Abstract: 2-DOF (degree of freedom) gimbal mounted on floating space platform caused attitude disturbance to the platform while pointing and tracking a space object. Therefore the attitude of platform was affected then the pointing direction of the end of the gimbal changed and the pointing accuracy was reduc...
Abstract: Based on a hybrid algorithm combining genetic algorithm (GA) with improved Gauss method (IGM), a design method of space interception orbit was proposed for solving time-fuel-optimal trajectory planning problem of interceptor. First, classical Gauss method was improved by applying Newton-Raphson iter...
Abstract: The micro-crack detection experiments of the certain model aircraft engine turbine blades were carried out. Based on eddy current testing technology, a small differential excitation probe with high sensitivity and difference from traditional probes was designed and developed. The simulation analysis...
Abstract: A simple and efficient novel network coding scheme was proposed to improve the throughput and transmission reliability of multi-user multi-way relay network with full-data exchange. It was based on a multi-stage two-way network coding scheme. Two paired users transmitted their information symbols to...
Abstract: When the load of the industrial robot end-effector is changed in practical use, mechanical vibration occurs, in order to get high motion performance of the industrial robot, the end-effector load should be identified to modify the control parameter. A method of identifying load by servo motor output...
Abstract: Parametric product family progressive optimization design approach is proposed based on product platform technique. The progressive optimization design process was constructed, the optimization of product family was carried out progressively using multi-objective mix-evolution algorithm. The mix-evo...
Abstract: To improve aerodynamic performance of flying wing from design reality, aerodynamic design and analysis of high-aspect-ratio flying wing unmanned aerial vehicle (UAV) were conducted. In design and analysis process, according to features of flying wing, aerodynamic design criteria have been proposed. ...
Abstract: In order to improve the system capacity of cooperative grouped satellites, we considered the transmission mode of equipping the satellites with antenna arrays. Channel condition of downlink with maximum channel capacity was analyzed. Implementation approaches to the maximum channel capacity were put...
Abstract: A coupled free-wake/panel method to predict the rotor downwash aerodynamic interaction and helicopter trims is presented. Based on lifting-surface theory, free-wake method was developed to analyze aerodynamics interference of rotor wake. A three dimensional panel model was applied to represent the f...
Abstract: Considering the additional constraints induced by rub-impact, a mechanical model was proposed for typical mechanical characteristic of rub-impact. Based on the constraint model, some characteristics in response such as resonant interval extending, amplitude jumping and contact instability were analy...
Abstract: The computing of uncut chip thickness is the basis for further studying the cutting mechanism as well as simulating the cutting process. The research about orthogonal turn-milling operation with inserted cutters was focused on. By simplifying the trajectory of cutting edge, the uniform formulation t...
Abstract: The strapdown inertial navigation system (SINS) need to be installed on a servo platform and rotated through 90 ° or 180 ° about the up axis for traditional multi-position analytic alignment method. Thus it will bring inconvenience, and the precision of the servo platform will directly affect the pr...
Abstract: To solve the fault diagnosis problem of civil aircraft systems by utilizing quick access record(QAR) data, with the civil aircraft bleed air system as the research object, we proposed a fault detection method of multiple linear regression model for multi-flight cycle data characteristics. Firstly, t...
Abstract: To reduce the time of finite element (FE) modeling for a delta wing as well as improve the efficiency of structural analysis, design and optimization, a method, with the only input of its geometry profile meeting the pre-defined aerodynamic performance, for parametric modeling based on the self-defi...
Abstract: A hybrid-and-forward cooperative system based on the joint layered decoding of quasi-cycle low-density parity-check (QC-LDPC) codes was designed to improve the overall performance of the relay cooperative system. The construction method of the QC-LDPC systematic codes used between source node and re...
Abstract: The waveform of lightning protection pin injection test for airborne equipment is a combination wave in which the open circuit voltage waveform is the same as short circuit current waveform. For such class of combination wave, a novel combination wave generator circuit was proposed based on the line...
Abstract: Fatigue damage of 7050-T7451 aluminum alloy plate with scratch was studied, and the fatigue life of aluminum alloy plate after scratching was predicted considering the common effects of the residual stress, plastic damage and fatigue load. The nonlinear dynamic finite element (FE) analysis was condu...
Abstract: Understanding mechanism of wave propagation in elastic media with cracks is the key scientific issue in exploration and extraction of shale and other unconventional oil and gas resources. Based on the advantages of the numerical simulation, the excitation and propagation of elastic wave in the crack...
Abstract: To solve the dimensional optimization design problem of manipulator, the numerical index of dexterity was presented by pose probability coefficient, which was defined as the ratio between possibly sampled orientations and sampled orientations of the working point. According to the pose probability c...
Abstract: The final convergence state of multi-agent under ordinary consensus control is restricted by communication topology structure and edge weight. Different convergence states further influence the convergence speed of multi-agent. To attain identical convergence state under different communication topo...
Abstract: At energies around Coulomb barrier the study of the dynamic effect of weakly bound nuclei is one of presently hot subjects. However, due to the experimental studies about this field are scarce, especially on the medium-mass target nuclei. It has no systematic conclusion. Therefore, this study needs ...
Abstract: Low-cost curing is a challenging task for composite manufacturing, especially for large-scale part. Vacuum assisted resin infusion (VARI) molding process was employed to fabricate carbon fiber/epoxy composite laminate. A curing method using flexible electric heating film (FEHF) was developed. The ef...
Abstract: A time-varying autoregressive model with time-varying coefficients was investigated to identify linear system parameters from nonstationary time series. The basis function of multi-scale radial basis function (MRBF) was employed, and the identification of nonstationary modeling problem was then simp...
Abstract: The actuator rate is one of the important constraints in designing flight control system. When the actuator rate is saturated, the disturbed aircraft or the aircraft under control may go into pilot induced oscillation (PIO) resulting in lowering the flying quality. The design method of limiting the ...
Abstract: The flying qualities evaluation of high angle of modern attack aircraft lacks of quantitative evaluation criteria. Based on the conventional flying qualities criteria, with mission-oriented flying qualities evaluation method, various flying by wire systems with different transfer function parameters...
Abstract: Poly (vinylidene fluoride) (PVDF) films with electroactive phases were prepared by simple feasible solution crystallization method. The influences of various precursor solution concentrations, different stirring times and hot pressing process on the formation of electroactive crystal phase structure...
Abstract: For the question that the standard trajectory guidance was too sensitive to initial value of state and robustness was worse, a new standard trajectory guidance method based on the fuzzy sliding mode control was proposed. The robustness of sliding mode control was used to improve the adaptive capacit...
Abstract: In order to study the feasibility of the thrust vectoring using magnetohydrodynamic(MHD) control weakly ionized plasmas at low temperature, the experimental method based on the MHD control plasma flow theory was put forward. We established a MHD flow control experiment platform of seeds (alkali meta...
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