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design of LQR control law for hybrid electric propulsion system based on engine IOL 8

Design of LQR control law for hybrid electric propulsion sys...

引用

8th International conference on Traffic engineering and Transportation System, ICTETS 2024

作者： Zhu, Yingtao Zhu, Bingjie Yang, Xixiang Hou, Zhongxi College of Aerospace Sciences and Engineering National University of Defense Technology 109 Deya road Changsha410073 China

ISBN: (数字)9781510686298

ISBN: (纸本)9781510686281

With the rapid development of the aviation industry, the demand for air traffic has been growing steadily, and the trend of electric power for aircraft has also taken shape. Due to the relatively low energy density of current batteries, hybrid electric propulsion represents a more feasible option under the present technological conditions. this paper conducts research on fixed-wing vertical take-off and landing (VTOL) air-craft, adopts a series hybrid electric propulsion system(HEPS), finds the efficient working point of the engine based on the universal characteristic curve of the engine, and thus establishes the ideal operating line (IOL) of the internal combustion engine. A state-space model of the hybrid electric propulsion system has been established, and a control law based on Linear Quadratic Regulator (LQR) has been designed. Simulation results indicate that the proposed LQR control law enables the engine to operate along the ideal working line, thereby enhancing the fuel economy of the hybrid electric propulsion system. © 2024 SPIE.

关键词： VTOL/STOL aircraft

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design of a real-time pyrosequencer by bioluminometric assay coupled with photodiode array

Design of a real-time pyrosequencer by bioluminometric assay...

引用

8th International conference on Photonics and Imaging in Biology and Medicine, PIBM 2009

作者： Chen, Haifeng Liang, Chao Li, Chuanjun Li, Cheng Ge, Jianhui Zhang, Yuming Zhou, Guohua Huadong Research Institute for Medicine and Biotechnics Nanjing 210002 China State Key Laboratory of Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Science Beijing 100083 China

ISBN: (纸本)9780819479082

Objective: A system for real-time pyrosequencing by biolumino-metric assay coupled with a photodiode array is presented. the approach is based on the detection of DNA polymerase activity by an enzymatic luminometric inorganic pyrophosphate (PPi) detection assay. It is designed to offer a convenient pyrosequencing-based platform for DNA sequencing with low cost and simple structure. Method: Together with the automated dNTPs micro-dispensers, a photoelectric conversion circuit with high sensitive photodiode S1133-01 and ultra-low bias current monolithic operational amplifier OPA129 is chosen to detect the luminometric, monitoring the ATP production continuously. the signal to noise ratio is improved efficiently by routing PCB and shielding carefully. Results: A C14 standard light source is selected to compare the sensitivity of the system to the photomultiplier tubes (PMT). the results show that the magnification of the circuits is ten times higher than the PMT, which is sufficient for detecting the DNAs as small as 10 fmol. Four different type of dNTPs are injected into the reaction cell in turn and the peak of luminescence illuminates the result, which is coinciding with the commercial system. Conclusion: the system is small, simple and inexpensive, which is enough for real-time pyrosequencing. But there are many works to do to construct the fast and high-flux DNA sequencing system. © 2009 Copyright SPIE - the International Society for optical engineering.

关键词： Photomultipliers

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design of the Electric Machine Emulator System with Interface Parameters Based on Multi-disciplinary Cooperative Optimization 8

Design of the Electric Machine Emulator System with Interfac...

引用

8th International conference on Electromechanical Control Technology and Transportation, ICECTT 2023

作者： Wang, Zhifu Tian, Hao Sun, Qingle National Engineering Research Center of Electric Vehicles Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9781510668331

To solve the problems of the new energy vehicles' electric drive system test work, in contrast with traditional test sands based on real motors, a new electric machine emulator system is established. To improve the performance, the LCL-type topology is chosen for the interface, a key component of the system. With the problems of multiple parameters and strong coupling, the design of the LCL-type interface parameter is transformed into a multi-objective, multi-disciplinary optimization problem, and a multi-disciplinary collaborative optimization architecture is established with an improved particle swarm optimization algorithm based on dual time scales to obtain the optimal parameters that consider simulation accuracy and system stability, total volume and cost. the simulation and physical platform test results show that the new electric machine emulator system can achieve accurate simulation of real motors, which can complete the test of the electric drive system for vehicles. When the optimization parameters obtained by this paper method are used, the phase current error is significantly reduced while the total inductor is also reduced, resulting in a significant increase in the simulation accuracy and a reduction in the volume and cost. this verifies the superiority of the multi-disciplinary collaborative optimization architecture and improved optimization algorithm for interface parameter design. © 2023 SPIE.

关键词： Parameter estimation

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Topology information based spare capacity provisioning in WDM networks

引用

8th International conference on Grid and Pervasive Computing, GPC 2013

作者： Hwang, Hoyoung Kim, Seung-Cheon Dept. of Multimedia Engineering Hansung University Korea Republic of Dept. of Information Communication Engineeging Hansung University Korea Republic of

ISBN: (纸本)9783642380266

For networksurvivability, recovery methods from link or node failures should be provided and spare capacity to perform recovery should be prepared on the network links. the efficiency of spare capacity provisioning is a key issue in survivable network design. In this paper, we studied topology information based capacity provisioning methods for WDM optical networks which are widly used as a backbone architecture of current *** the methods, the spare wavelengths are reserved to perform optical link protection using only topology information of a network without need to calculate the amount of on-going traffic of the network, thus provide simple and efficient spapre capacity planning. the basic idea of the topology information based methods is embedding virtual cycles to perform recovery on the network topology *** suggest a multiple ring-cover based spare capacity provisioning scheme and compare it with two other topology information based schemes called cyclic-double-cover and p-cycle. We provide performance analysis of the topology information based schemes by the numerical calculation using cut-sets of the topology graphs, and compare it with computer simulation results. © 2013 Springer-Verlag.

关键词： Recovery

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Loss Calculation and Fluid-thermal Field Coupled Analysis of Bridge Arm Reactor 8

Loss Calculation and Fluid-Thermal Field Coupled Analysis of...

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8th International conference on Energy System, Electricity, and Power, ESEP 2023

作者： Wang, Liuyang Yang, Fan Tang, Pengfei Zhao, Qi Wang, Pengbo Li, Xinheng State Key Laboratory of Power Transmission Equipment Technology School of Electrical Engineering Chongqing University 400044 China China Electric Power Research Institute Beijing100192 China Tianjin Key Laboratory of Internet of Things in Electricity State Grid Tianjin Electric Power Research Institute Tianjin300384 China

ISBN: (数字)9781510679801

ISBN: (纸本)9781510679795

Bridge arm reactors are subjected to composite current of AC and DC in operation, having both AC current distribution characteristics based on inductance distribution and DC current distribution characteristics based on resistance distribution. Aiming to study the differences in temperature rise, current and loss calculations are performed according to electromagnetism and heat transfer theories. the static temperature distribution law of the reactor and its influencing factors are analyzed. the results show that the loss of metal accessories accounts for 1.02% and the collector ring is prone to local overheating. the maximum temperature rise of the encapsulation shows a nonlinear decrease with the increase of the flow rate and the decrease of the ambient temperature. the winding hottest spot temperature in AC condition is higher than that in DC condition. the temperature distribution is more uniform in DC condition. the research results can provide reference for the design of temperature rise of reactors under AC-DC compound high current in actual engineering. © 2024 SPIE.

关键词： Temperature distribution

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design and prototyping of new CERN collimators in the framework of the LHC injector upgrade (LIU) project and the high-luminosity LHC (HL-LHC) project 8

Design and prototyping of new CERN collimators in the framew...

引用

8th International Particle Accelerator conference, IPAC 2017

作者： Nuiry, F.-X. Aberle, O. Bergeret, M. Bertarelli, A. Biancacci, N. Bruce, R. Calviani, M. Carra, F. Dallocchio, A. Gentini, L. Gilardoni, S. Illan, R. Garcia, I. Lamas Masi, A. Perillo-Marcone, A. Pianese, S. Redaelli, S. Rigutto, E. Salvant, B. CERN Geneva Switzerland

ISBN: (纸本)9783954501823

In the framework of the Large Hadron Collider (LHC) Injectors Upgrade (LIU) and the High-Luminosity LHC (HL-LHC) Projects at CERN (European Organization for Nuclear Research, in Geneva, Switzerland), collimators in the Super Proton Synchrotron (SPS) to LHC transfer lines as well as ring collimators in the LHC will undergo important upgrades in the forthcoming years, mainly focused during the Long Shutdown 2 foreseen during 2019-2020. this contribution will detail the current design of the TCDIL collimators with a particular emphasis on the engineering developments performed on the collimator jaws, aiming at getting a stringent flatness while considering also the integration of thermal shock resistant materials. the prototyping phase done at CERN will be also described. the activities ongoing to prepare the series production for other LHC collimator types (TCPPM, TCSPM, TCTPM, TCLD) will be presented, describing the role that each of these collimators play on the HL-LHC Project. A focus on the series production processes, the manufacturing and assembly technologies involved and the quality and performance assurance tests will be given. © 2017 CC-BY-3.0 and by the respective authors

关键词： Luminance

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VERSATILE MOSAIC CCD CONTROLLER-design 8

VERSATILE MOSAIC CCD CONTROLLER-DESIGN

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8th SPIE conference on Instrumentation in Astronomy

作者： HAN, WY CLAYTON, M WALKER, DD KOREA ASTRON OBSERV TAEJON 305348SOUTH KOREA

ISBN: (纸本)081941493X

current astronomical CCDs (Charge-coupled devices) are limited in size. However, there are increasing demands for larger devices for spectroscopic and direct imaging use. A comparison of the areas of a direct Schmidt-survey plate, and the largest CCD likely to be available in the foreseeable future, serves to illustrate limitations of current electronic technology. Similarly, modern spectrographs can serve either high spectral resolution or multi-object capability, but not both. One could conceive of an updated analogue of a classical coude spectrograph, which would provide both simultaneously, were the enormous detector areas required available. It is with these two long-term applications in view that we consider the prospects for large-scale CCD mosaics. Spectroscopy in particular would benefit from mixed devices in the same mosaic e.g. blue and red- optimised, IR devices etc. We address how optimally to provide the drive waveforms with (1) minimum interconnections and complexity, (2) the ability to mix CCDs, (3) the ability to tune the individual CCD waveforms for optimum low-light level performance, and (4) to conceive an architecture which is indefinitely expansible. Our solution is to multiplex the drive waveforms to the CCDs as well as the signals from them. Minimum chip-count in the sequencing electronics is ensured by using high-density PLD technology (Programmable Logic Device), which enables a module of sixteen or more CCDs to be sequenced from one PLD plus memory. We describe a laboratory prototype, and describe how this could be developed into a system with all the drive electronics for large numbers of CCDs immediately behind the focal plane array. We also summarize our software system for efficiently generating and editing the bitmaps which define the CCD waveforms.

关键词： Charge-coupled devices Computer aided design Control systems Sensors Raster graphics Multiplexing Imaging systems Clocks Prototyping Logic

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design improvement of a buffered SOA-based ultrafast all-optical half adder with PolSK modulated signals

Design improvement of a buffered SOA-based ultrafast all-opt...

引用

International Symposium on High Capacity optical Networks and Enabling Technologies, HONET

作者： Hamed Ahmadi Hassan Kaatuzian Photonics Research Laboratory Electrical Engineering Department Amirkabir University of Technology Tehran Iran

In this paper, we analyze and improve a modern structure optical design for an ultrafast all-optical half adder. this design is based on four wave mixing (FWM) in a semiconductor optical amplifier (SOA), with polarization-shift-keying (PolSK) modulation input signals. For analyzing the amplifier we use a finite-difference method based on solution of the traveling wave equations. In this study, we have shown that the output signal power of the device increases with the length of the SOA section and current injection.

关键词： optical amplifiers Stimulated emission optical fiber networks ISO standards optical polarization

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On the characterization of materials and masonry walls of historical buildings: Use of optical system to obtain displacement maps in double-flat jack tests 8th

On the characterization of materials and masonry walls of hi...

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8th International conference on Structural engineering, Mechanics and Computation (SEMC)

作者： Acito, M. Magrinelli, E. Tiraboschi, C. Cucchi, M. Politecn Milan Dept Architecture Built Environm & Construct Engn Milan Italy Politecn Milan Mat Testing Lab Milan Italy

ISBN: (纸本)9781003348450;9781032391144

Among the testing techniques aiming at the mechanical characterization of masonry, the double flat-jack testing method is widely adopted to identify the local value of significant parameters needed to perform structural analyses, such as elastic modulus, Poisson's ratio and compressive strength. the experience gained from many applications has allowed not only to collect experimental data concerning different types of masonry, but also to highlight the difficulty in the interpretation of the results and the limitations of both single and double flat-jack tests. Although the accuracy of the flat-jack technique in detecting strength and deformability behavior of masonry is still debated in the technical literature and practical activities, changes in the testing procedure aiming at ascertaining the validity of the test results have not been formally defined yet. After a brief description of the standard test procedure and its uncertainties, the present paper proposes an upgrade of the test procedure for improving the level of reliability of the test results. In particular, an experimental case study related to a historical brick masonry building located in Italy is presented to point out the additional information necessary to validate the results of the testing process.

关键词： Compressive strength

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the dynamic performance of the spindle in ultra-precision machine tools under different drive systems 8

The dynamic performance of the spindle in ultra-precision ma...

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8th Asia Pacific conference on Optics Manufacture, APCOM 2023 and 3rd International Forum of Young Scientists on Advanced optical Manufacturing, YSAOM 2023

作者： Wu, Hailiang Yang, Hui Lu, Chaowei Zhang, Yang Aviation Key Laboratory of Science and Technology on Precision Manufacturing Technology Beijing Precision Engineering Institute for Aircraft Industry Beijing100076 China

ISBN: (纸本)9781510672673

In order to analyze the influence of servo drives on the dynamic performance of multi-Axis coordinated ultra-precision machine tools, this study employs Simulink modeling and simulation of the control system for a domestic ultra-precision machine tool with gas-static spindle, followed by conducting position control experiments. the dynamic response of the spindle under different drives in ultra-precision machine tools is modeled based on the dynamic characteristic equation of the spindle motor. Waveforms of current, torque, and speed response of the spindle motor under different drives are simulated and analyzed. Control laws between the controlled object and the drive system are derived from the analysis of simulation data. Based on this, a dynamic performance testing platform for the spindle in ultra-precision machine tools is established, with the repeatability of positioning accuracy as the dynamic performance parameter. the linear correlation analysis between the experimental data of repeatability of positioning accuracy and the simulation results is conducted to quantitatively evaluate their correlation. Finally, it is determined that the gas-static spindle under the control of a linear amplifier exhibits the best dynamic performance. Moreover, as the PWM frequency increases under the control of PWM-Type drives at 100 kHz, 50 kHz, and 16 kHz, the dynamic performance of the spindle also improves. this study provides reference for the selection of drives in the design and selection stage of control systems for ultra-precision machine tools. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Machine tools

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