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公开(公告)号：US11215202B2
公开(公告)日：2022-01-04
申请号：US17089137
申请日：2020-11-04
Applicant: ClearMotion, Inc.
Inventor： Joseph Thomas Belter , Graham A. Dowie , Marco Giovanardi , Brian Alexander Selden
Abstract: Disclosed herein are hydraulic actuators and methods for the operation of actuators having variable relative pressure ratios. Further disclosed are methods for designing and/or operating a hydraulic actuator such that the actuator exhibits a variable relative pressure ratio. In certain embodiments, the relative pressure ratio of the hydraulic actuator may be dependent on one or more characteristics (such as, for example, frequency or rate of change) of an oscillating input to the hydraulic actuator.
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公开(公告)号：US11879451B2
公开(公告)日：2024-01-23
申请号：US17198584
申请日：2021-03-11
Applicant: ClearMotion, Inc.
Inventor： Colin Patrick O'Shea , Clive Tucker , Brian Alexander Selden
CPC classification number: F04B49/065 , F04B49/103 , F04B49/20 , F04B2201/0201 , F04B2201/0208 , F04B2201/1202 , F04B2201/1208 , F04B2203/0207 , F04C28/08
Abstract: Presented herein are systems and methods for attenuating flow ripple generated by a hydraulic pump. In certain aspects, a method and system for operating a hydraulic positive displacement pump according to a stabilized command profile are disclosed, such that flow ripple generated by operation of the pump according to the stabilized command profile is attenuated as compared to operation of the pump according to a corresponding nominal command profile. In other aspects, a pressure-balanced active buffer is disclosed that allow for at least partially cancelling flow ripple in a hydraulic circuit comprising a pump. In another aspect, a method for generating ripple maps for a pump is disclosed. Such ripple maps may be used, for example, to determine the stabilized command profile used to operate the pump, or may be used by the pressure-balanced active buffer to counteract ripple in the hydraulic circuit.
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公开(公告)号：US10890197B2
公开(公告)日：2021-01-12
申请号：US16484967
申请日：2018-02-12
Applicant: ClearMotion, Inc.
Inventor： Joseph Thomas Belter , Graham A. Dowie , Marco Giovanardi , Brian Alexander Selden
Abstract: Disclosed herein are hydraulic actuators and methods for the operation of actuators having variable relative pressure ratios. Further disclosed are methods for designing and/or operating a hydraulic actuator such that the actuator exhibits a variable relative pressure ratio. In certain embodiments, the relative pressure ratio of the hydraulic actuator may be dependent on one or more characteristics (such as, for example, frequency or rate of change) of an oscillating input to the hydraulic actuator.
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公开(公告)号：US20180154728A1
公开(公告)日：2018-06-07
申请号：US15544769
申请日：2016-01-22
Applicant: ClearMotion, Inc.
Inventor： Marco Giovanardi , Brian Alexander Selden , Jaganath Chandrasekar
IPC: B60G17/018 , B60G17/015 , B60G17/016 , B60G17/019
CPC classification number: B60G17/018 , B60G13/14 , B60G17/0152 , B60G17/016 , B60G17/0165 , B60G17/0182 , B60G17/019 , B60G17/04 , B60G2202/413 , B60G2202/416 , B60G2204/112 , B60G2300/60 , B60G2400/102 , B60G2400/202 , B60G2400/252 , B60G2400/5182 , B60G2400/64 , B60G2400/91 , B60G2500/02 , B60G2600/181 , B60G2600/182 , B60G2600/188 , B60G2600/604 , B60G2600/85 , B60G2800/162 , B60G2800/916 , F16F9/18 , F16F9/46 , F16F15/002
Abstract: At least one controller configured to control an actuator of an active suspension system. The at least one controller includes circuitry configured to determine an actuator state, and apply the actuator state and a commanded state to an inverse model of the actuator to produce an actuator command. The circuitry is configured to produce the actuator command by a process that includes performing low pass filtering and phase compensation to correct a phase introduced by the low pass filtering.
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