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公开(公告)号：US20100312365A1
公开(公告)日：2010-12-09
申请号：US12795273
申请日：2010-06-07
申请人： JASON LEVIN , PETROS IOANNOU
发明人： JASON LEVIN , PETROS IOANNOU
CPC分类号： G05B19/41835 , G05B2219/41217 , G05B2219/41232 , H03H21/0021
摘要： The control of flexible systems is often difficult due to the exact frequencies of the elastic modes being hard to identify. These flexible modes may change over time, or vary between units of the same system. The variation in the modal dynamics may cause a degradation in performance or even instabilities unless compensated for by the control scheme. Controllers designed for these types of systems use notch filters for mode suppression. However variation in the parameters of the flexible modes may cause the need for wide notch filters. An adaptive scheme is proposed which uses an online estimator based on plant parameterization. The scheme may not use probe signals and may not rely on exact parameter identification of the unknown parameters. Instead it may continuously update itself to cancel the effect of the flexible modes by been able to identify the effect of the modal dynamics on the performance of the system. The adaptive notch filter can be designed narrower, adding less phase lag at lower frequencies, thereby allowing an increase in bandwidth and disturbance rejection capability. Simulation and experimental verification of the adaptive mode suppression scheme is given through the use of a laser beam pointing system. The adaptive scheme is compared to a non-adaptive scheme, and is able to decrease the standard deviation of the experimentally measured tracking error by 14% even when the flexible dynamics are unknown.
摘要翻译： 灵活系统的控制通常是困难的，因为弹性模式的确切频率难以识别。 这些灵活的模式可能随着时间的推移而变化，或者在相同系统的单元之间变化 模态动力学的变化可能导致性能下降甚至不稳定，除非由控制方案补偿。 为这些类型的系统设计的控制器使用陷波滤波器进行模式抑制。 然而，灵活模式的参数的变化可能导致需要宽的陷波滤波器。 提出了一种使用基于工厂参数化的在线估计器的自适应方案。 该方案可能不使用探测信号，也可能不依赖于未知参数的精确参数识别。 相反，它可以通过能够识别模态动力学对系统性能的影响而不断更新自己以消除灵活模式的影响。 自适应陷波滤波器可以设计得更窄，在较低频率下增加较少的相位滞后，从而允许增加带宽和抗干扰能力。 通过使用激光束指向系统给出了自适应模式抑制方案的仿真和实验验证。 将自适应方案与非自适应方案进行比较，即使灵活动态未知，也能将实验测量的跟踪误差的标准偏差降低14％。
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公开(公告)号：US20050072840A1
公开(公告)日：2005-04-07
申请号：US10868200
申请日：2004-06-14
申请人： Jason Levin , Larry Garcia
发明人： Jason Levin , Larry Garcia
CPC分类号： B65D85/505 , B65D5/4212 , B65D5/5286
摘要： A unified transport and display mechanism is particularly suited for transporting and displaying buckets and items within buckets. The items include, but are not limited to, flowers or other plant specimens. The mechanism includes a container and a lid for covering the container. The lid includes one or more perforated areas, the removal of which forms one or more corresponding apertures. Each aperture is sized and adapted for receiving an item such as a bucket in a display mode. When received, the bucket extends into the aperture at a level below a top surface of the lid, and partially extends above the lid top surface to allow visual access to the items.
摘要翻译： 统一的运输和显示机构特别适用于在桶内运输和显示桶和物品。 这些物品包括但不限于花或其他植物标本。 该机构包括用于覆盖容器的容器和盖子。 盖子包括一个或多个穿孔区域，其移除形成一个或多个对应的孔。 每个孔径的大小适于在显示模式下接收诸如铲斗的物品。 当容器接收时，铲斗在盖的顶部表面下方延伸到孔中，并且部分地延伸到盖顶表面上方，以允许对物品的视觉访问。
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公开(公告)号：US08392000B2
公开(公告)日：2013-03-05
申请号：US12795273
申请日：2010-06-07
申请人： Jason Levin , Petros Ioannou
发明人： Jason Levin , Petros Ioannou
IPC分类号： G06F19/00
CPC分类号： G05B19/41835 , G05B2219/41217 , G05B2219/41232 , H03H21/0021
摘要： The control of flexible systems is often difficult due to the exact frequencies of the elastic modes being hard to identify. These flexible modes may change over time, or vary between units of the same system. The variation in the modal dynamics may cause a degradation in performance or even instabilities unless compensated for by the control scheme. Controllers designed for these types of systems use notch filters for mode suppression. However variation in the parameters of the flexible modes may cause the need for wide notch filters. An adaptive scheme is proposed which uses an online estimator based on plant parameterization. The scheme may not use probe signals and may not rely on exact parameter identification of the unknown parameters. Instead it may continuously update itself to cancel the effect of the flexible modes by been able to identify the effect of the modal dynamics on the performance of the system. The adaptive notch filter can be designed narrower, adding less phase lag at lower frequencies, thereby allowing an increase in bandwidth and disturbance rejection capability. Simulation and experimental verification of the adaptive mode suppression scheme is given through the use of a laser beam pointing system. The adaptive scheme is compared to a non-adaptive scheme, and is able to decrease the standard deviation of the experimentally measured tracking error by 14% even when the flexible dynamics are unknown.
摘要翻译： 灵活系统的控制通常是困难的，因为弹性模式的确切频率难以识别。 这些灵活的模式可能随着时间的推移而变化，或者在相同系统的单元之间变化。 模态动力学的变化可能导致性能下降甚至不稳定，除非由控制方案补偿。 为这些类型的系统设计的控制器使用陷波滤波器进行模式抑制。 然而，灵活模式的参数的变化可能导致需要宽的陷波滤波器。 提出了一种使用基于工厂参数化的在线估计器的自适应方案。 该方案可能不使用探测信号，也可能不依赖于未知参数的精确参数识别。 相反，它可以通过能够识别模态动力学对系统性能的影响而不断更新自己以消除灵活模式的影响。 自适应陷波滤波器可以设计得更窄，在较低频率下增加较少的相位滞后，从而允许增加带宽和抗干扰能力。 通过使用激光束指向系统给出了自适应模式抑制方案的仿真和实验验证。 将自适应方案与非自适应方案进行比较，即使灵活动态未知，也能将实验测量的跟踪误差的标准偏差降低14％。
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公开(公告)号：US20060064314A1
公开(公告)日：2006-03-23
申请号：US11225382
申请日：2005-09-12
申请人： Jason Levin , David Levin
发明人： Jason Levin , David Levin
IPC分类号： G06Q99/00
CPC分类号： G06Q30/02 , G06Q30/0601
摘要： A graphical user interface for a floral merchandising system. The graphical user interface includes a selection bar having one or more floral product tabs, each floral product tab representing one of a number of floral products. The graphical user interface further includes one or more user-selectable item buttons, each item button corresponding to one of the number of floral products, and one or more windows for displaying information about one of the number of floral products according to a user selection.
摘要翻译： 花卉销售系统的图形用户界面。 图形用户界面包括具有一个或多个花卉产品标签的选择栏，每个花卉产品标签代表多个花卉产品之一。 图形用户界面还包括一个或多个用户可选择的项目按钮，每个项目按钮对应于多个花卉产品之一，以及一个或多个窗口，用于根据用户选择来显示有关其中一个花卉产品的信息。
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