Optimal control-based methodology for active vibration control of pedestrian structures
Civil structures such as floor systems with open-plan layouts or lightweight footbridges can be susceptible to excessive levels of vibrations caused by human activities. Active vibration control (AVC) via inertial-mass actuators has been shown to be a viable technique to mitigate vibrations, allowing structures to satisfy vibration serviceability limits. It is generally considered that the determination of the optimal placement of sensors and actuators together with the output feedback gains leads to a tradeoff between the regulation performance and the control effort. However, the "optimal" settings may not have the desired effect when implemented because simplifications assumed in the control scheme components may not be valid and/or the actuator/sensor limitations are not considered. This work proposes a design methodology for multi-input multi-output vibration control of pedestrian structures to simultaneously obtain the sensor/actuator placement and the control law. This novel methodology consists of minimising a performance index that includes all the significant practical issues involved when inertial-mass actuators and accelerometers are used to implement a direct velocity feedback in practice. Experimental results obtained on an in-service indoor walkway confirm the viability of the proposed methodology.
The authors acknowledge the financial support provided by the Fundación Caja Madrid through the grant “II Convocatoria de Becas de Movilidad para profesores de las universidades públicas de Madrid durante el curso académico 2012/2013” and also the UK Engineering and Physical Sciences Research Council (EPSRC) though grant EP/J004081/2 entitled “Advanced Technologies for Mitigation of Human-Induced Vibration”.
This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.
Vol. 80, pp. 153 - 162
Showing items related by title, author, creator and subject.
RESPOND (REducing Stress and Preventing Depression): comparing guided internet-based rumination focused cognitive behavioural therapy (i-RFCBT) versus a no-intervention control to prevent depression in high ruminating young adults, with adjunct assessment of the feasibility of unguided i-RFBCT: Study protocol for a phase III randomised-controlled trial Watkins, E.R; Cook, L (BioMed Central, 2016-01-04)Background: Depression is a global health challenge. Prevention is highlighted as a priority to reduce its prevalence. Although there are effective preventive interventions, efficacy and coverage can be improved. One ...
Nyawako, Donald S.; Reynolds, Paul (SAGE Publications, 2015)This study presents the results of vibration suppression of a walkway bridge structure with a single actuator and sensor pair by using a proportional-integral (PI) controller and observer-based pole- placement controllers. ...
Issa, Walid R. M. (University of ExeterRenewable Energy, 2015-03-10)The main focus of this PhD thesis is fundamental investigations into control techniques of inverter-based microgrids. It aims to develop new and improved control techniques to enhance performance and reliability. It focuses ...