Search results for: Liang Diao
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Journal of Asia-Pacific Entomology > 2017 > 20 > 4 > 1419-1424
The oriental fruit moth (OFM), Grapholita molesta (Lepidoptera: Tortricidae), is a serious pest of stone and pome fruit trees worldwide. G. molesta can switch hosts and produce multiple generations per year. Both the primary and secondary host plants of G. molesta emit aldehydes. Here, we tested whether these aldehydes are helpful for host switching of G. molesta. SPME (Solid Phase Microextraction)-GC–MS...
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IEEJ Transactions on Electrical and Electronic Engineering > 12 > 6 > 942 - 951
This paper addresses the control problem of a three‐phase voltage source pulse width modulation rectifier in the presence of parametric uncertainties and external time‐varying disturbances. An adaptive controller is designed by combining a modified dynamic surface control method and a predictor‐based iterative neural network control algorithm. Especially, neural networks with iterative update laws...
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In this paper, an improved control approach for the stand-alone doubly fed induction generator (DFIG) under unbalanced condition is investigated. In unbalanced case, the quality of stator voltage and current of DFIG are badly affected by the negative sequence components, and this will reduce the performance of other normal loads connected to the DFIG. To tackle this problem, a forced stator voltage-oriented...
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2016 Chinese Control and Decision Conference (CCDC) > 6164 - 6168
In this paper, a controller design method is proposed for stand-alone doubly fed induction generator (DFIG). This method is based on forced stator-voltage-oriented vector control principle and active disturbance rejection control (ADRC) approach. Specifically, the forced stator-voltage-oriented vector control principle is used to simplify the mathematics model of stand-alone DFIG and guarantee constant...
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This paper considers the distributed formation tracking of networked marine surface vehicles with model uncertainty and time-varying ocean disturbances induced by wind, waves and ocean currents. The objective is to achieve a collective tracking with a time-varying trajectory, which can only be accessed by a fraction of follower vehicles. Distributed adaptive formation controllers are developed based...
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Journal of Central South University > 2015 > 22 > 7 > 2629-2637
As the ability of a single agent is limited while information and resources in multi-agent systems are distributed, cooperation is necessary for agents to accomplish a complex task. In the open and changeable environment on the Internet, it is of great significance to research a system flexible and capable in dynamic evolution that can find a collaboration method for agents which can be used in dynamic...
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As Agent-based software development methods get more and more attention and Agent-based software system has been used in a variety of occasions, the features and advantages of Agent have been recognized by scholars. However, the runtime environment of Agent is dynamic, open and changeable; runtime in this kind of environment is a big challenge to ensure that the software system can satisfy the user's...
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This paper presents a position sensorless control strategy of stand-alone doubly fed induction machine (DFIM) used for ship shaft generation systems. Direct voltage control method is used to generate constant frequency and voltage with variable load and main engine speed. The strategy does not need any signal from speed, so the position encoder or estimators are unnecessary. The space vector pulse...
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Proceedings of the 33rd Chinese Control Conference > 1214 - 1219
This paper considers the distributed coordinated control problem of multiple autonomous underwater vehicles with a time-varying reference trajectory. Each vehicle is subject to model uncertainty and time-varying ocean disturbances. A new predictor-based neural dynamic surface control design approach is proposed to develop distributed adaptive node controllers, under which synchronization between vehicles...
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Proceedings of the 33rd Chinese Control Conference > 1949 - 1954
In this paper, we consider the problem of synchronized path following for multiple underactuated autonomous underwater vehicles subject to parametric modeling uncertainty and unmodeled dynamics. Nonlinear path following controllers are proposed for individual vehicles that yield convergence of the position tracking errors to a small neighborhood of the origin. Vehicles coordination is reached through...
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This paper considers the coordinated pattern tracking of multiple marine surface vehicles in the presence of uncertain kinematics and kinetics. Distributed pattern tracking controllers depending on the information of neighboring vehicles are derived based on a backstepping technique, neural networks and an identifier. Specifically, the identifier is devised to precisely estimate the time-varying ocean...
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This paper is concerned with the coordinated tracking of linear multi-agent systems with a dynamic leader. The input of the leader is time-varying and cannot be obtained by any follower agents. Distributed iterative learning controllers are developed based on the relative state information of neighboring agents. Lyapunov-Krasovskii functionals are used to show the stability properties of the closed-loop...
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This paper is concerned with the synchronized path following problem of multiple underactuated autonomous underwater vehicles (AUVs) in the presence of uncertain dynamics and input constrains. Nonlinear path following controllers are proposed for individual AUV that yield convergence of the position tracking errors to a small neighborhood of the origin. Vehicles coordination is achieved by synchronizing...
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Unlike the traditional dynamic positioning of single marine surface vessel, a local cooperative control scheme is proposed to achieve the dynamic positioning of multiple offshore vessels and rigs subject to the influence of persistent ocean disturbances through a connected communication network. Cooperative dynamic positioning controllers are developed with the aid of a dynamic surface control technique...
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An adaptive controller is designed for three-phase pulse width modulation (PWM) voltage source rectifier with parametric uncertainties based on the dynamic surface control (DSC) technique. The unknown parameters of the system are estimated by applying the adaptive control method. In addition, the problem of “explosion of complexity” in backstepping design procedure is avoided by using the DSC technique...
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Task allocation and scheduling in MAS systems utilized genetic algorithm is a focus for more and more computer scholars. Aiming at the low speed of typical genetic algorithm, the global convergence for traditional genetic algorithm, and the local convergence for simulated annealing algorithm, this paper proposes a new task allocation algorithm in multiple Agent systems with the advantages of both...
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A detail inhomogeneous multilayer skin model consists of Asian hair is developed. The Asian hair is modeled as a circular cone with basic radius of 100µm, and the Cole-Cole equation is applied for estimating the dielectric properties of hair at 60GHz in the skin model. To simulate the effect of millimeter wave radiation to human body, a radiation source generated by a 60GHz co-planar waveguide (CPW)...
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In this paper, we present and analyze the results of MING-T project, sponsored by EU with partners from several countries in Europe and China. The results include both the field trials and the indoor experiments covering four key technologies developed in the project: reliable data services in broadcast networks, interactive services in broadcast networks, handover between DVB-H and DTMB, scalable...
