Miao Li

Liaoning University

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Qiangming Zhou

State Grid Hebei Electric Power Company

Bin Lü

Australian National University

Yaoling Tian

China Academy of Engineering Physics

Wei Hu

Tsinghua University

Shoujun Wang

Nankai University

Xiaoping Li

Qufu Normal University

Tad Kwasniewski

Carleton University

Jing Wang

Union Hospital

Wei Gao

Sun Yat-sen University

Changxing Lin

China Academy of Engineering Physics

Cooperative Institutions

Chinese Academy of Sciences

State Grid Corporation of China (China)

Tsinghua University

China Academy of Engineering Physics

Huazhong University of Science and Technology

University of Electronic Science and Technology of China

University of Chinese Academy of Sciences

Chongqing University

Southeast University

Peking University

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An integrated adaptive controller based on characteristic model for motion control system

AIP conference proceedings (2018)

Rui Yin Zhiqiang Wang Gang Wang Dachuan Liu Xiaowei Lv

The transmission mechanisms with finite stiffness and unmeasured disturbance are two main factors that affect the performance of motion control system. Therefore, in order to improve the tracking and stabilization performance of motion control system, an integrated adaptive controller based on characteristic model is developed, which is composed of golden-section adaptive control, disturbance observer, phase compensation and position integral controller. Experimental results with different frequencies of desired sinusoidal trajectory show the effectiveness of the proposed control approach compared with the conventional control.

Position (finance)

Observer (physics)

Motion system

10.1063/1.5039047

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Citations (1)

Study on acoustic radiation response characteristics of sound barriers

Open Physics (2021)

Jiyong Jin Congyun Zhu Rui Wu Yanming Liu Miao Li

Abstract The influence of acoustic radiation is considered in the prediction of noise attenuation effect of sound barrier, which provides a theoretical reference for further improving the insertion loss of sound barrier. Based on the theory of thin plate vibration, the vibration mode and natural frequencies of sound barrier under arbitrary boundary conditions are established by using two-dimensional beam function method, and the forced vibration response of the sound barrier is calculated based on the modal superposition method. MATLAB software (MathWorks Company, Natick, Massachusetts, USA) is used to calculate the natural frequencies and the radiated sound power level of the sound barrier, which indicated that the sound radiation caused by external excitation would significantly increase the sound pressure level at the received point, which should be considered as one of the influencing factors in the prediction of noise attenuation effect. The influence of diverse structural parameters on the radiated acoustic power is compared, providing an excellent reference for the design of sound barrier with low noise.

Acoustic attenuation

Acoustic radiation

Sound speed gradient

Sound exposure

10.1515/phys-2021-0068

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Online Evaluation of Primary Frequency Regulation Based on WAMS

Miao Li Jianbo Sun Xiaoping Li Weiling Zhang Qiuyu Lu

Primary frequency regulation plays a significant role in power system frequency control. As a result of the separation of plant and grid, it becomes necessary for the grid to monitor the primary frequency performance of generators. This paper designs an online evaluation system of primary frequency regulation based on WAMS. Firstly, the evaluation indices system is proposed, which assesses the primary frequency performance of units from perspectives of static performance, dynamic performance and the regulating process. And the responding algorithms are designed for each index. In this part, a method of Variance Comparison, which helps to find the frequency changing point accurately, is presented to solve the key problem in calculation process. Besides, the impact of electromechanical transient process is taken into account when calculating the contribution electric quantity index and a practical modified method is presented. Computer simulations based on the large frequency disturbance in Hubei Grid are conducted, and the results illustrate the feasibility and efficiency of the proposed algorithms.

Frequency grid

Transient (computer programming)

10.1109/appeec.2012.6307644

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Citations (2)

An optimal charging strategy for electrical vehicles based on the electricity price with temporal and spatial characteristics

Jiejun Chen Jun Yang Miao Li Qiangming Zhou Biao Jiang

With the popularization of Electric Vehicles (EVs), the out-of-order random charging behavior of large-scale EVs will bring new challenges to the safe and economic dispatch of power system. This paper divides the driving area into four zones according to the functional area of distribution network, and a regional time-of-use (RTOU) electricity price model is proposed considering its spatial and temporal characteristics. The optimization scheduling model of EVs including regional layer and node layer is proposed in this paper. To minimize the charging cost of users and peak-valley difference in the distribution network, the regional layer model is established to optimize the time and region of EVs charging. To minimize the network loss, the node layer model is built to optimize the position of EVs charging. Simulations based on an IEEE 33-bus distribution network have verified the effectiveness of the proposed optimal charging strategy for EVs. Also, the distribution grid could obtain better economic benefits when the charging stations are installed in the slack bus.

Position (finance)

10.1109/pesgm.2016.7741413

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Citations (7)

Design and optimization of multi-tap DFE for high-speed backplane data communications

Miao Li Shoujun Wang Jing Chen T. Kwaśniewski

Multi-tap decision-feedback-equalization (DFE) is proposed to counteract inter-symbol interference (ISI) in high-speed backplane data communications. A MATLAB program has been developed to optimize the DFE tap coefficients for a given backplane channel. A multi-tap DFE receiver with an optional analog pre-equalizer implemented in 0.18 /spl mu/m CMOS technology demonstrates 8 Gb/s operation with PRBS15 data over a 34" FR4 backplane.

Backplane

10.1109/pacrim.2005.1517361

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Citations (3)

All Printed Large Area E-field Antenna Utilizing Printed Organic Rectifying Diodes for RF Energy Harvesting

Miao Li George Daniel Bruce E. Kahn Liam O'Hara B. D. F. Casse

Fully printed radio frequency (RF) harvesters that operate at HF RFID and ISM frequency of 13.56 MHz are normally comprised of a small printed loop antenna. They work at short ranges using inductive coupling. In this paper, we present a novel screen printed large area E-field antenna incorporated with a printed organic diode rectifier that can provide close to 1 V dc voltage with 1 W input at a distance of a few meters. The unique high bulk capacitance of the printed organic diodes enables effective imaginary impedance matching to the antenna without an additional matching component. The results demonstrate the possibility of fully printed RF energy harvesters for long range operation at HF frequencies.

Rectenna

Rectifier (neural networks)

Antenna tuner

Loop antenna

10.1109/nano.2018.8626318

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Citations (2)

Research on the Framework of NAND FLASH Based Object-Based-Storage-Device

Qiyou Xie Miao Li Husheng Liu Qiang Liu Hongshan Nie

Object Based Storage Device (OSD) takes object as the purpose of storage and management, OSD can be regarded as the convergence of two technologies: files and blocks. The most distinct difference between OSD and traditional storage device is the storage interface, and different storage mediums also affect the performance notability. NAND flash based solid state storage has become the mainstream of next generation data storage, because it's outstanding performance. A NAND flash based OSD framework is discussed and the approaches of data rewriting and address mapping are given in this paper.

Object storage

Flash Memory

10.1109/isdea.2012.754

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Citations (1)

Design and Control of Ultrasound Image-guided Prostatic Brachytherapy Robot

Recent Patents on Mechanical Engineering (2023)

Yue Sun Xuesong Dai Qihao Yin Linfeng Ju Xiaolan Tang

Background:: With the continuous development of medical robots, they have become a powerful tool for surgery and treatment. A prostate brachytherapy robot is a kind of robot widely used in prostate cancer treatment; its main function is to accurately implant radioactive seeds into prostate tissue to kill cancer cells. Using prostate brachytherapy robots for surgery can reduce damage to surrounding tissue during surgery, thereby reducing the risk of external electrolysis and metastasis of tumor cells. Objective:: This study aimed to design a prostate brachytherapy robot that is more in line with practical usage needs, based on the method of manually performing prostate brachytherapy surgery in clinical practice. Finally, its feasibility has been demonstrated through brachytherapy experiments. Methods:: Firstly, the actual requirements for prostate particle implantation surgery have been analyzed, which has been followed by reviewing previous literature and patents to determine the design scheme of the robot. Finally, SOLIDWORKS software has been used for mechanical design of the robot, and the control system of the robot has been designed based on Arduino. Results:: A robotic arm type prostate particle implantation robot has been successfully designed. We have installed a visual module on the prostate particle implantation robot, which has enabled the robot system to have image transmission monitoring function to assist in the calibration of the puncture position before surgery. Finally, we have employed other sensors to complete the particle implantation experiment, and successfully confirmed its superiority through comparing errors. Conclusion:: This work has analyzed and studied the clinical process of prostate particle implantation surgery, and designed a prostate particle implantation robot, including the mechanical design and control system design of the robot. We have also simulated the scene of prostate particle implantation surgery in the human body through particle implantation experiments, and successfully and accurately implanted radioactive particles to the target. The experimental results have proven the feasibility of the robot. We have made improvements in execution efficiency by using a parallelogram-based robotic arm as the representation of the prostate particle implantation robot and equipped it with a visual module. The visual module collects a video stream of the puncture needle's perspective and provides feedback to the control end to assist in the calibration of the puncture position before surgery, greatly reducing the probability of secondary injury to patients.

Prostate brachytherapy

10.2174/0122127976272524231116192345

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Citations (1)

Discussion of Safety Protection Design for Power Secondary Automation System

Miao Li

The rapid development of computer and Internet technology has put forward higher requirements for the safety protection design of secondary system.Hence,the State Electricity Supervisory Commission developed and promulgated the power secondary system overall security program for the protection of the safe and stable operation of functional systems.Combined with the current technique,a number of factors of how to strengthen the security of the secondary system strategy were proposed.

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Smart Grid Supports the Future Sustainable Development

Advanced materials research (2015)

Miao Li Wei Gao Ri Sheng Jiao

With the developing of technology, such as application of new energy, new material, large scale energy storage technology, ultra-long distance large scale transmission technology, intelligent control, estimation, message communication, internet, we establish a new industrial era. Well, sustainable development became an important issue. We need to supply much more cleanable and efficiency energy to meet the environment protecting and unstopping load of power gird increasing. So, smart grid came to our sight.In this paper, first we discuss that electricity is the foundation of modern industry. Second, we put forward the new problems that modern industry brings about, and discuss the necessity of developing smart grid. And then we particularly discuss the rewards that developing intelligent grid, such as solving the energy crisis, changing the running mode of grid, advancing the intelligent life, promoting the electricity client involved in the power market adjusting process and so on, as well as provided the relevant examples. All of these do well to future sustainable development. At last, we sum up the whole paper.

Power grid

10.4028/www.scientific.net/amr.1092-1093.352

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