshop or other factors. In this met...
Abstract: An adaptive dynamic surface control scheme based on invariant manifold was proposed for the longitudinal motion control problem of hypersonic vehicle. With reasonable hypothesis, the longitudinal dynamic model was separated into flight-path angle loop and velocity loop. Flight-path angle loop was fo...
Abstract: Moments and functions of moment are widely used in image processing and pattern recognition due to their strong ability to represent features of an image. However, the researches on Gaussian-Hermite moments with which own orthogonal properties are still relatively less currently. Gaussian-Hermite mo...
Abstract: To resolve the problem of fast estimating two-dimensional direction of arrival (DOA) in coherent signals environment with two parallel linear arrays, a new method for single-snapshot two-dimensional DOA estimation was presented based on noncircular signals. New coordinate system was established and ...
Abstract: With the consideration of relative motion between payload and canopy, longitudinal dynamic of parafoil was simulated. Canopy and suspension line were regarded as a 3-DOF rigid body. Adding another degree of freedom of swing payload, a 4-DOF longitudinal dynamic model was proposed. Dynamic response w...
Abstract: Considering the lack of concrete hazard analysis tool for implementing hazard analysis during the preliminary design stage, a hazard analysis technique based on hazard factors was proposed. In this hazard analysis technique, hazard elements were identified, components of a system were classified, an...
Abstract: The given electromechanical coupled kinetic equations of the plate with piezoelectric network were solved by decomposing the responses into linear combination of sub-modal piezoelectric systems' responses. Through the research of the response behaviors of sub-modal piezoelectric systems when the cou...
Abstract: Determination of the stress intensity factor (SIF) of surface cracked geometry with clamped ends is necessary for crack growth analysis in laboratory. Based on the feature of the clamped ends, the clamped condition was simplified as a combined uniform tension stress and bending moment act with the r...
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