Development of a performance-enhanced hybrid magnetorheological elastomer-fluid for semi-active vibration isolation: Static and dynamic experimental …

A Ali, AMH Salem, AGA Muthalif, RB Ramli, S Julai - Materials, 2022 - mdpi.com
Magnetorheological elastomers (MREs) are a class of emerging smart materials in which
their mechanical and rheological properties can be immediately and reversibly altered upon …

Experimental nonlinear control for flutter suppression in a nonlinear aeroelastic system

S Jiffri, S Fichera, JE Mottershead… - Journal of Guidance …, 2017 - arc.aiaa.org
Experimental implementation of input–output feedback linearization in controlling the
dynamics of a nonlinear pitch–plunge aeroelastic system is presented. The control objective …

Detection of subcritical Hopf and fold bifurcations in an aeroelastic system via the Describing Function method

D Martini, G Innocenti, A Tesi - Chaos, Solitons & Fractals, 2022 - Elsevier
The paper deals with Limit Cycle Oscillations (LCOs) in a Pitch & Plunge model of the wing
dynamics, where the stiffness on the plunge displacement is assumed to be an odd fifth …

Magnetorheological elastomer-based variable stiffness flexible coupling for vibration isolation

TMI Syam, AAA Hegazi, AGA Muthalif… - Transactions of the …, 2021 - cdnsciencepub.com
Rotating mechanical equipment such as pumps and motors can suffer from unattenuated
torsional vibration. The causes of such vibration range from imbalance within the rotating …

[HTML][HTML] Experimental feedback linearisation of a vibrating system with a non-smooth nonlinearity

D Lisitano, S Jiffri, E Bonisoli, JE Mottershead - Journal of Sound and …, 2018 - Elsevier
Input-output partial feedback linearisation is demonstrated experimentally for the first time on
a system with non-smooth nonlinearity, a laboratory three degrees of freedom lumped mass …

On the use of linear and nonlinear controls for mechanical systems subjected to friction-induced vibration

B Chomette, JJ Sinou - Applied Sciences, 2020 - mdpi.com
Friction-Induced Vibration and noisE (FIVE) is still a complex and nonlinear physical
phenomenon which is characterized by the appearance of instabilities and self-sustained …

[PDF][PDF] Active control of a flexible wing in the presence of gusts and nonlinearity

JD Ellis, S Jiffri, MI Friswell… - 19th International Forum on …, 2022 - researchgate.net
This work explores the closed-loop response of the MODFLEX flexible wing in the presence
of 1–cosine gusts. The ultimate aim of the project is to investigate the effects of gusts on a …

Feedback linearization in systems with nonsmooth nonlinearities

S Jiffri, P Paoletti, JE Mottershead - Journal of Guidance, Control, and …, 2016 - arc.aiaa.org
This paper aims to elucidate the application of feedback linearization in systems having
nonsmooth nonlinearities. With the aid of analytical expressions originating from classical …

Nonlinear control of an aeroelastic system with a non-smooth structural nonlinearity

S Jiffri, JE Mottershead - … and Technology of Machinery: Proceedings of …, 2015 - Springer
Non-smooth nonlinearities such as freeplay, bilinear/piece-wise linear stiffness are among
the various types of nonlinearity that have been encountered in aeroelastic systems …

Nonlinear aeroservoelastic control design and validation

I Isnardi, P Paoletti, D Miranda, G Innocenti… - 2018 AIAA Guidance …, 2018 - arc.aiaa.org
This paper presents the numerical investigation and experimental validation of a feedback
linearization control technique for suppression of limit cycle oscillations in an aeroelastic …