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

2021 ◽  
Vol 158 (A3) ◽  
Author(s):  
G Q Zhang ◽  
X K Zhang
Keyword(s):  
Closed Loop ◽  
Empirical Knowledge ◽  
Nonlinear Controller ◽  
Closed Loop System ◽  
Ship Maneuvering ◽  
System A ◽  
Uniformly Asymptotic Stability ◽  
Nomoto Model ◽  
Novel Method ◽  
Backstepping Algorithm

The authors have addressed an important topic that is needed for backstepping algorithm to guarantee the robust performance of the closed-loop system. A novel method of determining parameters was presented based on ship maneuvering empirical knowledge and closed-loop shaping theory, and theoretical proof had shown the uniformly asymptotic stability of an established nonlinear Nomoto model. However, the following important points are suggested for the improvement of this paper.

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.

Stable Nonlinear Control Allocation for Aircraft with Multiple Control Effectors

2011 ◽  
Vol 138-139 ◽  
pp. 404-409 ◽  
Author(s):  
Heng Li ◽  
Jin Yong Yu ◽  
You An Zhang
Keyword(s):  
Closed Loop ◽  
Dynamic Control ◽  
Lyapunov Stability Theory ◽  
Invariant Set ◽  
Control Law ◽  
Control Allocation ◽  
Nonlinear Controller ◽  
Closed Loop System ◽  
Multiple Control ◽  
Simulation Results

With respect to aircraft with redundant multiple control effectors, a nonlinear controller, which is composed of a virtual control law and a dynamic control allocation with position constraints of each effector, is designed. Based on Lyapunov stability theory and LaSalle invariant set theorem, asymptotic stabilities of upper control subsystem, dynamic control allocation subsystem and overall closed-loop system are proved respectively. Simulation results show the effectiveness of the proposed method.

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

Global Stabilization for a class of nonlinear fractional-order systems

2019 ◽  
Vol 10 (01) ◽  
pp. 1941009 ◽  
Author(s):  
Taide Liu ◽  
Feng Wang ◽  
Wanchun Lu ◽  
Xuhuan Wang
Keyword(s):  
Lyapunov Function ◽  
Fractional Order ◽  
Closed Loop ◽  
The State ◽  
Loop System ◽  
Global Stabilization ◽  
Fractional Order Systems ◽  
Closed Loop System ◽  
Integer Order ◽  
Backstepping Algorithm

The problem of Mittag–Leffler stabilization (MLS) is studied for a class of nonlinear non-integer order systems. The stabilizer is constructed by using the Lyapunov function and backstepping algorithm. The continuous controller is designed to ensure that the state of the nonlinear fractional-order closed-loop system converges to the equilibrium. Two simulation examples are given to illustrate the effectiveness of the method.

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
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