Dynamic Sliding Mode Control of Spherical Bubble for Cavitation Suppression

Dynamic Sliding Mode Control of Spherical Bubble for Cavitation Suppression

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Cavitation is a disadvantageous phenomenon that occurs when fluid pressure drops below its vapor pressure.Under these conditions, bubbles form in the fluid.When these bubbles flow into a high-pressure area or tube, they erupt, causing harm to axe handle mechanical parts such as centrifugal pumps.

The difference in pressure in a fluid is the result of varying temperatures.One way to eliminate cavitation is to reduce the radius of the bubbles to zero before they reach high-pressure areas, using a robust approach.In this paper, sliding mode control is used for this purpose due to its invariance property.

To force the radius of the bubbles toward zero and prevent chattering, a new dynamic sliding mode control approach is used.In dynamic sliding mode control, chattering is removed by passing the input control through a low-pass filter, such as an integrator.A Portafilters general model of the spherical bubble is used, transferred to the state space, and then a state proportional-integral feedback is applied to obtain a linear system with a new input control signal.

A comparison is also made with traditional sliding mode control using state feedback, providing a trusted comparison.