Vibration Control of an Optical Table by Mechatronic Network and Piezoelectric Transducers
Date Issued
2011
Date
2011
Author(s)
Yang, San-Ho
Abstract
This paper proposes the design and control of an optical table, Which needs to isolate two main vibration sources, namely load disturbances from the machine and ground disturbance from the environment. However, the suspension settings to suppress these two disturbances are conflicting: they need to be soft for the ground disturbances but stiff for the load disturbances. Therefore, we apply disturbance response decoupling techniques to independently treat these two vibration sources.
First, we apply passive I-2000 pneumatic LabLegsTM and the spring-damper sets to insulate the ground disturbance in a passive way and use piezoelectric transducers as active actuators to improve load responses, because of their properties, such as high accuracy and large driving force.
Second, we apply a new mechatronic network to replace I-2000, because the suspension settings of I-2000 cannot be easily adjusted for performance improvement. The mechatronic network can be connected to suitable electric circuits for performance optimization.
Lastly, we apply inverse control structures to the optical table: suppressing the load disturbances by the hard passive elements, and isolating the ground disturbances by active control.
From the simulation and experimental results, the designs are deemed effective.
Subjects
Disturbance Response Decoupling
mechatronic suspension system
piezoelectric transducers
vibration control
optical table
Type
thesis
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