Abstract: With the increasing requirements of velocity and accuracy, the elasticity has been a non-ignorable factor in the dynamic analysis and design of missiles, which could evidently influence the flight performance and control accuracy. In this case, considering the elastic vibration of missiles would imp...
Abstract: Face gear drives become the main direction of research for aeronautical drives because of their special advantages. The equation of face gear tooth surface was established based on the face gear transmission theory. For improving the precision machining technology of face gear, the method of face ge...
Abstract: When the engine slam accelerates or suddenly fails, the pressure wave formed by cavity effect and pipe fluid inertia in a short time will have negative impact on some components of air system. On the basis of the simulation program of the modular transient air system, the pressure variation of cavit...
Abstract: We developed a 3-PCR parallel-chain type of seed implantation robot for prostate tumors, based on measurement workspace in the perineum of prostate and quantitative analysis of the surgery procedure. For this kind of symmetry less degrees of freedom of parallel-chain mechanisms as position adjustmen...
Abstract: Taking into account both the autopilot dynamics and impact angle constraint,a novel chattering-free sliding mode control guidance law for homing missile to intercept a target performing evasive maneuvers was proposed. Firstly, we establish the guidance system state equation by differentiating the li...
Abstract: Due to the aviation accident caused by structure deformation occurring frequently, the health monitoring of aircraft's structure has become one of the effective means of prevention. Carbon nanotubes thin film can be used as strain sensor for health monitoring of structure damage. The dispersion tech...
Abstract: This paper focuses on the objective discrimination and prediction of mental workload of the aircraft flight deck display interface. By three physiological measurement methods of event-related potentials (ERP), electrocardiograph (ECG) and electro-oculogram (EOG), as well as subjective evaluation and...
Abstract: Taking account of the attitude motion of tethered system, mission satellite and abandoned satellite, dynamics and control models of tethered system are established. According to the flight process under a constant thrust in the tangential direction, an attitude control of mission satellite is adopte...
Abstract: To overcome the problem of the precision of gimbal angular speed control brought by the coupling torque between inner and outer gimbal of double gimbal magnetically suspended control moment gyroscope (DGMSCMG) and the nonlinear transmission characteristics of the transmission gear, a nonlinear robus...
Abstract: With the development of mobile communication, there are many different kinds of wireless networks, such as the internet of things, vehicular networks, and body networks. These mobile networks need the reliable seamless roaming among a multitude of access network technologies. Any single communicatio...
Abstract: An output-feedback sliding mode control method is proposed for a class of multi-input multi-output (MIMO) affine nonlinear extremum seeking systems. Firstly, the original MIMO affine nonlinear extremum seeking system is decomposed into several single-input single-output (SISO) extremum seeking subsy...
Abstract: Quality of service and the services providing ability of system are deeply influenced by unfairness of client contributions, a alliance algorithm based on distance-convergence was proposed by implementing the converging feedback network in dynamic traffic condition, and it can avoid the unreasonable...
Abstract: In order to meet the requirements of communication of unmanned aerial vehicle (UAV) over a long distance, the ground directional antenna automatic tracking system has been developed with the UAV location information to guide. With the real-time acquisition directional antenna vehicle position, veloc...
Abstract: For the problems of pipeline structures environment test in current aerospace, first of all, we researched the analytical method for dynamical strength characteristic of pipeline structures under preload and multiaxial random vibration experiments, and then made clear the difference and processing b...
Abstract: In order to study the effect of impact energy and structural geometry on damage resistance of stiffened composite panels under low-velocity impact, 3 groups of I-section stringer-stiffened composite panels were experimentally and numerically investigated. Drop weight low-velocity impact tests were c...
Abstract: With the foundation of inter-frame translation motion of the videos captured in outdoor video monitoring, a real-time video stabilization method was presented with equilibrium position modification and adaptive update of storage frames, which can realize the full-resolution video stabilization. Firs...
Abstract: In order to analysis the performance of the compound helicopter, a performance calculation model consisting of all the aerodynamics mathematical model parts is established. Based on the calculation model, using various flight conditions, we constructed the compound helicopter transition flight borde...
Abstract: With the development of integrative combat, the task will be converted into target following mode when unmanned aerial vehicle (UAV) finishes searching ground moving target. Complex combat environment is considered, and the problem of UAV following moving target in the condition of multi-threats sou...
Abstract: Radar micro-Doppler of human motion can provide signatures for target recognition. It is very difficult to extract motion parameters from radar echo of walking human because of its complexity. An estimation method of single walking human's bulk velocity, gait cycle and cycle length is proposed to re...
Abstract: In order to simultaneously estimate various variance-based sensitivity indices, a method is proposed by combining space-partition idea and unscented transformation (UT) method, which can estimate variance-based global sensitivity index (Sobol index), variance-based regional sensitivity index and var...
Abstract: To achieve high precision and high resolution numerical result of Euler equations, the basic principle of discontinuous Galerkin method, the simple WENO limiter on triangular meshes and shock capturing method based on adaptive mesh refinement were introduced. The simple WENO limiter-discontinuous Ga...
Abstract: Several potential failure modes may occur when tracked vehicle torque axis fail, and therefore it is necessary to take each failure mode into account as reliability sensitivity estimation is performed. A reliability sensitivity analysis method for mechanical components with multiple failure modes is...
Abstract: Trans-media moving object was equipped with outstanding advantages in multiple fluid media environment. However, its moving characteristics were hard to predict because of the free surface problem and complex stress. Added mass method was common to solve fluid-structure coupling problems in engineer...
Abstract: The space environment data is known to be nonlinear and non-stationary and often contains missing values, which brings great challenge to the model-building procedures, predictions and posterior analysis. To fill the data gaps, a new gap filling method based on the iterative singular spectrum analys...
Abstract: The accurate measurement of the dominant frequency of wing-tip vortex core oscillation is essential for controlling the wing-tip vortex. In the present study, the instability of wing-tip vortex, which is generated from an elliptical wing, was investigated under low Reynolds number via flow visualiza...
Abstract: Aiming at the problem that by the traditional method, it is difficult to get the global optimal diagnostic strategy of the complicated test system in fault detection for ignoring the uncertainty factors in the test execution and lacking of the long cycle optimization mechanism, a new diagnostic stra...
Abstract: When statistically modeling a stealth aircraft, conventional methods estimate characteristic parameters via calculating the statistics of radar cross section (RCS) directly, which may lead to relatively large fitting errors. Therefore,we introduce the Bayesian-Markov chain Monte Carlo (Bayesian-MCMC...
Abstract: The classic statistical methods based on statistical theory can not solve the estimation of poor information data. A novel method based on grey bootstrap model for space manipulator random vibration signals with poor information was presented. The random vibration measurement data was processed by 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