公开(公告)号：US06718759B1

公开(公告)日：2004-04-13

申请号：US10254128

申请日：2002-09-25

Applicant: Keith A. Tabor

Inventor： Keith A. Tabor

IPC: F16B1110

CPC classification number: F15B11/02 ,  E02F9/2221 ,  F15B11/006 ,  F15B21/087 ,  F15B2211/30575 ,  F15B2211/327 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/63 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6654 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/71 ,  F15B2211/75 ,  F15B2211/78 ,  F15B2211/88

Abstract: A hydraulic circuit branch includes a hydraulic actuator, such as a cylinder, and an assembly of one or more electrohydraulic proportional valves connected in series between a pressurized fluid supply line and a tank return line. The force acting on the hydraulic actuator is determined by sensing fluid pressures produced by the hydraulic actuator. Pressures in the supply and tank return lines also are sensed. The sensed pressures and a desired velocity for the hydraulic actuator are employed to determine an equivalent flow coefficient, which characterizes fluid flow through the hydraulic circuit branch, either a conduction or restriction coefficient may be derived. The equivalent flow coefficient is used to determine how to activate each electrohydraulic proportional valve to achieve the desired velocity of the hydraulic actuator. The equivalent flow coefficient also is employed to control the pressure levels in the supply and tank return lines.

Abstract translation: 液压回路支路包括诸如气缸的液压致动器，以及串联连接在加压流体供应管线和罐返回管线之间的一个或多个电液比例阀的组件。 通过感测由液压致动器产生的流体压力来确定作用在液压致动器上的力。 供应和回油管路中的压力也被感测到。 用于液压致动器的感测压力和期望速度用于确定表征通过液压回路分支的流体流动的等效流量系数，可以导出传导或限制系数。 使用等效流量系数来确定如何激活每个电液比例阀以实现液压致动器的期望速度。 采用等效流量系数来控制供应和回油管路中的压力水平。

公开(公告)号：US07905088B2

公开(公告)日：2011-03-15

申请号：US11939861

申请日：2007-11-14

Applicant: Dwight B. Stephenson ,  Eric P. Hamkins ,  Joseph L. Pfaff ,  Keith A. Tabor

Inventor： Dwight B. Stephenson ,  Eric P. Hamkins ,  Joseph L. Pfaff ,  Keith A. Tabor

IPC: F16D31/02

CPC classification number: F15B11/006 ,  E02F9/2217 ,  E02F9/2228 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/024 ,  F15B21/14 ,  F15B2211/212 ,  F15B2211/30575 ,  F15B2211/625 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/7128 ,  F15B2211/88

Abstract: A hydraulic system has a valve assembly with two workports coupled to chambers of first and second cylinders which are connected mechanically in parallel to a machine component. A separation control valve is connected between first chambers of both cylinders, and a shunt control valve is connected between the workports. A recovery control valve couples an accumulator to the first chamber of the second cylinder. Opening and closing the valves in different combinations routes fluid from one or both cylinders into the accumulator where the fluid is stored under pressure, and thereafter enables stored fluid to be used to power one or both cylinders. The shunt control valve is used to route fluid exhausting from one chamber of each cylinder to the other chambers of those cylinders. Thus the hydraulic system recovers and reuses energy in various manners.

Abstract translation: 液压系统具有阀组件，其具有联接到第一和第二气缸的室的两个工作端口，其与机器部件机械并联连接。 分离控制阀连接在两个气缸的第一腔室之间，分流控制阀连接在工作口之间。 恢复控制阀将蓄能器连接到第二气缸的第一室。 以不同组合打开和关闭阀门将流体从一个或两个气缸引导到储存器中，其中流体在压力下储存，然后使得存储的流体能够用于为一个或两个气缸供电。 分流控制阀用于将每个气缸的一个室的流体排出物引导到这些气缸的其他室。 因此，液压系统以各种方式恢复和再利用能量。

公开(公告)号：US07856282B2

公开(公告)日：2010-12-21

申请号：US10810377

申请日：2004-03-26

Applicant: Keith A. Tabor

Inventor： Keith A. Tabor

IPC: G05B11/01 ,  G05B11/32 ,  G05B19/18 ,  G06F19/00 ,  G06G7/76

CPC classification number: B25J9/1628 ,  B66F9/0655 ,  B66F9/22 ,  E02F3/433 ,  E02F9/2029 ,  G05B2219/33263 ,  G05B2219/33264 ,  G05B2219/39002 ,  G05B2219/39221 ,  G05B2219/41255 ,  G05B2219/41273 ,  G05B2219/45017 ,  G05B2219/45049

Abstract: A member of a machine, such as a boom on construction equipment for example, is pivoted by a first actuator and has a length that is alterable by a second actuator. A control method allows an operator of the machine to command a point on the member to move along a straight line path. The operator command specifies velocities along two orthogonal axes and those velocities are transformed into an angular velocity and a length velocity for the member. The angular velocity and a length velocity then are converted into individual velocities for the first and second actuators. Each actuator is operated at its respective velocity to achieve the commanded movement of the member.

Abstract translation: 例如，诸如施工设备上的起重机的机器的构件由第一致动器枢转，并且具有可由第二致动器改变的长度。 控制方法允许机器的操作者命令构件上的点沿着直线路径移动。 操作员命令指定沿着两个正交轴的速度，这些速度被转换成成员的角速度和长度速度。 然后将角速度和长度速度转换为第一和第二致动器的单独速度。 每个致动器以其相应的速度操作以实现构件的指令运动。

公开(公告)号：US20080034853A1

公开(公告)日：2008-02-14

申请号：US11831341

申请日：2007-07-31

Applicant: Keith A. Tabor ,  Brian R. Bertolasi

Inventor： Keith A. Tabor ,  Brian R. Bertolasi

IPC: G01P3/44

CPC classification number: B66F9/0655 ,  B66F9/22 ,  B66F17/003

Abstract: Motion of a hydraulically driven machine component is controlled in response to a velocity command that indicates a desired velocity for the machine component. A method for detecting a velocity fault involves determining an actual velocity at which the machine component is moving, and producing a velocity error value based on a difference between the velocity command and the actual velocity. The velocity error value is integrated, such as by a low pass, biquadratic filter function, to produce an integrated value. The integrated value is compared to one or more thresholds to determine whether a velocity fault has occurred.

Abstract translation: 响应于指示机器部件的期望速度的速度指令来控制液压驱动的机器部件的运动。 用于检测速度故障的方法包括确定机器部件正在移动的实际速度，并且基于速度命令和实际速度之间的差产生速度误差值。 速度误差值被积分，例如通过低通，双二次滤波器功能，以产生积分值。 将积分值与一个或多个阈值进行比较，以确定是否发生了速度故障。

公开(公告)号：US06732512B2

公开(公告)日：2004-05-11

申请号：US10254427

申请日：2002-09-25

Applicant: Joseph L. Pfaff ,  Keith A. Tabor

Inventor： Joseph L. Pfaff ,  Keith A. Tabor

IPC: F16B1308

CPC classification number: F15B11/02 ,  E02F9/2025 ,  E02F9/2203 ,  F15B11/006 ,  F15B11/04 ,  F15B11/042 ,  F15B11/044 ,  F15B21/087 ,  F15B2211/30575 ,  F15B2211/327 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/63 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/6653 ,  F15B2211/6654 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/71 ,  F15B2211/75 ,  F15B2211/78 ,  F15B2211/88

Abstract: A control system for operating a hydraulic system includes a user input device which generates an input signal indicating desired movement of a hydraulic actuator. A mapping routine converts the input signal into a velocity command indicating desired actuator velocity. A valve opening routine transforms the velocity command into a flow coefficient which characterizes fluid flow through the valve assembly and from the flow coefficient produces a set of control signals designating levels of electric current to apply to valves within the valve assembly. A pressure controller regulates pressure in the supply line in response to the velocity command. When the hydraulic system has a plurality of functions, the control system adjusts each velocity command to equitably apportion fluid to each function when the aggregate flow being demanded by the functions exceeds the total flow available from a source.

Abstract translation: 用于操作液压系统的控制系统包括用户输入装置，其生成指示液压致动器的期望运动的输入信号。 映射程序将输入信号转换成指示所需致动器速度的速度指令。 阀开启程序将速度指令转换成表征通过阀组件的流体流动的流量系数，并且根据流量系数产生一组控制信号，该控制信号指示施加到阀组件内的阀的电流水平。 压力控制器响应于速度指令来调节供应管线中的压力。 当液压系统具有多个功能时，当功能要求的总流量超过从源获得的总流量时，控制系统调整每个速度命令以公平地分配流体到每个功能。

公开(公告)号：US07451685B2

公开(公告)日：2008-11-18

申请号：US11079059

申请日：2005-03-14

Applicant: Keith A. Tabor

Inventor： Keith A. Tabor

IPC: F15B13/16

CPC classification number: F15B21/14 ,  F15B11/006 ,  F15B11/163 ,  F15B21/082 ,  F15B2211/30575 ,  F15B2211/327 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/63 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6654 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/71 ,  F15B2211/75 ,  F15B2211/78 ,  F15B2211/88

Abstract: A system operates a hydraulic actuator, such as a cylinder, in one of several modes that include powered extension and retraction, self-powering regeneration modes in which fluid exhausting from one cylinder chamber is routed into the other cylinder chamber, and cross function regeneration modes wherein the fluid exhausted from one actuator is routed in the supply conduit to power a different actuator. A controller determines which modes are viable based on existing system conditions and selects from among the viable available modes. That determination is a function of the desired velocity for the actuator, the hydraulic load on the actuator, and pressures in the supply and return hydraulic conduits. The system also can recover potential or kinetic energy through pressure intensification which recovered energy can be used to power another simultaneously active hydraulic function or to drive the prime mover via an over-center variable pump/motor.

Abstract translation: 系统将液压致动器（例如气缸）操作在包括动力伸展和回缩的多种模式中的一种模式中，其中一个气缸室中排出的液体排出到另一气缸室中的自动再生模式以及交叉功能再生模式 其中从一个致动器排出的流体在供应导管中被路由以为不同的致动器供电。 控制器根据现有系统条件确定哪些模式可行，并从可行的可用模式中进行选择。 该确定是致动器的期望速度，致动器上的液压负载以及供应和返回液压管道中的压力的​​函数。 该系统还可以通过压力增强来恢复潜能或动能，回收的能量可用于为另一个同时有效的液压功能供电，或通过一个过中心的可变泵/电机来驱动原动机。

公开(公告)号：US07377480B2

公开(公告)日：2008-05-27

申请号：US11083585

申请日：2005-03-18

Applicant: Keith A. Tabor ,  Joseph L. Pfaff

Inventor： Keith A. Tabor ,  Joseph L. Pfaff

IPC: G05B11/28

CPC classification number: E02F9/22 ,  F15B11/006 ,  F15B19/00 ,  F15B21/087 ,  F15B2211/30575 ,  F15B2211/328 ,  F15B2211/875 ,  F16K37/0083

Abstract: A servomechanism includes a controller which dynamically estimates the resistance of the solenoid coil in an electrohydraulic valve as part of determining a level of electric voltage to apply to open the valve. The servomechanism receives a current setpoint designating a desired electric current level and senses the actual level of current flowing through the coil. A proportional term is derived from the current setpoint and the actual level of current. Creation of a derivative term is based on the difference between the current setpoint and the actual level of current. A feedforward term is produced by estimating the resistance of the electrohydraulic valve and limiting the feedforward term to a predefined range of acceptable values. The proportional term, derivative term, and the feedforward term are summed to define a desired voltage level, and a PWM signal for driving the electrohydraulic valve is generated based on the desired voltage level.

Abstract translation: 伺服机构包括控制器，该控制器动态地估计电动液压阀中的螺线管线圈的阻力，作为确定用于打开阀门的电压水平的一部分。 伺服机构接收指定所需电流水平的电流设定点，并感测流过线圈的电流的实际电平。 从当前设定值和电流的实际电平得出比例项。 衍生项的创建是基于当前设定值与实际电流水平之差。 通过估计电动液压阀的阻力并将前馈项限制在预定范围的可接受值来产生前馈项。 将比例项，微分项和前馈项相加以确定期望的电压电平，并且基于期望的电压电平产生用于驱动电动液压阀的PWM信号。

公开(公告)号：US20080110165A1

公开(公告)日：2008-05-15

申请号：US11939847

申请日：2007-11-14

Applicant: Eric P. Hamkins ,  Dwight B. Stephenson ,  Joseph L. Pfaff ,  Keith A. Tabor

Inventor： Eric P. Hamkins ,  Dwight B. Stephenson ,  Joseph L. Pfaff ,  Keith A. Tabor

IPC: F15B11/024

CPC classification number: F15B11/006 ,  E02F9/2217 ,  E02F9/2228 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/024 ,  F15B21/14 ,  F15B2211/212 ,  F15B2211/30575 ,  F15B2211/625 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/7053 ,  F15B2211/7058 ,  F15B2211/7128 ,  F15B2211/88

Abstract: A method provides several modes for recovering hydraulic energy produced by an overrunning load acting on cylinders connected in parallel to a machine component. In one mode, fluid from first chambers in both cylinders is routed into the accumulator, while other fluid is directed into second chambers of those cylinders. In a different mode, fluid is routed from the first chamber of only one cylinder into the accumulator, and fluid from the first chamber of the other cylinder goes into the second chambers of both cylinders. Yet another mode comprises routing fluid from the first chambers of both cylinders into the second chambers of both cylinders. In still another mode, fluid from the first chambers of both cylinders goes into the return conduit while the second chambers of both cylinders receive fluid from a supply conduit. Several modes of reusing the recovered energy are described.

Abstract translation: 一种方法提供了几种模式，用于回收由作用在与机器部件并联连接的气缸上的超越负载产生的液压能量。 在一种模式中，来自两个气缸中的第一腔室的流体被引导到蓄能器中，而其它流体被引导到这些气缸的第二腔室中。 在不同的模式中，流体从仅一个气缸的第一室传送到蓄能器中，并且来自另一个气缸的第一室的流体进入两个气缸的第二室。 另一种模式包括将流体从两个气缸的第一室引导到两个气缸的第二腔室中。 在另一种模式中，来自两个气缸的第一腔室的流体进入返回导管，而两个气缸的第二腔室从供应导管接收流体。 描述了重新利用回收能量的几种模式。

公开(公告)号：US06880332B2

公开(公告)日：2005-04-19

申请号：US10254397

申请日：2002-09-25

Applicant: Joseph L. Pfaff ,  Keith A. Tabor

Inventor： Joseph L. Pfaff ,  Keith A. Tabor

IPC: G05D7/06 ,  F15B11/00 ,  F15B21/08 ,  F15B13/04 ,  F16D31/02

CPC classification number: F15B21/087 ,  F15B11/006 ,  F15B21/082 ,  F15B2211/30575 ,  F15B2211/327 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/6653 ,  F15B2211/7053 ,  F15B2211/75 ,  F15B2211/88

Abstract: The flow of fluid to a hydraulic actuator is controlled by a valve assembly which operates in different metering modes at various points in time. The metering mode to use in selected in response to the hydraulic load that acts on the valve associated with the hydraulic actuator. Specifically the load is determined and then compared to threshold levels associated with the different metering modes to choose the metering mode for use a given point in time.

Abstract translation: 流体到液压致动器的流动由在不同时间点以不同计量模式操作的阀组件来控制。 响应于作用在与液压致动器相关联的阀的液压负载而选择的测量模式。 具体地，确定负载，然后与与不同测光模式相关联的阈值水平进行比较，以选择使用给定时间点的测光模式。

公开(公告)号：US6018687A

公开(公告)日：2000-01-25

申请号：US797316

申请日：1997-02-07

Applicant: Keith A. Tabor

Inventor： Keith A. Tabor

IPC: B26D5/34 ,  B65H23/04 ,  B65H39/16 ,  B65H45/28 ,  G06F19/00

CPC classification number: B26D5/007 ,  B26D5/34 ,  B65H23/046 ,  B65H23/048 ,  B65H39/16 ,  B65H45/28 ,  B65H2301/4148 ,  B65H2511/512 ,  Y10T83/141 ,  Y10T83/145

Abstract: A cutoff control system for controlling the positional relationship of a series of printed images on a continuous web of material relative to a cutoff device. The system includes a scanner for producing an output signal indicative of a suitable portion of the printed image on said web and a mechanism for laterally positioning the scanner with respect to said printed image on said web. The system also includes a control mechanism for controlling the operation of the positioning mechanism in response to digital prepress data, including a system for determining a suitable portion of the printed image to be scanned by the scanner.

Abstract translation: 一种切断控制系统，用于控制相对于切断装置的连续材料幅材上的一系列打印图像的位置关系。 该系统包括用于产生指示所述纸幅上的打印图像的合适部分的输出信号的扫描器和用于相对于所述纸幅上的所述打印图像横向定位扫描仪的机构。 该系统还包括用于响应于数字印前数据来控制定位机构的操作的控制机构，包括用于确定由扫描器扫描的打印图像的合适部分的系统。