Aircraft radio frequency (RF) cables are the main medium for transmitting signals. There are currently various non-standard interface cables, and in order to use standard interface instruments for performance testing, precise adapter leads are required. However, the precise adapter leads have high r...

To deal with the risk of reducing the capacity of passenger aircraft bellies due to the interruption of passenger aircraft routes in the context of COVID-19 pandemic, and to improve the robustness of the aviation logistics network at a minimum cost, a study on the allocation and route optimization o...

In order to quickly analyze the composition and risk of thermal runaway gas in lithium ion batteries, an analysis method based on laser Raman spectroscopy and the empirical formula is proposed. Using the independently designed gas detection platform of the lithium ion battery, the composition and ex...

Flight departure delay is a key and difficult problem that the civil aviation industry is unanimously concerned about. Aiming at the problem of unclear reasons for flight delays, the BLCNS-LV-IDA causality analysis framework is proposed. In the discipline of flight ground support business, causal an...

Aimed at the problems that the spatially regularized discriminative correlation filtering (SRDCF) algorithm with fixed regularization weight and model degradation, a correlation filtering tracking algorithm based on saliency awareness and consistency constraint was proposed. Firstly, the histogram o...

A discharge model of the divergent magnetic field ion thruster (Kaufman thruster) of 10 cm diameter is established with COMSOL multi-physical field coupling software to study the internal discharge process of the thruster and to provide reference for subsequent engineering improvement. The key disch...

The strong aerodynamic interaction between the nacelles and the wing-body at supersonic speed, and the effect of the exhaust plume on the mainstream shock wave structure could have a great influence on the sonic boom loudness. This paper carries out a numerical investigation on the effect of nacelle...

The ranking of suspected faults in the process of automatic software fault localization will be continuously created and is determined after the execution of existing test cases. Sometimes the program units corresponding to the fault are ranked lower in the ranking of suspected failures based on the...

Aviation, navigation, and other life safety areas can benefit from the integrity augmentation services offered by SBAS. In response to the deception risk of SBAS services and the development of the BeiDou satellite-based augmentation system (BDSBAS), this paper proposes a message authentication meth...

Aiming at the randomness and fuzziness features of hydroplaning behavior of aircraft tires, a new safety evaluation methodology of tire hydroplaning is established on the basis of normal cloud model. The variable weight theory is adopted in order to adjust the weight value dynamically. The penalty f...

Aircraft group support involves a wide range of elements, multiple strategies, and strong interaction. Its simulation analysis method is a hot and difficult point in conducting research on aircraft group support decision-making and evaluation. This paper first establishes the multi-agent function ty...

Because of the limitations of decomposition tools in traditional image fusion methods, artifacts, decreased brightness, and contrast appear on fused image edges. A gradient edge-preserving multi-level decomposition(GEMD)-based approach for infrared and visible image fusion, as well as an enhanced pu...

During the service period of the propellant tank, the accurate analysis of its crack defects and reliable state with crack defects can not only guarantee the safety of the launch site, but also effectively avoid unnecessary panic, providing a reference for emergency plan formulation. Based on interv...

A three-degree-of-freedom wind tunnel virtual flight test system was created in an effort to address the possible stability issues of three-axis kinematic coupling and high angle-of-attack instability presented by the hybrid wing-body aircraft. Based on the dynamic similarity model, longitudinal and...

The performance of the probe system is the key factor to determine the sensitivity and stability limit of the spin-exchange relaxation-free (SERF) atomic spin co-magnetometer for inertial measurement. In order to suppress the low-frequency random noise in SERF auto spin co-magnetometer, the error me...

The blowing action of the incoming flow may cause the functioning state of the rotating components to alter when they operate at high altitudes but low speeds. The compressor is in a special “mixer” or “turbine” working state at such a condition, which makes a discontinuous change of efficiency duri...

Freeplay nonlinearity widely exists in the structure of aircraft, which can bring limit cycle oscillations (LCO), leading to the fatigue failure of the structure. There is relatively little research on the mechanism and passive suppression of the nonlinear flutter for all-movable fins. Therefore, th...

In order to clarify the mechanism of the tip leakage flow in transonic turbines and further improve turbine efficiency, the effect of tip injection on the performance of a flat tip and a squealer tip is studied under the transonic condition, and the flow state in the clearance between a flat tip and...

To study the vibration characteristics of asphalt concrete pavement, the time domain model of road roughness was simulated by the white noise filtering method, the coupling effect of vehicle and road with different vehicle speeds and different road roughness levels was analyzed based on the quarter ...

A fault detection and estimation（FDA） method based on adaptive technology and observer is designed for common actuator faults of quadrotor unmanned aerial vehicle. In the stage of fault detection, the nonlinear diagnostic observer is designed, and the threshold value is derived by analytic function ...

Subretinal injection of human embryonic stem cells is an effective procedure for treating retinal degeneration, which imposes high demands on the precision, stability, and safety of the surgical procedure. To address these challenges, a robot-assisted retinal surgery system based on a master-slave c...

As the key process of aircraft design, top-level requirements should be carefully considered at the beginning of design activities. A quantitative trade-off method for top-level requirements of commercial aircraft has been proposed. According to the relationship between top-level requirements and ai...

Due to a number of limitations, traditional composite structure design approaches are unable to completely use the design space of composite. The realization of tow-steered composite brings new opportunities for improvement of the performance of composites. In this research, a tow-steered composite ...

In view of the sonic boom prediction for supersonic transport, this paper develops a numerical method for supersonic near-field based on a finite volume scheme and an adjoint-based Cartesian adaptive mesh refinement for the governing equations. By solving the adjoint equation on an embedded-boundary...

In this research, a multi-detection anti-occlusion target tracking method is suggested to address the issue of poor tracking effect when unmanned aerial vehicle (UAV) targets are occluded by obstacles during the target tracking process. A response confidence discrimination method is designed by fusi...

Scientific regional classification is fundamental for investigating aircraft CO₂ emissions with regional differences and spatial relativity, and for proposing differentiated CO₂ emission reduction measures. Using aircraft operation data from China’s some provinces over a ten-year time span (2007–201...

Code carrier divergence (CCD) monitor is one of the integrity monitors introduced by ground-based augmentation systems (GBAS), which is used to monitor the inconsistency between code pseudorange and carrier phase observations. Dual-frequency smoothing technology changes the test statistics and other...

As an important functional component of a satellite, a parabolic antenna is a basis for realizing remote sensing measurement and wireless communication. In order to solve the difficulty of configuration design and stiffness matching of modular parabolic antenna deployable mechanism, a configuration ...

With the increasing complexity of flow structure in engineering, detached eddy simulation (DES) has become one of the most effective methods for turbulence simulation. DES is a hybrid method, combining Reynolds averaged Navier-Stokes (RANS) and large eddy simulation (LES) and thus possessing the hig...

Object detection algorithms based on deep learning usually need to use post-processing methods such as non-maximum suppression to filter the prediction box, and can not balance the detection accuracy and recall rate of the model in the crowded pedestrian scene. Although the iterative detection meth...

Aiming at the problem that the tail-sitter UAV is sensitive to wind disturbance in the vertical take-off and landing (VTOL) stage, an attitude control law based on L₁-ITD is proposed. Firstly, a 6-DOF nonlinear model of a tail-sitter UAV in VTOL stage is established, and an L₁ adaptive attitude cont...

The interior of civil aircraft cockpit is relatively closed, the air circulation is not smooth, the personnel density is large, and there are organic heat sources such as personnel and electronic equipment. It is essential to have a firm grasp of the flight envelope’s CO₂ concentration, temperature ...

A remote sensing image mosaic is an important research content of remote sensing image interpretation. However, affected by the imaging time, angle, and object texture, mosaic images often suffer inconsistent colors and structure dislocation. Aiming at the above quality problems, a double-branch net...

Flat hypersonic aircraft are better suited to skid landing gear than wheeled landing gear because of its light weight and compact design. However, the inherent characteristic of the wheel skid layout causes the problem of heading instability during mid-speed taxiing. Aiming at the problem, a variabl...

A calculating approach based on the two-way analysis of computational fluid dynamics (CFD)/computational structure dynamics (CSD) coupling is devised to increase the predictability of the projectile’s tail-slap load. The main governing equation of fluid calculation adopts the Navier-Stokes equation ...