More isolated DC-DC converter topologies are required as a result of the growing need for different power conversion brought on by the development of new energy generation and electrified transportation. To overcome the randomness and lack of topology optimization in generating topologies based on h...

The modular multilevel converter based high voltage direct current (MMC-HVDC) is a dynamic power balancing system. The control system of MMC generally adopts a dual closed-loop vector control strategy based on the traditional instantaneous power model under an asymmetric grid state, which has a comp...

In the process of deriving topologies for power electronic converters, researchers often use topology equivalence or topology isomorphism to identify topologies with different structures but identical performance, thereby avoiding redundant studies. However, the connotations of topology equivalence ...

Up to now, massive power electronics converters have been derived to satisfy various demands in practical applications. However, most of these methods focus on discovering effective converters, ignoring the redundant switches in converters. This paper aims to delete converters with redundant switche...

With the widespread application of single-inductor multiple-output (SIMO) DC-DC converters, their dynamic response has much concern for domestic and foreign researchers. To explore the theoretical limit of the optimal dynamic response for the SIMO Buck converter, this paper first establishes a corre...

In order to compare and optimize a series of DC-DC converters with similar topological structures and functions, a comprehensive topology evaluation method based on the analytic hierarchy process and entropy method is proposed. A hierarchical evaluation index system is created by compiling the commo...

Single-inductor multi-port (SIMP) converters have great application potential due to their “more silicon less magnetic” feature. However, there are so many switching modes of SIMP converters that the modulation strategy design is complicated. At present, the design of the modulation strategy is main...

The prognosis and health management (PHM) technology of lithium-ion batteries helps reduce the probability of failure and improve the service time by analyzing current reliability and formulating a comprehensive control strategy. Analysis and forecasting of battery failure are key components of batt...

The cyclone global navigation satellite system (CYGNSS) provides high-quality global navigation satellite system reflectometry (GNSS-R) data that can be reliably used for the retrieval of significant wave height (SWH). Due to the high dynamic nature of CYGNSS, the received signal is easily affected ...

To reduce the difficulty of extracting small object features from high-resolution remote sensing images, a dual-encoder feature fusion network model based on convolution structure and self-attention mechanism was proposed, which was suitable for semantic segmentation of high-resolution remote sensin...

A data imputation algorithm based on a graph neural network is proposed to address the issue of missing flight ground support data. Firstly, to reduce the impact of noise in the original data on training denoising autoencoder is applied to enhance the reliability of feature extraction. Secondly, a g...

A high-precision dynamic temperature control system is proposed, developed, and tested with the goal of addressing the issue that the existing ground temperature environment simulation equipment finds it challenging to realize the temperature deviation test of scientific loads with extremely high te...

By analyzing the impact of mechanical vibration on the safety of lithium ion batteries in various application scenarios, such as transportation and aerospace, the 18650 battery was used as a sample, and the.influence of vibration conditions on the internal structure, cyclic aging mechanism, electric...

Accurate prediction of flight ground service is the key to achieving fine flight management and improving management efficiency of the airport collaborative decision making (A-CDM) system. Therefore, a multi-node dynamic prediction method for flight ground service based on a cascaded multi-output gr...

Unmanned aerial vehicle （UAV） has been widely used in various fields, target tracking is one of the key technologies of UAV applications. A UAV tracking algorithm based on feature fusion and segmented attention is proposed to solve the problems of UAV appearance changes and external interference whe...

In view of the problem of critical aircraft identification in air traffic situations, the existing research fails to fully consider the spatiotemporal effect in actual air traffic operation. Therefore, a method of critical aircraft identification based on a temporal network was proposed. Based on th...

To improve the angular momentum envelope analysis efficiency of typical gimbal-type momentum exchange devices such as single-gimbal control moment gyroscope (SGCMG), double-gimbal momentum wheel (DGMW), and magnetically suspended control and sensing gyroscope (MSCSG), a gimbal equivalent-based angul...

Qualified missile damage effectiveness is an important guarantee to give full play to combat effectiveness. The damage effectiveness identification test research is especially important to determine whether the missile damage effectiveness is up to par. In view of the limitations of the existing dam...

An occluded vehicle tracking method that fuses full-scale features with trajectory correction based on the Deep SORT algorithm is proposed to improve the tracking drift and identity switching (IDS) problems caused by occlusion in vehicle tracking. First, a full-scale feature extraction network is in...

During the parallel separation process of two stages to orbit (TSTO) vehicles, there are multiple reflections of shock waves between the first and second stage vehicles. The complex flow has a great impact on the pressure distribution, torque characteristics and flight attitude of the vehicles, and ...

With the rapid development of the civil aviation ticket fare search system business, the internal network traffic scale of the search system cluster continues to grow. Under high-load network traffic, a cluster data synchronization scheme based on the Gossip protocol was developed. This solution is ...

Based on the quasi-linear implicit aeroelastic modeling method, a coupled flexible multibody dynamics model suitable for distributed multi-rotor/tilting wing aircraft was established, and its aeroelastic coupling dynamics characteristics were studied. Based on the moderately deformed beam model and ...

As one of the quality indexes of the wind tunnel flow field, the dynamic pressure field of the wind tunnel directly affects the accuracy of experiment results, and the dynamic pressure field needs to be checked regularly. Dynamic pressure field verification equipment includes a five-hole probe, pipe...

Thermal insulation structure is the key factor to ensure high-speed aircraft work safely and complete various tasks. The multilayer thermal insulation structure has attracted much attention because of its light weight and excellent thermal insulation effect. The performance of the multilayer thermal...

In view of the object capture and control problem of a dual-arm space robot, a new spherical cage-based scheme for dual arms to capture moving objects was designed. Firstly, in order to avoid pushing away from the object when captured by the manipulator, a structure with a spherical cage of dual arm...

The stable control of tank pressure is crucial in the pressurization system of spacecraft tanks. In this paper, an adjustable Venturi tube based on a special conical pintle was designed, which could maintain a good linear correspondence between the pintle displacement and the flow rate, thereby impr...

In order to evaluate in-orbit operation characteristics of BeiDou-3 Navigation Satellite System (BDS-3) spaceborne atomic clocks, the broadcast clock offset parameters and precise clock offset data released by the International GNSS Service (IGS) Analysis Center were used to analyze the satellite’s ...

In response to the significant impact of speckle noise on the detection accuracy of synthetic aperture radar (SAR) image changes, the high network model complexity of existing capsule network-based image change detection methods, and the loss of a large amount of original image information in traini...

In order to improve the prediction accuracy of ultra-short-term wind power, a combined prediction model based on variational modal decomposition (VMD), hierarchical principal component analysis (HPCA), and gated recurrent unit (GRU) neural network optimized by COOT algorithm was proposed. Firstly, t...

The leaf spring rubber bearings are important load-bearing and vibration-absorbing components in heavy trucks and often suffer from short fatigue life and poor durability under cyclic loading conditions. This work took the leaf spring rubber bearing as the research object, calculated its vertical st...

At present, micro air vehicles (MAVs) are being popularized in both military and civilian fields and are playing an increasingly important role. The flapping wing organism shows its advantages of high aerodynamic efficiency, quick action, and stable hover during flight. In this paper, by studying fl...

To realize continuous leapfrog upgrades of the hypersonic vehicle from single-point optimal fixed configuration to full envelope optimal of morphing configuration, a quasi-wave rider profile and composite deformation scheme morphing wingspan and sweep are designed. On this basis, to reduce the compu...

In order to overcome the difficulties of ambiguous initial circumstances, intricate process constraints, and strict terminal restrictions in the guidance of reusable launch vehicles, this work suggests an online trajectory optimization technique that combines convex optimization and fourth-order pol...

In order to achieve rapid response and vibration suppression of high-precision magnetic levitation turntable and ensure high-precision decoupling control of Lorentz force magnetic levitation omnidirectional stable platform, the working principle of radial Lorentz force magnetic bearings (RLFMBs) was...

To balance the efficiency and cost of offline database construction, as well as the efficiency and accuracy of online matching and localization in WiFi fingerprint localization, this paper proposed a dual-dimensional partition localization (DDPL) algorithm based on wireless access point (AP) virtual...