Adaptive optimal valve control for a resonance fluid actuator

Yannis Koveos, Anthony Tzes

Research output: Contribution to conferencePaperpeer-review


In this article, an optimal control scheme for a piezo - hydraulic actuator exploiting resonance effects is presented. The proposed actuator relies its operation on the significant pressure built up in a fluid pipe during resonance. The actuator's piston houses a valve which rectifies the wave's motion into direct mechanical motion. The discretization of the partial differential equation from the compressible Navier - Stokes equations that captures the fluid - wave propagation leads to a state space description suitable for the development of control algorithms. The valve and piezo dynamics can be embedded in this model for examining the overall performance of the actuator. An optimal controller is designed to maximize the differential pressure across the piston leading to a bang-bang type of control input. The phase and pulse width of the control effort are adjusted based on an adaptive scheme using the gradient of the cost function. Simulation studies are offered for verifying the actuator's principle of operation. In comparison to a passive valve configuration this scheme offers a significant improvement measured by the generated blocking forces.

Original languageEnglish (US)
Number of pages6
StatePublished - 2009
Event35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009 - Porto, Portugal
Duration: Nov 3 2009Nov 5 2009


Other35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009


  • Optimal valve control
  • Piezo - hydraulic actuation
  • Resonance Fluid Actuator

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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