Abstract: Disclosed are an articulated hydraulic machine supporting, control system and control method for same. The articulated hydraulic machine has an end effector for performing useful work. The control system is capable of controlling the end effector for automated movement along a preselected trajectory. The control system has a position error correction system to correct discrepancies between an actual end effector trajectory and a desired end effector trajectory. The correction system can employ one or more absolute position signals provided by one or more acceleration sensors supported by one or more movable machine elements. Good trajectory positioning and repeatability can be obtained. A two-joystick controller system is enabled, which can in some cases facilitate the operator's task and enhance their work quality and productivity.
Type:
Grant
Filed:
January 18, 2006
Date of Patent:
November 22, 2011
Assignee:
The Board of Regents of the University and Community College System on Behalf of the University of Nevada
Abstract: A coordinated joint control system for controlling a coordinated joint motion system, e.g an articulated arm of a hydraulic excavator blends automation of routine tasks with real-time human supervisory trajectory correction and selection. One embodiment employs a differential control architecture utilizing an inverse Jacobian. Modeling of the desired trajectory of the end effector in system space can be avoided. The invention includes image generation and matching systems.
Type:
Grant
Filed:
September 3, 2002
Date of Patent:
November 25, 2008
Assignee:
The Board of Regents of the University and Community College System on Behalf of the University of Nevada, Reno
Abstract: A magneto-rheological fluid device including a housing defining a cavity, a piston slidably disposed in the cavity to divide the cavity into first and second portions, a passage defined on an exterior surface of the piston fluidly coupling the first and second portions of the cavity, a magneto-rheological fluid disposed in the cavity such that motion of the piston is damped by flow of the magneto-rheological fluid through the passage and a magnet disposed to produce a magnetic field within the cavity substantially parallel to the motion of the piston at the exterior surface of the piston.
Type:
Grant
Filed:
November 19, 1999
Date of Patent:
October 29, 2002
Assignee:
Board of Regents of the University and Community College
System on Behalf of the University of Nevada-Reno, The University
of Reno