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Wednesday, July 10 • 10:30 - 10:50

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Reduction of low frequency noise generated by devices is an important problem. Passive noise reduction methods require thick and heavy barriers to be effective for low frequencies. Active control of casing walls provides much higher low frequency noise reduction, and in such system, compared to classical Active Noise Control systems, a global noise reduction is possible. Active systems, however, require additional power and are quite expensive. Shunt systems offer another alternative. In the shunt system the controlled mechanical system is coupled with the electrical circuit, usually using piezoelectric effect, and a control law is implemented in an electrical circuit. The whole shunt system can be passive, semi-active or active. In this paper the passive shunt system will be investigated for application to a cubic casing with a rigid frame. The passive system is proposed due to simplicity in applications, and the fact that no additional power source is required. Synchronized switch damping on inductor (SSDI) control law is implemented using a simple electronic circuit. The performance of the resulting system is verified by simulations, and obtained results are presented.


Marek Pawelczyk

Prof., Silesian University of Technology, Institute of Automatic Control
Head of Measurements and Control Systems Dept., Vice Rector for Science and Development. Interest: active and semi-active noise and vibration control


Wednesday July 10, 2019 10:30 - 10:50 EDT
Westmount 6
  T02 Act. noise & vib. cntrl., SS02 Algorithms for active control