One type of wings that may spin along a fixed axis is the rotating variant wing. It is frequently utilized in the domains of aviation bombs, cruise missiles, new concept unmanned aerial vehicles, and other aircraft. Its dynamics stability mechanism of opening and closing process is a key fundamental...

Most of the busiest airports airports face severe congestion and flight delays. Optimal allocating airport slots is one of the most effective ways in airport demand management. This paper systematically reviews the progress of research in airport slots allocation, as well as the main techniques in s...

In view of the low efficiency of low frequency torsional vibration tapping of titanium alloy, the ultrasonic longitudinal torsional and low frequency torsional compound vibration tapping method was proposed. To investigate the process effect of compound vibration tapping and the influence rule of pa...

The model-free predictive current control method for the toroidal motor with extended state observer (MFPCC-ESO) was investigated in order to reduce the dependence of deadbeat predictive current control (DPCC) on the parameters of a permanent magnet toroidal motor system. According to the composite ...

To address the insufficient shallow feature extraction of most existing algorithms, which results in noise, blurred vascular boundary and capillary under segmentation, a cross-level fusion gated adaptive network is proposed. Firstly, shallow feature information is fully extracted by the dense gated ...

Airport runway roughness is an important content of airport pavement evaluation. At present, the commonly used roughness evaluation methods can’t determine the distribution of unevenness on the runway, and can’t classify and evaluate the taxiing safety of different types of aircraft. In this paper, ...

One key component of active risk management is the prediction of aviation safety event risk levels.Considering the characteristics of high-dimensional complexity and class imbalance presented by massive aviation safety event data, this paper proposes an aviation safety event risk level prediction me...

To simulate the material and application characteristics of liquid-missile propellant tanks, fatigue tests were carried out after pre-corrosion in 30% HNO₃ for different hours. Effects of pre-corrosion on fatigue properties were investigated by scanning electron microscopy (SEM), transmission electr...

To address the imperfect and imprecise shortcomings of the knowledge-based Bayesian network (BN) construction method, this paper proposes a BN structure construction method based on knowledge guidance and data mining. Firstly, aiming at the problem of inaccurate fault diagnosis results of a single s...

For air cargo flights with multiple legs and multiple stops, it is necessary to reasonably control the center of gravity (CG) position of the aircraft , and maintain a balanced state during the flight; during the loading and unloading operation at intermediate airports, it is important to avoid extr...

With the opening of Beidou-3 navigation satellite system service, the relevant airworthiness standard of Beidou-2 cannot meet the requirements of the current application scenarios of airborne equipment, which seriously restricts the application process of Beidou in the field of civil aviation. It is...

Distant retrograde orbits (DRO) are well-known trajectory types in cislunar space, such orbits have long-term stability and low insertion cost. In cislunar space, DRO are well-known trajectory types with minimal insertion costs and long-term stability. A cislunar station deployed on DRO might be exp...

An air traffic network is a multi-dimensional complex system, which becomes vulnerable due to the coupling relationship when disturbed. This research examines the structural resilience of the system to mitigate the cascading failures caused by disturbance. An air traffic cyber physical system (CPS) ...

This paper proposes a precise landing control method based on model predictive control-linear quadratic gaussian (MPC-LQG) to address the influences of carrier motion and wake turbulence during the landing process of carrier-based aircraft. The method is applied to research precise landing control i...

Redundant electromechanical actuation systems are frequently utilized in flight control surface actuation systems as a result of advancements in more-electric/all-electric aircraft technology. However, a solution to the force fight brought on by actuator output asynchrony in active / active working ...

Oil film, as the intermediate medium, offers substantial benefits for enhancing the stability and dependability of mechanical transmission systems with high rotation speeds. The high-speed bearing-rotor system is inevitably affected by environmental factors in manufacturing and operation. These fact...

In order to improve the power supply quality of the remote regulated power supply and ensure that the output voltage of the transmitter device reaches the set value quickly and smoothly under the premise of high reliability, a design method of the remote regulated power supply in the flyback topolog...

Vertical light industrial building structures exhibit characteristics such as large spans, high-altitude loads, and uneven vertical mass distribution. In order to investigate the vibration response characteristics of this structural form, this paper takes a typical vertical light industrial producti...

During a lander landing, the plume-lunar surface interaction induces lunar dust ejection, which is the main reason for lunar dust hazards. The study adopts computational fluid dynamics(CFD) method to build a one-toone nozzle model and vacuum plume flow and diffusion model, through which the lunar du...

Complex constraints must be addressed in the aerodynamic optimizations. Distinct constraints not only influence the optimization outcomes but also significantly influence the optimization method's efficacy. This paper investigates the impact of reference points on optimization design results using t...

RP-3 jet fuel is one of the frequently utilized fuels in aviation engines. Temperature and soot volume fraction distribution of flame are the vital data support for fuel optimization, which can directly indicate the state of combustion. The precision of the reconstruction path in three-dimensional m...

To explore the source flow control method for the corner separation, this paper takes the NACA65 cascade as the research object and applies the blade leading edge endwall suction technology to control the horseshoe vortex with the numerical simulation method. Combined with topology analysis, the thr...

The variable camber wing has great potential to improve the aerodynamic characteristics of conventional tube and wing design, but it can change the pitching moment of the whole aircraft. The drag reduction advantage and trim penalty of variable camber technology on a blended wing-body aircraft are e...

This study addresses the lack of research on extracting subordination relations between the cells in a table in the field of table recognition and analysis. It defines the table subordination relation extraction task. Based on the similarity between table and graph structures and the graph represent...

Algorithms of robust filtering and adaptive filtering are commonly used to improve the positioning accuracy of the navigation system integrating global navigation satellite system (GNSS) and inertial measurement units (IMU). However, the conditions applicable to robust filtering and adaptive filteri...

To address the problem of multi-parameter joint estimation of incomplete electromagnetic vector sensors in the polarization sensitive array, a joint estimation method of Direction of Arrival (DOA) and polarization parameters is proposed based on a circle array model of the three-dimensional electrom...

Due to the complex structure and function of aero-engine lubrication system, the existing health management system lacks sufficient interpretability and relies heavily on expert experience for fault diagnosis A method for constructing aero-engine lubrication system fault knowledge graph was proposed...

Accurate continuous climb profile prediction can improve conflict detection reliability and departure scheduling precision. A method of modeling aircraft thrust intention based on the thrust setting information is proposed. A vertical profile prediction method for the continuous ascent is suggested,...

To shorten the time spent and reduce the troubleshooting cost of traditional heuristic methods, a method of generating a troubleshooting strategy based on reinforcement learning (RL) and Bayesian networks (BN) is proposed for complex equipment. BN is used for the expression of knowledge to make bett...

Low detection effectiveness and inadequate refinement plague the existing deep learning-based remote sensing ship detection technique. To address the above problems, an optical remote sensing ship critical part detection algorithm based on anchor-free is proposed. The proposed algorithm takes fully ...

In response to the shortage of comprehensive and systematic methods for evaluating the driving safety of unmanned vehicles, an enhanced driving safety field model is proposed, taking into account the impact of the complex road factors of unmanned vehicles as well as the characteristics of three arti...

In response to the difficulty in measuring the ablation performance parameters of thermal protection materials, this paper studies the identification method of ablation performance parameters based on optimization algorithms. The one-dimensional continuous model is used to describe the internal ther...

An optimized deployment model of multiple missile early warning radars is established based on the distinct mission characteristics of early warning radar, tracking and identification radar, and transportable early warning radar in order to address the situation where the deployment of existing miss...

In view of the influence of microvascular on the mechanical properties of laminates, the tensile properties of laminates with varying diameter microvascular channels were studied. Tensile strength and stiffness of laminates with varying diameter microvascular channels were determined by experimental...

This paper proposes the multi-strategy fusion improved adaptive mayfly algorithm (MIMA), which addresses the shortcomings of the improved mayfly algorithm, including its low adaptive ability, minimal population diversity, and poor global search performance. Firstly, Sin chaos mapping was used to ini...