Classification of the nonlinear dynamics in an initially curved bistable micro/nano-electro-mechanical system resonator

Micro & nano letters

article

Farid Tajaddodianfar¹  Mohammad Reza Hairi Yazdi¹  Hossein Nejat Pishkenari²  Ehsan Maani Miandoab¹  Hassen M. Ouakad³ 

[1] School of Mechanical Engineering, College of Engineering, University of Tehran;School of Mechanical Engineering, Sharif University of Technology;Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals

关键词: nanoelectromechanical devices;    micromechanical resonators;    Galerkin method;    vibrations;    chaos;    bistable MEMS resonator;    filtering functionality;    hysteresis loops;    arch-shaped microbeam;    snap-through instability;    large amplitude vibrations;    chaos;    nonlinear phenomena;    potential energy function;    electrostatic force;    Galerkin's decomposition method;    single degree of freedom model;    DC electrostatic parallel plate held;    AC electrostatic parallel plate held;    arch-shaped microbeam;    bistable microelectromechanical system resonator;    bistable nanoelectromechanical system resonator;    nonlinear dynamics;   

DOI  :  10.1049/mnl.2015.0087

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Background: A variety of minimally invasive techniques (chemonucleolysis, laser, automated percutaneous discectomy, percutaneous manual nucleotomy) have been invented over the years, as treatment of low back pain related to disc disease. Automated percutaneous lumbar dissectomy (APLD), being one of these techniques, is a modality in which removal of nucleus pulposus, reduces intradiscal pressure thus relieves the nerve root compression and subsequently reduces radicular pain. This technique was introduced by Onik in 1985, referred to as ‘automated’ since it involves a mechanical probe, working by a ‘suction and cutting action for removal of the nucleus pulposus. Methodology: After meeting the inclusion criteria, minimal invasive procedure – APLD, performed in between 2012 to 2015 on 120 patients on outdoor basis. Radicular discogenic pain was confirmed by MRI and clinical finding, procedure is being performed using nucleotome under fluoroscopic guidance. Result: Based on patient satisfaction, 72 (60%) patients had excellent pain relief (75 – 100%), 34 (28.3%) had good pain relief (51–74%) whereas 14 (11.7%) patients had poor pain relief. Two (1.6%) patient developed discitis, which was the only complication and it resolved within fifteen days without sequelae. Conclusion: Percutaneous decompression (APLD) techniques for intervertebral disc herniation are safe and cost-effective techniques with significant and long lasting results concerning pain reduction and mobility improvement. They can be proposed as initial treatment or attractive alternatives prior to major surgery.

【 授权许可】

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