TY - JOUR
T1 - Bounded Integral Controller With Limited Control Power for Nonlinear Multiple-Input Multiple-Output Systems
AU - Wang, Yeqin
AU - Ren, Beibei
AU - Zhong, Qing Chang
AU - Dai, Jiguo
N1 - Publisher Copyright:
IEEE
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020
Y1 - 2020
N2 - In this brief, a bounded integral controller (BIC) with limited control power is proposed for a class of nonlinear multiple-input multiple-output (MIMO) systems. The sum-of-squares constraint on the control inputs with time-varying weights is studied and handled through the BIC design, which guarantees that both the control inputs and an auxiliary time-varying variable are dynamically constrained on a designed control circle. The BIC inherits the properties of the traditional integral controller to eliminate tracking errors and achieve disturbance rejections. Even under time-varying input weights, the BIC guarantees limited control power independently of both plant information and system states. The input-to-state (practical) stability of the closed-loop system is established. To demonstrate the effectiveness of the proposed method, experimental validations are conducted for two systems: a system with multiple dc motors subject to a power limit with time-varying input weights and a permanent magnet synchronous motor system subject to a voltage limit with time-invariant input weights.
AB - In this brief, a bounded integral controller (BIC) with limited control power is proposed for a class of nonlinear multiple-input multiple-output (MIMO) systems. The sum-of-squares constraint on the control inputs with time-varying weights is studied and handled through the BIC design, which guarantees that both the control inputs and an auxiliary time-varying variable are dynamically constrained on a designed control circle. The BIC inherits the properties of the traditional integral controller to eliminate tracking errors and achieve disturbance rejections. Even under time-varying input weights, the BIC guarantees limited control power independently of both plant information and system states. The input-to-state (practical) stability of the closed-loop system is established. To demonstrate the effectiveness of the proposed method, experimental validations are conducted for two systems: a system with multiple dc motors subject to a power limit with time-varying input weights and a permanent magnet synchronous motor system subject to a voltage limit with time-invariant input weights.
KW - Bounded integral controller (BIC)
KW - Control systems
KW - DC motors
KW - Integral equations
KW - MIMO communication
KW - Synchronous motors
KW - Time-varying systems
KW - Voltage control
KW - limited control power
KW - multiple-input multiple-output (MIMO)
KW - sum-of-squares constraint
KW - time-invariant input weights
KW - time-varying input weights.
UR - http://www.scopus.com/inward/record.url?scp=85086002433&partnerID=8YFLogxK
U2 - 10.1109/TCST.2020.2989691
DO - 10.1109/TCST.2020.2989691
M3 - Article
AN - SCOPUS:85086002433
JO - IEEE Transactions on Control Systems Technology
JF - IEEE Transactions on Control Systems Technology
SN - 1063-6536
ER -