Precision and Stability in Hydrostatic Transmissions with Robust H∞ Control Under Parametric Uncertainties

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dc.contributor.authorMishra, Santosh Kr.
dc.contributor.authorWrat, Gyan
dc.contributor.authorRanjan, Prabhat
dc.contributor.authorJose, Joseph T.
dc.contributor.authorDas, Jayanta
dc.date.accessioned2026-10-23T06:02:43Z
dc.date.available2026-10-23T06:02:43Z
dc.date.issued2025-05-13
dc.description.abstractHydrostatic transmissions are essential in applications demanding variable torque and speed, such as mining and agricultural machinery, due to their compact design, high power-to-weight ratio, and efficient variable speed control. Despite these advantages, their inherent nonlinearities and susceptibility to parametric uncertainties pose significant challenges for precise motion control. This study presents a comparative analysis of classical PID and robust H-infinity controllers for regulating the speed of hydraulic motors under varying torsional loads. A linearized uncertain system model is developed using upper Linear Fractional Transformations (LFTs) to capture key parametric uncertainties. A simplified H-infinity controller is designed to robustly manage system dynamics, particularly addressing phase lags induced by uncertain loads. Simulation results demonstrate that the H-infinity controller offers superior performance over the PID controller in terms of stability, disturbance rejection, and robustness to load fluctuations. This work contributes a practically viable robust control solution for improving the reliability and precision of electro-hydraulic systems, particularly in demanding, real-world environments.
dc.identifier.issn28134648
dc.identifier.urihttps://doi.org/10.3390/jeta3020014
dc.identifier.urihttp://nitt.ndl.gov.in/handle/123456789/338
dc.language.isoen
dc.publisherMultidisciplinary Digital Publishing Institute (MDPI)
dc.relation.ispartofseriesJournal of Experimental and Theoretical Analyses; Vol. 3/ No. 2/ Art. 14
dc.titlePrecision and Stability in Hydrostatic Transmissions with Robust H∞ Control Under Parametric Uncertainties
dc.typeArticle
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