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Based on three-dimensional (3D) Fourier heat flow equation and numerical simulation, we investigated thermal crosstalk of resistive switching memory in 3D crossbar structure for the first time. Our results show that the transient thermal effect will dominate reset process. With the decrease of RS device size, the thermal crosstalk would remarkably deteriorate the retention of RS memory device and...
In this paper, we propose a new integral equation method based on the formulations for vector potential A and scalar potential Φ. The new formulation, which is immune from low-frequency breakdown problem, is proposed for both electromagnetic scattering and circuit problems. Since both vector and scalar potentials are important for capturing the low-frequency physics, the contribution from scalar potential...
This paper reviews our recently developed fast and efficient algorithms for multiscale structure modeling. Low-frequency electromagnetic analysis becomes indispensable for multi-scale structures because of the involved minute length-scale compared to wavelength and mid length-scale on the order of wavelength or larger, where wave physics meets circuit physics. We are currently investigating stable...
In this paper, a simplified form of electric field integral equation with Calderón multiplicative preconditioner (CMP-EFIE) is presented for solving capacitive problems in the low-frequency regime. The decomposed three-term CMP-EFIE, though very stable, cannot capture the current accurately for a capacitor at low frequencies. By omitting the part of the hypersingular preconditioned term, the electric...
This paper proposes a fault-tolerant control strategy for a nonlinear electro-hydraulic system. The fault-tolerant control scheme consists a fault diagnosis system and a reconfigurable controller. The fault diagnosis system is designed based on differential-geometric approach and is robust to system disturbance. Adaptive backstepping method is utilized for realizing the reconfigurable controller....
This research designs and fabricates a voice coil motor with shorted turn for positioning control experiment and uses laser displacement sensor to measure the displacement. Sliding-mode-based fuzzy control is developed to carry out positioning control of a moving component in the voice coil motor. According to experimental results, the motor with shorted turn in positioning requires less voltage input...
This paper presents an approach to realize an equivalent hardware representation of PM synchronous machines through a physics-based machine model for hardware-in-the-loop simulation of PWM drives. The equivalent hardware representation of the machine is achieved using a controllable load. The load current is controlled to be the same as the currents obtained over the physics-based model of the machine...
In this paper, a high frequency physical phase variable model of electric machines is presented. The proposed model is composed of a low frequency phase variable model and a high frequency winding branch connected in parallel. The high frequency winding branch is used to include the distributed effects appearing at high frequency operation while the low frequency phase variable model captures the...
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