On positive realness, negative imaginariness, and H∞ control of state-space symmetric systems

M Liu, J Lam, B Zhu, KW Kwok - Automatica, 2019 - Elsevier
This paper studies positive realness and negative imaginariness of state-space symmetric
systems. First, a necessary and sufficient condition is provided for a state-space symmetric …

Discrete Takagi-Sugeno fuzzy models applied to control the knee joint movement of paraplegic patients

R Gaino, MR Covacic, R Cardim, MAA Sanches… - Ieee …, 2020 - ieeexplore.ieee.org
In this manuscript, a method for designing Takagi-Sugeno (TS) fuzzy discrete-time
regulators based on linear matrix inequalities (LMIs) is proposed to control the variation of …

Lyapunov design of multivariable MRAC via generalized passivation

L Hsu, MC Minhoto Teixeira, RR Costa… - Asian Journal of …, 2015 - Wiley Online Library
A Lyapunov design of multiple input, multiple output (MIMO) model‐reference adaptive
control (MRAC) systems is proposed using new generalized passivity concepts based on …

Positive real and strictly positive real MIMO systems: theory and application

M Hakimi-Moghaddam - International Journal of Dynamics and Control, 2020 - Springer
The paper is dealing with the concept of positive real and strictly positive real properties of
linear time-invariant systems. Although strict positive realness is the most important subset of …

Robust T‐S Fuzzy Control of Electrostimulation for Paraplegic Patients considering Norm‐Bounded Uncertainties

MR Covacic, MC Minhoto Teixeira… - Mathematical …, 2020 - Wiley Online Library
This manuscript presents a Takagi–Sugeno fuzzy control for a mathematical model of the
knee position of paraplegic patients using functional electrical stimulation (FES). Each local …

Robust switched control based on strictly positive real systems and variable structure control techniques

R Cardim, MCM Teixeira, E Assunção… - … Journal of Adaptive …, 2016 - Wiley Online Library
This paper is concerned with the design of variable structure controllers for uncertain
switched linear plants. The proposed method is based on Lyapunov–Metzler inequalities …

Robust Control of the Knee Joint Angle of Paraplegic Patients considering Norm‐Bounded Uncertainties

NM Santos, R Gaino, MR Covacic… - Mathematical …, 2015 - Wiley Online Library
A proposal for the knee position control design of paraplegic patients with functional
electrical stimulation (FES) using control systems and considering norm‐bounded …

-Passive Systems and Control Application

JD Stefanovski - IEEE Transactions on Automatic Control, 2020 - ieeexplore.ieee.org
A class of F-passive descriptor systems is introduced, where F is also a descriptor system.
Time-domain and frequency-domain characterizations are presented, as well as properties …

Positive Real and Passive Control for Local Fractional Order Systems

S Zhang, L Yang, X Fan - 2024 43rd Chinese Control …, 2024 - ieeexplore.ieee.org
This paper is concerned with some theoretical results on positive real (PR) and passive
control for local fractional order linear systems with order α,0/ltα/lt1. PR Lemma and sufficient …

On LMI-based algorithm for strictly positive real systems with static output feedback

MCM Teixeira, MR Covacic, R Gaino… - … on Variable Structure …, 2022 - ieeexplore.ieee.org
This paper presents a new theoretical analyses and a condition regarding to an algorithm,
based on Linear Matrix Inequalities (LMIs), for finding a constant output feedback matrix K o …