Invention Grant
- Patent Title: Actuator limit controller
- Patent Title (中): 执行器限位控制器
-
Application No.: US14489778Application Date: 2014-09-18
-
Publication No.: US09546672B2Publication Date: 2017-01-17
- Inventor: Alex Perkins , Kevin Blankespoor , Alfred Rizzi
- Applicant: Google Inc.
- Applicant Address: US CA Mountain View
- Assignee: Google Inc.
- Current Assignee: Google Inc.
- Current Assignee Address: US CA Mountain View
- Agency: McDonnell Boehnen Hulbert & Berghoff LLP
- Main IPC: F15B9/09
- IPC: F15B9/09 ; F15B13/02 ; F15B21/08 ; F15B15/28 ; F15B11/048

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
- US20160025114A1 Actuator Limit Controller Public/Granted day:2016-01-28
Information query