Time-division multiplexing is used as a method to reduce the number of amplifiers needed in active vibration control systems that use piezoelectric actuators

Abstract

The high-tech industry is constantly searching for methods to make more efficient, more accurate, and faster machines. One of the methods to improve the performance of these machines is active vibration control(AVC) which can help to achieve faster transient responses. One of the ways to achieve this is better controllability which means more actuators to control more modes. These actuators are mostly Piezo transducers in AVC and each group of actuators needs a high voltage amplifier. At some point, the number of amplifiers will be limited by factors such as volume or mass, so if the group of actuators can share an amplifier, that would be beneficial. This can be achieved with time-division multiplexing(TDM). This method in combination with AVC is researched in this thesis. The most important aspects are performance comparison to conventional systems without multiplexing. First, some simulations are done, to show that the TDM is a feasible solution, secondly, a setup is built to check performance and validate the simulations.