Project's information

Project's title Study and manufacture active vibration isolation used for optical tweezers
Project’s code VAST01.05/17-18
Research hosting institution Institute of Mechanics
Project leader’s name Msc Nguyen Ba Nghi
Project duration 01/01/2017 - 31/12/2019
Project’s budget 600 million VND
Classify Excellent
Goal and objectives of the project - Build scientific base for active vibration isolation
- Design and manufacture a prototype of active vibration isolation.
- Design and manufacture an optical tweezers.
- Measure and experiment in the manufactured devices.
Main results
- Theoretical results:
+ Scientific base of semi-active and active vibration isolations.
+ Scientific base of optical tweezers.
+ Improved semi-active control algorithms for vibration isolation
+ Improved active control algorithms for vibration isolation
- Applied results:
+ Design and manufacture a prototype of active vibration isolation integrated with optical tweezers. 
+ Measure the ability of reducing vibration transmissibility and increasing vibration settling of vibration isolation.
+ Measure the ability of trapping object of optical tweezers.
Novelty and actuality and scientific meaningfulness of the results - Proposing of improvement of control algorithms fo vibration isolation.
- Design, manufacture and measure the prototype of active vibration isolation integrated with optical tweezers.
Products of the project

- Scientific papers in referred journals (list):
ISI papers:
- Viet, La Duc; Thi Tra My, Phan; Lower bound of performance index of an on-off damper in a state-space system, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 233, 12, 4288-4298, 2019
- La, Viet Duc; Phan, My Thi Tra; Optimization of two-tuning-knob single-sensor strategy for semi-active isolation, Journal of Sound and Vibration, 434, 126-143, 2018
National journal paper
- Nguyễn Thị Thanh Bảo, Đinh Văn Trung, Trần Ngọc Hưng, Đặng Tuyết Phương, Tổng hợp nano bạc dạng lăng trụ định hướng có mặt ion OH- bằng phương pháp plasmon, Tạp chí xúc tác và hấp phụ Việt Nam, T6, No4, tr 43-49, 2017
- Technological products (describe in details: technical characteristics, place):
Active vibration isolation
- Software controlled
- Support optical table with size up to 60cm120cm
- Low stiffness with large deformation springs, Support optical table with weight up to 100kg. 
- No resonance below 5Hz, reduce 73% vibration with frequency above 5Hz, reduce 82% vibration with frequency above 10Hz, high settling measure with feedback control, velocity spectrum below 300nm/(Hz)1/2 with frequency above 7Hz.
Optical tweezers
- Laser Nd:YAG, power 1W,
- Stiffness 0.1pN/nm
- Force resolution up to 1pN
- Object position accuracy up to 10nm

Images of project