A5100635100- Space Satellite Systems and Control
- Astro and Planetary Science
- Distributed Control Multi-Agent Systems
- Control and Dynamics of Mobile Robots
- Spacecraft Dynamics and Control
- Adaptive Control of Nonlinear Systems
- Nuclear reactor physics and engineering
- Planetary Science and Exploration
- Heat Transfer Mechanisms
- Distributed and Parallel Computing Systems
- Turbomachinery Performance and Optimization
- Interconnection Networks and Systems
- Advanced Adaptive Filtering Techniques
- Nuclear Engineering Thermal-Hydraulics
- Software-Defined Networks and 5G
- Real-Time Systems Scheduling
- Robotic Path Planning Algorithms
- Speech and Audio Processing
- Embedded Systems Design Techniques
- Advanced Software Engineering Methodologies
- Nuclear Physics and Applications
- Network Traffic and Congestion Control
- Protist diversity and phylogeny
- Acoustic Wave Phenomena Research
- Parallel Computing and Optimization Techniques
Northwestern Polytechnical University
2016-2025
Sun Yat-sen University
2020-2024
Chang'an University
2020
Institute of Electrical and Electronics Engineers
2020
Regional Municipality of Niagara
2020
IEEE Computer Society
2020
Beijing Aerospace Flight Control Center
2018-2019
Wuhan Polytechnic University
2019
North China Electric Power University
2015
Kunming University of Science and Technology
2014
The issue of space debris capture and removal has become extremely urgent, due to the huge amounts passive (or active) along operational orbits. As a promising solution, tethered net is low cost executable. Based on this kind nonmaneuverable net, new solution for proposed in paper, named maneuverable (MTSN). We first describe structure MTSN detail, then give typical mission scenario. Then, kinematics dynamics model derived under some basic conclusions single tether. An appropriate initial...
In this brief, we focus on the study of formation tracking problem for a class multiagent systems with nonlinear dynamics and external disturbances in presence relative distance constraints. A novel distributed control strategy is proposed based an integration radial basis function neural network (NN) artificial potential field method. The constraints between arbitrary adjacent agents can be ensured by function. Based NN approximation property, it has been to neutralize agents. To account...
DNA methylation and repressive histone Histone3 Lysine9 (H3K9) dimethylation correlate with chromatin silencing in plants mammals. To identify factors required for H3K9 dimethylation, we screened suppressors of the repressor silencing1 (ros1) mutation, which causes expression RD29A (RESPONSE TO DESSICATION 29A) promoter-driven luciferase transgene (RD29A-LUC) 35S NPTII (NEOMYCIN PHOSPHOTRANSFERASE II) (35S-NPTII). We identified folylpolyglutamate synthetase FPGS1 known factor DECREASED...
Summary Stabilization control is an essential mission for the tethered space robot‐target combination during postcapture phase of robot (TSR). In this paper, stabilization problem such a tumbling studied. With consideration tether and attitude TSR's gripper, dynamic model first derived using Lagrange method. Then robust nonlinear controller proposed based on backstepping Considering constraint velocity tether, command filter method utilized to guarantee within permitted range. A feedback...
The use of maneuverable tethered space net robot (TSNR) is a promising solution for active debris capture and removal due to its large envelop easy method. However, the flexibility elasticity underactuated present new challenge control scheme. In this article, fuzzy-based sliding-mode proposed applied TSNR. main contribution that an adaptive super-twisting (ASTSMC) investigated with novel adaption law based on fuzzy estimator, eliminating need derivative uncertainty. key advantage scheme...
Tethered space net robot (TSNR) has been proposed as a promising method for active debris capturing and removal since have posed big threat to operational satellites astronauts. After contacting the debris, cannot naturally wrap around especially when does not contact in center. Thus, it is worth investigating closing control of TSNR. Two requirements should be satisfied algorithm. First, algorithm make close very short time avoid escape debris. Second, input continuous oscillations tether...
The postcapture of a partially failed spacecraft by space manipulators will bring mutation in the dynamics combination. Both inertia properties and thruster configuration matrix change significantly. unknown also cause tremendous technical challenge for attitude takeover control. Accordingly, this paper describes novel reconfigurable control system with parametric uncertainties, whose fuel has been exhausted or actuators have partial malfunctions. First, law is designed command filtering...
Maneuverable tethered space net robot (TSNR) is promising for active debris removal due to its flexibility and controllability. However, the contact dynamics of TSNR not completely understood. Therefore, analyzed does close after contact. A super-twisting sliding mode control scheme designed make closed avoid risk tether cut. The efficacy controller validated by simulation results.
This brief addresses the distributed estimator of each follower NMR, which uses its own information and neighboring NMRs, is designed to estimate leader's states. By means these estimates, a formation controller proposed for NMRs that are also required track leader NMR. Lyapunov function techniques employed analyze as well controller. Simulation experiment examples presented illustrate theoretical results.
The chlorophyll-a (Chl-a) concentration is commonly considered as the main indicator of phytoplankton biomass in coastal waters. Forecasting and understanding status Chl-a beneficial to ecosystem management an important emergency measure for algae blooms. To obtain accurate predictions, long short-term memory neural network (LSTM) gated recurrent unit (GRU) were implemented forecasting, based on LSTM GRU units, two simplified attention-based encoder-decoder (AEDRNN) models also developed...
As mobile computing is getting popular, there a growing need for techniques that minimize energy consumption on battery-powered devices. Processor voltage scheduling can effectively reduce processor by lowering the speed. In this paper, we study real-time periodic tasks with non-preemptible sections. Three schemes are proposed: The static speed algorithm derives minimum feasible based stack resource policy. Due to blocking, usually higher than required fully preemptible (called utilization...