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2021-10-04
LAPIQUE, Maxime, GAVAGSAZ-GHOACHANI, Roghayeh, MARTIN, Jean-Philippe, PIERFEDERICI, Serge, ZAIM, Sami.  2020.  Flatness-based control of a 3-phases PWM rectifier with LCL-filter amp; disturbance observer. IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society. :4685–4690.
In more electrical aircraft, the embedded electrical network is handling more and more vital functions, being more and more strained as well. Attenuation of switching harmonics is a key step in the network reliability, thus filtering elements play a central role. To keep the weight of the embedded network reasonable, weakly damped high-order filters shall be preferred. Flatness-based control (FBC) can offer both high bandwidth regulation and large signal stability proof. This make FBC a good candidate to handle the inherent oscillating behavior of aforementioned filters. However, this control strategy can be tricky to implement, especially with high order systems. Moreover, FBC is more sensor demanding than classic PI-based control. This paper address these two drawbacks. First, a novel trajectory planning for high order systems is proposed. This method does not require multiple derivations. Then the input sensors are removed thanks to a parameters estimator. Feasibility and performances are verified with experimental results. Performances comparison with cascaded-loop topologies are given in final section to prove the relevance of the proposed control strategy.
Pilehvar, Mohsen S., Mirafzal, Behrooz.  2020.  Energy-Storage Fed Smart Inverters for Mitigation of Voltage Fluctuations in Islanded Microgrids. 2020 IEEE Electric Power and Energy Conference (EPEC). :1–6.
The continuous integration of intermittent low-carbon energy resources makes islanded microgrids vulnerable to voltage fluctuations. Besides, different dynamic response of synchronous-based and inverter-based distributed generation (DG) units can result in an instantaneous power imbalance between supply and demand during transients. As a result, the ac-bus voltage of microgrid starts oscillating which might have severe consequences such as blackouts. This paper modifies the conventional control scheme of battery energy storage systems (BESSs) to participate in improving the dynamic behavior of islanded microgrids by mitigating the voltage fluctuations. A piecewise linear-elliptic (PLE) droop is proposed and employed in BESS to achieve an enhanced voltage profile by injecting/absorbing reactive power during transients. In this way, the conventional inverter implemented in BESS turns into a smart inverter to cope with fast transients. Using the proposed approach in this paper, any linear droop curve with a specified coefficient can be replaced by a PLE droop curve. Compared with linear droop, an enhanced dynamic response is achieved by utilizing the proposed PLE droop. Case study results are presented using PSCAD/EMTDC to demonstrate the superiority of the proposed approach in improving the dynamic behavior of islanded microgrids.
Jha, Prabhat Kumar, Prajapat, Ganesh P., Bansal, S. K., Solanki, Urmila.  2020.  Mode Identification and Small Signal Stability Analysis of Variable Speed Wind Power Systems. 2020 International Conference on Power Electronics IoT Applications in Renewable Energy and its Control (PARC). :286–291.
The high penetration of wind power generation into the grid evokes all the concerns for the deep understanding of its behavior and impact on the existing power system. This paper investigates the optimal operation of the Doubly Fed Induction Generator (DFIG) for the maximum power point tracking in deep with modal analysis. The grid connected DFIG system has been examined in two cases viz. open-loop case and closed-loop case where closed-loop case consists the system with the Flux Magnitude Angle Control (FMAC) and Direct Torque Control (DTC) approach. Various modes of the oscillation and their damping factor has been found in both the cases for the examination of the internal behavior of the system. Further, the effectiveness of the all the employed controls along with MPPT when the system is subjected to a stepped wind speed disturbance and voltage-dip have been confirmed. It was found from the simulation and the modal analysis that the frequency of the various oscillating modes is lesser while the damping is improved in the case of DTC control.
Wu, Bi-Yi, Sheng, Xin-Qing.  2020.  On the efficient evaluation of Sommerfeld integrals over an impedance plane: exact and asymptotic expressions. 2020 IEEE International Conference on Computational Electromagnetics (ICCEM). :9–10.
In this work, the efficient evaluation of Sommerfeld integrals (SIs) above an impedance plane is addressed. Started from Weyl's expression of SIs, using the coordinate transformation and steepest descent path approach, an exact single image representation to SIs is derived. This single image representation image eliminates oscillating and slow-decay integrand in traditional SIs, and efficient to calculate. Moreover, the far-field asymptotic behavior of SIs in this case is considered and is represented by the Fresnel-integral related function. A high-order approximation based on series expansion of Fresnel integral is provided for fast evaluation. Finally, the validity of the proposed expressions is verified by numerical examples.
Pilehvar, Mohsen S., Mirafzal, Behrooz.  2020.  PV-Fed Smart Inverters for Mitigation of Voltage and Frequency Fluctuations in Islanded Microgrids. 2020 International Conference on Smart Grids and Energy Systems (SGES). :807–812.
The vulnerability of islanded microgrids to voltage and frequency variations is due to the presence of low-inertia distributed generation (DG) units. Besides, the considerable difference between the inertia of synchronous-based and inverter-based DGs results in a power mismatch between generation and consumption during abnormal conditions. As a result, both voltage and frequency of microgrid ac-bus start oscillating which might lead to blackouts. This paper deploys the traditional controller of photovoltaic (PV) units to improve the dynamics of islanded microgrids by reducing the voltage and frequency deviations. To this end, an adaptive piecewise droop (APD) curve is presented and implemented in PV units to attain a faster balance between supply and demand during transients, leading to an enhanced frequency response. Besides, the reactive-power control loop is equipped with a droop characteristic which enables the PV units to inject/absorb reactive power during transients and participate in voltage-profile enhancement of the system. Case study results are presented using PSCAD/EMTDC to confirm the validity of proposed method in improving the dynamic behavior of islanded microgrids.
Shardyko, Igor, Samorodova, Maria, Titov, Victor.  2020.  Development of Control System for a SEA-Joint Based on Active Damping Injection. 2020 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM). :1–6.
This paper is devoted to the choice and justification of a joint-level controller for a joint with intrinsic elasticity. Such joints show a number of advantages in terms of shock robustness, interaction safety, energy efficiency and so on. On the other hand, the addition of elastic element, i.e. a torsion spring, leads to oscillating behaviour. Thus, more elaborate controller structure is required. Active damping injection approach is chosen in this article to improve the joint performance and achieve smooth motion. A method to select controller gains is suggested as well which allows step-wise customization, by which either the settling time can be minimized or the motion can be made fully smooth. Finally, the controller performance is verified in simulation.
Wang, Qianqian, Wang, Ben, Yu, Jiangfan, Schweizer, Kathrin, Nelson, Bradley J., Zhang, Li.  2020.  Reconfigurable Magnetic Microswarm for Thrombolysis under Ultrasound Imaging. 2020 IEEE International Conference on Robotics and Automation (ICRA). :10285–10291.
We propose thrombolysis using a magnetic nanoparticle microswarm with tissue plasminogen activator (tPA) under ultrasound imaging. The microswarm is generated in blood using an oscillating magnetic field and can be navigated with locomotion along both the long and short axis. By modulating the input field, the aspect ratio of the microswarm can be reversibly tuned, showing the ability to adapt to different confined environments. Simulation results indicate that both in-plane and out-of-plane fluid convection are induced around the microswarm, which can be further enhanced by tuning the aspect ratio of the microswarm. Under ultrasound imaging, the microswarm is navigated in a microchannel towards a blood clot and deformed to obtain optimal lysis. Experimental results show that the lysis rate reaches -0.1725 ± 0.0612 mm3/min in the 37°C blood environment under the influence of the microswarm-induced fluid convection and tPA. The lysis rate is enhanced 2.5-fold compared to that without the microswarm (-0.0681 ± 0.0263 mm3/min). Our method provides a new strategy to increase the efficiency of thrombolysis by applying microswarm-induced fluid convection, indicating that swarming micro/nanorobots have the potential to act as effective tools towards targeted therapy.
Ponomarenko, Vladimir, Navrotskaya, Elena, Prokhorov, Mikhail, Lapsheva, Elena, Ishbulatov, Yuri.  2020.  Communication System Based on Chaotic Time-Delayed Feedback Generator. 2020 4th Scientific School on Dynamics of Complex Networks and their Application in Intellectual Robotics (DCNAIR). :192–194.
We study communication systems based on chaotic time-delayed feedback generator. The aim of the study is a comparative assessment of the noise immunity for the four different communication systems at the same levels of the external noise. It is shown that the principle of correlation receiver, which is used in classical communication systems, can be also used in the case where chaotic signals generated by self-oscillating systems with complex behavior are used as reference signals. Systems based on the correlation receiver principles have very high immunity to the external noise.
Madi, Nadim K. M., Madi, Mohammed.  2020.  Analysis of Downlink Scheduling to Bridge between Delay and Throughput in LTE Networks. 2020 7th International Conference on Electrical and Electronics Engineering (ICEEE). :243–247.
The steady growing trend of user demand in using various 4G mobile broadband applications obligates telecom operators to thoroughly plan a precise Quality of Service (QoS) contract with its subscribers. This directly reveals a challenge in figuring out a sophisticated behavior of radio resources (RBs) at the base station to effectively handle the oscillated loads to fulfill their QoS profiles. This paper elaborates on the above issue by analyzing the behavior of the downlink packet scheduling scheme and proposes a solution to bridge between the two major QoS indicators for Real-Time (RT) services, that are, throughput and delay. The proposed scheduling scheme emphasizes that a prior RBs planning indeed has an immense impact on the behavior of the deployed scheduling rule, particularly, when heterogeneous flows share the channel capacity. System-level simulations are performed to evaluate the proposed scheduling scheme in a comparative manner. The numerical results of throughput and delay assured that diverse QoS profiles can be satisfied in case of considering RBs planning.
AIT ALI, Mohamed Elamine, AGOUZOUL, Mohamed, AANNAQUE, Abdeslam.  2020.  Analytical and numerical study of an oscillating liquid inside a U-tube used as wave energy converter. 2020 5th International Conference on Renewable Energies for Developing Countries (REDEC). :1–5.
The objective of this work is to study, using an analytical approach and a numerical simulation, the dynamic behavior of an oscillating liquid inside a fixed U-tube with open ends used as wave energy converter. By establishing a detailed liquid's motion equation and developing a numerical simulation, based on volume of fluid formulation, we quantified the available power that could be extracted for our configuration. A parametrical study using the analytical model showed the effect of each significant parameter on first peak power and subsequent dampening of this peak power, which constitutes a tool for choosing optimal designs. The numerical simulation gave a more realistic model, the obtained results are in good agreements with those of the analytical approach that underestimates the dampening of oscillations. We focused after on influence of the numerical model formulation, mesh type and mesh size on simulation results: no noticeable effect was observed.
Vincelj, Leo, Hrabar, Silvio.  2020.  Dynamical Behavior of Non-Foster Self-oscillating Antenna. 2020 International Symposium ELMAR. :17–20.
An interesting idea of integrated non-Foster self-oscillating radiating system has been introduced recently. The device consists of two identical antennas, a negative impedance converter (NIC) and a tuning circuit. Admittance of one of the antennas is negatively converted via NIC, and cancelled by the positive admittance of the second identical antenna. With the change of frequency, admittances of both antennas change in the exactly same manner. It makes a self-oscillating and perfectly matched pair of antennas, regardless of the operating frequency. The adjustment of the frequency of a self-oscillating signal is achieved by the additional tunable resonant circuit. This paper analyses dynamics of oscillations of such self-oscillating radiating system and compares it with a classical negative resistance oscillator. Moreover, a simple numerical tool for prediction of the frequency and amplitude of oscillations is proposed.
2020-04-24
Schulz, Lukas, Schulz, Dirk.  2018.  Numerical Analysis of the Transient Behavior of the Non-Equilibrium Quantum Liouville Equation. IEEE Transactions on Nanotechnology. 17:1197—1205.

The numerical analysis of transient quantum effects in heterostructure devices with conventional numerical methods tends to pose problems. To overcome these limitations, a novel numerical scheme for the transient non-equilibrium solution of the quantum Liouville equation utilizing a finite volume discretization technique is proposed. Additionally, the solution with regard to the stationary regime, which can serve as a reference solution, is inherently included within the discretization scheme for the transient regime. Resulting in a highly oscillating interference pattern of the statistical density matrix as well in the stationary as in the transient regime, the reflecting nature of the conventional boundary conditions can be an additional source of error. Avoiding these non-physical reflections, the concept of a complex absorbing potential used for the Schrödinger equation is utilized to redefine the drift operator in order to render open boundary conditions for quantum transport equations. Furthermore, the method allows the application of the commonly used concept of inflow boundary conditions.

Kim, Chang-Woo, Jang, Gang-Heyon, Shin, Kyung-Hun, Jeong, Sang-Sub, You, Dae-Joon, Choi, Jang-Young.  2020.  Electromagnetic Design and Dynamic Characteristics of Permanent Magnet Linear Oscillating Machines Considering Instantaneous Inductance According to Mover Position. IEEE Transactions on Applied Superconductivity. 30:1—5.

Interior permanent magnet (IPM)-type linear oscillating actuators (LOAs) have a higher output power density than typical LOAs. Their mover consists of a permanent magnet (PM) and an iron core, however, this configuration generates significant side forces. The device can malfunction due to eccentricity in the electromagnetic behavior. Thus, here an electromagnetic design was developed to minimize this side force. In addition, dynamic analysis was performed considering the mechanical systems of LOAs. To perform a more accurate analysis, instantaneous inductance was considered according to the mover's position.

Bahman Soltani, Hooman, Abiri, Habibollah.  2018.  Criteria for Determining Maximum Theoretical Oscillating Frequency of Extended Interaction Oscillators for Terahertz Applications. IEEE Transactions on Electron Devices. 65:1564—1571.

Extended interaction oscillators (EIOs) are high-frequency vacuum-electronic sources, capable to generate millimeter-wave to terahertz (THz) radiations. They are considered to be potential sources of high-power submillimeter wavelengths. Different slow-wave structures and beam geometries are used for EIOs. This paper presents a quantitative figure of merit, the critical unloaded oscillating frequency (fcr) for any specific geometry of EIO. This figure is calculated and tested for 2π standing-wave modes (a common mode for EIOs) of two different slowwave structures (SWSs), one double-ridge SWS driven by a sheet electron beam and one ring-loaded waveguide driven by a cylindrical beam. The calculated fcrs are compared with particle-in-cell (PIC) results, showing an acceptable agreement. The derived fcr is calculated three to four orders of magnitude faster than the PIC solver. Generality of the method, its clear physical interpretation and computational rapidity, makes it a convenient approach to evaluate the high-frequency behavior of any specified EIO geometry. This allows to investigate the changes in geometry to attain higher frequencies at THz spectrum.

Rahman, Lamiya, Adan, Jannatul, Nahid-AI-Masood, Deeba, Shohana Rahman.  2018.  Performance Analysis of Floating Buoy Point Absorber and Oscillating Surge Wave Energy Converters in Onshore and Offshore Locations. 2018 10th International Conference on Electrical and Computer Engineering (ICECE). :233—236.

The aim of this paper is to explore the performance of two well-known wave energy converters (WECs) namely Floating Buoy Point Absorber (FBPA) and Oscillating Surge (OS) in onshore and offshore locations. To achieve clean energy targets by reducing greenhouse gas emissions, integration of renewable energy resources is continuously increasing all around the world. In addition to widespread renewable energy source such as wind and solar photovoltaic (PV), wave energy extracted from ocean is becoming more tangible day by day. In the literature, a number of WEC devices are reported. However, further investigations are still needed to better understand the behaviors of FBPA WEC and OS WEC under irregular wave conditions in onshore and offshore locations. Note that being surrounded by Bay of Bengal, Bangladesh has huge scope of utilizing wave power. To this end, FBPA WEC and OS WEC are simulated using the typical onshore and offshore wave height and wave period of the coastal area of Bangladesh. Afterwards, performances of the aforementioned two WECs are compared by analyzing their power output.

Luo, Xuesong, Wang, Shaoping.  2018.  Multi-work Condition Modeling and Performance Analysis of Linear Oscillating Actuators. 2018 IEEE International Conference on Prognostics and Health Management (ICPHM). :1—7.

Linear oscillating actuators are emerging electrical motors applied to direct-drive electromechanical systems. They merit high efficiency and quick dynamical property due to the unique structure of spring oscillator. Resonant principle is the base of their high performance, which however, is easily influenced by various load, complex environment and mechanical failure. This paper studies the modeling of linear oscillating actuators in multi-work condition. Three kinds of load are considered in performance evaluation model. Simulations are conducted at different frequencies to obtain the actuator behavior, especially at non-resonance frequencies. A method of constant impedance angle is proposed to search the best working points in sorts of conditions. Eventually, analytical results reflect that the resonant parameter would drift with load, while linear oscillating actuators exhibits robustness in efficiency performance. Several evaluating parameters are concluded to assess the actuator health status.

M'zoughi, Fares, Garrido, Aitor J., Garrido, Izaskun, Bouallègue, Soufiene, Ayadi, Mounir.  2018.  Sliding Mode Rotational Speed Control of an Oscillating Water Column-based Wave Generation Power Plants. 2018 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM). :1263—1270.

This paper deals with the modeling and control of the NEREIDA wave generation power plant installed in Mutriku, Spain. This kind of Oscillating Water Column (OWC) plants usually employ a Wells turbine coupled to a Doubly Fed Induction Generator (DFIG). The stalling behavior of the Wells turbine limits the generated power. In this context, a sliding mode rotational speed control is proposed to help avoiding this phenomenon. This will regulate the speed by means of the Rotor Side Converter (RSC) of the Back-to-Back converter governing the generator. The results of the comparative study show that the proposed control provides a higher generated power compared to the uncontrolled case.

Overgaard, Jacob E. F., Hertel, Jens Christian, Pejtersen, Jens, Knott, Arnold.  2018.  Application Specific Integrated Gate-Drive Circuit for Driving Self-Oscillating Gallium Nitride Logic-Level Power Transistors. 2018 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC). :1—6.
Wide bandgap power semiconductors are key enablers for increasing the power density of switch-mode power supplies. However, they require new gate drive technologies. This paper examines and characterizes a fabricated gate-driver in a class-E resonant inverter. The gate-driver's total area of 1.2mm2 includes two high-voltage transistors for gate-driving, integrated complementary metal-oxide-semiconductor (CMOS) gate-drivers, high-speed floating level-shifter and reset circuitry. A prototype printed circuit board (PCB) was designed to assess the implications of an electrostatic discharge (ESD) diode, its parasitic capacitance and package bondwire connections. The parasitic capacitance was estimated using its discharge time from an initial voltage and the capacitance is 56.7 pF. Both bondwires and the diode's parasitic capacitance is neglegible. The gate-driver's functional behaviour is validated using a parallel LC resonant tank resembling a self-oscillating gate-drive. Measurements and simulations show the ESD diode clamps the output voltage to a minimum of -2V.
M'zoughi, Fares, Bouallègue, Soufiene, Ayadi, Mounir, Garrido, Aitor J., Garrido, Izaskun.  2018.  Harmony search algorithm-based airflow control of an oscillating water column-based wave generation power plants. 2018 International Conference on Advanced Systems and Electric Technologies (IC\_ASET). :249—254.

The NEREIDA wave generation power plant installed in Mutriku, Spain is a multiple Oscillating Water Column (OWC) plant. The power takeoff consists of a Wells turbine coupled to a Doubly Fed Induction Generator (DFIG). The stalling behavior present in the Wells turbine limits the generated power. This paper presents the modeling and a Harmony Search Algorithm-based airflow control of the OWC. The Harmony Search Algorithm (HSA) is proposed to help overcome the limitations of a traditionally tuned PID. An investigation between HSA-tuned controller and the traditionally tuned controller has been performed. Results of the controlled and uncontrolled plant prove the effectiveness of the airflow control and the superiority of the HSA-tuned controller.

Makhoul, Rawad, Maynard, Xavier, Perichon, Pierre, Frey, David, Jeannin, Pierre-Olivier, Lembeye, Yves.  2018.  A Novel Self Oscillating Class Phi2 Inverter Topology. 2018 2nd European Conference on Electrical Engineering and Computer Science (EECS). :7—10.

The class φ2 is a single transistor, fast transient inverter topology often associated with power conversion at very high frequency (VHF: 30MHz-300MHz). At VHF, gate drivers available on the market fail to provide the adequate transistor switching signal. Hence, there is a need for new power topologies that do no make use of gate drivers but are still suitable for power conversion at VHF. In This paper, we introduce a new class φ;2 topology that incorporates an oscillator, which takes the drain signal through a feedback circuit in order to force the transistor switching. A design methodology is provided and a 1MHz 20V input prototype is built in order to validate the topology behaviour.

Serras, Paula, Ibarra-Berastegi, Gabriel, Saénz, Jon, Ulazia, Alain, Esnaola, Ganix.  2019.  Analysis of Wells-type turbines’ operational parameters during winter of 2014 at Mutriku wave farm. OCEANS 2019 – Marseille. :1—5.

Mutriku wave farm is the first commercial plant all around the world. Since July 2011 it has been continuously selling electricity to the grid. It operates with the OWC technology and has 14 operating Wells-type turbines. In the plant there is a SCADA data recording system that collects the most important parameters of the turbines; among them, the pressure in the inlet chamber, the position of the security valve (from fully open to fully closed) and the generated power in the last 5 minutes. There is also an electricity meter which provides information about the amount of electric energy sold to the grid. The 2014 winter (January, February and March), and especially the first fortnight of February, was a stormy winter with rough sea state conditions. This was reflected both in the performance of the turbines (high pressure values, up to 9234.2 Pa; low opening degrees of the security valve, down to 49.4°; and high power generation of about 7681.6 W, all these data being average values) and in the calculated capacity factor (CF = 0.265 in winter and CF = 0.294 in February 2014). This capacity factor is a good tool for the comparison of different WEC technologies or different locations and shows an important seasonal behavior.

Noeren, Jannis, Parspour, Nejila.  2019.  A Dynamic Model for Contactless Energy Transfer Systems. 2019 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW). :297—301.

Inductive contactless energy transfer (CET) systems show a certain oscillating transient behavior of inrush currents on both system sides. This causes current overshoots in the electrical components and has to be considered for the system dimensioning. This paper presents a simple and yet very accurate model, which describes the dynamic behavior of series-series compensated inductive CET systems. This model precisely qualifies the systems current courses for both sides in time domain. Additionally, an analysis in frequency domain allows further knowledge for parameter estimation. Since this model is applicable for purely resistive loads and constant voltage loads with bridge rectifiers, it is very practicable and can be useful for control techniques and narameter estimation.

Rodriguez, Manuel, Fathy, Hosam.  2019.  Self-Synchronization of Connected Vehicles in Traffic Networks: What Happens When We Think of Vehicles as Waves? 2019 American Control Conference (ACC). :2651—2657.

In this paper we consider connected and autonomous vehicles (CAV) in a traffic network as moving waves defined by their frequency and phase. This outlook allows us to develop a multi-layer decentralized control strategy that achieves the following desirable behaviors: (1) safe spacing between vehicles traveling down the same road, (2) coordinated safe crossing at intersections of conflicting flows, (3) smooth velocity profiles when traversing adjacent intersections. The approach consist of using the Kuramoto equation to synchronize the phase and frequency of agents in the network. The output of this layer serves as the reference trajectory for a back-stepping controller that interfaces the first-order dynamics of the phase-domain layer and the second order dynamics of the vehicle. We show the performance of the strategy for a single intersection and a small urban grid network. The literature has focused on solving the intersection coordination problem in both a centralized and decentralized manner. Some authors have even used the Kuramoto equation to achieve synchronization of traffic lights. Our proposed strategy falls in the rubric of a decentralized approach, but unlike previous work, it defines the vehicles as the oscillating agents, and leverages their inter-connectivity to achieve network-wide synchronization. In this way, it combines the benefits of coordinating the crossing of vehicles at individual intersections and synchronizing flow from adjacent junctions.

Balijabudda, Venkata Sreekanth, Thapar, Dhruv, Santikellur, Pranesh, Chakraborty, Rajat Subhra, Chakrabarti, Indrajit.  2019.  Design of a Chaotic Oscillator based Model Building Attack Resistant Arbiter PUF. 2019 Asian Hardware Oriented Security and Trust Symposium (AsianHOST). :1—6.

Physical Unclonable Functions (PUFs) are vulnerable to various modelling attacks. The chaotic behaviour of oscillating systems can be leveraged to improve their security against these attacks. We have integrated an Arbiter PUF implemented on a FPGA with Chua's oscillator circuit to obtain robust final responses. These responses are tested against conventional Machine Learning and Deep Learning attacks for verifying security of the design. It has been found that such a design is robust with prediction accuracy of nearly 50%. Moreover, the quality of the PUF architecture is evaluated for uniformity and uniqueness metrics and Monte Carlo analysis at varying temperatures is performed for determining reliability.

Bertram, Jon, Tanwear, Asfand, Rodriguez, Aurelio, Paterson, Gary, McVitie, Stephen, Heidari, Hadi.  2019.  Spin-Hall Nano-Oscillator Simulations. 2019 IEEE SENSORS. :1—4.

A spin-Hall nano-oscillator (SHNO) is a type of spintronic oscillator that shows promising performance as a nanoscale microwave source and for neuromorphic computing applications. Within such nanodevices, a non-ferromagnetic layer in the presence of an external magnetic field and a DC bias current generates an oscillating microwave voltage. For developing optimal nano-oscillators, accurate simulations of the device's complex behaviour are required before fabrication. This work simulates the key behaviour of a nanoconstriction SHNO as the applied DC bias current is varied. The current density and Oersted field of the device have been presented, the magnetisation oscillations have been clearly visualised in three dimensions and the spatial distribution of the active mode determined. These simulations allow designers a greater understanding and characterisation of the device's behaviour while also providing a means of comparison when experimental resultsO are generated.