In order to improve the performance of satellite selection algorithm, the Particle Swarm Optimization (PSO) satellite selection algorithm based on artificial fish swarm algorithm is proposed. Using the global convergence characteristics of artificial fish swarm algorithm, the algorithm can overcome ...

In this paper, a statistical algorithm based on polynomial chaos expansion and dipole approximation for electromagnetic radiation calculation of interconnected cables with random parameters is proposed.In this method, orthogonal polynomials are used to expand the equation of the multi-conductor tran...

Aimed at the problems of lacking the theoretical research on the spiral winding deformation for soft gripper and the traditional soft gripper having a low load capacity, the research on the spiral deformation characteristics and the closed capture form of the fiber-reinforced bionic soft gripper was...

Simultaneous Localization and Mapping (SLAM) is one of the key technologies in visual navigation, and loop closure detection is a basis of SLAM. An efficient and accurate loop closure detection algorithm is proposed to solve the problem of low accuracy rate of SLAM loop closure detection. The loop c...

In order to solve the problem of electromagnetic characteristic parameters of periodic structures, an INBC-FDTD calculation method based on network analysis method and vector fitting method is:introduced in this paper, which can be used to quickly solve the electromagnetic characteristic parameters ...

Aiming at the problem of human eye detection in complex scenes, indirect methods and direct methods have certain limitations.A direct human eye detection method which is independent of face detection is proposed. The proposed method detects eyes under multiple scales especially small scale in comple...

This paper proposes a novel Moving Path Following (MPF) control method by improving the time-varying vector field method. Moreover, it is applied to the automatic carrier landing problem of carrier-based aircraft. Based on the nonlinear model of carrier-based aircraft, backstepping method is used as...

Traditional aero-engine Remaining Useful Life (RUL) model cannot objectively describe the multi-stage degeneration process, and the accuracy of RUL prediction is low. To solve this problem, a new multi-stage RUL prediction model for RUL prediction is proposed, including super statistics theory, muta...

Scale Adaptive Simulation (SAS) is used to study the flow around a circular cylinder at Reynolds number 3 900. SAS predictions are compared with the popular Detached Eddy Simulation (DES) and existing experimental data. The effect of grid resolution and spanwise domain size on SAS model performance ...

Lift-type hybrid airship is an important choice of long-distance and large-load transportation. With the development of global trade, it has gradually become a research hotspot at home and abroad. As a new concept aircraft combining aeronautical science and technology, new energy technology and high...

For complex systems with newly developed products and less failure data, a competitive failure model in which natural degradation and external shocks are independent of each other in an uncertain environment is proposed. Considering that the system suffers from natural degradation and external shock...

Aimed at Cooperative Multi-Task Assignment Problem (CMTAP) of Unmanned Aerial Vehicle (UAV) formation, considering the situation of cooperative detection and attack of two aircraft, combining the constraint conditions of time constraint, time sequence constraint, time interval constraint, ammunition...

In the maneuvering process of air-breathing hypersonic vehicles, the aerodynamic characteristics show strong unsteady characteristics due to the complicated configuration. Traditional flight simulations based on database or aerodynamic models cannot exactly describe the complex aerodynamic character...

Neutron is one of the important radiation factors that affect the safety of spacecraft and astronauts. It is difficult for neutron measurement to optimize the neutron detector, improve the measurement efficiency, and improve the inversion accuracy. A neutron detector based on a new type of neutron d...

In this paper, grid-search method is introduced into artificial neural network model incorporating spatial structure, which is a new method of model estimation, to do out-of-sample prediction. This method is based on the artificial neural network algorithm, is combined with the idea of spatial autor...

The method based on the piezoelectric impedance method using statistical parameters as the damage index to evaluate loose bolt has a wide range of applications. However, most of the test objects adopting this method are structures such as plates under laboratory conditions, which are not real struct...

In this study, several sets of experiments were carried out to evaluate the characteristics of micro milling holes in high-strength elastic alloy 3J33B material using an ultra-precision machine tool. The milling forces were measured using a Kistler 9119AA2 dynamometer, and the sizes and surface burr...

On one hand, it is difficult to establish an accurate dynamical model description reflecting structural characteristics of a real-world complex structure with freeplay nonlinearity because of the inconvenience or impossibility of measuring the gap. On the other hand, even though the freeplay has bee...

A new ISAR imaging algorithm for high-speed maneuvering target is proposed to solve the Doppler ambiguity problem under Migration Through Range Cells (MTRC). First, the algorithm transforms the original signal to the image domain, then extracts the strongest scattering point, estimates the chirp rat...

In the field of Synthetic Aperture Radar (SAR) image analysis, as an important target, aircraft detection has attracted more and more attention. In order to solve the problem that traditional aircraft detection algorithms need to design hand-crafted features and have poor robustness, this paper prop...

In the Global Navigation Satellite System (GNSS), a channel compensation technique based on BDS/GPS Kalman Based Least Mean Square estimation (KBLMS) is proposed to address the problems that the single system cannot locate in the city canyon, the signal cannot be captured after locking, and the trac...

With the increase of space camera resolution, the requirements for temperature stability and uniformity of the optical system and the main load-carrying construction become higher and higher. It is a big challenge for the high-precision thermal control design of the Geostationary Orbit (GEO) camera ...