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Design and validation of hydraulic pump system driven by the electromotor under the high-power and long-time working state in an airborne

Design and validation of hydraulic pump system driven by the...

引用

IEEE International Conference on Aircraft Utility Systems (AUS)

作者： Huijun Jiang Zhenshui Li Hong Liu Zongxia Jiao Yaoxing Shang Xiaochao Liu Department of Flight Control and Hydraulic System AVIC the First Aircraft Institute Xi'an China School of Automation Science and Electrical Engineering Beihang University Beijing China

ISBN: (纸本)9781509010882

This paper introduced a type of aircraft electric hydraulic pump system working principle, the key points of the system are analyzed and described, including calculation of boost pressure, system oil temperature control design, environmental temperature checking, starting logic design, the system validation and verification methods are expounded. This system passed through the ground test and flight time Validation, and worked well and reliably.

关键词： Oils Aircraft Aerospace control Hydraulic systems Heat transfer Resistance heating

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Integrated Localization System for Autonomous Unmanned Aerial Vehicle Formation Flight

Integrated Localization System for Autonomous Unmanned Aeria...

引用

IEEE International Conference on control and automation

作者： Haibin Duan Qinan Luo Bio-inspired Autonomous Flight Systems (BAFS) Research Group Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University

ISBN: (纸本)9781509017393

This paper presents a formation control framework based on an integrated position sensor system, including two cameras and several inertial sensors, for Unmanned Aerial Vehicles (UAVs) to fly outdoors. A sliding mode controller provides the desired orientation for the UAV to track a desired trajectory. The flight control system takes into account the estimated attitude and position to guide the follower vehicle along trajectories that maintain adequate formation stability. The cameras are employed to detect the relative positions by extracting feature points from specific markers on the UAV. The features are processed to estimate the attitude and position of the follower vehicle. A real-time guidance algorithm is also proposed to merge image measurements with Inertial Measurement Unit (IMU) data for state estimation. The system has been successfully tested in flight experiments, which verify the effectiveness and applicability of the proposed control framework and visual measurement algorithms.

关键词： Feature extraction Mathematical model Sensor systems Trajectory Attitude control Measurement units

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A Binocular Vision-based Measuring System for UAVs Autonomous Aerial Refueling

A Binocular Vision-based Measuring System for UAVs Autonomou...

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IEEE International Conference on control and automation

作者： Yimin Deng Ning Xian Haibin Duan Bio-inspired Autonomous Flight Systems (BAFS) Research Group Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University

ISBN: (纸本)9781509017393

In this paper, we present the systematic design and implementation of a binocular vision-based measuring system for autonomous aerial refueling. The hardware configuration of the verification platform is presented, and vision algorithms including feature extraction and pose estimation are employed for estimating the relation between two rotorcrafts. To verify the autonomous aerial refueling of unmanned aerial vehicles, a binocular vision system and an on-board data processing computer are utilized to provide the real-time pose information. Series of experiments are conducted to demonstrate the feasibility and effectiveness of the overall platform.

关键词： Cameras Receivers Feature extraction Yarn Pose estimation Machine vision Visualization

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Co-Simulation of Field Oriented control in Induction Motor Drive System

Co-Simulation of Field Oriented Control in Induction Motor D...

引用

IEEE Conference on Industrial Electronics and Applications

作者： Bing Hang Qunjing Wang Fang Xie Lei Shi School of Electrical Engineering and Automation Anhui University Hefei China National Engineering Laboratory of Energy-Saving Motor & Control Technology Hefei China Collaborative Innovation Center of Industrial Energy-Saving and Power Quality Control Anhui University Hefei China

ISBN: (纸本)9781467386456

This paper proposes a new modeling method for induction motor (IM) field oriented control (FOC) system based on co-simulation of Maxwell, Simplorer and Simulink. This method uses Ansys/Rmxprt to calculate the initial value and optimize the performance of motor, and puts motor model into Maxwell 2D to make static and transient analysis by finite element method. The circuits of the inverter are built by using the circuit components in Simplorer environment. The FOC control algorithm is built in Simulink environment. The simulation results show the accuracy and practicality of co-simulation modeling method.

关键词： Field oriented control Ansys Simulink Co-simulation Induction motor Accuracy

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A new-style decentralized nonlinear robust coordinated control of multiple static synchronous compensators

A new-style decentralized nonlinear robust coordinated contr...

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第35届中国控制会议

作者： Bangjun Lei Xiang Wu Shumin Fei Electrical Engineering College Guizhou Institute of Technology College of Mathmatics and Computer Science Guizhou Normal University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSchool of Automation Southeast University

ISBN: (纸本)9781509009107

Using the pseudo-generalized Hamiltonian method, this paper investigates the decentralized nonlinear robust coordinated control of multiple static synchronous compensators(STATCOMs) in multi-machine multiload power systems. First,the uncertain nonlinear differential algebraic equation model is constructed for the power system. Then, the dissipative pseudogeneralized Hamiltonian realization of the system is established by means of variable transformation and prefeedback ***, based on the obtained dissipative pseudo-generalized Hamiltonian realization, a new-style decentralized nonlinear robust coordinated controller is put forward. Simulation results demonstrate the effectiveness and robustness of the control scheme.

关键词： Pseudo-generalized Hamiltonian function method Uncertain nonlinear differential algebraic system Multimachine power systems Multiple STATCOMs Decentralized nonlinear robust coordinated control

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Load frequency control participation of wind farms in power systems

Load frequency control participation of wind farms in power ...

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Innovative Smart Grid Technologies (ISGT)

作者： Kailun Fang Wei Zhang Xuefeng Bai Ying Xu School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China North China Branch of State Grid Power Dispatch and Control Center Beijing China

ISBN: (纸本)9781509051687

High penetration of wind generation into power system may jeopardize the operation of the system without proper frequency control methodologies. This paper proposed a coordination control strategy enabling wind farms to participate in the load frequency control of the power system. The proposed strategy utilizes the deloading of wind generators to reserve active power to engage in frequency control. It is proved to be stable, and can achieve fast response under operating condition changes while avoiding frequent regulation of wind generators' pitch angles. The simulation studies verify the effectiveness of the proposed method.

关键词： Indexes Mathematical model MATLAB Frequency control Smart grids

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The Euler's discretization effect on sliding mode control of perturbed double integrator

The Euler's discretization effect on sliding mode control of...

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International Workshop on Variable Structure Systems, VSS

作者： Yan Yan Chaoli Wang Xinghuo Yu Changyin Sun School of Automation Southeast University Nanjing Jiangsu China Control Science and Engineering Department University of Shanghai for Science and Technology Shanghai China School of Electrical and Computer Engineering RMIT University Melbourne VIC Australia

This paper addresses the problem of sliding mode control (SMC) for the perturbed double integrator system. First, the stability conditions of the continuous-time system is analyzed. Moreover, the Euler's discretization of the perturbed double integrator under SMC is introduced and the upper bounds of the discretized system steady states are established. Simulations are presented to illustrate the theoretical results.

关键词： Variable structure systems integrators Continuous time systems SELECTION AND MONITORING CHASSIS Small Magellanic Cloud Sheet molding compounds Discretization Upper bound DOUBLE time system simulating

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Identifying equivalent load model of power systems with wind power integration

Identifying equivalent load model of power systems with wind...

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UKACC International Conference on control (control)

作者： Zi Zhu Xuefeng Bai Wei Zhang Ruiye Liu Ying Xu School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China North China Branch of State Grid Power Dispatch and Control Center Beijing China

With a large number of wind farms integrated into power systems, the load characteristics of the power systems will vary, resulting in the inapplicability of the traditional load model. Thus, it is of great importance to describe the load characteristics of power systems by taking the impact of the integration of the wind power into consideration. This paper first discusses the influence of wind power integration on the original load model. Wind speed, which has the most direct impact on the output of the wind turbine, is introduced as a new variable for load modelling. By combing the voltage variation of the system, a static equivalent load model is proposed in this paper, wherein, the structure of the proposed load model is also discussed. Measurement-based load Modelling with large amount of measurements requires to process a large number of measured data. This paper utilizes the density based clustering algorithm (DBSCAN) to mine the core data, and reconstructs the surface of the load characteristic based on the mined core data. A static equivalent load model with wind power integration is then established. Compared with the model that is modeled directly without data processing, the proposed load model is more accurate.

关键词： Load modeling Wind speed Wind power generation Data models Analytical models Voltage measurement Surface fitting

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Robust H_∞ control for spacecraft formation flying with coupled translational and rotation dynamics

Robust H_∞ control for spacecraft formation flying with cou...

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American control Conference

作者： Yi Huang Yingmin Jia Fumitoshi Matsuno Seventh Research Division and the Center for Information and Control School of Automation Science and Electrical Engineering Beihang University (BUAA) Beijing 100191 China Department of Mechanical Engineering and Science Kyoto University 606-8501 Japan

ISBN: (纸本)9781467386838

In this paper, the problem on robust H_∞ control for 6-DOF spacecraft formation flying in the presence of parameter uncertainties and external disturbances is addressed. Firstly, the model of coupled translation and rotation motion of spacecraft formation is established. Subsequently, a robust H_∞ controller is proposed, which is constructed by the solution to the Hamilton-Jacobi-Inequality (HJI). It is proved that the 6-DOF coupled system is asymptotically stable and robust in respect to parameter uncertainties, and the H_∞ norm between external disturbances and regulated output is ensured to be no more than a prescribed attenuation level. Since it is hard to solve the HJI analytically, a modified θ-D method is proposed, which is an effective approach to find an approximate solution to the HJI. It is illustrated that the modified θ-D method is feasible and convenient to implement onboard in the practical situation. Finally, numerical simulations are performed to demonstrate the effectiveness of the robust H_∞ controller based on the modified θ-D method.

关键词： Space vehicles Robustness Uncertain systems Orbits Nonlinear systems Linear matrix inequalities Mathematical model Formation flight Space vehicles uncertain systems linear matrix inequalities parameter uncertainty Eye Sockets Orbits Nonlinear systems Mathematical Model Robustness external disturbance Standing Orders Spacecraft Robust h-infinity control controllers

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A smooth changeover method of the hybrid control strategy for five-level active NPC converter

A smooth changeover method of the hybrid control strategy fo...

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IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

作者： Cungang Hu Qunjing Wang Guoli Li Hu Jun Fanglin Luo Ministry of Education Engineering Research Center of Power Quality Hefei China National Engineering Laboratory of Energy-Saving Motor & Control Technology Hefei China School of Electrical Engineering and Automation Anhui University Hefei China Anhui University Hefei Anhui CN School of Electrical and Electronic Engineering Nanyang Technological University Singapore

ISBN: (纸本)9781467386180

Pulse-width-modulation (PWM) method is a crucial technique to construct multilevel converter. A hybrid PWM combining the merits of both space vector PWM (SVPWM) and selective harmonic elimination PWM (SHEPWM) is proposed for the five-level active neutral-point clamped converter. SVPWM can lead to high DC voltage utilization and low ripple current at low frequency band. SHEPWM can eliminate specific low-order harmonics at high frequency band. After implementing SHEPWM, the remaining high-order harmonics can be easily eliminated by the designed filter. Large vibration usually happens to the changeover of two modulation methods. A control strategy is proposed in this paper to implement the smooth changeover between SHEPWM and SVPWM at any time. The simulation and experimental results are provided to verify the effectiveness of this control strategy.

关键词： Space vector pulse width modulation Switches Power harmonic filters Harmonic analysis Switching frequency

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