A5100412763- Distributed Control Multi-Agent Systems
- Adaptive Control of Nonlinear Systems
- Fluid Dynamics and Vibration Analysis
- Control and Dynamics of Mobile Robots
- Wind Energy Research and Development
- Microgrid Control and Optimization
- Scientific Measurement and Uncertainty Evaluation
- Vibration and Dynamic Analysis
- Wind and Air Flow Studies
- Calibration and Measurement Techniques
- Structural Health Monitoring Techniques
- Robotic Path Planning Algorithms
- Infrastructure Resilience and Vulnerability Analysis
- Power System Reliability and Maintenance
- Risk and Safety Analysis
- Advanced Sensor Technologies Research
- Masonry and Concrete Structural Analysis
- Geotechnical Engineering and Underground Structures
- Lattice Boltzmann Simulation Studies
- Chemical Thermodynamics and Molecular Structure
- Islanding Detection in Power Systems
- Icing and De-icing Technologies
- Vibration Control and Rheological Fluids
- Advanced MEMS and NEMS Technologies
- Traffic control and management
Ocean University of China
2023-2024
Tsinghua–Berkeley Shenzhen Institute
2024
Tsinghua University
2023-2024
Hefei University of Technology
2023
National Institute of Metrology
2023
Wuhan University of Science and Technology
2022-2023
North University of China
2022-2023
Powerchina Huadong Engineering Corporation (China)
2016-2023
Dongguan University of Technology
2023
PowerChina (China)
2023
In this paper, we present a distributed cooperative surrounding control for mobile robots with uncertainties and aperiodic sampling. At the kinematic level, circumnavigation guidance law capability of spatial-temporal decoupling, employing line-of-sight (LOS) principle to accomplish closed orbit following path parameter synchronization assign desired speed, is devised generate reference velocity angular rate. kinetic reduce transmission burden in sensor-to-controller channel compensate total...
This paper investigates a novel GPS-free collaborative elliptical circumnavigation control for multiple non-holonomic vehicles, where two realistic issues — achieving higher efficiency observation and saving the energy expenditures during cooperation are involved. By defining coordinated error relative to neighboring arc length, under premise of accessible global position, cooperative enclosing strategy is derived vehicles connected by digraph enable formation behaviors with uniform forward...
This article proposes a path-following control capable of reinforcing transient performances for networked mobile robots over single curve. By resorting to new coordinated error formulated by projective arc length rather than relative distance, controller consisting an individual steering law and distributed velocity is constructed multiple traveling along common curve, accomplishing queue formation pattern with equal spacing at uniform velocity. Additionally, note that multirobot missions...
Existing cooperative enclosing outcomes are primarily conducted relying on continuous transmission flow among agents, and transient specifications not explicitly incorporated into the design, which may consume a large amount of communication resources violate preset constraints. To address abovementioned issues, by resorting to path-following framework, this article proposes novel control with aperiodic modified guaranteed performance for unmanned vehicles, consisting guidance levels. At...
Main text This is a report to the Consultative Committee for Thermometry (CCT) on key comparison 9 of Standard Platinum Resistance Thermometer (SPRT) calibration International Temperature Scale 1990 (ITS-90) [1] from 83.8058 K (the Ar triple point) 692.677 Zn freezing point). The followed collapsed star protocol, with each fourteen participating laboratories shipping two standard platinum resistance thermometers (SPRTs) as transfer standards pilot laboratory (National Institute Standards and...
Herein, we investigate the temperature compensation for a dual-mass MEMS gyroscope. After introducing and simulating gyroscope’s working modes, propose hybrid algorithm relying on improved complete ensemble empirical mode decomposition with adaptive noise (ICEEMDAN), sample entropy, time–frequency peak filtering, non-dominated sorting genetic algorithm-II (NSGA II) extreme learning machine. Firstly, use ICEEMDAN to decompose output signal, then entropy classify decomposed signals. For...
This article investigates a multi-circular path-following formation control with reinforced transient profiles for nonholonomic vehicles connected by digraph. A controller endowed the feature of spatial-temporal decoupling is devised group guided virtual leader evolving along an implicit path, which allows circumnavigation on multiple circles anticipant angular spacing. In addition, notice that it typically imposes stringent time constraint time-sensitive enclosing scenarios, hence improved...
MEMS accelerometers are significantly impacted by temperature and noise, leading to a considerable compromise in their accuracy. In response this challenge, we propose parallel denoising compensation fusion algorithm for based on RLMD-SE-TFPF GRU-attention. Firstly, utilize robust local mean decomposition (RLMD) decompose the output signal of accelerometer into series product function (PF) signals residual signal. Secondly, employ sample entropy (SE) classify decomposed signals, categorizing...
This article investigates a robust path-following control problem of multiple autonomous vehicles along an implicit elliptical curve. At the kinematic level, by formulating novel coordinated error in terms projective arc length instead relative distance, new distributed guidance law is developed for evolving geometric path, achieving equal separation and uniform forward speed. Based on simple filtering operations upon available states invariant manifold, unknown system dynamics estimators...
In order to improve the energy capture performance of vertical axis lift wind turbines in a low speed environment, drag turbine is employed couple with design existing turbines. contrast literature, this work, computational model proposed that can simulate interaction between and fluid. The effects pitch angle (β), installation (θ), overlap ratio (ε) diameter (DL) on hybrid are systematically analyzed based Taguchi CFD methods. results show under optimized parameter combination, peak...
A novel, inverse-pendulum wave energy converter (NIPWEC) is a device that can achieve natural period control via mass-position-adjusting mechanism and moveable internal mass. Although the capture capacity of NIPWEC has already been proven, it still meaningful to research how effectively in real time for maximum absorption irregular waves. This paper proposes multi-timescale lookup table based power point tracking (MLTB MPPT) strategy NIPWEC. The MLTB MPPT was implemented theoretical “optimal...
To analyze the clinical features, treatment methods and prognosis of radiation-induced sarcoma（RIS） head neck after radiotherapy for nasopharyngeal carcinoma（NPC）, explore its strategies.
Deep-sea mining pipes are different from traditional ocean risers articulated at both ends: they free-suspended, weakly constrained the bottom, and have an intermediate silo end, compared to which relatively little research has been carried out on vortex-induced vibration in pipes. In this study, a sophisticated quasi-3D numerical model with two degrees of freedom for flow field domain structural dynamics deep-sea pipe is developed through novel slicing method. The investigation explores how...
The study proposes a retrofitting method with an optimum design of viscous dampers in order to improve the structural resistant capacity earthquakes. firstly uses 2D frame model and places structure satisfy performance requirements under code-specific earthquake intensities then performs increase collapse-resistant capacity. failure pattern analysis fragility show that leads better than original structure. For regular structures, it is demonstrated damper placement obtained from can be...
In this paper, a novel phase-locked loop less (PLL-less) control method for single-phase grid-connected inverters combining Second-Order Generalized Integrator (SOGI) and Conservative Power Theory (CPT) is proposed, which utilizes the CPT homo integral variable SOGI phase adjustment, thus replacing PLL synchronous of inverter with grid. By establishing impedance model analyzing stability different strategies, it shown that proposed SOGI-CPT-based strategy can effectively improve margin...
Based on the slicing method and overlapping grid method, bidirectional sequential coupling of fluid domain riser structure is realized by UDF programming. A numerical model vortex-solid constructed to study vortex-induced vibration characteristics risers with different velocity ratios oscillation frequencies under effect superimposed oscillating flow. With increase ratio, a higher order formation appeared in transverse envelope riser. Meanwhile, frequency, vertical tube changed from...
Abstract The variable pitching of the blade has a great effect on power extraction vertical axis wind turbine (VAWT). In present study, gear-linkage mechanism is incorporated into design VAWT to achieve passive blade, and amplitude phase difference, performance, are analyzed by combining numerical analysis experimental testing. results show that can effectively improve VAWT’s performance. efficiencies turbine, with optimized 39.01, 25.83 15.78 times higher than those fixed at speeds 3, 6 9...
A bilateral comparison of local realization the International temperature scale 1990 (ITS-90) between National Institute Metrology (NIM) and Centre (NMC) was carried out over range from -190°C to 420°C. It involved six fixed points including argon triple point, mercury point water, melting gallium, freezing tin zinc. In 2009, NMC asked NIM participate in a link results Consultative Committee for Thermometry Key 3 (CCT-K3) facilitate NMC's Calibration measurement capabilities (CMCs)...