A miniaturized linear shaker system for MEMS sensor characterization

Jörg Encke; Wilfried Hortschitz; Andreas Kainz; Harald Steiner; Franz Keplinger; Thilo Sauter

doi:10.1117/12.2017405

17 May 2013 A miniaturized linear shaker system for MEMS sensor characterization

Jörg Encke, Wilfried Hortschitz, Andreas Kainz, Harald Steiner, Franz Keplinger, Thilo Sauter

Proceedings Volume 8763, Smart Sensors, Actuators, and MEMS VI; 876315 (2013) https://doi.org/10.1117/12.2017405
Event: SPIE Microtechnologies, 2013, Grenoble, France

Abstract

A miniaturised, piezoelectrically driven shaker system is presented which is suitable for MEMS characterisation in vacuum. It offers a broad frequency and amplitude range. The fully vacuum compatible shaker is constructed out of one single peace of aluminium with a piezo-stack-actuator working in-plane against four beam springs. It can easily be fabricated at low costs using a hand operated milling machine. The systems characteristics are easily tuned to different applications as the first resonance frequency is given by the stiffness of the beam springs and the mass of the moving shaker table. The utilised piezoelectric stack determines the maximum reachable amplitude for a given spring stiffness. Finite Element simulations have been carried out to design a at transfer characteristic of the shaker up to 10 kHz and amplitudes in the range from sub nanometres up to 1μm. The simulations were evaluated by laser vibrometer measurements of the shaker which also show a good linearity between electrical excitation signal and output deection amplitude. To account for other resonance frequencies introduced by a preexisting MEMS mounting device, the resulting vibration amplitude on the MEMS structure can be normalised by adjusting the electrical excitation amplitude with the help of a Polytec laser vibrometer.

Citation Download Citation

Jörg Encke, Wilfried Hortschitz, Andreas Kainz, Harald Steiner, Franz Keplinger, and Thilo Sauter "A miniaturized linear shaker system for MEMS sensor characterization", Proc. SPIE 8763, Smart Sensors, Actuators, and MEMS VI, 876315 (17 May 2013); https://doi.org/10.1117/12.2017405

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