A5037804712- Advanced Computational Techniques and Applications
- Simulation and Modeling Applications
- Medical Image Segmentation Techniques
- Electromagnetic Launch and Propulsion Technology
- Advanced Algorithms and Applications
- Advanced Decision-Making Techniques
- Energetic Materials and Combustion
- Advanced Measurement and Detection Methods
- Adaptive Control of Nonlinear Systems
- Advanced Sensor and Control Systems
- Combustion and Detonation Processes
- Advanced Image and Video Retrieval Techniques
- Engineering and Test Systems
- Embedded Systems and FPGA Design
- Robotics and Sensor-Based Localization
- Aerospace and Aviation Technology
- Real-time simulation and control systems
- Aerospace Engineering and Control Systems
- Image and Video Stabilization
- Forecasting Techniques and Applications
- Video Surveillance and Tracking Methods
- Adaptive Dynamic Programming Control
- Advanced Control Systems Optimization
- Service-Oriented Architecture and Web Services
- Artificial Immune Systems Applications
Northwestern Polytechnical University
2009-2023
RELX Group (United States)
2012
Ordnance Engineering College
2005
The auction algorithm is a widely used method for task assignments. However, most existing algorithms yield poor performance when applied to multi-UAVs dynamic assignment. To end this, we propose novel hybrid "Two-Stage" based on the hierarchical decision mechanism and an improved objective function, which simultaneously realizes heterogeneous assignment with limited resources of each UAV avoidance obstacle path planning. In first stage, according proposed mechanism, select that urgently...
In this paper, a quaternion-based adaptive dynamic surface control method is proposed for attitude tracking small-scale unmanned helicopters with external disturbance and uncertain dynamics. The quaternion formalism introduced multi-input-multi-output nonlinear model derived from the dynamics of helicopter. low-complexity controllers are designed by as it eliminates problem explosion items. singularity avoided substituting Euler kinematic equations in expressions integrating into design...
The active contour model (ACM) is a popular approach for image segmentation. Many existing ACMs perform poorly in severe inhomogeneous images. To address this issue, novel local and global ACM (LaG_ACM) proposed paper. First, we define fitting formulation that encodes the property of an energy term using relative entropy between original formulation. Then, bias field defined to extract information estimate field. By integrating with ACM, specify mean squared error accommodate More...
The geometry nonlinear aeroelastic problems of the high-aspect-ratio unmanned aerial vehicles (UAV) are prominent, which will bring many adverse factors to flight control. A UAV controller design technique in accordance with L1 adaptive control algorithm is therefore suggested increase system's robustness. First, effects brought by aerodynamic lift surface model static problem analyzed. Then, a longitudinal channel designed, including law, and state observer. Next, stability designed...
An invention scheme of pulsed magnetohydrodynamic generator (PMHDG) in milliseconds order magnitude that can be used directly electric launchers is presented for the first time. It either different from ordinary small power dc MHD generators plants, or explosive where its current width microseconds magnitude. Operating principle PMHDG as follows: fuels oxidizing agents within two storage vessels are injected into a combustion chamber to combust by pump and valve, after waiting pressure (or...
A real-time detection and tracking method of landmark based for UAV visual navigation fixed landing was proposed. This used the SVM classification algorithm to train offline classifier on SURF-BoW features extracted from samples, which can recognize accurately complete initialization tracker. Afterwards, tracked via improved median flow ensure reliability integrity target. Finally, principle similarity between two adjacent frames' target, this paper designed a target re-search that be...
In order to find an applicable power supply used in electric guns, there have been two types of the magnetic flux compression linear generator (MFCLG) that use solenoids as stators. That is say, a piston armature or solenoid within stator. Although they can amplify current theoretically, only compress component flux. So their efficiency low, and exist some difficulties, which difficult solve terms engineering technology. addition, leads increment ineffective part solenoid. A kind rail stator...
Adaptive tracking control problem for disturbed nonlinear systems with the time derivative of disturbance being unbounded is investigated in this paper. Different from existing literatures, a new observer constructively proposed its parameters functions rather than constants, which results manner our observer. The convergence then proved based on Lyapunov stability theorem. Moreover, it that error system can be regulated to arbitrary small by appropriately choosing design and parameters....
An invention scheme of pulsed MHD generator (PMHDG) in milliseconds order magnitude that can be used directly electric launchers is presented for the first time. It either different from ordinary small power DC generators plants, or explosive where its current width microseconds magnitude. Operating principle PMHDG as follows: fuels oxidizing agents within two storage vessels are injected into a combustion chamber to combust by pump and valve, after waiting pressure (or density) generated...
Fly-by-wire flight control system is widely used in modern aircrafts and the computer a kernel system. In order to improve reliability of computer, redundancy technique build redundant which consists multiple channels each channel has its own CPU. However, this method brings huge difficulties for debugging testing software, because software's must be implemented considering communication, synchronization, cross-monitoring among software channel. This will cause delay development, much work...