Invention Grant
- Patent Title: Actuator limit controller
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Application No.: US15373626Application Date: 2016-12-09
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Publication No.: US10550860B2Publication Date: 2020-02-04
- Inventor: Alexander Douglas Perkins , Kevin Blankespoor , Alfred Anthony Rizzi
- Applicant: Boston Dynamics, Inc.
- Applicant Address: US MA Waltham
- Assignee: Boston Dynamics, Inc.
- Current Assignee: Boston Dynamics, Inc.
- Current Assignee Address: US MA Waltham
- Agency: Honigman LLP
- Main IPC: F15B11/048
- IPC: F15B11/048 ; F15B13/02 ; F15B9/09 ; F15B21/08 ; F15B15/28 ; G05B19/042

Abstract:
In some applications, a piston of a hydraulic actuator may move at high speeds, and large undesired forces may be generated if the piston reaches an end-stop of the hydraulic actuator at a high speed. The undesired forces may, for example, cause mechanical damage in the hydraulic actuator. A controller may receive information indicative of the piston reaching a first position at a first threshold distance from the end-stop, and, in response, may modify a signal to a valve assembly controlling flow of hydraulic fluid to and from the hydraulic actuator. Further, the controller may receive information indicative of the piston reaching a second position at a second threshold distance closer to the end-stop of the hydraulic actuator, and, in response, the controller may further modify the signal to the valve assembly so as to apply a force on the piston in a away from the end-stop.
Public/Granted literature
- US20170089365A1 Actuator Limit Controller Public/Granted day:2017-03-30
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