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Digital synthetic impedance for application in vibration damping
J Nečásek1, J Václavík1, P Marton1
1Institute of Mechatronics and Computer Engineering, Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentská 2, Liberec, Czech Republic.
The Review of Scientific Instruments
|March 3, 2016
Summary
This study details a compact digital synthetic impedance device for vibration damping. The precision device accurately synthesizes target impedances and offers fine-tuning capabilities for enhanced performance.
Area of Science:
- Engineering
- Control Systems
- Materials Science
Background:
- Vibration damping is critical in many mechanical systems.
- Precisely controlling impedance is essential for effective vibration damping.
- Existing methods may lack the required precision, compactness, or tunability.
Purpose of the Study:
- To present the design and construction of a digital synthetic impedance device.
- To evaluate the performance and fine-tuning capabilities of the device.
- To demonstrate its application in vibration damping using a piezoelectric actuator.
Main Methods:
- Development of a compact digital synthetic impedance device utilizing an ARM microcontroller.
- Integration of external Analog-to-Digital (AD) and Digital-to-Analog (DA) converters.
- Implementation of a specialized analog front-end for signal processing.
- Testing performance by comparing synthesized impedance against prescribed values.
- Demonstration on a 1D spring-mass system with a piezoelectric actuator.
Main Results:
- The device demonstrated a very good match between synthesized and prescribed impedances.
- Fine-tuning capability was confirmed, with steps as small as 0.1% for complex structures.
- Performance exceeded direct measurability limits for less complex impedance structures.
- Successful application in a vibration damping scenario was shown.
Conclusions:
- The developed digital synthetic impedance device is precise, standalone, and compact.
- It offers excellent performance and crucial fine-tuning abilities for vibration damping.
- The device shows significant potential for advanced vibration control applications.
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