With the wide application of fiber-reinforced composite primary structures in many fields, fatigue has become a critical problem in composite structural design and analysis. Based on the development of fatigue theory of composite materials, many theoretical methods and numerical models for life pred...

To obtain accurate estimation of ship heave motion information in real time, according to the ship heave kinematics model and spectral analysis method, an analytical model describing the relationship between the acceleration measurement information of the Inertial Measurement Unit (IMU) and the ship...

The power supply capability is proportional to the effective area of spacecraft solar array. For cylindrical manned spacecraft, a calculation method for effective area of body mounted solar array is proposed. First, the mounted solar array was divided into n parts along the circumference. The angle ...

Aiming at the problem of non-convergence of the material distribution at the end of the cantilever beam structure under self-weight load, a topology optimization method for the cantilever beam structure under self-weight load is proposed to solve the problem. According to the principle of virtual wo...

Aimed at the problems of slow convergence speed, premature maturity, and poor optimization results when the standard genetic algorithm solves the loading plan, based on the anthropomorphic loading strategy, an improved genetic algorithm is proposed to maximize the utilization of container space, con...

With the steady progress of Shenzhou spaceship series tasks and space station construction tasks in China, Chinese astronauts are facing frequent extravehicular activities, the range of astronauts' extravehicular activities will gradually increase, and the operation position of astronauts will chang...

Large target's Radar Cross Section (RCS) estimation using scaling model is a common method to obtain RCS at the development phase. However, according to classical electromagnetic similarity theory, measurement of scaled target coated with microwave absorbing material is difficult to meet the scaling...

The aerodynamic performance of insect can be affected by wing stroke deviation, which may also influence the flight stability. The longitudinal and lateral non-dimensional stability derivatives of hoverfly with stroke deviation are obtained by solving Navier-Stokes equation, and then the natural mod...

The loading problem of Euler beam with one end clamped and one end having concentrated load is a basic mechanical model, which has important theoretical significance. In order to solve the problem that the traditional linear method is not applicable to large deflection analysis and cannot calculate ...

In view of the shortcomings of the existing algorithms for blind recognition of packet interleaver, which are high computational complexity and poor fault tolerance, a new recognition algorithm based on the distribution of synchronization codes after packet interleaving is proposed in this paper. Fi...

Accurate fault diagnosis of rolling bearing is a necessary means to ensure the safe and reliable operation of mechanical equipment. In this paper, a fault diagnosis method based on Deep Residual Shrinkage Network (DRSN) is proposed for the vibration signal of rolling bearing with multiple faults and...

In order to ensure the real-time maneuverability and high-precision requirements of orbital maneuver, a real-time maneuver decision-making method based on machine learning is proposed. The optimal solution under perturbation is obtained offline through the optimization algorithm. The two-body soluti...

In order to study the dimension reduction and visualization of multivariate interval data, a two-dimensional array including center and log-radius is used as the expression of interval data. Then the algebraic algorithm of interval data is given, and a new Principal Component Analysis (PCA) method o...

In recent years, researches on the elastic band gaps in periodic structures to reduce vibration have attracted widespread attention. However, it is difficult to design a band gap with wide bandwidth and good tunability. Aiming at this problem, we designed a periodic structure with piezoelectric netw...

In order to estimate the effects of swirl at outlet of S-shaped inlet on the performance of axial flow compressor, a swirl distortion network was optimized and designed to simulate the swirl flow field. The aerodynamic response of the single-stage axial flow compressor under the effect of the swirl ...

A Two-Step Kalman Filter (TSKF) algorithm is designed to overcome the influence of clock error and satellite position error on pulsar position error estimation. First, the traditional model of pulsar position error estimation is introduced, and it is confirmed by analysis that the clock error, satel...

Satellite-based Augmentation System (SBAS) relates to the field of life safety through a wide-area augmentation system that provides integrity information to users. To improve SBAS's ability to resist spoofing, firstly, based on the Elliptic Curve Digital Signature Algorithm (ECDSA), this paper prop...

Adaptive noise cancellation has important applications in many fields. In order to carry out adaptive noise cancellation, a new steepest descent algorithm is proposed. The main principle of the algorithm is to reduce the dimension of multivariate quadratic function to make it become a univariate qua...

The detection of multiple types of targets in the airport area under the satellite remote sensing monitor is of great military and civilian significance in real life. In order to effectively improve the detection accuracy of remote sensing images in the airport area, based on the representative deep...

Aimed at the path planning problem of Unmanned Aerial Vehicle (UAV), a path planning method based on a Chaotic Multi-Leader Whale Optimization Algorithm (CML-WOA) is proposed. In the known flight environment, 3D model of flight area and a flight path cost model are established. By introducing penalt...

In this paper, the influence of the head disturbance block on the structure of the flow around the back of the slender body is studied. The slender body model is simulated at the angle of attack of 5°-60° through numerical simulation. The numerical calculation method selected is the Reynolds Average...

Fatigue tests and fracture morphology analyses were performed to determine the influence law and mechanism of pore defect and incomplete fusion defect on the fatigue performance of 5A06-O/7A05-T6 dissimilar aluminum alloy TIG butt joint. The results show that both pore defect and incomplete fusion d...