The present article attempts a more comprehensive review of recent literature in the broader area of mechanically fastened polymer-matrix composite joints with protruding-head bolts. The article begins with a review of the mechanical configurations of composite joints. A study of the mechanical conf...

The leading edge slat is an important lift increasing device in the take-off and landing stages of large aircraft. But affected by its own body stiffness and support stiffness, the slat is prone to warpage and deformation under aerodynamic load, resulting in gaps with the wing box, which affects the...

The temperature stability of optical system and detector of high precision stereo mapping camera affects the mapping accuracy of mapping camera. For transmission optical system, multi-stage external heat flow suppression technology is adopted to improve the temperature stability of the star camera l...

To carry out airport safety risk early warning under the circumstance of non-suspend air construction, a risk early warning model is constructed by integrating dynamic weight and matter-element extension analysis (DW-MEE). Through the analysis of historical accidents, literature, rules and regulatio...

In order to improve the feature expression ability of the Siamese network without deepening the network, a Siamese network tracking algorithm was propose based on high-level semantic embedding. First, a semantic embedding module was designed with convolution and up-sampling operations, which effecti...

Blended wing-body (BWB) aircraft can meet the economic, environmentally friendlyand low-carbon operation needs and is one of the key development directions of future civil aviation. Aiming at the flight control system of BWB aircraft, its safety analysis and system design are studied. First, a descr...

To improve the wet gas metering accuracy by using a vortex flowmeter, aiming at the problems of low prediction accuracy and narrow application scope of the traditional meter overreading correlations, a meter overreading model based on flow parameters of the entrained droplets (entrainment fraction a...

This paper analyzes the power measurement deviations of the direct and reflected signals from BDS GEO satellites. Firstly, the expressions of direct and reflected BDS GEO signals received by actual antennas in ground-based scenario are presented. Then, the relative deviations of direct and reflected...

A coaxial-rigid-rotor helicopter flight dynamics model, which can be coupled with unsteady ship airwake, was developed to investigate flight characteristics of the rotorcraft during deck landing. In the numerical simulation of ship flowfield, the detached eddy simulation method was used to obtain hi...

This paper proposes a three-dimensional integrated design method for missile guidance and control with fixed-time convergence to address the issues of impact angle constraints, state constraints, and control constraints. A three-channel fully coupled design model of guidance and control system with ...

The ellipse-based optical navigation technology has become a novel and precise autonomous navigation method. Therefore, how to fit the elliptic edge of the space object is the essential condition of the optical navigation method. We propose an ellipse detection algorithm for the spacecraft optical n...

To solve the problem of accuracy maintenance of low-cost MEMS-INS/GPS integrated navigation under the condition of insufficient observable GPS satellites, a MEMS-INS/GPS pseudo loosely-integrated navigation method is proposed based on grey model and adaptive Kalman filter. In the framework of the pr...

An LPV control scheme is proposed to design integrated flight control laws for unmanned helicopters. The LPV control law achieves explicit model following performance for an unmanned helicopter in velocity, sideslip angle, altitude, and yaw angle control channels, leading to desired flight path cont...

Erosion is a common occurrence in the civic, industrial, military, and other sectors, and it frequently results in equipment being struck by particles and suffering varied degrees of damage. This paper selects Q345 steel to carry out the erosion experiment under the liquid-solid two-phase flow condi...

In this paper, a deviation model dynamic surface control algorithm (DM-DSC) is designed for automatic wave-off control of carrier aircraft when the optimal wave-off trajectory is available. Firstly, the optimal wave-off trajectory is given based on Radau pseudospectral method. Furthermore, according...

In order to further improve the reliability and recognition accuracy of the solenoid valve fault diagnosis method based on current detection at the drive end, a research was conducted on the solenoid valve fault pattern recognition method. First, a method for extracting eigenvalues based on time-fre...

Buzz-saw noise generated by fan/compressor blade tips is one of the main noise sources in high bypass ratio Turbofan engine. To reduce the noise, the detached shock-wave system at the blade leading edge of a relative supersonic and subsonic axial two-dimensional cascade is studied. First, based on t...

Using Terahertz communication technology to achieve centimeter level inter-board/chip interconnection in avionics can reduce pins and connectors, electronic equipment volume, and maintenance costs. For the short-range Terahertz communication network with omni-directional antenna transceiver and on-o...

The part of an aero engine with the highest temperature is the turbine blade. The film material is prepared on the surface of the object to be measured to form a thermocouple sensor, which can timely and effectively measure the temperature of the turbine blade. The diffusion failure of the thermal o...

To characterize the dynamic combustion behavior of metal fuel in solid propellants, a simultaneous measurement method for the burning particle size and velocity based on light field imaging is proposed in this paper. A light field imaging system is established and the burning metal particles are ima...

Aiming at the problem of turbulence model selection for unsteady flow simulation in a long and narrow enclosed cabin, this study uses an aircraft cabin as a typical environment and uses the heat shrinkage ratio method based on similar criteria to build a simplified experimental platform. The experim...

For lack of research on degradation test (DT) for molecular sieve oxygen concentrator (MSOC) and clear account of the factors causing degradation failure of molecular sieve bed (MSB), a DT design method of MSOC based on orthogonal test was proposed. Based on the working principle of MSOC, the main f...

In view of the deficiency of the power supply mode for the electric slip ring of the stratospheric airship anemometer, a contactless power supply system of the airship anemometer based on DSP control is designed. Based on the principle of electromagnetic induction, the composition of contactless pow...

To solve the problems of lack of prior information and incomplete reliability of monitoring data in structural safety assessment of large liquid tanks (LLT), a structural safety assessment model of large liquid tanks considering environmental disturbance is proposed based on the belief rule base (BR...

For the problem of inadequate terrain adaptability caused by the fixed structure of traditional helicopter landing gears, a new landing gear integrated for buffering actuation and walking with two stage buffering system was designed. The buffering function under multiple conditions was realized, the...