Abstract
Self-sensing (or “sensorless”) control of Multi-layer piezoelectric actuators (MPA) displacement has attracted much attention lately, especially for low speed operation (i.e. below 100 Hz). For high speed operations using resonance frequencies (i.e. Diminished Haptics for the transformation of surface texture and Resonant-type Smooth Impact Drive mechanism for nano-positioning), it is not clear whether the resistor based self-sensing approach developed for low speed operation can be used to monitor the operation is at resonance or not. Thus, the main objective of this study is to find out the answer. Firstly, mathematical investigation was carried out. Then, experiments were designed and conducted revealing how to use resistor for self-sensing of MPA at high speed operation.
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