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公开(公告)号：US12053783B2
公开(公告)日：2024-08-06
申请号：US17685902
申请日：2022-03-03
发明人： Steven T. Ryan , John E. Booth
CPC分类号： B01L9/02 , F16F15/02 , B01L2200/12 , B01L2300/0887 , G01M7/02
摘要： A low-profile, vibration-damped tabletop for supporting sensitive scientific equipment is described. The tabletop may include a laminated structure having a lower metal plate that is sized to achieve a desired weight for the tabletop, a manufactured, homogenous filler and a “clean top” metal upper skin having a plurality of holes backed by liquid impermeable barriers. The damping characteristics are improved at low frequencies compared to a comparable structure with a honeycomb filler.
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公开(公告)号：US20240133443A1
公开(公告)日：2024-04-25
申请号：US18537491
申请日：2023-12-12
IPC分类号： F16F7/10 , F16F7/104 , F16F15/00 , F16F15/02 , G05B19/042
CPC分类号： F16F7/1005 , F16F7/104 , F16F15/002 , F16F15/022 , G05B19/042 , F16F2222/08 , F16F2224/0208 , F16F2228/066 , F16F2230/18 , G05B2219/21137 , G05B2219/25252 , G05B2219/25257
摘要： Apparatus and methods to reduce unwanted motion in precision instruments are described. An active vibration-isolation system may include a feedback loop that senses motion of an intermediate mass. In noisy environments, where the feedback loop would otherwise fail or provide inadequate isolation, feedforward control can be implemented to sense floor vibrations and reduce motion of the intermediate mass that would otherwise be induced by the floor vibrations. The feedforward control can reduce motion of the intermediate mass to a level that allows the feedback loop to operate satisfactorily.
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公开(公告)号：US10184539B2
公开(公告)日：2019-01-22
申请号：US14871779
申请日：2015-09-30
发明人： Emil Kraner , Antonio Lopes , Justin Nealey
摘要： Apparatus and methods to reduce unwanted motion in a payload of a precision instrument are described. The payload may be supported by an intermediate mass. A feedback signal based upon sensed motion of the intermediate mass may be applied to an intermediate-mass actuator arranged to drive the intermediate mass. Additionally, a feedforward signal may be applied to a payload actuator arranged to drive the payload and used to suppress unwanted motion of the payload. The feedforward signal may be derived from a source within the apparatus or external to the apparatus that would otherwise cause unwanted motion of the payload.
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公开(公告)号：US20150084249A1
公开(公告)日：2015-03-26
申请号：US14551490
申请日：2014-11-24
发明人： Emil Kraner , Antonio Lopes
CPC分类号： F16F15/002 , F16F15/022 , G05B19/404 , G05B2219/41191 , G05B2219/49048 , G05B2219/49054
摘要： An active damping system for use in connection with a vibration isolation system includes an intermediate mass between a base and an isolated payload. The intermediate mass is supported by at least one support element which also supports at least substantially all of the static forces of the isolated payload. An actuator dampens and isolates dynamic forces acting on the intermediate mass from the isolated payload. The active damping system also includes a payload support element and a passive damping element, both of which are coupled at one end to the payload platform and at an opposite end to the intermediate mass. A sensor is affixed to the intermediate mass to generate a feedback signal to a processor coupled to the actuator.
摘要翻译： 与振动隔离系统结合使用的主动阻尼系统包括在基座和隔离有效载荷之间的中间质量。 中间质量块由至少一个支撑元件支撑，该至少一个支撑元件还支撑至少基本上所有隔离有效载荷的静力。 执行器阻尼并隔离作用在中间质量块上的动力，从而隔离有效载荷。 主动阻尼系统还包括有效负载支撑元件和被动阻尼元件，两者都在一端耦合到有效负载平台并且在与中间质量块相对的端部处。 将传感器固定到中间质量块以产生到耦合到致动器的处理器的反馈信号。
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公开(公告)号：US11898926B2
公开(公告)日：2024-02-13
申请号：US17018136
申请日：2020-09-11
摘要： Apparatus and methods to automatically inspect precision tabletops used for vibration isolation are described. An inspection head having an imaging device and/or perturbing device can be positioned automatically at a plurality of locations over a precision tabletop. The inspection head can further include a distance sensor that can be used to determine a flatness of a portion or all of a surface of the precision tabletop. The inspection head may further include marking apparatus to automatically mark non-compliant features formed on the precision tabletop.
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公开(公告)号：US20190234478A1
公开(公告)日：2019-08-01
申请号：US16233428
申请日：2018-12-27
发明人： Emil KRANER , Antonio Lopes , Justin Nealey
IPC分类号： F16F7/10
CPC分类号： F16F7/1011
摘要： Apparatus and methods to reduce unwanted motion in a payload of a precision instrument are described. The payload may be supported by an intermediate mass. A feedback signal based upon sensed motion of the intermediate mass may be applied to an intermediate-mass actuator arranged to drive the intermediate mass. Additionally, a feedforward signal may be applied to a payload actuator arranged to drive the payload and used to suppress unwanted motion of the payload. The feedforward signal may be derived from a source within the apparatus or external to the apparatus that would otherwise cause unwanted motion of the payload.
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公开(公告)号：US20230092923A1
公开(公告)日：2023-03-23
申请号：US18057571
申请日：2022-11-21
IPC分类号： F16F7/10 , F16F7/104 , F16F15/00 , F16F15/02 , G05B19/042
摘要： Apparatus and methods to reduce unwanted motion in precision instruments are described. An active vibration-isolation system may include a feedback loop that senses motion of an intermediate mass. In noisy environments, where the feedback loop would otherwise fail or provide inadequate isolation, feedforward control can be implemented to sense floor vibrations and reduce motion of the intermediate mass that would otherwise be induced by the floor vibrations. The feedforward control can reduce motion of the intermediate mass to a level that allows the feedback loop to operate satisfactorily.
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公开(公告)号：US20220288595A1
公开(公告)日：2022-09-15
申请号：US17685902
申请日：2022-03-03
发明人： Steven T. Ryan , John E. Booth
摘要： A low-profile, vibration-damped tabletop for supporting sensitive scientific equipment is described. The tabletop may include a laminated structure having a lower metal plate that is sized to achieve a desired weight for the tabletop, a manufactured, homogenous filler and a “clean top” metal upper skin having a plurality of holes backed by liquid impermeable barriers. The damping characteristics are improved at low frequencies compared to a comparable structure with a honeycomb filler.
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公开(公告)号：US20220181062A1
公开(公告)日：2022-06-09
申请号：US17601656
申请日：2020-04-07
发明人： Igor KORDUNSKY
摘要： Apparatus and methods to reduce unwanted magnetic fields and unwanted motion in precision instruments are described. A coil assembly that is used to generate an opposing magnetic field can include a first coil configured to generate a static magnetic field and a second coil configured to generate a time-varying magnetic field. The first and second coils can be in close proximity and sized to suppress magnetic fields over a large localized region. The first coil can be connected to a choke to increase its impedance seen by the second coil.
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公开(公告)号：US11305290B2
公开(公告)日：2022-04-19
申请号：US15575172
申请日：2016-05-18
发明人： Steven T. Ryan , John E. Booth
摘要： A low-profile, vibration-damped tabletop for supporting sensitive scientific equipment is described. The tabletop may include a laminated structure having a lower metal plate that is sized to achieve a desired weight for the tabletop, a manufactured, homogenous filler and a “clean top” metal upper skin having a plurality of holes backed by liquid impermeable barriers. The damping characteristics are improved at low frequencies compared to a comparable structure with a honeycomb filler.
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