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 …

A numerical approach for solving a class of variable-order fractional functional integral equations

FK Keshi, BP Moghaddam, A Aghili - Computational and Applied …, 2018 - Springer
This paper proposes new discretization techniques to estimate variable-order fractional
integral operators based on the piecewise integro quadratic spline interpolation. The …

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 …

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 …

Closed-form solution for the finite-horizon linear-quadratic control problem of linear fractional-order systems

A Dabiri, LK Chahrogh… - 2021 American Control …, 2021 - ieeexplore.ieee.org
This paper is devoted to finding an explicit solution for the finite-horizon linear-quadratic
regulator optimal control problem of linear time-invariant fractional-order systems based on …

A numerical approach for variable-order fractional unified chaotic systems with time-delay

S Yaghoobi, B Parsa Moghaddam… - … Methods for Differential …, 2018 - cmde.tabrizu.ac.ir
This paper proposes a new computational scheme for approximating variable-order
fractional integral operators by means of finite element scheme. This strategy is extended to …

Fractional delayed control design for linear periodic systems

A Dabiri, EA Butcher… - … and Information in …, 2016 - asmedigitalcollection.asme.org
In this paper, the fractional Chebyshev collocation (FCC) method is proposed to design
fractional delay controllers for linear systems with periodic coefficients. In our previous study …

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 …