TY - JOUR
AU1 - Kralev, Jordan
AU2 - Mitov, Alexander
AU3 - Slavov, Tsonyo
AB - Hydraulic spool valve, pilot operated with bi-state switching micro valves is a low-cost alternative to the conventional proportional and high-response valves. However, high-frequency switching causes variations in the control flow which limits achievable spool tracking error. This paper presents the design of a robust μ-controller for the spool position reference tracking synthesized with D-K iterative procedure. Furthermore, in order to reduce wind-up effects in the closed-loop, the μ-controller is decomposed to a canonical observer and state feedback components which allows explicit introduction of the saturated control signal in the controller equations. The uncertainty model required for the μ-synthesis is inferred from the nonlinear hydraulic model by identification of a Box–Jenkins model set characterized by its parameter covariance matrix. The regulator is implemented in a 32-bit programmable logic controller (PLC) and its performance is experimentally verified on a laboratory test bench of electro-hydraulic power steering system.
TI - Robust μ-Controller for Hydraulic Spool Valve, Pilot Operated with Switching Micro Valves
JF - Energies
DO - 10.3390/en14164817
DA - 2021-08-07
UR - https://www.deepdyve.com/lp/multidisciplinary-digital-publishing-institute/robust-controller-for-hydraulic-spool-valve-pilot-operated-with-HwG2xH6gVn
SP - 4817
VL - 14
IS - 16
DP - DeepDyve
ER -