A5038251304- Aerospace Engineering and Energy Systems
- Adaptive Control of Nonlinear Systems
- Spacecraft Dynamics and Control
- Guidance and Control Systems
- Spacecraft and Cryogenic Technologies
- Hydraulic and Pneumatic Systems
- Iterative Learning Control Systems
- Visual Attention and Saliency Detection
- Military Defense Systems Analysis
- Adaptive Dynamic Programming Control
- Biomimetic flight and propulsion mechanisms
- Underwater Vehicles and Communication Systems
- Advanced Image and Video Retrieval Techniques
- Face Recognition and Perception
- Fluid Dynamics Simulations and Interactions
- Advanced Neural Network Applications
- Image Enhancement Techniques
- Innovative Energy Harvesting Technologies
- Olfactory and Sensory Function Studies
- Process Optimization and Integration
- Stability and Control of Uncertain Systems
- Robotics and Sensor-Based Localization
- Aerospace and Aviation Technology
- Cryospheric studies and observations
- Electromagnetic Launch and Propulsion Technology
Nankai University
2014-2025
Tianjin haihe hospital
2025
TianjinSino-German University of Applied Sciences
2017-2019
This paper presents a finite-time fault-tolerant control strategy based on novel reaching law, which is proposed as solution to the trajectory tracking problem of quadrotor unmanned aerial vehicle (UAV) in presence external disturbances, system uncertainties, and actuator faults. First, adaptive law proposed, enables sliding mode surface approach origin with minimal rate, thus effectively reducing chattering. Then, high-order observer (HOSMO) designed estimate unmeasured linear velocity...
Abstract Given the shortness terminal guidance time, convergence time of a law is key performance metric. To address this challenge and enhance missile warheads' effectiveness, three‐dimensional coupled nonlinear dynamic system with line‐of‐sight (LOS) angle constraint considered. An innovative predefined‐time proposed, ensuring that independent initial conditions parameter selection, as an explicitly adjustable parameter. Firstly, based on theory convergence, sliding manifold constructed to...
This paper presents the dynamic modeling process of a powered parafoil (PPF). The PPF is composed and payload equipped with propeller. suspended to via two suspending points, therefore motion relative must be considered in control study. proposed model derived from Lagrangian equations constraints six degree freedom (DOF) DOF payload. In process, velocity, angular rate force are introduced detailed provided. Time-domain response under different conditions calculated characteristics analyzed....
A novel modeling method, based on computational fluid dynamics (CFD) to simulate a parafoil flying in rain and wind environments, is proposed. Then, the dynamic model of powered complex environment established basis revised aerodynamic equations. By introducing path-following controllers active disturbance rejection control (ADRC), horizontal longitude trajectory tracking realistic environments are simulated. Results verify effectiveness methods.
Disturbances and uncertainties are the main concerns in control systems. To obtain this information real time, extended state observer is proposed as core of active disturbance rejection control. However, estimation errors cannot converge to zero presents unknown but bounded disturbances, which will bring unexpected tracking closed-loop system. By taking advantage linear super-twisting algorithm, deal with non-diminishing second-order derivable disturbances paper. The asymptotic convergence...
Abstract High‐precision servo motor control has been a challenging problem due to the multiple disturbances such as friction, load variation and wide/narrow‐band torque disturbances. Particularly, discontinuous fast time‐varying friction is very difficult be compensated, which tends trigger undesirable limit cycle. In addition, function of angular velocity, makes online compensation extremely hard in absence velocity measurement. To make matter worse, nonvanishing narrow‐band some...
Effective fusion of different types features is the key to salient object detection (SOD). The majority existing network structure designs are based on subjective experience scholars, and process feature does not consider relationship between fused highest-level features. In this paper, we focus propose a novel global attention unit, which term “perception-and-regulation” (PR) block, that adaptively regulates by explicitly modelling interdependencies perception part uses fully connected...