Digital robust control of throttled variable displacement hydraulic motors in aircraft power drive units

Olaf Biedermann
The introduction of variable displacement hydraulic motors to secondary and primary flight actuation offers a considerable potential for power optimization and saving in aircraft hydraulic systems. The application in aircraft systems requires high safety, reliability and availability at the smallest expense possible. Therefore the combination of a variable displacement hydraulic motor with a fixed orifice guarantees fail-passive system behavior. The integration in fly-by-wire flight control architecture leads to digital control structures. Robust controller design is...
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