scholarly journals SIMULATION OF A CLOSED SYSTEM OF A DC ELECTRIC DRIVE WITH A WIDTH-PULSE CONVERTER

2022 ◽  
Vol 1 (15) ◽  
pp. 42-47
Author(s):  
Mihail Dunaev ◽  
Sarfaroz Dovudov
Keyword(s):  
Electric Drive ◽  
Closed Loop ◽  
Reference Signal ◽  
Angular Speed ◽  
Power Losses ◽  
Closed Loop System ◽  
Pi Regulator ◽  
System A ◽  
Model Block ◽  
Pulse Converter

This article investigates the regulation of the angular speed of an electric drive (ED) with a pulse-width converter (PWC) and a direct current motor (DC motor) of independent excitation (NV) when controlled in a closed-loop system. A proportional-integral (PI) -regulator was used as a regulator of the angular velocity. To analyze the processes in the closed-loop SHIP-DPT system, the methods of simulation are used. The principle of operation of an electric drive with control from a PWM is described. Developed and modeled EP circuits with PWM in the Matlab environment using blocks from the Simulink / SimPowerSystem library. A model block has been modeled that calculates the static and dynamic power losses of the PWP IGBT. To calculate the static and dynamic losses, the method of approximating the loss graphs was used. The obtained mathematical dependences describe quite accurately the graphs of the power losses of the IGBT transistor. It is shown that when using a PI-controller, the angular speed of the electric drive is set according to a given speed reference signal.

Digital DC Speed Control System in Mine Hoist Application

2011 ◽  
Vol 219-220 ◽  
pp. 1017-1021
Author(s):  
Rui He ◽  
Yun Ping Ge
Keyword(s):  
Control System ◽  
Closed Loop ◽  
Speed Control ◽  
Closed Loop System ◽  
Pi Regulator ◽  
Control Precision ◽  
Speed Control System ◽  
Digital Trigger ◽  
Mine Hoist ◽  
Work Stability

Mine hoist shoulder important transport tasks. Through the analysis of the main circuit of mine hoist, this paper studies out ASCS digital DC speed control system whose core is microprocessor and whose hardware part constitutes digital trigger and double closed loop system. The software part not only achieves the system's digital PI regulator, logic switching, digital trigger phase shift, pulse channel selection and pulse width setting, but also realizes the systematic detection, monitoring, fault diagnosis, which improves the control precision and work stability of the system.

DETERMINING ROBUST PARAMETERS IN STABILIZING SET OF BACKSTEPPING BASED NONLINEAR CONTROLLER FOR SHIP COURSE KEEPING

2021 ◽  
Vol 158 (A3) ◽  
Author(s):  
X K Zhang ◽  
G Q Zhang
Keyword(s):  
Closed Loop ◽  
Simulation Experiment ◽  
Empirical Knowledge ◽  
Backstepping Method ◽  
Nonlinear Controller ◽  
Closed Loop System ◽  
Robust Performance ◽  
System A ◽  
Uniformly Asymptotic Stability ◽  
Novel Method

In order to solve the problem that backstepping method cannot effectively guarantee the robust performance of the closed-loop system, a novel method of determining parameter is developed in this note. Based on the ship manoeuvring empirical knowledge and the closed-loop shaping theory, the derived parameters belong to a reduced robust group in the original stabilizing set. The uniformly asymptotic stability is achieved theoretically. The training vessel “Yulong” and the tanker “Daqing232” are selected as the plants in the simulation experiment. And the simulation results are presented to demonstrate the effectiveness of the proposed algorithm.

Overnight automated type 1 diabetes control under MD-logic closed-loop system: a randomized crossover trial

2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
Revital Nimri ◽  
Thomas Danne ◽  
Olga Kordonouri ◽  
Eran Atlas ◽  
Natasa Bratina ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Closed Loop ◽  
Crossover Trial ◽  
Loop System ◽  
Diabetes Control ◽  
Closed Loop System ◽  
System A ◽  
Randomized Crossover Trial

scholarly journals Health professionals' views about who would benefit from using a closed‐loop system: a qualitative study

2020 ◽  
Vol 37 (6) ◽  
pp. 1030-1037 ◽  
Author(s):  
J. Lawton ◽  
B. Kimbell ◽  
D. Rankin ◽  
N. L. Ashcroft ◽  
L. Varghese ◽  
...  
Keyword(s):  
Qualitative Study ◽  
Health Professionals ◽  
Closed Loop ◽  
Loop System ◽  
Closed Loop System ◽  
System A

1009-P: Glucose Outcomes in Adult Patients with Type 1 Diabetes on a Hybrid Closed-Loop System: A Single Center Study

Diabetes ◽  
2020 ◽  
Vol 69 (Supplement 1) ◽  
pp. 1009-P
Author(s):  
STEPHANIE KIM ◽  
MARLENE BEDRICH ◽  
KRYSTAL KOBASIC ◽  
HAZEL CROSS ◽  
LAWRENCE FISHER ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Closed Loop ◽  
Loop System ◽  
Adult Patients ◽  
Single Center ◽  
Closed Loop System ◽  
System A ◽  
Single Center Study ◽  
Center Study

Glucose Control in Adults with Type 1 Diabetes Using a Medtronic Prototype Enhanced-Hybrid Closed-Loop System: A Feasibility Study

2019 ◽  
Vol 21 (9) ◽  
pp. 499-506 ◽  
Author(s):  
Melissa H. Lee ◽  
Sara Vogrin ◽  
Barbora Paldus ◽  
Hannah M. Jones ◽  
Varuni Obeyesekere ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Feasibility Study ◽  
Glucose Control ◽  
Closed Loop ◽  
Loop System ◽  
Closed Loop System ◽  
System A

A relaxed structural mechanics and fuzzy control for fluid–structure dynamic analysis

2019 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tim Chen ◽  
Safiullahand Khurram ◽  
CYJ Cheng
Keyword(s):  
Asymptotic Stability ◽  
Control Systems ◽  
Chaotic System ◽  
Global Asymptotic Stability ◽  
Design Methodology ◽  
Closed Loop ◽  
Fuzzy Controller ◽  
Closed Loop System ◽  
Content Type ◽  
System A

Purpose This paper aims to deal with the problem of the global stabilization for a class of tension leg platform (TLP) nonlinear control systems. Design/methodology/approach It is well-known that, in general, the global asymptotic stability of the TLP subsystems does not imply the global asymptotic stability of the composite closed-loop system. Findings An effective approach is proposed to control chaos via the combination of fuzzy controllers, fuzzy observers and dithers. Research limitations/implications If a fuzzy controller and a fuzzy observer cannot stabilize the chaotic system, a dither, as an auxiliary of the controller and the observer, is simultaneously introduced to asymptotically stabilize the chaotic system. Originality/value Thus, the behavior of the closed-loop dithered chaotic system can be rigorously predicted by establishing that of the closed-loop fuzzy relaxed system.

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