Coefficient of restitution in fractional viscoelastic compliant impacts using fractional Chebyshev collocation

A Dabiri, EA Butcher, M Nazari - Journal of Sound and Vibration, 2017 - Elsevier
Compliant impacts can be modeled using linear viscoelastic constitutive models. While such
impact models for realistic viscoelastic materials using integer order derivatives of force and …

Efficient modified Chebyshev differentiation matrices for fractional differential equations

A Dabiri, EA Butcher - … in Nonlinear Science and Numerical Simulation, 2017 - Elsevier
This paper compares several fractional operational matrices for solving a system of linear
fractional differential equations (FDEs) of commensurate or incommensurate order. For this …

Optimal periodic-gain fractional delayed state feedback control for linear fractional periodic time-delayed systems

A Dabiri, EA Butcher, M Poursina… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
This paper develops the fundamentals of optimal-tuning periodic-gain fractional delayed
state feedback control for a class of linear fractional-order periodic time-delayed systems …

A robust algorithm for nonlinear variable-order fractional control systems with delay

J António Tenreiro Machado… - International Journal of …, 2018 - degruyter.com
In this paper, we propose a high-accuracy linear B-spline finite-difference approximation for
variable-order (VO) derivative. We consider VO fractional differentiation as a control …

Time analysis of forced variable-order fractional Van der Pol oscillator

BP Moghaddam, JA Tenreiro Machado - The European Physical Journal …, 2017 - Springer
This paper presents a new discretization technique for the forced Van der Pol oscillator with
variable order derivatives. The study introduces the variable-order fractional time derivatives …

Stability and control of fractional periodic time-delayed systems

EA Butcher, A Dabiri, M Nazari - Time delay systems: theory, numerics …, 2017 - Springer
In this chapter, two new methods are proposed to study the stability of linear fractional
periodic time-delayed (FPTD) systems. First, the explicit harmonic balance (EHB) method is …

Optimal observer-based feedback control for linear fractional-order systems with periodic coefficients

A Dabiri, EA Butcher - Journal of Vibration and Control, 2019 - journals.sagepub.com
This paper proposes a new technique to design an optimal observer-based feedback control
for linear fractional-order systems with constant or periodic coefficients. The proposed …

Chaos analysis and control in fractional order systems using fractional Chebyshev collocation method

A Dabiri, M Nazari, EA Butcher - ASME …, 2016 - asmedigitalcollection.asme.org
In this paper, fractional Chebyshev collocation method is proposed to study Lyapunov
exponents (LEs) and chaos in a fractional order system with nonlinearities. For this purpose …

Adaptive neural-fuzzy inference system to control dynamical systems with fractional order dampers

A Dabiri, M Nazari, EA Butcher - 2017 American Control …, 2017 - ieeexplore.ieee.org
In this paper, an adaptive neural fuzzy inference system (ANFIS)-based control technique is
proposed to stabilize dynamical systems with fractional order dampers. For this purpose, a …

Dynamics and optimal control of multibody systems using fractional generalized divide-and-conquer algorithm

A Dabiri, M Poursina, JAT Machado - Nonlinear Dynamics, 2020 - Springer
In this paper, a new framework is presented for the dynamic modeling and control of fully
actuated multibody systems with open and/or closed chains as well as disturbance in the …