As a more general description of affine nonlinear systems, the practical applications corresponding to non-affine nonlinear systems are more comprehensive and closer to reality. Therefore, it is essential to study the control problems of non-affine nonlinear systems. However, the closed-loop system’...

This research develops a domain adaptive fault diagnosis method based on an enhanced residual network (ResNet) to address the issues that the distribution of training samples and test samples differs in bearing fault diagnosis and the imbalance of different fault data results in a low fault recognit...

Current deep learning-based visual tracking algorithms have difficulty tracking the target accurately in real-time in complex long-term monitoring environments including target size change, occlusion, and out-of-view. To solve this problem, a fast long-term visual tracking algorithm is proposed, whi...

A fault-tolerant control method with prescribed performance based on reinforcement learning was proposed for spacecraft attitude control with inertia uncertainties and actuator faults. In order to ensure the transient response of the control process, the attitude controller of the spacecraft was des...

With the goal of observing how a pilot’s response changes when he or she manipulates the toggle switch in the cockpit, an experimental flight simulation cabin will be built, response time data will be gathered from the pilots when they manipulate the toggle switch, and the multi-factor variance anal...

The aircraft landing scheduling problem has been proven to be an NP-hard problem. A multi-aircraft optimization model with time window constraints is established for the fixed aircraft scheduling sequence considering more practical situations. The concept of compact subsequence, its properties, left...

A new type of stress testing technology has been developed in the last 20 years by combining pixelated polarization cameras with traditional photoelastic methods. It overcomes the disadvantages of traditional photoelastic methods such as weak ability to resist environmental light interference, compl...

In order to improve the smoothness and stability of rail grinding by the rail grinding vehicle, an electric hydrostatic actuator (EHA) was proposed to replace the traditional hydraulic system as the special actuator of the rail grinding vehicle. By considering the nonlinear factors including the tot...

In view of the modeling errors and poor anti-disturbance ability of folding wing vehicles (FWV) and the difficulty in manual parameter setting of active disturbance rejection controllers (ADRC), an optimization algorithm based on improved equilibrium optimizer based on Lévy（LEO）was proposed. A dynam...

In order to improve the analysis and processing speed of power system fault text in actual business scenarios, a power fault text information extraction model based on pre-training and multi-task learning was proposed. The pre-training model was used to learn the context information of power text wo...

By considering changes in the structural configuration caused by the rotation of the solar panel in the space solar power station (SSPS) during in-orbit operation, a variable forgetting factor generalized yet another subspace tracker (VFF-GYAST) method was proposed to identify the modal frequency pa...

In this paper, considering the existence of external disturbances, an adaptive backstepping-based sliding mode region reaching controller is designed for a class of uncertain nonlinear systems in parametric strict-feedback form. The robustness of the system for mismatched uncertainties and unknown d...

The calculation of the wing slipstream zone area is the key to analyzing aerodynamic interference between rotor and wing on the tiltrotor aircraft. A visual calculation method was proposed for calculating the wing slipstream zone area on the tiltrotor aircraft through aerodynamic and three-dimension...

This study introduces meta-learning technology to propose a meta-learning-based few-shot object detection algorithm for the few-shot item detection job in remote sensing photos. The object and background are easily confused under the condition of large-scale changes and small samples in remote sensi...

The flight process of reentry vehicles requires traversing a vast area from the near space to the ground. During this process, even minor modeling errors and external disturbances can lead to deviations from the original target point or exceed the constraint boundaries. To enhance the robustness of ...

The complex burn-back analysis and internal ballistic performance prediction of the non-uniform grain are the core issues in solid rocket motor design. A mathematical model of burn-back analysis of combustion with non-uniform grain was established. A new method, namely Poisson equation-eikonal equat...

Combining intelligent detection and tracking algorithms with the flexibility of unmanned aerial vehicle (UAV) is a hot research topic for UAV applications. A UAV pedestrian tracking algorithm based on detection and re-identification was proposed for solving the problems of target slippage and occlus...

Taking into account the buffering and walking characteristics, a performance analysis and landing leg configuration optimization method is proposed to address the issue of the lunar probe integrating landing buffer and lunar walking functions, which causes challenges in its design optimization. Acco...

Power line communication (PLC) decreases cabling volume and reduces wiring harness complexity. Therefore, capacity is not optimal if sufficient cyclic prefix (CP) that is no shorter than the channel duration is employed. Multipath components, on the other hand, suffer modest attenuation in PLC chann...

To handle the stabilization problem of the towed buoy in the straight-circulating flight transition process of the aerial recovery towing system under airflow disturbances, a trajectory design method for the transition process of the towing system based on differential flatness theory was proposed. ...

Compared with terrestrial network facilities, the resources of satellites are very limited, and the traditional fixed grouping and fixed resource allocation methods lack flexibility and limit the system capacity in the face of the uneven distribution of user geographic locations and traffic demands....

This paper proposes a fatigue damage evolution model and numerical calculation method based on the theory of continuum damage mechanics, taking into account the effects of vacuum chemical heat treatment. Rotating bending fatigue damage analysis and life prediction are performed for M50NiL bearing st...

The transient liquid-phase (TLP) diffusion connection can obtain welds similar to the tissue performance of the parent material, so it has become an important bonding technology for the nickel-based superalloy structure of the aviation engine thermal end component and is widely used. The isothermal ...

Airfoil stall is an aerodynamic phenomenon that needs to be considered in the design of wind turbines, and the main reason for stall is that the flow energy in the boundary layer is insufficient to provide sufficient adhesion. This problem can be effectively solved by injecting the high-momentum air...

Based on the Tau-Omega model, a spaceborne global navigation satellite system relectometry (GNSS-R) forest aboveground biomass inversion method considering the correction of ground soil moisture is proposed. The cyclone global navigation satellite system (CYGNSS) reflectance was corrected using the ...

Whirl flutter has become one of the essential aeroelastic problems faced by distributed electric propeller aircraft due to multiple propeller motors. Based on the motion and force relationship of the wing/nacelle/propeller coupling system, the downwash and sidewash effects of the wing on the propell...

The Harris Hawk optimization algorithm tends to fall into local optimum due to poor population diversity when solving multi-objective optimization problems. To address this issue, a multi-objective Harris Hawk optimization algorithm based on adaptive Gaussian mutation was proposed. To make the solut...

To investigate the reasons for the typical symptoms of iliac vein compression syndrome with the collateral veins, a typical iliac vein blood flow field with a collateral vein was numerically studied. The viscous resistance coefficient of the porous media model was adjusted to simulate the second and...

The autonomous satellite constellation navigation system faces model uncertainty and is difficult to accurately obtain statistical characteristics of the time-varying system noise, thus affecting the navigation accuracy. To address this issue, an unscented Kalman filter (UKF) algorithm based on the ...

In large eddy simulation (LES), the influence of subgrid-scale turbulence-radiation interaction (SGS-TRI) on the radiative source term for Sandia Flame D and the scaled Sandia flame D (Flame 4D) was studied. The transport probability density function (TPDF) method was used to simulate the turbulence...