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42nd Chinese control Conference, CCC 2023

作者： Tang, Xiangyu Yu, Jianglong Peng, Siting Dong, Xiwang Li, Qingdong Ren, Zhang School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China Institute of Artificial Intelligence Beihang University Beijing100191 China Beijing Electro-Mechanical Engineering Institute Beijing100074 China

ISBN: (纸本)9789887581543

This paper studies the impact angle control guidance problem with general field-of-view (FOV) constraints for a moving target. Firstly, the control Lyapunov function (CLF) is constructed based on the state-dependent Riccati equation (SDRE) technique, and a nominal controller is designed to intercept the moving target at the desired impact angle without FOV constraints. The control barrier functions (CBFs) are designed according to the FOV constraints. Secondly, the CLF that guarantees stability is combined with the CBFs that guarantee forward invariance of the constraint sets. The minimum modification framework is used to numerically solve the guidance command through quadratic programming to ensure that the look angle of the missile always remains within the constraint interval during the interception process. Finally, the effectiveness of the proposed guidance law is verified by numerical examples. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Electronic guidance systems

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Improved Auction Algorithm for Weapon Target Assignment with Firepower-Health Model 42

Improved Auction Algorithm for Weapon Target Assignment with...

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42nd Chinese control Conference, CCC 2023

作者： Wang, Shuobo Heng, Yong Hua, Yongzhao Dong, Xiwang Ren, Zhang Institute of Artificial Intelligence Beihang University Beijing100191 China Beijing Institute of Electronic System Engineering Beijing100854 China School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China

ISBN: (纸本)9789887581543

This paper proposes an improved auction algorithm to optimize the efficiency of dynamic weapon target assignment (WTA) problem. Firstly, the dynamic battlefield environment of firepower-health model is analyzed and the constraints of weapon assignment problem are established. The firepower-health model is about the idea of adding constraints of weapon firepower and target health to promote the result of assignment more effectively. Secondly, in order to improve the computing speed of WTA algorithm, the penalty mechanism is introduced in the compensation auction algorithm. The main idea of improved algorithm is to reduce the extra consuming of the weapon during the assignment, from which penalty mechanism can optimize the assignment results and reduce the number of algorithm iterations by punishing the overkilled target under certain rules. Finally, the simulation results based on the dynamic firepower-health model show that the proposed algorithm can meet the requirements of firepower allocation, and can promote the effectiveness of assignment with high real-time response. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Dynamics

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Preshaping trajectory optimization and control of flexible hypersonic vehicle for vibration suppression

Preshaping trajectory optimization and control of flexible h...

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第42届中国控制会议

作者： Yifang Tang Chaofang Hu Yongtai Hu School of Electrical and Information Tianjin University Aviation Key Laboratory of Science and Technology on Aircraft Control

Considering the special structural design and complex working conditions of flexible hypersonic vehicles, elastic vibrations can tremendously affect the control performance of hypersonic vehicles. In this paper, from the perspective of trajectory,a vibration suppression strategy for hypersonic vehicle including trajectory optimization and input shaping is proposed. The minimum sum of the squares of elastic modes and derivatives is selected as the performance index, and the optimal trajectory is calculated through direct collocation method. Then, an input shaper is designed for the first-order elastic mode to reshape the optimal trajectory. Meanwhile, the Tube model predictive control(Tube-MPC) is utilized to ensure the stable flight of the vehicle. Finally, the simulation results demonstrate the effectiveness of the proposed method.

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A Novel Three-DOF Transverse Flux Spherical Actuator With Decoupling Mechanism

A Novel Three-DOF Transverse Flux Spherical Actuator With De...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Xiaoshuai Liu Liang Yan Pengjie Xiang Xinghua He Nannan Du Chong Wu School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

This paper proposes a novel multi-DOF spherical actuator based on transverse flux and three-DOF decoupling mechanism. Firstly, the structure and working principle of the new multi-DOF spherical actuator are presented. Then, numerical simulations are performed to analyze its magnetic field and torque, resulting in the basic performance curve of the spherical motor. Finally, The structure of this spherical actuator is optimized by numerical simulation. The optimization results show that the performance of the optimized spherical actuator has been effectively improved in terms of torque ripple, output torque and control precision.

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A Spoke-Type PM Machine with Quasi-Trapezoid Magnets and Quasi-Dovetail Iron Poles

A Spoke-Type PM Machine with Quasi-Trapezoid Magnets and Qua...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Pengjie Xiang Yan Liang Xinghua He Xiaoshuai Liu Nannan Du Xuxu Yang School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

This paper proposes a spoke-type PM machine with quasi-trapezoid magnets and quasi-dovetail iron poles (SPM-QMQI). The SPM-QMQI can offer several merits. First, the employment of quasi-trapezoid magnet and iron pole help to achieve strong flux-focusing effect and high saliency ratio, respectively, which contributes to enhancing torque output of the SPM-QMQI machine. Second, the quasi-dovetail iron can enhance flux-shielding effect and thus the rotor yoke can be replayed with low-density non-ferromagnetic material contributing to reducing rotor mass. Besides, the dovetail-shaped iron pole can protect the rotor magnet against centrifugal force, and thus the conventional rotor sleeve can be removed contributing to a small airgap length. Third, the magnet usage efficiency of electrical machine can be increased greatly, because of the magnet volume reduction and torque improvement. First, the schematic structure and characteristics of proposed QMQI pole pattern are presented. Subsequently, the impact of the key structural parameters and current angle of the QMQI pole pattern on the output characteristics of the electrical machine is investigated. Following that, the electromagnetic characteristics of the proposed QMQI pole design, such as airgap magnetic field, back electromotive force, torque output and ripple, magnet loss, rotor mass and magnet utilization ratio, are compared with with those of the conventional electric machine design to confirm the merits of the proposed SPM-QMQI design. The SPM-QMQI machine have high torque output, low rotor mass and small magnet volume simultaneously, which is desirable for many industrial applications.

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Multi-model Tube-MPC Fault-tolerant control for Flexible Hypersonic Vehicle 11

Multi-model Tube-MPC Fault-tolerant Control for Flexible Hyp...

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11th IEEE Data Driven control and Learning Systems Conference, DDCLS 2022

作者： Mi, Hanpeng Hu, Chaofang Yang, Xiaohe Hu, Yongtai School of Electrical and Information Engineering Tianjin University Tianjin300072 China Aviation Key Laboratory of Science and Technology on Aircraft Control Facri Xi'an710065 China

ISBN: (数字)9781665496759

ISBN: (纸本)9781665496759

For the large flight envelope and high maneuverability of flexible hypersonic vehicle, a Tube-Mpc fault tolerant control strategy based on multiple models is presented. First, the flight area is divided into subspaces. In each subspace, a control-oriented linearized submodel is constructed using the Jacobian linearization method, and fault and parameter uncertainties are included in the additional disturbance terms. Then, a fault-tolerant controller based on Tube-MPC is designed for the submodel to achieve the stability control of the aircraft in the local range. Finally, each submodel controller is weighted by an appropriate multi-model weighting strategy to obtain the final control law. This strategy ensures the stable flight of the flexible hypersonic vehicle in the failure state throughout the flight envelope. The simulation results show that the proposed control method is effective. © 2022 IEEE.

关键词： Hypersonic vehicles

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Design of a Reconfigurable Bandnotch Antenna for UWB Applications

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Progress In Electromagnetics Research C 2022年 127卷 101-112页

作者： Jing, Hua He, Ge Sun, Jiahao Wang, Shengyao School of Aeronautics and Astronautics University of Electronic Science and Technology of China Chengdu China Institute of Electronic and Information Engineering of UESTC in Guangdong Dongguan China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu China

—In order to improve the practicability and versatility of ultra-wideband (UWB) antennas, a reconfigurable band notch antenna is proposed in this paper. It has a compact size of 18 mm × 16 mm × 1.6 mm. The reconfigurable band notch function is realized by two small tunable units. The tunable unit makes up of a split ring resonator (SRR), a dielectric substrate, and a varactor diode. The simulation results show that the antenna combines the functions of band notch emergence, removal, and movement. The applied reconfigurable method can effectively broaden the continuous movement range of band notch. The measurement proves that the antenna has the band notch reconfigurable function, and the measured results are in good agreement with the simulation ones. The radiation patterns are measured, which are stable and consistent under two modes with and without band notch, showing omnidirectional radiation characteristics. These research results provide reference value for the design of band notch UWB antenna shielding civil narrowband communication band. © 2022, Electromagnetics Academy. All rights reserved.

关键词： Ultra-wideband (UWB)

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Hypersonic Vehicle Tube-MPC Fault-Tolerant control Method Based on Multi-objective Trajectory Optimization 18th

Hypersonic Vehicle Tube-MPC Fault-Tolerant Control Method Ba...

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18th Chinese Intelligent Systems Conference, CISC 2022

ISBN: (纸本)9789811962028

In order to reduce the complexity of controller design and improve the real-time performance of control, a hypersonic vehicle Tube-MPC fault-tolerant control method based on multi-objective trajectory optimization is proposed. For the maneuver trajectory tracking problem under actuator saturation and fault, the flight structure is divided into two layers: reference trajectory re-planning and fault-tolerant control. In the upper layer - trajectory reprogramming layer, in order to make the aircraft successfully complete the long-span maneuver task and reduce the computational burden of the control layer, combined with the dynamic characteristics of the aircraft, as well as the state and control input constraints, the multi-objective online trajectory optimization method based on fuzzy satisfaction order is studied, and the maneuver command is reprogrammed online. In the lower fault-tolerant control layer, a fault-tolerant controller based on Tube-MPC is designed to ensure the stability of the control system. Finally, the effectiveness of the proposed method is verified by simulation. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Hypersonic vehicles

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Fault tolerant control on single phase open circuit fault for dual-three phase PMSM

Fault tolerant control on single phase open circuit fault fo...

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2022 CSAA/IET International Conference on aircraft Utility Systems, AUS 2022

作者： Wei, Xiaocheng Yan, Liang Zhang, Lu Jin, Zijian Wang, Jin Su, Hang Quan, Xiao Ningbo Institute of Technology Beihang University Ningbo China School of Automation Science and Electrical Engineering Beihang University Beijing China Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

The dual three-phase motor can ensure the continuous operation of the motor under the condition of single-phase open circuit. This paper will mainly focus on exploring the fault handling and operation methods of dual three-phase motor under the condition of single-phase open circuit. Based on the analysis of motor fault operation, this paper proposes an average current detection method based on threshold judgment. Through this method, the single-phase open circuit fault can be detected and processed within 2 cycles, which allow system to handle the fault rapidly and reduce the impact of the fault, thus the reliability and operation stability of the motor drive system can be improved. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Fault detection

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ROBOTIC ARM TRAJECTORY TRACKING control BASED ON RBF NEURAL NETWORK ESTIMATION OF DYNAMIC PARAMETERS

ROBOTIC ARM TRAJECTORY TRACKING CONTROL BASED ON RBF NEURAL ...

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2024 CSAA/IET International Conference on aircraft Utility Systems, AUS 2024

作者： Du, Nannan Yan, Liang Wang, Tiantian Bu, Suwan Gerada, Chris Liu, Xiaoshuai Yang, Xuxu Li, Haien School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Ningbo Institute of Technology Beihang University Ningbo315800 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China Tianmushan Laboratory Beihang University Hangzhou310023 China Department of Electrical and Electronic Engineering University of Nottingham NottinghamNG7 2RD United Kingdom

In robotic arm operations, after planning the desired motion trajectory, accurate and stable trajectory tracking control is essential. However, in actual control, there are issues such as the uncertainty of the dynamic parameters and susceptibility to external disturbances during motion. Addressing these issues, this paper employs RBF neural networks to estimate dynamic parameters and utilizes an adaptive controller to achieve online trajectory tracking. The dynamic approximation capability and adaptability of this method enhance the real-time performance and disturbance rejection of robotic arm trajectory tracking control. Finally, the availability of this method is verified by experiments in the simulation environment. © The Institution of Engineering & technology 2024.

关键词： Disturbance rejection

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