Torque Ripple Minimization Control of SRM Based on Novel Motor Model Considering Mutual Coupling Effect

2018 ◽  
Author(s):  
Sungyong Shin ◽  
Naruse Hikaru ◽  
Takashi Kosaka ◽  
Nobuyuki Matsui
Keyword(s):  
Mutual Coupling ◽  
Coupling Effect ◽  
Torque Ripple ◽  
Motor Model

scholarly journals Compressed Sensing-Based DOA Estimation with Unknown Mutual Coupling Effect

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 424 ◽  
Author(s):  
Peng Chen ◽  
Zhenxin Cao ◽  
Zhimin Chen ◽  
Linxi Liu ◽  
Man Feng
Keyword(s):  
Compressed Sensing ◽  
Mutual Coupling ◽  
Linear Array ◽  
State Of The Art ◽  
Coupling Effect ◽  
Estimation Method ◽  
Doa Estimation ◽  
System Model ◽  
Reconstruction Problem ◽  
Uniform Linear Array

The performance of a direction-finding system is significantly degraded by the imperfection of an array. In this paper, the direction-of-arrival (DOA) estimation problem is investigated in the uniform linear array (ULA) system with the unknown mutual coupling (MC) effect. The system model with MC effect is formulated. Then, by exploiting the signal sparsity in the spatial domain, a compressed-sensing (CS)-based system model is proposed with the MC coefficients, and the problem of DOA estimation is converted into that of a sparse reconstruction. To solve the reconstruction problem efficiently, a novel DOA estimation method, named sparse-based DOA estimation with unknown MC effect (SDMC), is proposed, where both the sparse signal and the MC coefficients are estimated iteratively. Simulation results show that the proposed method can achieve better performance of DOA estimation in the scenario with MC effect than the state-of-the-art methods, and improve the DOA estimation performance about 31.64 % by reducing the MC effect by about 4 dB.

scholarly journals Modified Minkowski Fractal Unit Cell for Reflectarrays with Low Sensitivity to Mutual Coupling Effects

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Sandra Costanzo ◽  
Francesca Venneri ◽  
Giuseppe Di Massa
Keyword(s):  
Mutual Coupling ◽  
Coupling Effect ◽  
Single Layer ◽  
Unit Cell ◽  
Phase Curve ◽  
Lower Sensitivity ◽  
Coupling Effects ◽  
Infinite Array ◽  
Low Sensitivity ◽  
Phase Design

A single-layer miniaturized reflectarray element with low sensitivity to mutual coupling effects of surrounding elements is presented in this paper. The configuration is proposed to preserve the effectiveness of the infinite array approach in those applications requiring reflectarrays with very small interelement spacing. The inherent ability of the proposed geometry to be adopted in highly miniaturized cells is demonstrated through an extensive analysis of mutual coupling effects on reflectarray phase design curves. In order to prove the independence of the proposed cell to mutual coupling effect, the phase curve variations due to the presence of different surrounding elements with respect to the case of identical cells are evaluated using the well-known extended local periodicity method. Small and negligible mutual coupling errors are retrieved for the proposed miniaturized unit cell, thus demonstrating lower sensitivity to mutual coupling adverse effects.

Optimal Antenna Matching and Mutual Coupling Effect of Antenna Array in MIMO Receiver

2007 ◽  
Vol E90-B (4) ◽  
pp. 960-967 ◽  
Author(s):  
H. IURA ◽  
H. YAMADA ◽  
Y. OGAWA ◽  
Y. YAMAGUCHI
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Coupling Effect
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