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Optimization of passive cantilever-type tuned mass damper to reduce the hand postural tremor

Abstract : The involuntary tremor worsens the quality of Parkinson patient’s life and leads to reduced community ambulation. There are different medical and surgical methods that can lessen the tremor to improve patient's life quality, but each method has its weakness and may have high risks involving brain operation. As a result, mechanical treatment may be used as a good solution to suppress the tremor causing no serous side effect. The objective of this project is to manufacture a tuned vibration absorber that can be attached to the forearm to reduce involuntary tremor's angular motion in the hand of a Parkinson patient. A dynamic model of human hand can describe its bio-dynamic response at musculoskeletal level to solve numerically the problems related to tremor. The effective parameters of the dummy hand model are chosen to reflect that of a real patient. Then, the theoretical parameters of the passive, active and semi-active vibration controllers are designed to satisfy the tuning condition(s) of the patient. Finally, these controller devices are manufactured to be test experimentally. A comparison must be done between the uncontrolled and controlled measured angular displacements to check the ability of each device in reducing hand's fluctuation. In addition, a comparison can be done between the numerical and experimental tremor reduction caused by the real and theoretical vibration absorbers. The passive active and semi-active controllers are known to be classified according to their energy consumption. The Semi-active absorbers are attracting more research interest in the field of vibration control, since they preserve the reliability of the passive control with adjusting its parameter characteristics as done in the active control systems without great power consumption. With recent growth in the development of low-power electronic devices, the topic of energy harvesting has received much attention in the research community. Piezoelectric based on converting vibration energy to electrical energy has been most heavily researched. The project can be extended by designing a more advanced multi-functional energy harvesting device that can store energy and provide support to the structural loads
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Submitted on : Tuesday, June 22, 2021 - 3:10:11 PM
Last modification on : Wednesday, June 23, 2021 - 3:41:28 AM
Long-term archiving on: : Thursday, September 23, 2021 - 6:46:13 PM


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  • HAL Id : tel-03267529, version 1



Sarah Souheil Gebai. Optimization of passive cantilever-type tuned mass damper to reduce the hand postural tremor. Biomechanics []. Université Paris-Est; Université Libanaise Internationale, 2020. English. ⟨NNT : 2020PESC1014⟩. ⟨tel-03267529⟩



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