DESIGN OF AN ACTIVE LOW FREQUENCY VIBRATION ISOLATION SYSTEM FOR ATOM INTERFEROMETRY BY USING SLIDING MODE CONTROL

Authors

  • Dong-Yun Luo Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou, China
  • Bing Cheng Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou, China
  • Bin Wu Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou, China
  • Xiao-Long Wang Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou, China
  • Qiang Lin Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou, China

DOI:

https://doi.org/10.14311/CEJ.2017.04.0037

Keywords:

Active vibration isolation, Low frequency vibration, Sliding control, Atom interferometry

Abstract

Active vibration isolation is gaining increased attention in the ultra-high precision application of atom interferometry to effectively treat the unavoidable ground vibration. In this system, a digital control subsystem is used to process and feedback the vibration measured by a seismometer. A voice coil actuator is used to control and cancel the motion of a commercial passive vibration isolation platform. The system level simulation model is established by Simulink software, The simulation results demonstrate the asymptotic stability of the system and the robustness of the control algorithm. Compared with the conventional lead–lag compensation type controller, the algorithm adopted uses sliding mode control, taking advantage of its easy computer implementation and its robust high performance properties. With the feedback path closed, the system acts like a spring system with a natural resonance frequency of 0.02 Hz. The vibration noise in the vertical direction is about 20 times reduced during 0.1 and 2 Hz, The experimental results verify that the isolator has significant vibration isolation performance, and it is very suitable for applications in high precision gravity measurement.

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Published

2017-12-31

How to Cite

Luo, D.-Y., Cheng, B., Wu, B., Wang, X.-L., & Lin, Q. (2017). DESIGN OF AN ACTIVE LOW FREQUENCY VIBRATION ISOLATION SYSTEM FOR ATOM INTERFEROMETRY BY USING SLIDING MODE CONTROL. Stavební Obzor - Civil Engineering Journal, 26(4). https://doi.org/10.14311/CEJ.2017.04.0037

Issue

Vol. 26 No. 4 (2017)

Section

Articles

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