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Model Predictive yaw control Using Fuzzy-Deduced Weighting Factor for Large-Scale Wind Turbines

Energy Engineering 2021年第2期118卷 237-250页

作者： Shuowang Zhang Lingxiang Huang Dongran Song Ke Xu Xuebing Yang Xiaoping Song XEMC Wind power Co. Ltd.Xiangtan411100China School of Automation Central South UniversityChangsha410083China

yaw control system plays an important role in helping large-scale horizontal wind turbines capture the wind *** track the stochastic and fast-changing wind direction,the nacelle is rotated by the yaw control ***,a difficulty consists in the variation speed of the wind direction much faster than the rotation speed of the *** deal with this difficulty,model predictive control has been recently proposed in the literature,in which the previewed wind direction is employed into the predictive model,and the estimated captured energy and yaw actuator usage are two contradictive *** the performance of the model predictive control strat-egy relies largely on the weighting factor that is designed to balance the two objectives,the weighting factor should be carefully *** this study,a fuzzy-deduced scheme is proposed to derive the weighting factor of the mod-el predictive yaw *** the proposed fuzzy-deduced strategy,the variation degree and the increment of the wind direction during the predictive horizon are used as the inputs,and the weighting factor is the output,which is dynamically *** proposed model predictive yaw control is demonstrated by some simulations using real wind data and its performance is compared with the conventional model predictive control with thefixed weighting *** results confirm the outweighing performance of the proposed control strategy over the conventional one.

关键词： Wind turbine yaw control weighting factor fuzzy logic control

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Design of yaw controller for a Small Unmanned Helicopter Based on Improved ADRC

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Guidance, Navigation and control 2021年第4期1卷 7-25页

作者： Linjie Huang Hailong Pei Key Laboratory of Autonomous Systems and Networked control Ministry of EducationUnmanned Aerial Vehicle Systems Engineering and Technology Research Center of GuangdongSouth China University of TechnologyGuangzhou 510640P.R.China

yaw control is signi¯cant to the attitude control of small unmanned helicopters(SUHs).Since the existing robust control method cannot be applied to the SUH with unknown dynamics and disturbances,this paper proposes an improved active disturbance rejection control(IADRC)to solve the *** IADRC obtains the optimal solution of the actuator gain(b0)by gradient ***,this paper summarizes some experiences during the tuning process of ADRC,which signi¯cantly reduces the di±culty of designing ***,the experimental results show that the proposed method is better than the traditional PID in robust and tracking control performance.

关键词： yaw control small unmanned helicopter active disturbance rejection control gradient descent

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Novel yaw effector of a flying wing aircraft based on reverse dual synthetic jets

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Chinese Journal of Aeronautics 2023年第12期36卷 151-163页

作者： Zhijie ZHAO Zhenbing LUO Xiong DENG Jianyuan ZHANG Zhaofeng DONG Jiefu LIU Shiqing LI College of Aeronautics and Astronautics National University of Defense TechnologyChangsha 410073China

For achieving the nice stealth performance and aerodynamic maneuverability of a Flying Wing Aircraft(FWA),a novel yaw effector based on Reverse Dual Synthetic Jets(RDSJ)was proposed without the movement of *** on aerodynamic characteristics of a small-sweep FWA and control mechanism were investigated by numerical ***,reverse dual synthetic jet actuators were integrated into a real FWA and flight tests were firstly carried *** results show that RDSJ could make drag coefficient increase and weaken lift coefficient,which generate a yawing moment and a rolling moment in the same direction,realizing control of heading attitudes,but strong coupling with the pitching moment occurs at large angles of *** control mechanism,RDSJ could produce two reverse synthetic jets out of phases,improve the reverse pressure gradient and hence form alternate recirculation zones or even early large-area separation,which cause the rise of pressures before exits and the dip of pressures behind exits,achieving improvement of drag and the yawing *** results of flight tests support that RDSJ could realize control of heading attitudes without deflections of rudders during the cruise stage and achieve the maximal yaw angular velocity of 10.12(°)/s,verifying the feasibility of this novel yaw effector.

关键词： control mechanism Dual synthetic jets Flight tests Flying wing aircraft yaw control

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A Nonlinear Semiactive Rear Differential control in Rear Wheel Drive Vehicles

A Nonlinear Semiactive Rear Differential Control in Rear Whe...

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第二十六届中国控制会议

作者： Riccardo Marino Scalzi Stefano Cinili Fabio University of Rome Tor Vergata Electronic Engineering DepartmentVia del Politecnico 100133 Roma - Italy University of Rome Tor Vergata Electronic Engineering Department

Many vehicle control systems are based on the yaw rate error to help the driver during oversteer and understeer con- *** control systems usually operate on brake pressures distributions such as ESP and/or on active steering control （front and rear steering control）.The main contribution of this paper is to show that vehicle dynamic performance can be improved by an electronically controlled semiactive rear differential which is based on yaw rate and rear wheel speed measurements.A nonlinear first order reference model for the yaw rate and for the rear wheels speed difference dynamics driven by the driver steering wheel input is *** controlled system shows new stable cornering manoeuvres and enlarged stability regions;moreover safety is increased in emergency conditions in which the driver does not react to a sudden external disturbance,since the regions of attraction are enlarged by *** activation of the control law is based on Lyapunov *** simulations are carried out on a standard small SUV CarSim car model to confirm the analysis and to explore the robustness with respect to unmodelled dynamics such pitch,roll and nonlinear combined lateral and longitudinal tire forces according to combined slip theory.

关键词： Vehicle Dynamics control System Semi Active Differential yaw control

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