Hydraulic system with compensation for kinematic position changes of machine members
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United States of America Patent
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Jan 25, 2011
Grant Date -
Nov 5, 2009
app pub date -
May 1, 2008
filing date -
May 1, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A machine, such as a backhoe, has a series of components connected in series and moved by separate hydraulic actuators. A position estimator determines the present position of each component from the load acting on the associated hydraulic actuator and a velocity command for the component. For each component, a function parameter estimator uses the present positions of the components to derive a set of parameters that include a static structure load that the components exert on the associated hydraulic actuator, acceleration and deceleration limits for both directions of component motion, and a control bandwidth for the associated hydraulic actuator. The set of parameters for a given component is used to control the associated hydraulic actuator.
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