Showing papers in "Chinese Journal of Aeronautics in 2009"

TL;DR: The progresses of the research work on the design of flight control system at Nanjing University of Aeronautics and Astronautics (NUAA) are presented, which evidenced the credibility of the aircraft design and the effectiveness of theFlight control system for the tilt rotor working in the helicopter mode.

TL;DR: Numerical results show that the reliability method based on the LSSVR has excellent accuracy and smaller computational cost than the reliabilitymethod based on support vector machine (SVM).

TL;DR: In this paper, a new structure of electro-hydrostatic actuator (EHA) associated with a power regulator is proposed, which is composed of a high-pressure accumulator and a proportional valve.

TL;DR: In this article, a new type of electrode for micro-electro-discharge machining (micro-EDM), which can produce ultra fine micro components from various kinds of materials including those that cannot be processed by the silicon or the Lithographie Galvanoformung Abformung (LIGA) processings, is proposed.

TL;DR: In this article, an optimization strategy is proposed to deal with the aerodynamic/stealthy/structural multidisciplinary design optimization (MDO) issue of unmanned combat air vehicle (UCAV).

TL;DR: The experimental results have verified the stability and damage functions of the PXI-ISS, a compact and portable structural health monitoring technology developed for practical applications of SHM, which can scan large numbers of actuator-sensor channels and perform damage assessing automatically.

TL;DR: In this paper, an infrared signature model for solving the complex geometry and structure of a fighter is proposed with the reverse Monte Carlo (RMC) method, based on which the aircraft components that emit the most IR can be identified; and the cooling effects of the main aircraft components on IR intensity are investigated.

TL;DR: In this paper, the effects of adding boron to Nb-Ti-Si-based alloys were analyzed for their microstructure and oxidation resistance, and it was shown that the effect of the addition of borons on their as-melted microstructures and resistance to oxidization was significant.

TL;DR: In this paper, a direct method to optimize minimum-time low-thrust many-revolution Earth-orbit transfers with 10−5-order thrust-to-weight ratios is proposed.

TL;DR: A novel method to fuse infrared and visible light images based on region segmentation, which exhibits good infrared target features as well as clear visible background and its advantages over the conventional approaches is proposed.

TL;DR: In this article, a first-order, state-space model is developed by combining a geometrically exact, nonlinear anisotropic beam model with nonlinear ONERA (Edlin) dynamic stall model.

TL;DR: In this article, the authors studied the modeling of flight systems in large flying transport planes with cargo moving in it, and analyzed the effects of moving process parameters including cargo mass and moving items upon the flight.

TL;DR: In this article, the effects of the CeCl3 concentrations in conversion solutions with and without addition of NaCl, pH-values of conversion solution, drying temperature, time and temperature of immersion on the Ce-conversion coatings for corrosion protection of the SiCp/5A06 Al-MMC and 5A06 Alloy in the 3.5% NaCl aqueous solution at room temperature.

TL;DR: In this article, the effects of adding Nb on the mechanical properties as well as the transformation behavior of NiTiNb shape memory alloys, Ni 47 Ti 44 Nb 9 and Ni 49.8 Ti 45.2 Nb 5 alloys with different microstructures but with similar martensitic transformation start temperature, are prepared.

TL;DR: In this paper, a multi-objective and multi-variable goal programming algorithm was proposed to guarantee the stable mode transition in tandem turbo-ramjet engines, and the results show that with the maximum residua of only 0.06%, this algorithm has an acceptable convergence that meets the predetermined goals.

TL;DR: In this paper, a dynamic model of carrier-based aircraft landing gears on a dynamic deck is proposed to solve the complex simulation problem of force-on-wheel which comes from the dynamic deck.

TL;DR: In this article, X-ray diffration, scanning electron microscope (SEM) and energy dispersive spectrometry (EDS) analyses were conducted on 6061 Al-alloys in a weak alkaline electrolyte containing NaOH, Na 2 SiO 3 and NaCl.

TL;DR: In this paper, a mathematical model of helical end-milling forces through experimental identification of the cutting coefficients and analyzes the changes of corner milling forces under different conditions is presented.

TL;DR: In this paper, a flexible-joint-manipulator with three means to make its mechanical arm come into compliant contact with the objects with a force kept within an acceptable range is presented.

TL;DR: In this article, an on-line diagnostic algorithm is put forward, which uses a tracking filter to estimate the engine's health condition over its lifetime, can be reconstructed an onboard model, which is then made to match a real aircraft gas turbine engine.

TL;DR: Tension and shear tests are carried out on composite cross-joints, produced by resin transfer molding (RTM), stitch-RTM and cobonding techniques separately, to investigate the influences of different production methods on their mechanical properties and their failure mechanism as discussed by the authors.

TL;DR: In this article, the effects of Nb-atom solid solution in NiTi phase on the yield strength induced by self-accommodation of martensite variants were investigated by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), differential scanning calorimetry (DSC), and tensile tests.

TL;DR: In this article, the tighten couplings of game strategies with adjoint methods for multi-criterion aerodynamic design optimization are addressed, and the numerical implementation is also described in details.

TL;DR: In this paper, the improved line sampling (LS) technique is employed to analyze the probabilistic characteristics and reliability sensitivity of flutter with random structural parameter in transonic flow.

TL;DR: In this article, an inner loop system for velocity and attitude tracking control is designed by using the exponentially approaching rule of the variable structure theory and integrated with the outer loop flight altitude control.

TL;DR: In this article, a conjugate calculation methodology is used to simulate the C3X gas turbine vanes cooled with leading edge films of "shower-head" type.

TL;DR: A knowledge fusion approach is put forward, which fuses online human knowledge, prior knowledge, and computational knowledge by using evolutionary computation to fully explore the advantages of human and computers.

TL;DR: In this paper, a 3D microburst model with wind shear effects is considered and a general method to modify the aerodynamic model is proposed for real-time flight simulation in a flight simulator.

TL;DR: In this article, the authors proposed a new celestial analytic positioning method by stellar horizon atmospheric refraction for high-altitude flight vehicles, such as spacecraft, airplanes and ballistic missiles.

TL;DR: In this article, the effects of active jet-flow injected from the blade tip platform upon the tip clearance flow were numerically investigated in turbine designs, and the results showed that the mass rate of the third jet flow turn to be the optimum in maximizing the turbine efficiency.