Gotowe bibliografie tematyczne / Hybrid electromechanical devices

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Gotowa bibliografia na temat „Hybrid electromechanical devices”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Hybrid electromechanical devices"

Xu, Lin, Yong-Hong Tang, Wei Pu i Yang Han. "Hybrid electromechanical-electromagnetic simulation to SVC controller based on ADPSS platform". Journal of Energy in Southern Africa 25, nr 4 (19.12.2014): 112–22. http://dx.doi.org/10.17159/2413-3051/2014/v25i4a2244.

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To test the dynamic performance and damping features of a static var compensator (SVC) controller accurately in large-scale interconnected AC/DC hybrid power systems, it is of vital significance to build the detailed electromagnetic transient model. However, it is unrealistic and time-consuming to build the detailed models of all the devices in the actual large-scale power grid. Utilizing the hybrid simulation function in the advanced digital power system simulator (ADPSS) and by dividing the large-scale power grid into the electromagnetic transient sub-grids and electromechanical sub-grids, the computation speed of real-time simulation is remarkably enhanced by the parallel computational capabilities of digital simulator. The SVC controller and the nearby substation are modelled in the electromagnetic transient sub-grid, and the residue sub-networks are modelled in the electromechanical sub-grid. This paper focuses on the mechanism of the hybrid electromechanical and electromagnetic simulation, the detailed modelling and the ADPSS-based digital closed-loop test methodologies of the SVC controller. Eventually, the validity and effectiveness of the modelling and control methods are confirmed by the experimental results.

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Gurevich, Vladimir. "Hybrid reed: Solid-state devices are a new generation of protective relays". Serbian Journal of Electrical Engineering 4, nr 1 (2007): 85–94. http://dx.doi.org/10.2298/sjee0701085g.

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Research and development in the field of electromechanical protective relays has not been conducted for tens of years. Author?s approach allows viewing the problem of re-equipment of relay protection in a new way. In the author?s opinion combination of reed switches with magnetic circuits and semiconductor elements opens new avenues in development of the promising protective relays featuring reliability, simplicity and low cost. Examples of protective relays made with these elements are given below.

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Fan, Zhihua, Qinling Deng, Xiaoyu Ma i Shaolin Zhou. "Phase Change Metasurfaces by Continuous or Quasi-Continuous Atoms for Active Optoelectronic Integration". Materials 14, nr 5 (7.03.2021): 1272. http://dx.doi.org/10.3390/ma14051272.

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In recent decades, metasurfaces have emerged as an exotic and appealing group of nanophotonic devices for versatile wave regulation with deep subwavelength thickness facilitating compact integration. However, the ability to dynamically control the wave–matter interaction with external stimulus is highly desirable especially in such scenarios as integrated photonics and optoelectronics, since their performance in amplitude and phase control settle down once manufactured. Currently, available routes to construct active photonic devices include micro-electromechanical system (MEMS), semiconductors, liquid crystal, and phase change materials (PCMs)-integrated hybrid devices, etc. For the sake of compact integration and good compatibility with the mainstream complementary metal oxide semiconductor (CMOS) process for nanofabrication and device integration, the PCMs-based scheme stands out as a viable and promising candidate. Therefore, this review focuses on recent progresses on phase change metasurfaces with dynamic wave control (amplitude and phase or wavefront), and especially outlines those with continuous or quasi-continuous atoms in favor of optoelectronic integration.

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Shingare, Kishor Balasaheb, i Susmita Naskar. "Analytical Solution for Static and Dynamic Analysis of Graphene-Based Hybrid Flexoelectric Nanostructures". Journal of Composites Science 5, nr 3 (6.03.2021): 74. http://dx.doi.org/10.3390/jcs5030074.

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Owing to their applications in devices such as in electromechanical sensors, actuators and nanogenerators, the consideration of size-dependent properties in the electromechanical response of composites is of great importance. In this study, a closed-form solution based on the linear piezoelectricity, Kirchhoff’s plate theory and Navier’s solution was developed, to envisage the electromechanical behaviors of hybrid graphene-reinforced piezoelectric composite (GRPC) plates, considering the flexoelectric effect. The governing equations and respective boundary conditions were obtained, using Hamilton’s variational principle for achieving static deflection and resonant frequency. Moreover, the different parameters considering aspect ratio, thickness of plate, different loadings (inline, point, uniformly distributed load (UDL), uniformly varying load (UVL)), the combination of different volume fraction of graphene and piezoelectric lead zirconate titanate are considered to attain the desired bending deflection and frequency response of GRPC. Different mode shapes and flexoelectric coefficients are also considered and the results reveal that the proper addition of graphene percentage and flexoelectric effect on the static and dynamic responses of GRPC plate is substantial. The obtained results expose that the flexoelectric effect on the piezoelastic response of the bending of nanocomposite plates are worth paying attention to, in order to develop a nanoelectromechanical system (NEMS). Our fundamental study sheds the possibility of evolving lightweight and high-performance NEMS applications over the existing piezoelectric materials.

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Doan, Anh Tung, Takahiro Yokoyama, Thang Duy Dao, Satoshi Ishii, Akihiko Ohi, Toshihide Nabatame, Yoshiki Wada, Shigenao Maruyama i Tadaaki Nagao. "A MEMS-Based Quad-Wavelength Hybrid Plasmonic–Pyroelectric Infrared Detector". Micromachines 10, nr 6 (21.06.2019): 413. http://dx.doi.org/10.3390/mi10060413.

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Spectrally selective detection is of crucial importance for diverse modern spectroscopic applications such as multi-wavelength pyrometry, non-dispersive infrared gas sensing, biomedical analysis, flame detection, and thermal imaging. This paper reports a quad-wavelength hybrid plasmonic–pyroelectric detector that exhibited spectrally selective infrared detection at four wavelengths—3.3, 3.7, 4.1, and 4.5 μm. The narrowband detection was achieved by coupling the incident infrared light to the resonant modes of the four different plasmonic perfect absorbers based on Al-disk-array placed on a Al2O3–Al bilayer. These absorbers were directly integrated on top of a zinc oxide thin film functioning as a pyroelectric transducer. The device was fabricated using micro-electromechanical system (MEMS) technology to optimize the spectral responsivity. The proposed detector operated at room temperature and exhibited a responsivity of approximately 100–140 mV/W with a full width at half maximum of about 0.9–1.2 μm. The wavelength tunability, high spectral resolution, compactness and robust MEMS-based platform of the hybrid device demonstrated a great advantage over conventional photodetectors with bandpass filters, and exhibited impressive possibilities for miniature multi-wavelength spectroscopic devices.

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Al-Ajmi, Mohammad Shafi, Faizal Mustapha, Mohd Khairol Anuar b. Mohd Ariffin, Nurul Amziah Md Yunus i Izhal Abdul Halin. "A True Hybrid Solar Wind Turbine Electric Generator System for Smaller Hybrid Renewable Energy Power Plants". MATEC Web of Conferences 215 (2018): 01015. http://dx.doi.org/10.1051/matecconf/201821501015.

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Contemporary Hybrid Solar-Wind farms are implemented using separate solar Photovoltaic (PV) cell arrays and wind turbines, where electricity generated from both devices are combined. However, this solution requires a large amount of space to cater for the PV arrays and wind turbines of the system. This paper proposes a new type of renewable energy electric generator with a small power production footprint (PPF) that allows reduction in land usage. The technology introduced in this True Hybrid Wind-Solar (THWS) generator allows for the solar panels to rotate along with a VAWT wind turbine it is attached to through a specially designed electromechanical coupling mechanism. The working principal behind the connections described in this paper. The design of a hybrid circuit module that serves to combine current generated via the solar cells and wind generator and also automatically disconnects inactive wind or solar generators is also described. This is important in order to eliminate unwanted loads generated from the inactive generators from within the THWS itself.

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Maruccio, Claudio, Giuseppe Quaranta, Pasquale Montegiglio, Francesco Trentadue i Giuseppe Acciani. "A Two-Step Hybrid Approach for Modeling the Nonlinear Dynamic Response of Piezoelectric Energy Harvesters". Shock and Vibration 2018 (2018): 1–21. http://dx.doi.org/10.1155/2018/2054873.

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An effective hybrid computational framework is described here in order to assess the nonlinear dynamic response of piezoelectric energy harvesting devices. The proposed strategy basically consists of two steps. First, fully coupled multiphysics finite element (FE) analyses are performed to evaluate the nonlinear static response of the device. An enhanced reduced-order model is then derived, where the global dynamic response is formulated in the state-space using lumped coefficients enriched with the information derived from the FE simulations. The electromechanical response of piezoelectric beams under forced vibrations is studied by means of the proposed approach, which is also validated by comparing numerical predictions with some experimental results. Such numerical and experimental investigations have been carried out with the main aim of studying the influence of material and geometrical parameters on the global nonlinear response. The advantage of the presented approach is that the overall computational and experimental efforts are significantly reduced while preserving a satisfactory accuracy in the assessment of the global behavior.

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Hu, Tengjiang, Kuang Fang, Zhiming Zhang, Xiaohua Jiang i Yulong Zhao. "The Hybrid Fabrication Process of Metal/Silicon Composite Structure for MEMS S&A Device". Micromachines 10, nr 7 (13.07.2019): 469. http://dx.doi.org/10.3390/mi10070469.

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The micro-electromechanical system (MEMS) safety-and-arming (S&A) device has the features of integration and miniaturization, which is one of the important directions of weapon development. Confined by the fabrication process, the silicon-based devices are too fragile, and the metal-based devices are low precision. In order to solve the contradiction between high precision and high structure strength, a metal/silicon composite structure is proposed in this paper, and a hybrid fabrication process is introduced. This new method mainly consists of metal sputtering, electroplating, and (inductively–coupled-plasma) ICP etching. As the resolution of the thick dry film is limited, the process of a femtosecond laser is applied to refine the structure, and the Ni plate (a block of 1 mm × 3 mm × 0.3 mm with a cavity of ϕ 0.85 mm × 0.3 mm in the center) is fabricated on the silicon-on-insulator (SOI) wafer successfully. After the double sides are etched by ICP, the SOI wafer is immersed in a buffered-oxide-etch (BOE) etchant to remove the buried layer. The cover plate acts as the encapsulation and is bonded with the SOI wafer by the epoxy glue. Then, the temporary support beam of the device is broken by the probe, and the suspended composite structure can be fully released. The hybrid process is the integration of the silicon-based process and the metal-based process, which can combine the advantages of both high precision and a high structure strength. The process proposed here is suitable for the application of weapon miniaturization.

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Ruiz-Díez, Víctor, Jorge Hernando-García i José Luis Sánchez-Rojas. "Linear Motors Based on Piezoelectric MEMS". Proceedings 64, nr 1 (20.11.2020): 9. http://dx.doi.org/10.3390/iecat2020-08483.

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This paper reports the design, fabrication and performance of Micro-electromechanical Systems (MEMS) piezoelectric bidirectional conveyors featuring 3D-printed legs in bridge resonators. The structures consisted of aluminium-nitride (AlN) piezoelectric film on top of millimetre-sized rectangular thin silicon bridges and two electrode patches. The position and size of the patches were analytically optimised for wave generation, while the addition of 3D-printed legs, for a controlled contact, allowed for a further step into the manufacturing of efficient linear motors. Such hybrid devices have recently demonstrated the conveyance of sliders—surpassing several times the motor weight—with speeds of 1.7 mm/s while operated at 6 V and 19.3 kHz. However, by the optimisation of various aspects of the device such as the vibrational modes and excitation signals, speeds above 25 mm/s were demonstrated.

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Nandor, Mark J., Maryellen Heebner, Roger Quinn, Ronald J. Triolo i Nathaniel S. Makowski. "Transmission Comparison for Cooperative Robotic Applications". Actuators 10, nr 9 (25.08.2021): 203. http://dx.doi.org/10.3390/act10090203.

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The development of powered assistive devices that integrate exoskeletal motors and muscle activation for gait restoration benefits from actuators with low backdrive torque. Such an approach enables motors to assist as needed while maximizing the joint torque muscles, contributing to movement, and facilitating ballistic motions instead of overcoming passive dynamics. Two electromechanical actuators were developed to determine the effect of two candidate transmission implementations for an exoskeletal joint. To differentiate the transmission effects, the devices utilized the same motor and similar gearing. One actuator included a commercially available harmonic drive transmission while the other incorporated a custom designed two-stage planetary transmission. Passive resistance and mechanical efficiency were determined based on isometric torque and passive resistance. The planetary-based actuator outperformed the harmonic-based actuator in all tests and would be more suitable for hybrid exoskeletons.

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Rozprawy doktorskie na temat "Hybrid electromechanical devices"

Agber, J. U. "Hybrid stepping motors with multiple-teeth per pole". Thesis, University of Newcastle Upon Tyne, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355834.

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So, Eric Chi Tang. "A study of noise and vibration of 5-phase hybrid stepping motors". Thesis, Heriot-Watt University, 1993. http://hdl.handle.net/10399/711.

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Lee, Po Wa. "Sensorless rotor position detection in the hybrid stepping motor for self commutation". Thesis, University of Warwick, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338717.

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Majumder, Sourav. "Superconducting qubit-based hybrid devices". Thesis, 2022. https://etd.iisc.ac.in/handle/2005/6074.

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Quantum technology has potential applications in many areas of science and engineering. Recently, there has been significant progress in developing hybrid quantum devices using a superconducting qubit platform. The hybrid devices in this category combine the advantage of superconducting qubits with other degrees of freedom. Many experimental realizations of such devices have demonstrated entanglement, state preparation, and readout between multiple modes. I will present a hybrid electromechanical device consisting of a transmon type qubit and a SiN-based mechanical resonator. The device shows a large coupling between electrical and mechanical degrees of freedom compared to the earlier demonstration in traditional optomechanics. The large coupling manifests itself in the form of LZS interference observed in the qubit spectroscopy. In addition, I will present a theoretical model to understand the three-mode hybrid system in the presence of the external drive. In such a tripartite system, we analyze the steady-state occupation of the mechanical mode to show that the sideband cooling of the mechanical mode to its ground state is achievable. The theoretical calculations here predict the experimental parameters for the optimal readout of the mechanical mode, which is also verified experimentally. In the second part of my talk, I will discuss a novel architecture to implement a fast frequency tunable qubit in a three-dimensional waveguide cavity. Control over the qubit frequency can be a valuable resource in the hybrid system consisting of superconducting qubits. We investigate the flux-dependent dynamic range, relaxation from unconfined states, and the bandwidth of the flux-line. We use the fast-flux line to tune the qubit frequency and demonstrate the swap of a single excitation between cavity and qubit mode. The circuit QED setup presented here provides an alternating method to design a modular hybrid system where the components can easily be modified, added, or removed as required for a design.

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Książki na temat "Hybrid electromechanical devices"

Shi, Peng, Ligang Wu i Xiaojie Su. Sliding Mode Control of Uncertain Parameter-Switching Hybrid Systems. Wiley & Sons, Incorporated, John, 2014.

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Sliding Mode Control Of Uncertain Parameterswitching Hybrid Systems. John Wiley & Sons Inc, 2014.

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Shi, Peng, Ligang Wu i Xiaojie Su. Sliding Mode Control of Uncertain Parameter-Switching Hybrid Systems. Wiley & Sons, Incorporated, John, 2014.

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Shi, Peng, Ligang Wu i Xiaojie Su. Sliding Mode Control of Uncertain Parameter-Switching Hybrid Systems. Wiley & Sons, Incorporated, John, 2014.

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Shi, Peng, Ligang Wu i Xiaojie Su. Sliding Mode Control of Uncertain Parameter-Switching Hybrid Systems. Wiley & Sons, Limited, John, 2014.

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Części książek na temat "Hybrid electromechanical devices"

G. Mohammed, Khalid. "Mechanical and Electrical Design Calculations of Hybrid Vehicles". W Applied Electromechanical Devices and Machines for Electric Mobility Solutions. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.91059.

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Ahn, Kyoungho, i Hesham A. Rakha. "A Simple Hybrid Electric Vehicle Fuel Consumption Model for Transportation Applications". W Applied Electromechanical Devices and Machines for Electric Mobility Solutions. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.89055.

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Swade, Doron. "Automatic computation". W The History of Computing: A Very Short Introduction, 43—C3.P72. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/actrade/9780198831754.003.0003.

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Abstract This chapter describes automatic computation in the pre-electronic era, i.e. up to the late 1930s. It traces the main systems devised using mechanical and electromechanical technologies to perform numerical computation. Analogue and digital computers are described. It introduces automatic digital computation through the 19th-century mechanical calculating engines of Charles Babbage. It explores his aspirations for machine computation and his collaboration with Ada Lovelace. It offers correctives to received perceptions. It describes the principles and use of analogue computers for calculation and for solving equations, including Kelvin’s tide predictor, Phillips’ economics computer, and Bush’s electrically driven differential analysers. It traces the revival of automatic digital computation through initiatives in Germany and the US: Zuse’s mechanical and electromechanical machines in Berlin, the machines of Stibitz at Bell Labs using electromechanical relays, and Aiken’s hybrid machine, the Harvard Mark. I. It demonstrates examples of two repeated themes: the challenges of emerging new technologies and the stimulus of war. It discusses the ambitions for the machines and the uses to which they were put. Each is located in the overall developmental arcs of industry, use, and public perception. It recounts the misunderstood origin story of the word ‘bug’.

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Streszczenia konferencji na temat "Hybrid electromechanical devices"

Xu, Tian-Bing, i Ji Su. "Theoretical Modeling for Electroactive Polymer-Ceramic Hybrid Actuation Systems". W ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-62491.

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An electroactive polymer-ceramic hybrid actuation system (HYBAS) was recently developed. The HYBAS demonstrates significantly-enhanced electromechanical performance by utilizing advantages of cooperative contributions of the electromechanical responses of an electrostrictive copolymer and an electroactive single crystal. The hybrid actuation system provides not only a new type of device but also a concept to utilize different electroactive materials in a cooperative and efficient method for optimized electromechanical performance. In order to develop an effective procedure to optimize the performance of a hybrid actuation system (HYBAS), a theoretical model has been developed, based on the elastic and electromechanical properties of the materials utilized in the system and on the configuration of the device. The model also evaluates performance optimization as a function of geometric parameters, including the length of the HYBAS and the thickness ratios of the constituent components. The comparison between the model and the experimental results shows a good agreement and validates the model as an effective method for the further development of high performance actuating devices or systems for various applications.

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Leber, Darrell E., Brian N. Meek, Seth D. Leija, Dale G. Wilson, Richard L. Chaney i Douglas R. Hackler. "Electromechanical Reliability Testing of Flexible Hybrid Electronics Incorporating FleX Silicon-On-Polymer Ics". W 2016 IEEE Workshop on Microelectronics and Electron Devices (WMED). IEEE, 2016. http://dx.doi.org/10.1109/wmed.2016.7458276.

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Yanni Li i D. C. Aliprantis. "Optimal design of electromechanical devices using a hybrid finite element/air-gap element method". W 2013 IEEE Power and Energy Conference at Illinois (PECI 2013). IEEE, 2013. http://dx.doi.org/10.1109/peci.2013.6506043.

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Xu, Z. L., X. B. Shan, R. J. Song i T. Xie. "Electromechanical modeling and experimental verification of nonlinear hybrid vibration energy harvester". W 2014 Joint IEEE International Symposium on the Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices & Workshop on Piezoresponse Force Microscopy (ISAF/IWATMD/PFM). IEEE, 2014. http://dx.doi.org/10.1109/isaf.2014.6923018.

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Jung, Yung J., Laila Jaber-Ansari, Xugang Xiong, Sinan Mu¨ftu¨, Ahmed Busnaina, Swastik Kar, Caterina Soldano i Pulickel M. Ajayan. "Highly Organized Carbon Nanotube-PDMS Hybrid System for Multifunctional Flexible Devices". W ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35442.

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We will present a method to fabricate a new class of hybrid composite structures based on highly organized multiwalled carbon nanotube (MWNT) and singlewalled carbon nanotube (SWNT) network architectures and a polydimethylsiloxane (PDMS) matrix for the prototype high performance flexible systems which could be used for many daily-use applications. To build 1–3 dimensional highly organized network architectures with carbon nanotubes (both MWNT and SWNT) in macro/micro/nanoscale we used various nanotube assembly processes such as selective growth of carbon nanotubes using chemical vapor deposition (CVD) and self-assembly of nanotubes on the patterned trenches through solution evaporation with dip coating. Then these vertically or horizontally aligned and assembled nanotube architectures and networks are transferred in PDMS matrix using casting process thereby creating highly organized carbon nanotube based flexible composite structures. The PDMS matrix undergoes excellent conformal filling within the dense nanotube network, giving rise to extremely flexible conducting structures with unique electromechanical properties. We will demonstrate its robustness under large stress conditions, under which the composite is found to retain its conducting nature. We will also demonstrate that these structures can be directly utilized as flexible field-emission devices. Our devices show some of the best field enhancement factors and turn-on electric fields reported so far.

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Choi, W. Y. "Monolithic 3D (M3D) Complementary Metal-Oxide-Semiconductor (CMOS)-Nano-Electromechanical (NEM) Hybrid Circuits for Low-Power and High-Speed Reconfigurable Logic (RL) Applications". W 2016 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2016. http://dx.doi.org/10.7567/ssdm.2016.a-1-01.

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Yoo, Jin-Hyeong, Jayant Sirohi, Norman M. Wereley i Inderjit Chopra. "Magnetorheological Hydraulic Actuator Driven by a Piezopump". W ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43315.

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Magnetorheological (MR) fluids can be used in a variety of smart semi-active systems. The MR damper shows an especially great potential to mitigate environmentally induced vibration and shocks. Another aspect of MR fluids is the construction of MR valve network in conjunction with a hydraulic pump resulting in a fully active actuator. These devices are simple, have few moving parts and can be easily miniaturized to provide a compact, high energy density pressure source. The present study describes a prototype MR-piezo hybrid actuator that combines the piezopump and MR valve actuator concepts, resulting in a self-contained hydraulic actuation device without active electromechanical valves. Durability and miniaturization of the hybrid device are major advantages due to its low part count and few moving parts. An additional advantage is the ability to use the MR valve network in the actuator to achieve controllable damping. The design, construction and testing of a prototype MR-piezo hybrid actuator is described. The performance and efficiency of the device is derived using ideal, biviscous and Bingham-plastic representations of MR fluid behavior, and is evaluated with experimental measurements. This will provide a design tool to develop an actuator for a specific application.

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Kuch, Benjamin, i M. Amin Karami. "Powering Pacemakers With a Nonlinear Hybrid Rotary-Translational Energy Harvester". W ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35333.

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An application of a nonlinear Hybrid Rotary-Translational (HRT) generator is presented. An HRT generator differs from traditional energy harvesting devices in that it has the ability to harvest multi-axis base excitation. The device consists of a pendulum-like system whose rotations are caused by the base excitations. The swinging pendulum is coupled to a direct current micro generator to generate electricity. The considered application is the energy harvesting from heartbeat induced vibrations. The motivation behind studying the effectiveness of this application comes from battery hindrance. The use of relatively large batteries to power pacemakers presents many medical problems, including increasing the size of the device to accommodate the battery causing surgery complications as well as needing periodic battery replacement. An energy harvesting device can eliminate the need for such a battery, relying instead on the power generated by the beating heart. The nonlinearity of the device allows constant power to be generated across a wider range of frequencies (heartbeats per minute). The contractions of the heart are considered to be the base excitations of the device, causing the pendulum to swing. To validate and then optimize the design of the HRT system, the behavior and the power generation of the system will be studied under different parameters: size of generator, mass and length of pendulum components as well as frequency of heart beats (beats per minute). This presents an interesting design problem whose goal is to find the best HRT parameters that would result in generating the sufficient amounts of power required by pacemakers. A method in approximating the nonlinear dynamics of the electro-mechanical energy harvesting system is also presented. By studying the analytical solutions to the nonlinear electromechanical system under a sine wave excitation, we can gain insight into the problem. The extent of this paper will only cover the analytical solution to the vertically excited pendulum. Perturbation methods, specifically the multiple scales method will be employed to study the effects of forcing amplitude and frequency on the system behavior and the energy harvesting system.

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A. Rendón, Manuel, Carlos D. Sanchez R., Josselyn Gallo M., José F. Garcia S., Ning Xiong, Patricia Habib Hallak, Nícolas Lima Oliveira, Yipsy Roque Benito i Janderson Mazzine Afonso. "Using Dfferential Evolution Techniques for Management of a Hybrid-Electric Propulsion System". W Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1727.

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The air transportation industry contributes with 2% of the total greenhouse gas emissions, and there is a demand from global aviation regulators for reducing this percentage. Hybrid-electric propulsion systems (HEPS) for aircraft is an area of increasing interest for achieving these goals. It is a multidisciplinary research that involves internal combustion engines (ICE), electric motors (EM), power electronic converters, energy storage devices, propeller design, monitoring and control systems, management, etc. The Electromechanical Energy Conversion Group (GCEME) in Brazil developed a complete HEPS test bench and Laboratory. The facility will be able to test three different topologies: Series, full-electric and turbo-electric. The present work employs a detailed model for the test bench, and given a mission prole and the energy consumption as optimization function, it applies Dierential Evolution (DE) techniques in the energy management code. The results highlight the nonlinear nature of the HEPS model, and the worth of this methodology in looking for an optimal solution to reduce the computing processing time.

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Larichev, A. V., I. P. Nikolaev i P. Violino. "High Resolution Adaptive System with a Phase Knife in the Optical Feedback Loop". W Adaptive Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/adop.1996.athc.20.

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Conventional adaptive systems, whose key elements are wavefront sensor and electromechanical wavefront corrector, face considerable difficulties, when high-order aberrations’ correction is required [1]. The increase of number of adaptive mirror’s control elements (up to several hundreds, recently [2]) inevitably leads to the sophistication of the sensor for measuring the wavefront “fine structure” and to intensive computations at the stage of wavefront reconstruction. Therefore, new techniques controlling light with light, which do not violate the distributed nature of light wave, attract attention of researchers [3, 4, 5]. There are a number of optically controllable hybrid devices (microchannel modulator [3], liquid crystal light valve (LCLV) [4], and membrane mirror [5]) that may be used for distributed wave front correction. However, the adequate control methods for such correctors should be developed.

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