Project

The Virtual Mechanical System control law for nonlinear vibration control: exploiting nonlinear normal modes for fast energy redistribution

Code
1147925N
Duration
01 November 2024 → 31 October 2028
Funding
Research Foundation - Flanders (FWO)
Research disciplines
  • Engineering and technology
    • Control engineering
    • Acoustics, noise and vibration engineering
Keywords
Nonlinear normal modes Energy redistribution Active vibration control
 
Project description

As industries strive for sustainability, the use of lightweight flexible materials and complex designs to save energy also introduces nonlinearities and vibrations. In order not to invoke damage or sacrifice accuracy and speed, a revolutionary innovation of vibration control techniques is needed. While nonlinearities present challenges, they also offer opportunities. More specifically, Nonlinear Normal Modes (NNMs) exhibit energy redistribution properties, altering both frequency and spatial energy distribution. Leveraging this can enable rapid energy transfer to advantageous regions. Building upon the success of the Virtual Mechanical System (VMS) control law in linear scenarios, which efficiently transfers energy to a virtual system to mitigate vibrations in the host system, this project seeks to explore its application in nonlinear contexts. As thus, using the VMS controller to - for the first time - exploit NNMs to induce a previously absent advantageous energy flow. The project aims to investigate both the transfer of vibration energy to a virtual system as to a passive vibration absorber. Combining active and passive vibration control strategies, called hybrid control, is particularly interesting for decreasing energy needs of actuators. This groundbreaking endeavour aims to harmonise the state-of-the-art of active control and nonlinear dynamics to create a novel vibration control framework, and so, paving the way for more efficient and sustainable industrial practices.