To investigate the effect of ice accretion on helicopter rotors in forward flight in different flight states, a helicopter rotor icing test system was developed. A rotor model icing test was conducted in the 4.8 m× 3.2 m test section of the China Aerodynamics Research and Development Center icing wi...

To train pilots' short-range air combat skills, the traditional way based on flight simulation technology is to have multiple pilots operate multiple fighter simulators at the same time. If an intelligent virtual opponent is used to assist pilots in confrontation training, not only could the normal ...

The additive manufacturing (AM) technology develops rapidly and it is widely employed in the fabrication of aerospace alloy components.Many additive manufacturing alloy components bear cyclic loadings, and the fatigue failure is very common. The fatigue damage model considering the influence of addi...

Target trajectory association method based on detection association and deep learning is one of the research hotspots in the field of computer vision. However, due to the lack of effective space-time constraints in the design of existing methods, and the insufficency of generalization ability of tar...

In numerical simulation of foam microstructure, the geometric characteristics and arrangement of foam cavities have an important influence on calculation efficiency and calculation results. We propose a new algorithm, based on the advancing surface search geometric construction algorithm and the Lag...

In order to further improve the bearing capacity of plastic gears in the transmission of metal worm and plastic helical gears, the force characteristics of the traditional equal-pitch worm helical gear meshing transmission were studied in depth, and the unequal pitch meshing of the worm and the heli...

Automatic modulation recognition is a key technology for spatial cognitive communication system, which helps to realize adaptive signal demodulation. Although the deep neural network has the advantage of strong feature extraction, it suffers from the problems of numerous parameters and large amount ...

Aiming at the problem of model data fusion among different design tools in complex product design, the research explores the fusion strategy of end-to-end heterogeneous model data between tools. A multi-layer collaborative strategy of heterogeneous data is proposed, which uses the dynamic characteri...

In the scientific research field, storage capacity, processing efficiency and analysis accuracy cannot keep pace with the exponential growth rate of scientific data. Thus, a massive scientific data calculation framework named BSDF is proposed based on scientific data structure and standards. A unifi...

This paper proposes an autonomous dynamic obstacle avoidance method for omnidirectional mobile robot by introducing velocity repulsion field to solve the existing problems, an improvement from water flow field based artificial potential field obstacle avoidance method. This paper presents a detailed...

Fault diagnosis is an important technology to improve the reliability of the switched reluctance motor (SRM) speed control system. To address the non-linear and unstable fault signal of the switched reluctance motor power converter, and the problem that effective information is easily covered by noi...

Eye-tracking interaction is the key control method for head-mounted virtual reality (VR)/augmented reality (AR) devices and non-calibrated gaze estimation is one of the core problem in current VR/AR eye-tracking interactions. Efficient and robust non-calibrated gaze estimation requires a large amoun...

Aiming at the problem of multi-UAV cooperative path following in three-dimensional space, a cooperative controller was designed based on backstepping. To avoid control input saturation, an auxiliary controller was introduced to ensure control performance of the system. The six degrees of freedom non...

To reduce the drift of hemispherical resonator gyroscope (HRG) caused by temperature effect, a temperature drift compensation model is established, which compensates the deterministic drift related to temperature. An improved PSO-ARMA modeling method is proposed to compensate the uncertain drift. Th...

To study the hydrodynamic lubrication reliability of journal bearings inside aero-gear pumps running at high speed and with low medium viscosity, an elastohydrodynamic lubrication (EHL) model considering elastic deformation of bearing bush is established by coupling Reynolds lubrication equation wit...

This paper studies a blended-wing-body aircraft with distributed propulsion, explores the influence of suction control (with suction position and suction momentum variables) on the aerodynamic characteristics of aircraft in take-off and cruise state and explains the mechanism of the influence of suc...

To overcome the disadvantages of the existing inertial stabilization platform such as large interference for using mechanical bearings, high difficulty for using air/liquid bearings and poor linearity for using magnetic resistance magnetic bearings, a new Lorentz inertial stability platform (LISP) b...

The backstepping sliding mode control method based on extended state observer (ESO) is proposed, which can solve the compound disturbance problem caused by unmodeled friction force, parameter uncertainty and external random disturbance. The ESO is designed to estimate the velocity and acceleration o...

For the under-actuated quadrotor UAV swarm systems with multiple leaders and followers, a distributed hierarchical formation-containment control method is proposed. First, a hierarchical distributed finite-time sliding mode estimator is designed to achieve that each UAV can generate estimated positi...

Aiming at the problem of slow convergence speed when calculating Lagrange multiplier by bisection method, the proposed Lagrange multiplier calculation method is applied to the optimal criteria (OC) method and the guide-weight (GW) method to update the density, and the results of the proposed method ...