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检索条件"机构=Science and Technology On Aircraft Control Laboratory"

共 1293 条记录，以下是671-680 订阅

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Optimal Observation Configuration Method for Multi-UAV Distributed Cooperative Target Tracking

Optimal Observation Configuration Method for Multi-UAV Distr...

引用

IEEE Chinese Guidance, Navigation and control Conference (CGNCC)

作者： Zhuoning Dong Yemo Liu Science and Technology on Aircraft Control Laboratory Beihang University Beijing China School of Automation Science and Electrical Engineering Beihang University Beijing China

ISBN: (数字)9781538611715

ISBN: (纸本)9781538611722

Propose an optimal configuration method for multi-UAV distributed cooperative tracking control based on information theory, and solve the coupled problem of information fusion and tracking control, optimize the gain of cooperative observation information by controlling multi-UAV motion, prove stability of the coupled fusion-control system and give the sufficient and necessary conditions for the observation configuration system to converge.

关键词： Target tracking Filtering Motion control Collaboration State estimation

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Sigmiod based anti-disturbances trajectory tracking for quadrotor UAV under gyroscope noise

Sigmiod based anti-disturbances trajectory tracking for quad...

引用

IEEE Chinese Guidance, Navigation and control Conference (CGNCC)

作者： Zhan Kou Honglun Wang Zikang Su School of Automation Science and Electrical Engineering Beihang University Beijing China Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

ISBN: (数字)9781538611715

ISBN: (纸本)9781538611722

In this paper, a Sigmiod based anti-disturbances trajectory tracking controller is developed to cope with the trajectory tracking problem of the quadrotor under external disturbances, model uncertainties and gyroscope noise. Firstly, the accurate nonlinear dynamic model of quadrotor UAV is established. Then, based on the hierarchical control principle, the trajectory tracking controller is designed as position loop and attitude loop respectively, each loop constructs the corresponding controller by feedback linearization. In addition, the high-order sigmoid tracking differentiator (STD) is developed to generate the required differential signal and arrange expected transition process, synchronously, the sigmoid disturbance observer (SDO) with the same frame as the STD is applied to reconstruct the lump disturbances of the attitude loop and the position loop. At last, the simulation results demonstrate that the proposed controller not only ensures small tracking error and strong noise suppression, but also simplifies the structure of controller and make it easy to adjust controller parameters.

关键词： Trajectory tracking Attitude control Disturbance observers Uncertainty Rotors Tracking loops

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The Unidirectional Auxiliary Surface Sliding Mode control for Compound High-speed Helicopter

The Unidirectional Auxiliary Surface Sliding Mode Control fo...

引用

IEEE Chinese Guidance, Navigation and control Conference (CGNCC)

作者： Yan Cao Yin Wang Hongyi Song Qiang Li Hui Zhang college of astronautics Nanjing University of Aeronautics and Astronautics Nanjing China Science and Technology on Aircraft Control Laboratory FACRI Xi’an China

ISBN: (数字)9781538611715

ISBN: (纸本)9781538611722

By the introduction of advancing blade concept rotor system, the compound high-speed helicopters become a hot research topic in recent years. Due to the novel coaxial rotor and propeller structure of the compound helicopter, the aerodynamic coupling effect between the coaxial rotor and the fuselage has strong influence to the overall performance of the helicopter at low flying speed. In order to accommodate this problem, this paper presents a novel{unidirectional auxiliary surface sliding mode control method for the attitude control of compound helicopters. In the proposed work, the flight dynamics of the novel structured compound helicopter are firstly introduced. Then, expanding the positive invariant sets with 6 unidirectional auxiliary surfaces and an exponential approaching law and a terminal attractor are incorporated into the framework so as to increase the convergence speed and ensure the state error converges within finite time. The stability of the newly developed algorithm is analyzed through the Lyapunov approach. Comparative simulation results have demonstrated that the proposed method is capable of tracking attitude commands and shown strong robustness to the uncertainties.

关键词： Helicopters Compounds Rotors Aerodynamics Sliding mode control Switches Propellers

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Rotor Position Estimation of Sensorless PMSM Based on Extented Kalman Filter

Rotor Position Estimation of Sensorless PMSM Based on Extent...

引用

IEEE International Conference on Mechatronics, Robotics and Automation (ICMRA)

作者： Gao Tian Yang Yan Wang Jun Zhou Yu Ru Zhao Xiao Peng School of Electronic and Information Northwestern Polytechnical University Xi'an China Science and Technology on Aircraft Control Laboratory FACRI Xi'an China

Taking permanent magnet synchronous motor as the research object, a rotor position estimation algorithm based on extended Kalman filter algorithm is proposed. According to this algorithm, the PMSM control system can estimate the position and speed of the rotor on line by measuring the phase current of the motor winding to realize the space vector control of the sensorless permanent magnet synchronous motor. The simulation model of permanent magnet synchronous motor is established, and the feasibility of the algorithm is verified. Finally, the algorithm is implemented on the experimental platform of the motor control system. The experimental results show that the algorithm proposed in this paper can estimate rotor position and speed in real time and high accuracy. This algorithm is used for space vector control with wide speed range and stable operation of motor control system.

关键词： Rotors Permanent magnet motors Synchronous motors Mathematical model Estimation Machine vector control Sensorless control

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Sampled-Data control With Space-Varying Gain for Linear Distributed Parameter Systems

Sampled-Data Control With Space-Varying Gain for Linear Dist...

引用

Chinese Automation Congress (CAC)

作者： Zi-Peng Wang Huai-Ning Wu Xiaohong Wang School of Electrical Engineering University of Jinan Jinan China Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

This paper introduces a sampled-data control (SDC) with space-varying gain for linear distributed parameter systems (DPSs) described by parabolic partial differential equations (PDEs). A SDC design with space-varying gain is developed in the formulation of space-dependent linear matrix inequalities (LMIs) by using an appropriate Lyapunov functional, which can stabilize exponentially the DPSs. Finally, a numerical example is offered to support the proposed approach.

关键词： Distributed parameter systems Numerical models Process control Aerospace electronics Electrical engineering Gain aircraft

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A New Robust Fault-tolerant control Strategy for aircraft with Asymmetric Structure Damage 36

A New Robust Fault-tolerant Control Strategy for Aircraft wi...

引用

第36届中国控制会议

作者： Pianpian Zuo Ke Yi Qingdong Li Xiwang Dong Zhang Ren School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control LaboratoryBeihang University System Engineering Research Institute

ISBN: (纸本)9781538629185

This paper focuses on the control problem of the aircraft with asymmetric structure *** contribution of this study is to present a new robust fault-tolerant control strategy based on nonlinear extended state observer and nonlinear dynamic inverse,which well balances the system performance and the tolerance of ***,the dynamic model of the aircraft with asymmetric structure damage is built adopting micro-element ***,the damaged aircraft control problem can be transformed into the problem of the suppression and adaptation of uncertain ***,simulations are carried on to demonstrated the control law based on the proposed strategy with NASA Generic Transport *** show that the aircraft tracks the control commands quickly and accurately and the flight performance is well ensured after asymmetric structure damage occurring.

关键词： asymmetric structure damage robust fault-tolerant control extended state observer dynamic inverse control

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Vision-inertia Virtual Glasses Relative Attitude Estimate within a Rotation Free Cabin

Vision-inertia Virtual Glasses Relative Attitude Estimate wi...

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第三届机电控制技术与交通运输国际学术会议

作者： Keqiang Wu Hai Zhang Youze Mao School of Automation Science and Electrical Engineering Beihang University Science and Technology on Aircraft Control Laboratory Beihang University Beijing Institute of Electronic System Engineering

This paper presents a visual and inertial measurements fusion scheme to estimate the relative attitude when the cabin and the virtual glasses in it are both free to move. A Euler angle filter is designed when the cabin rotation rate can be provided with high frequency. Another orientation error filter is developed when only the cabin attitude can be obtained. Both of these algorithms are based on low cost MEMS inertial measurement unit, experiment has proved that the relative attitude can be fast and accurately estimated. The main advantages are the measurement noise can be well suppressed and the relative attitude estimation can be continuous even though the glasses are invisible to the optical tracking system.

关键词： Inertial measurement unit Optical tracking system Fusion Relative attitude Virtual reality

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Finite Element Analysis of A new Multi-DOF Flexible Micro-Displacement Manipulator Based on Ferrofluid

Finite Element Analysis of A new Multi-DOF Flexible Micro-Di...

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IEEE/ASME International Conference on Advanced Intelligent Mechatronics

作者： Chunfang Li Shuai Wu Bo Yu Zongxia Jiao With faculty of School of Automation Science and electrical Engineering Beihang University Beijing China Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

This paper presents a new multi-DOF flexible micro-displacement manipulator based on ferrofluid for high precision micro-displacement manipulation. It is aimed at achieving a flexible, smooth and precise control of multiple degrees of freedom micro-displacement by utilizing controlled ferrofluid. The mover of the proposed manipulator is suspended on the ferrofluid affected by the combined magnetic field coupled by a permanent magnetic field and a controlled electromagnetic field. Then the proposed manipulator can be manipulated by changing the strength of the combined magnetic field, which is adjusted by the input current. In addition, the proposed manipulator also can effectively eliminate the disturbance to the micro-operation caused by vibration during operation since the mover is totally supported by ferrofluid. The finite element analysis is also performed to observe the magnetic field intensity changes in ferrofluid with different excitation current, which verifies the rationality and feasibility of the proposed manipulators. Consequently, the proposed manipulator has a significant potential for applications where the high precision micro-displacement manipulation, such as microinjection system.

关键词： Manipulators Actuators Magnetic levitation Iron Force Windings Ferrofluid

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An Unmanned Aerial Vehicles Collaborative Searching and Tracking Scheme in Three-Dimension Space

An Unmanned Aerial Vehicles Collaborative Searching and Trac...

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IEEE International Conference on Cyber technology in Automation, control, and Intelligent Systems

作者： Fan Guo Mingzhu Wei Mingfei Ye Jiajun Li Omar Mechali Yong Cao School of Astronautics and Aeronautics University of Electronic Science and Technology of China Chengdu Sichuan China School of Astronautics and Aeronautics UESTC Chengdu Sichuan China Ecole Superieure Ali Chabati (ESDAT) Reghaia Algiers Algeria Aircraft swarm intelligent sensing and cooperative control Key Laboratory of Sichuan Province School of Aeronautics and Astronautics University of Electronic and Technology of China Chengdu China

ISBN: (数字)9781728107707

ISBN: (纸本)9781728107714

This paper proposes a multi-UAVs collaborative search scheme to realize target search in minimal time. We set up a three-dimension continuous `8'-shape trajectory model, simplify the camera model and propose the method of target detection. It combines the zigzag search strategy with genetic algorithm to optimal the search step and reduce the search time. In this method, UAVs always keep a fixed-formation during searching and tracking. Our algorithm was validated by simulations and gets results that meet the needs of the challenges in the 2020 Mohamed Bin Zayed International Robot Challenge.

关键词： Drones Sociology Statistics Trajectory Cameras Genetic algorithms Shape

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An Adaptive Energy Saving Scheme of DTN based on Geographic Grid for Human Living Areas

An Adaptive Energy Saving Scheme of DTN based on Geographic ...

引用

IEEE Information technology and Mechatronics Engineering Conference (ITOEC)

作者： Tingwei Fu Zhan Wen Jianwei Liu Zheng Zheng Wenzao Li School of Communication Engineering Chengdu University of Information Technology Chengdu Sichuan China Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

ISBN: (纸本)9781538653746

Delay Tolerant Network (DTN) is playing a pivotal role in the future human living areas, especially in the future development of smart cities. In the future smart cities, the available energy resources are very limited. In this condition, the intelligent transmission is required as soon as possible, to achieve the goal of saving energy resources. At present, most of the researches focus on optimizing the transmission unit or routing algorithm for prolonging the network life time. There is no good adaptive energy saving scheme according to urban environmental rules. In this paper, an energy protection mechanism under human encounter characteristics is proposed in terms of AESS (Adaptive Energy Saving Scheme based on geographic grid) approach, which can be applied to various DTN routing protocols such as Epidemic, Prophet, ADAF etc. According to the rules in the urban scenarios, nodes can sleep dynamically to save energy. Simulation results verify the performance of proposed AESS which is used in Epidemic, Prophet and ADAF , under an urban scenario, are better than the corresponding original algorithm in delivery ratio, network overhead ratio and energy consumption status.

关键词： Urban areas Routing Heuristic algorithms Energy consumption Energy resources Wavelength division multiplexing Simulation

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