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- Energy Harvesting Aware Protocol (1)
- Load-carrying capacity; actuated microbeam; force microscopy; resonators;integrity; excitations; systems; model (1)
- Load-carrying capacity; integrity; systems; model (1)
- Mounted triaxial accelerometer; mechanical-shock; detection algorithm;smart sensor; microstructures; system (1)
- Self-Powered Wireless Sensor Networks (WSNs) (1)
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Mega: An Energy Aware Algorithm For Self-Powered Wireless Sensor Networks In Sustainable Smart Infrastructure, Dong Qi, Yu Chen, Shahrzad Towfighian
Mega: An Energy Aware Algorithm For Self-Powered Wireless Sensor Networks In Sustainable Smart Infrastructure, Dong Qi, Yu Chen, Shahrzad Towfighian
Mechanical Engineering Faculty Scholarship
Smart infrastructure is attractive for possessing many desirable features, such as uninterrupted monitoring of health conditions, timely response to damages, and human-infrastructure interactions. Embedded sensors that collectinformation are critical for decision making. However, the lifetime of electronic sensors is a constraint to infrastructure lifetime if sensors are physically embedded in the infrastructure at construction time. In this paper, we studied a self-powered wireless sensor network that harvests energy from mechan-ical vibration in the environment. A dynamic, hierarchical algorithm called MEGA is proposed that constructs clusters and elects the cluster head based on residue energy and energy harvest rate. Taking a …
Theoretical Prediction Of Experimental Jump And Pull-In Dynamics In A Mems Sensor, Laura Ruzziconi, Abdallah H. Ramini, Mohammad I. Younis, Stefano Lenci
Theoretical Prediction Of Experimental Jump And Pull-In Dynamics In A Mems Sensor, Laura Ruzziconi, Abdallah H. Ramini, Mohammad I. Younis, Stefano Lenci
Mechanical Engineering Faculty Scholarship
The present research study deals with an electrically actuated MEMS device. An experimental investigation is performed, via frequency sweeps in a neighbourhood of the first natural frequency. Resonant behavior is explored, with special attention devoted to jump and pull-in dynamics. A theoretical single degree-of-freedom spring-mass model is derived. Classical numerical simulations are observed to properly predict the main nonlinear features. Nevertheless, some discrepancies arise, which are particularly visible in the resonant branch. They mainly concern the practical range of existence of each attractor and the final outcome after its disappearance. These differences are likely due to disturbances, which are unavoidable …
Simple Fall Criteria For Mems Sensors: Data Analysis And Sensor Concept, Alwathiqbellah Ibrahim, Mohammad I. Younis
Simple Fall Criteria For Mems Sensors: Data Analysis And Sensor Concept, Alwathiqbellah Ibrahim, Mohammad I. Younis
Mechanical Engineering Faculty Scholarship
This paper presents a new and simple fall detection concept based on detailed experimental data of human falling and the activities of daily living (ADLs). Establishing appropriate fall algorithms compatible with MEMS sensors requires detailed data on falls and ADLs that indicate clearly the variations of the kinematics at the possible sensor node location on the human body, such as hip, head, and chest. Currently, there is a lack of data on the exact direction and magnitude of each acceleration component associated with these node locations. This is crucial for MEMS structures, which have inertia elements very close to the …
Jump And Pull-In Dynamics Of An Electrically Actuated Bistable Mems Device, Laura Ruzziconi, Stefano Lenci, Mohammad I. Younis
Jump And Pull-In Dynamics Of An Electrically Actuated Bistable Mems Device, Laura Ruzziconi, Stefano Lenci, Mohammad I. Younis
Mechanical Engineering Faculty Scholarship
This study analyzes a theoretical bistable MEMS device, which exhibits a considerable versatility of behavior. After exploring the coexistence of attractors, we focus on each rest position, and investigate the final outcome, when the electrodynamic voltage is suddenly applied. Our aim is to describe the parameter range where each attractor may practically be observed under realistic conditions, when an electric load is suddenly applied. Since disturbances are inevitably encountered in experiments and practice, a dynamical integrity analysis is performed in order to take them into account. We build the integrity charts, which examine the practical vulnerability of each attractor. A …