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Nanocellulose-Derived Hierarchical Carbon Framework-Supported P-Doped MoO2Nanoparticles for Optimizing Redox Kinetics in Lithium–Sulfur Batteries (Adv. Mater. 22/2025)

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Advanced Materials 2025年第22期37卷

作者： Mengjiao Shi Xue Han Wen Qu Meihui Jiang Qing Li Feng Jiang Xiang Xu Shinsuke Ifuku Chunlei Zhang Chao Wang Junfeng Hu Liansheng Yang Yuanjun Lin Haipeng Yu Shouxin Liu Jian Li Yiqiang Wu Wenshuai Chen Key Laboratory of Bio-Based Material Science and Technology of the Ministry of Education Northeast Forestry University Harbin 150040 P. R. China Sustainable Functional Biomaterials Lab Department of Wood Science University of British Columbia Vancouver BC V6T 1Z4 Canada Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology and Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 P. R. China Research Institute for Sustainable Humanosphere Kyoto University Uji 611-0011 Japan College of Materials Science and Technology Central South University of Forestry and Technology Changsha 410004 P. R. China

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Research on the Characteristics of Wireless Power Transfer in Non-ferromagnetic Metal Pipe

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Journal of Physics: Conference Series 2020年第1期1607卷

作者： Changsheng Li Yong Liu Defu Hu Wei Sun Science and Technology on Electromechanical Dynamic Control Laboratory China Ministerial Key Laboratory of ZNDY Nanjing University of Science and Technology Nanjing 210094 Jiangsu China

With the development of various electronics, the way of transmitting energy by wire has brought increasingly negative effects on the operability and convenience of products. As wireless power transfer (WPT) technology requires no transmission lines, it has received increasingly wide attention. Most of the previous research on the technology of magnetic resonant coupling WPT mainly focused on the transmission of energy in the air. This paper establishes the wireless power transfer system model under non-ferromagnetic metallic environment and studies the effect of non-ferromagnetic metallic environment on coil self-inductance L, mutual inductance M and coil resistance R of WPT system. On this basis, the study on the relationship between coil diameter and mutual inductance is carried out for aluminium pipe, and the relationship between coil diameter and diameter of metal pipe at the maximum mutual inductance is fitted. Besides, experimental verification is conducted for the change of mutual inductance between the coils of WPT system in the aluminium pipe, presenting that the actual measurement results of mutual inductance in the aluminium pipe are consistent with the theory.

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Research on the Characteristics of Wireless Power Transfer in Ferromagnetic Metal Pipe

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Journal of Physics: Conference Series 2020年第2期1601卷

作者： Changsheng Li Wei Sun Defu Hu Yong Liu Science and Technology on Electromechanical Dynamic Control Laboratory China Ministerial Key Laboratory of ZNDY Nanjing University of Science and Technology Nanjing 210094 Jiangsu China

With the development of society, radio energy transmission technology has been paid more and more attention. However, in the actual application environment, the surrounding metal environment has a significant impact on the radio energy transmission performance. Based on the technology of MRR radio energy transmission, this paper establishes a two coil radio energy transmission model, and analyzes the influence of metal environment on the coil self inductance L, mutual inductance m and coil resistance R of the radio energy transmission system by finite element simulation. On this basis, aiming at the ferromagnetic metal environment, the steel pipe is selected as the research object to study the relationship between coil diameter and mutual inductance in the metal pipe, and the relationship between coil diameter and metal pipe diameter when the maximum mutual inductance is obtained through fitting analysis. At the same time, through the experiment, the mutual inductance between the coils of the wireless energy system in the steel tube is verified, and the experimental results are very consistent with the theory.

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Microfluidic inertial switch with delay response characteristics

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Journal of Physics: Conference Series 2020年第10期1507卷

作者： Weirong Nie Guowei Liu Runduo Zhang School of Mechanical Engineering Nanjing University of Science and Technology Nanjing China Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China

This paper proposes an innovation microfluidic inertial switch structure with precise time delay response characteristic, which can be used in the fuze safety and arming system. The switch works on the principle of fluidic inertial force and capillary valve, which makes it sensitive to the unidirection acceleration load and has the ability to recognize the acceleration amplitude. The microfluidic inertial switch has a structure of a J-shaped reservoir, capillary valves, a serpentine delay microchannel and a U-shaped latching microchannel. The acceleration threshold is analyzed theoretically considering the surface tension coefficient of the gas-liquid interface. The delay response time of the switch is studied by finite element simulation based on the Gambit 2.4 and Fluent 6.3 software. The prototype is fabricated by wet etching technology and magnetron sputtering metal technology. Many tests have been done to verify the functions of the switch. The experimental results are matched well to the results of calculation and simulation. When the capillary valve throat widths are 80μm, 120μm, 160μm, the thresholds of the switch are 75.1g, 46.6g, 36.5g. When the switch is loaded with a 75g acceleration load, the delay response is 146.7ms. Finite element simulation and experimental results show that the switch can effectively identify the acceleration threshold, and can achieve a precise delay response under a certain load.

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Structural Optimization Design of H-type Piezoelectric Actuator Based on APDL

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Journal of Physics: Conference Series 2020年第1期1637卷

作者： Suyuan Rui Xinjie Wang School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an 710065 China

Aiming at the problem of low efficiency in optimizing the H-type piezoelectric actuator with the 'trial method', this article uses a program written in the APDL (ANSYS Parametric Design Language) to optimize the structure of the piezoelectric actuator. First, a parametric finite element model is established based on the initial data values of the mover structure. Modal analysis and sensitivity analysis are performed to determine the design variables. Then, the objective function is determined based on the frequency consistency of the two-phase working modes. Finally, based on the optimization tool proposed in this paper, the structure of the H-type piezoelectric actuator is optimized. The optimization results show that the optimization program based on APDL can achieve the optimal design requirements of the H-type piezoelectric actuator and shorten the time required for structural optimization design.

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State estimation for a class of linear systems with quadratic output

arXiv

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arXiv 2020年

作者： Theodosis, Dionysios Berkane, Soulaimane Dimarogonas, Dimos V. Dynamic Systems and Simulation Laboratory School of Production Engineering and Management Technical University of Crete Greece Département d’informatique et d’ingénierie Université du Québec en Outaouis GatineauQC Canada Division of Decision and Control Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Sweden

This paper deals with the problem of state estimation for a class of linear time-invariant systems with quadratic output measurements. An immersion-type approach is presented that transforms the system into a state-affine system by adding a finite number of states to the original system. Under suitable persistence of excitation conditions on the input and its higher derivatives, global state estimation is exhibited by means of a Kalman-type observer. A numerical example is provided to illustrate the applicability of the proposed observer design for the problem of position and velocity estimation for a vehicle navigating in the n−dimensional Euclidean space using a single position range measurement. Copyright © 2020, The Authors. All rights reserved.

关键词： State estimation

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The design of a feedback law to control the fuze in high spin stability projectiles: An internal-model based approach

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Revista de la Facultad de Ingenieria 2017年第1期32卷 386-394页

作者： Luo, Xiaolin Li, Dongguang Science and Technology on Electormechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China Mechanic and Electronic Engineering North University of China Taiyuan030051 China

To despin the fuze of a spinning flying vehicle is difficult in a few seconds, an internal-model based approach is to solution the problem of speed tracking control and load torque disturbance rejection. We first formulate the problem into a global robust output regulation problem of a special class of multivariable systems. Then we further convert the output regulation problem into a global stabilization problem of an augmented system composed of the original plant and an internal model. Finally, through the simulation analysis, this technique, in conjunction with a particular nonlinear internal model, leadsto an effective solution to the problem.

关键词： Feedback

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Research on the Cushioning Effect of Protective Materials under High Impact

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Journal of Physics: Conference Series 2020年第1期1635卷

作者： Runfeng Chen Li Sui Qiang Liu Qiangqiang Qiu Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing China Northwest Industries Group Co. Ltd. Xi'an China

Aiming at the protection of the internal components of the projectile during penetration, the cushion performance of common protective materials such as polyurethane, felt, polytetrafluoroethylene (PTFE), and copper were tested. The test results show that the copper and felt have a certain cushioning effect, which can reduce the acceleration amplitude of 23,000 g by 18% and extend the pulse width of acceleration overload. The cushioning effect of PTFE material is not obvious, but it can play a role in mechanical filtering, making the acceleration curve smoother. Polyurethane material will increase the acceleration amplitude of the buffered part, it is not suitable as a buffer material.

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Analysis for Cooperative Combat System of Manned-unmanned Aerial Vehicles and Combat Simulation

Analysis for Cooperative Combat System of Manned-unmanned Ae...

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2017 IEEE International Conference on Unmanned Systems (ICUS)

作者： Jieru Fan Dongguang Li Rupeng Li Tianyuan Yang Qixian Wang Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology

ISBN: (纸本)9781538631089;9781538631072

Manned-unmanned aerial vehicle cooperative combat has became a focus in the research of combat operation *** maximizes the UAVs' autonomous combat capability and the manned aircraft's command and control capability so that it improves the comprehensive operational *** present,the research on manned-unmanned aerial vehicles cooperative combat is still in exploration *** concept of cooperative combat is incomplete,and further simulation experiments need to be *** this paper,the basic concept of cooperative combat of manned-unmanned aerial vehicle is described,system composition and structure are analyzed,and collaborative combat process is given.A new generalized Lanchester combat model with battlefield sensing coefficient and command & control capacity is *** simulation results show that improving the cooperative combat capability,such as overall sensing capability and command &control capability is beneficial for a combat with relatively smaller *** combat model has theoretical reference value to research information war.

关键词： UAV Combined formation Cooperative engagement Generalized Lanchester combat model Battlefield sensing coefficient

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Roll Estimation for Smart Munitions Using a 3D Magnetometer Only

Roll Estimation for Smart Munitions Using a 3D Magnetometer ...

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2017 IEEE International Conference on Unmanned Systems (ICUS)

作者： Qixian Wang Dongguang Li Rupeng Li Jieru Fan Tianyuan Yang Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology

ISBN: (纸本)9781538631089;9781538631072

Accurate roll angle and roll angular rate are important to improve the target detection accuracy for the smart *** of the limited space in the fuze,only a three-axis magnetometer is used to estimate the roll attitude on the whole *** two methods of roll estimation are proposed and *** is an iterative method based on the attitude transformation matrix,in which the pitch angle and yaw angle at the previous moment are utilized to estimate the roll angle at the moment and then the three angles are kept being *** the other is an extended Kalman filter(EKF) *** state space model is derived by the dynamic characteristic of the smart munitions,and the measurement model is derived by the relationship between geomagnetic field and the output of a three-axis *** simulation results show that the EKF method is able to accurately estimate the roll attitude and is more practical than the iterative method.

关键词： Roll estimation Magnetometer Iterative method EKF Smart Munition

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