Abstract: Based on the analysis of the high-altitude balloon thermodynamic environment, a coupling dynamic model was established to describe its thermodynamics and kinetics. The model was used to simulate the ascending and floating processes of a high altitude balloon. The results show that the inner helium t...
Abstract: For satellite attitude control system fault diagnosis, step type and slow drift type output bias of actor and sensor were considered as parameter bias fault. Fault detection and diagnostics of parameter bias(FDDPB) algorithm and its application on actor and sensor of satellite attitude control syste...
Abstract: Based on the characteristics of high speed, the movement was constrained by roads, and the vehicle networking topology changed frequently, a cooperative traffic safety alarming method based on epidemic model was presented, and the transmitting delay was analyzed with Markov chain. The method was tes...
Abstract: In order to determine the reasonable information flow intensity of the flight task, a simulation model of aircraft information display interface was developed, in which the correct response rate and reaction time of subjects were used to evaluate the task performance. According to the experiments an...
Abstract: To solve effect problem of spacecraft lifetime caused by on-orbit spacecraft plume effect, numerical simulation and experimental validation were used. Based on the experiment studies of DFH series satellite attitude control thruster nozzle plume, axial-symmetric nozzle model was established. Rectang...
Abstract: The non-linear distortion should be considered in aeronautics and astronautics communication applications due to high spectrum utilization and power efficiency. Numerous studies have been carried out on the non-linear distortion modeling and linearization of power amplifier. A design of nonlinear di...
Abstract: Target observability criteria previously established for bearing-only tracking in two dimensions was extended to that for bearing-rate-only tracking. For unobservability of Nth-order dynamics target from bearing-rate-only measurements, by an analysis of the relative movement equation of missile and ...
Abstract: Due to the deficiency of the maximum discharge principle with regard to the design of the minor geometry characteristics and small orifice water mist swirl injector, a numerical investigation on it was performed by simulating the inner flow field of two phase flow injector using the mixture model in...
Abstract: Three super resolution direction finding algorithms based on virtual element interpolation were studied. On the basis of mutually cohering the signals from multiple smaller arrays of different radars, three super resolution algorithms, namely, the nonlinear least squares (NLS) algorithm, the iterati...
Abstract: A three-dimensional infrared (IR) radiation code of the plume was developed by the finite volume method (FVM) coupled with narrow band model in non-gray absorbing-emitting media. The infrared radiation of the unforced plume and the forced plume, which is mixed by injecting high amplitude and low mas...
Abstract: Graphite-cement specimens were made by adding water reducing agent in cement, and the specimens- piezoresistivity in a destructive overload experiment was mensurated by a series connected AC circuit. The results present that, if a small amount of graphite was mixed in, the cement material-s uniaxial...
Abstract: For the feature that hypersonic vehicle motion model is highly nonlinear, multivariable coupled and includes uncertain parameters, a robust adaptive control strategy based on nonlinear dynamic inversion for the hypersonic vehicle was proposed. By decomposing the vehicle motion equations into two sub...
Abstract: Complexity of data mining algorithm over data stream is the most important and it should be more focused on algorithm efficiency because of the great consumption of algorithm resources. Fault-tolerant frequent pattern mining is more generalized and suitable for extracting interesting knowledge from ...
Abstract: The element model of the fiber coil with the quadrupole (QAD) winding pattern was built based on the discrete mathematics formulae of the Shupe error in the fiber optic gyroscope (FOG), and the comprehensive physical parameters of the fiber coil with multi-material composition were analyzed for the ...
Abstract: In order to solve the large embedded software testing problems,an automated regression testing method based on system snapshot was proposed. Taking unmanned aerial vehicle(UAV) flight control software as a case study, some key technology researching, system architecture designing and experiment anal...
Abstract: To facilitate alternating current (AC) load power performance research in aircraft electric power system, the AC load semi-physical simulation technology was proposed. The technology was based on pulse width modulation rectifier topology and three-phase current decoupling control. Complex compensati...
Abstract: Analytic hierarchy process (AHP) is widely applied to simulation systems credibility evaluation, but the traditional AHP can not solve the step problem of credibility evaluation result. In order to resolve this problem, the main cause of step problem was pointed out to be AHP relative weight-s fault...
Abstract: Detached eddy simulation was used to simulate decaying homogeneous isotropic turbulence. Simulation results were compared to the experimental data of Comte-Bellot and Corrsin, showing that the detached eddy simulation of homogeneous isotropic turbulence was acceptable. The method proposed by Rogallo...
Abstract: In order to carry out the unmanned airship system ground integration and flight simulation, the hardware and software of the hardware-in-the-loop(HIL) simulation platform was developed. It was based on real-time operating system(RTOS) VxWorks, Matlab/Simulink and real time workshop(RTW), FUTABA data...
Abstract: Based on the theory of one-dimensional unsteady flow, a distributed parameter model of gas transmitting in pipeline was given. Then the model was solved with upwind difference formula, numerical simulations of the transmission of pressure waves in the pipe were also performed. Comparing the result o...
Abstract: A direct numerical simulation (DNS) of two dimensional, conducting turbulent channel flow under the action of applied streamwise magnetic fields was performed based on the low magnetic Reynolds number approximation. The numerical results with Re=10 000 under the action of different magnetic interact...
Abstract: During water-exit of underwater vehicle, the violent change of flow field is very complex. In order to investigate the variation of hydrodynamic load, the water-exit of underwater vehicles was simulated by a viscous flow solver with homogeneous multiphase flow model and cavitaion model. The effect o...
Abstract: To meet the real-time monitoring and control requirements to unmanned aerial vehicle (UAV),a navigation electronic map module of ground control system (GCS) was designed under windows platform.This module working with displaying module, mission planning and operating module, and communication module...
The method of quality cost management for the development process of aerospace product was studied. The overall management model of quality cost was proposed, in which the three-layer organizational structure, product development process and the management strategy of quality cost were combined. Fur...
Abstract: Structural flexibility of large transport results unavoidable coupling between control system and structural dynamics due to the application of large amounts of light material. Control system design for such aircraft should consider contribution from structural flexibility, and satisfy the specifica...
Founded: 1956 (
monthly
)
Sponsor: Ministry of Industry and Information Technology of the People's Republic of China
Sponsored by: Beijing University of Aeronautics and Astronautics