Uplink Null-Space Expansion for Multiuser Massive MIMO in Time-Varying Channels Under Unknown Interference

Arai, Kabuto; Maruta, Kazuki; Ahn, Chang-Jun

doi:10.1109/access.2020.3044053

Cited by 5 publications

(1 citation statement)

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“…where x 2 refers to the device state vector attitude angular rate; x 1 is the device state vector attitude; y is the device output vector; d refers to unknown external interference; h(t) refers to the saturation function of the input value of the device [12], as shown in equation ( 9); and g 1 , g 2 , f 1 (t), and f 2 (t) refer to the functions that the device is fully in a smooth state. Constant value of switchgear function vector of _ x 1 and _ x 2 devices [13].…”

Section: Device Modelingmentioning

confidence: 99%

Nonlinear Control Method of Superconducting Energy Storage considering Voltage Imbalance in Distribution Network

Xin

2022

Security and Communication Networks

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A new nonlinear control approach of superconducting energy storage is devised under the condition of addressing the voltage imbalance of the distribution network in order to obtain more precise control of superconducting energy storage devices (SMEs). The model of the superconducting energy storage device is built on the basis of determining the voltage imbalance signal of the distribution network. Aiming at the situation that the voltage of the device will change at the same time when the structure of the device changes, a nonlinear controller is designed to estimate the discontinuous interference state of the nonlinear controller device and combined with the nonlinear control algorithm to realize the nonlinear control of superconducting energy storage. The simulation test results demonstrate that the design method can accomplish a more accurate signal tracking cut and that switching voltage generation estimation is performed well. It shows that the design method can meet the actual nonlinear control requirements of a superconducting energy storage device.

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Section: Device Modelingmentioning

confidence: 99%