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Project Description

Structures

Orbit jump through stifness tuning using low cost stifness modulation

Through application of proper signal on a piezoelectric element, an orbit jump effect is obtained in an energy-efficient way. This therefore permits ensuring optimal operation of the device.

More information can be found in this paper.

 

Self-tuning nonlinear rotational device

Thanks to the use of centrifugal effect in rotating device, interactions between two beams can be used to modulate the stiffness and thus adapting the resonance frequency to the actual frequency corresponding to the rotation. Nonlinear interactions can besides provide a mean of robust high-level oscillations.

 

References

  1. M. Lallart, L. Yan and A. Karami, Energy-efficient orbit jump technique for energy harvesting using nonlinear mechanical systems, International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA) 2018, Kobe, Japan, September 2018 (invited).
  2. L. Yan, M. Lallart and A. Karami, Low-Cost Orbit Jump in Nonlinear Energy Harvesters through Energy-Efficient Stiffness Modulation, Sens. Act. A: Phys., Vol. 285, pp. 676-684, 2019.
  3. L. Yan, C. Delaunay, M. Lallart and M. Collet, “Self-adjusting nonlinear energy harvesting system under rotational motion” International Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA) 2019, Lyon, France, October 2019.