Continuous development of 3D printing technologies enables flexible development and production of smart structures in one process.
The work includes the process of designing and manufacturing a 3D printed device capable of balancing stiff rotors via dynamic balancing. The design started with a numerical parametric model. Using a parametric model, the influence of individual parameters on the natural frequencies of the entire composition was identified. The device was made up of several 3D printed pieces. Sensors for measuring dynamic forces in bearings were 3D printed from a conductive filament that exhibits piezoresistive properties. After the device was manufactured, the measurement of its own frequencies followed, thereby determining the useful range of operation. Afterwards, sensitivities of piezoresistive sensors were measured. After the device calibration, an attempt was made to identify the known imbalance on the rotor. After the successful identification of the imbalance, an attempt was made to dynamically balance the rotor by adding mass, whereby the rotor was previously statically balanced. The manufactured device does not allow precise dynamic balancing at this point.
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