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Multidimensional Vibration Suppression Method with Piezoelectric Control for Wind Tunnel Models.

Mengde Zhou1, Wei Liu2, Linlin Tang3

  • 1Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116024, China. mengde@mail.dlut.edu.cn.

Sensors (Basel, Switzerland)
|September 19, 2019
PubMed
Summary

A novel multidimensional vibration suppression method using piezoelectric actuators and velocity feedback improves wind tunnel test data quality and safety. This active control system effectively reduces low-frequency, large-amplitude vibrations from any direction.

Keywords:
accelerometerdampingmultidimensional active controlstackable piezoelectric actuatorwind tunnel

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Area of Science:

  • Aerospace Engineering
  • Mechanical Engineering
  • Control Systems

Background:

  • Low-frequency, large-amplitude vibrations in cantilever sting systems compromise wind tunnel test data accuracy.
  • Such vibrations can pose significant safety risks during wind tunnel testing operations.

Purpose of the Study:

  • To develop and validate a multidimensional vibration suppression method for cantilever sting systems.
  • To enhance the quality and safety of wind tunnel test data by mitigating vibrations from any direction.

Main Methods:

  • Derivation of the cantilever sting system's motion equation using Hamilton's principle and assumed mode method.
  • Implementation of a multidimensional active control mechanism with stackable piezoelectric actuators and velocity feedback using accelerometers.
  • Application of a negative velocity feedback control algorithm combined with RMS evaluation and a weight modification method for real-time control adjustments.

Main Results:

  • Laboratory experiments demonstrated a >4.3-fold increase in damping ratio and >23 dB reduction in spectrum analyses.
  • Wind tunnel tests showed residual vibrations below 1.53 g under various conditions (e.g., 0.6-0.7 Mach number, specific angles of attack and yaw).

Conclusions:

  • The proposed multidimensional vibration suppression method effectively mitigates vibrations from any direction.
  • The system ensures the smooth progression of wind tunnel tests by improving data quality and operational safety.