Tohoku University Technology: Q factor trimming for Oscillator: T19-369
adjust the Q factor of multiple orthogonal modes
Although the Q factors of the 2D oscillator used in gyroscope must be matched in the x and y axial directions, they may differ slightly due to manufacturing error, etc. Thus, Q factor in each x and y axial direction needs to be matched independently. In a oscillator, vibration generates heat flow which affects the Q factor (thermoelastic loss). Therefore, it is possible to adjust the Q factor by adding a heat flow path in the structure or by blocking the heat flow. The 2D oscillator of this invention has a pre-fabricated machinable part to control the heat flow without changing significantly the stiffness, in addition to its basic structure. The Q factors in the 1st and 2nd modes, which are orthogonal to each other, can be controlled independently by cutting this machinable part appropriately.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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