Flexible and vibrating structures are ubiquitous in many engineering areas and applications of civil, aerospace, mechanical, mechatronics, among others. Second-order differential equations are a natural form to describe their dynamical evolution in time, and its problem is often assessed using the quadratic eigenvalue problem (QEP). These structures can experiment harmful vibrations resulting from its interaction with the environment, as resonance and flutter oscillations, that if are not correctly controlled, can lead to the collapsing of the structure. In this scenario, the use of active vibration control (AVC) is an attractive option to mitigate such vibrations. Although its capacity in globally to control the structure, such techniques require a sophisticated apparatus, that include sensors and actuators. For several reasons, time delay can enter the picture when one applying AVC systems, as instances, spatial separations between the sensing point and the effectiveness point of actuation, delays in networked control systems and inherent delays of the communication, as in long sideral space distances. The control of such systems with time delay is a challenge, due to the infinite nature of the characteristic (quasi) polynomial, having an infinite number of roots. In general, the performance of AVC suffers severe degradation for the case in which the time delay must be taking into account. Efforts of the academic community have been made in the sense of recover the efficacy and effectiveness of AVC techniques in the presence of time delay, making then this topic as a state-of-the-art one. In this special issue of Mechanical Systems and Signal Processing, outstanding contributions comprising theory and experimental investigations on control of second-order vibrating systems with time delay are welcome. A nonexhaustive list of possible contributions includes:

- Design of AVC systems for flexible and vibrating structures in the presence of time delay;

- Stability analysis of AVC systems with time delay;

- Developing approximate and exact methods of design to vibrating systems with time delay;

- Time delay compensation applied to AVC systems;

- Control of vibrating systems under time-varying delays;

- Control of unstable vibrations in systems with time delay.

Before submission, the authors should carefully read over the journal’s Author Guidelines. Prospective authors should submit an electronic copy of their complete manuscript through the journal online submission system.

Important Dates

Submission Deadline: Apr 30th,2019

Anticipated publication: December 2019

Guest Editors

José M. Araújo, Researcher Leader, Research Group of Signal and Systems, Instituto Federal de Educação, Ciência e Tecnologia da Bahia, Salvador-BA, Brazil. araujo@ieee.org

Tito L.M. Santos, Researcher Leader, Research Group of Control Systems and Optimization, Universidade Federal da Bahia, Salvador-BA, Brazil. tlsantos@ufba.br

Biswa N. Datta, IEEE Fellow Distinguished Research Professor Northern Illinois University DeKalb, Illinois. dattab@math.niu.edu

https://www.journals.elsevier.com/mechanical-systems-and-signal-processing/call-for-papers/control-of-second-order-vibrating-systems-with-time-delay