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Publikováno v:
Latin American Journal of Solids and Structures v.17 n.7 2020
Latin American journal of solids and structures
Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)
instacron:ABCM
Latin American journal of solids and structures
Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)
instacron:ABCM
Although various numerical methods are proposed to solve a wide range of problems so far, each has its own advantages and disadvantages. Therefore, it would be highly desirable to develop a computationally efficient combined approach, which makes use
Autor:
Hadi Najar
Publikováno v:
2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII).
This paper reports a novel, rapid and economical approach to calibrate barometric micromechanical capacitive pressure sensors via electrical measurement only using a machine learning approach. Conventional calibration approaches that use physical mea
Autor:
Shih Wei-Yan, Suman Bellary, Michael Zwerg, Scott R. Summerfelt, Nagaraj Krishnasawamy, Sudhanshu Khanna, Juergen Luebbe, Steven Bartling, Brian Elies, Hadi Najar
Publikováno v:
ISSCC
Ultra-low Power Microcontrollers (MCUs) [1]–[4] have played a central role in embedded IoT systems providing programmability, analog and digital processing and control, A/D interfaces, and power management. As IoT applications expand, efficient sen
Publikováno v:
Journal of Microelectromechanical Systems. 24:2152-2160
This paper reports an investigation into the various dissipation mechanisms that can affect polycrystalline diamond micromechanical resonators. Double-ended tuning fork and cantilever resonators were fabricated from 1–5- $\mu \text{m}$ thick microc
Publikováno v:
2015 28th IEEE International Conference on Micro Electro Mechanical Systems (MEMS).
This paper reports a 1.5 mm batch-fabricated polycrystalline diamond Cylindrical Resonator (CR) for gyroscope applications. The device is fabricated in a cylindrical shape using silicon on insulator (SOI) wafers and deep reactive ion etching (DRIE),
Autor:
T.-H Su, Liwei Lin, Amir Heidari, Chen Yang, D. Saito, David A. Horsley, Gerardo Jaramillo, Hadi Najar, Sina Akhbari, Parsa Taheri-Tehrani, Sarah H. Nitzan
Publikováno v:
2014 Solid-State, Actuators, and Microsystems Workshop Technical Digest.
Autor:
Liwei Lin, Chen Yang, K. van Benthem, David A. Horsley, Stephanie Fung, Hadi Najar, Andrew M. Thron
Publikováno v:
2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS).
This paper reports an investigation of microcrystalline diamond (MCD) films deposited under different conditions to increase thermal conductivity and therefore mechanical quality factor (Q) in micromechanical resonators. Through a study of different
Autor:
Peter Fonda, Parsa Taheri-Tehrani, Hsueh-An Yang, Hadi Najar, Liwei Lin, Amir Heidari, Gerardo Jaramillo, Mei-Lin Chan, David A. Horsley, Kazuo Yamazaki
Publikováno v:
2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII).
The hemispherical resonator gyro (HRG) is low loss and high stability, spurring recent interest in micro-scale hemispherical resonators. To achieve mode-matching and high-Q performance in a hemispherical resonator, geometric symmetry in combination w
Autor:
Mitchell Kline, Burak Eminoglu, Hadi Najar, Yu-Ching Yeh, M. Daneman, David A. Horsley, Bernhard E. Boser
Publikováno v:
2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS).
A dual mass vibratory gyroscope sensor demonstrates the quadrature frequency modulated (QFM) operating mode, where the frequency of the circular orbit of a proof mass is measured to detect angular rate. In comparison to the mode-matched open loop rat