公开(公告)号：US20070260335A1

公开(公告)日：2007-11-08

申请号：US11416876

申请日：2006-05-03

申请人： Junqiang Fan ,  Johan Backstrom

发明人： Junqiang Fan ,  Johan Backstrom

IPC分类号： G05B13/02

CPC分类号： G05B11/32 ,  G05B13/042

摘要： A method includes receiving measurement data from at least one sensor at a first controller. The measurement data is associated with a process. The method also includes receiving a first output signal at the first controller. The first output signal is generated by a second controller and affects the process. The method further includes determining how to control at least a portion of the process using the measurement data and the first output signal. In addition, the method includes providing a second output signal, where the second output signal is operable to control at least the portion of the process. The second controller may be operable to use the second output signal to generate the first output signal.

摘要翻译： 一种方法包括从第一控制器处的至少一个传感器接收测量数据。 测量数据与过程相关联。 该方法还包括在第一控制器处接收第一输出信号。 第一个输出信号由第二个控制器产生并影响该过程。 该方法还包括确定如何使用测量数据和第一输出信号来控制处理的至少一部分。 此外，该方法包括提供第二输出信号，其中第二输出信号可操作以至少控制该过程的一部分。 第二控制器可操作以使用第二输出信号来产生第一输出信号。

公开(公告)号：US20070255446A1

公开(公告)日：2007-11-01

申请号：US11413524

申请日：2006-04-28

申请人： Johan Backstrom ,  Junqiang Fan ,  Pengling He ,  Gregory Stewart

发明人： Johan Backstrom ,  Junqiang Fan ,  Pengling He ,  Gregory Stewart

IPC分类号： G06F7/66

CPC分类号： D21G9/0009 ,  G05B13/048

摘要： A method includes predicting measurements or states to be used by a controller to control a process. The predicted measurements or states are generated using a model of the process. The method also includes providing the predicted measurements or states to the controller such that the controller uses the predicted measurements or states at a sampling rate of the controller. In addition, the method includes updating at least some of the predicted measurements or states using measurements associated with a characteristic of an item from a sensor. The model may represent a discrete time model, and the method may also include generating the discrete time model using a continuous time model of the process. The measurements could be received from a plurality of sensors, where at least two of the sensors have different sampling times.

摘要翻译： 一种方法包括预测由控制器使用以控制过程的测量或状态。 使用该过程的模型生成预测的测量或状态。 该方法还包括向控制器提供预测的测量或状态，使得控制器以控制器的采样率使用预测的测量或状态。 此外，该方法包括使用与来自传感器的物品的特征相关联的测量来更新预测的测量或状态中的至少一些。 该模型可以表示离散时间模型，并且该方法还可以包括使用该过程的连续时间模型来生成离散时间模型。 可以从多个传感器接收测量值，其中至少两个传感器具有不同的采样时间。

公开(公告)号：US08224476B2

公开(公告)日：2012-07-17

申请号：US12790951

申请日：2010-05-31

申请人： Danlei Chu ,  Cristian Gheorghe ,  Johan Backstrom

发明人： Danlei Chu ,  Cristian Gheorghe ,  Johan Backstrom

IPC分类号： G06F7/66 ,  D21F11/00 ,  D21F13/00 ,  D21F7/00

CPC分类号： D21G9/0027 ,  D21G9/0054

摘要： Alignment is a critical component for modeling a cross-directional (CD) papermaking process. It specifies the spatial relationship between individual CD actuators to paper quality measurements. Misalignment can occur unexpectedly due to sheet wander or CD shrinkage variation. In certain applications and circumstances, a misalignment of one third (⅓) actuator zone width can result in significant paper quality degradation. Detecting a misalignment and identifying CD alignment in closed loop are highly demanded in paper mills but these are nontrivial problems. A technique for maintaining proper CD alignment in sheetmaking systems entails monitoring the alignment online, triggering closed loop identification if misalignment is detected, and then deploying the new alignment. No personnel intervention is required.

摘要翻译： 校准是模拟横向（CD）造纸过程的关键组件。 它规定了单个CD执行器与纸张质量测量的空间关系。 由于纸张漂移或CD收缩变化，可能会意外地发生偏移。 在某些应用和环境中，三分之一（1/3）致动器区域宽度的偏移可能会导致纸张质量下降。 在造纸厂中非常需要检测未对齐并在闭环中识别CD对准，但这些都是非常重要的问题。 在片材制造系统中保持适当的CD对准的技术需要在线监视对齐，如果检测到未对准，则触发闭环识别，然后部署新的对准。 不需要人员干预。

公开(公告)号：US20110290438A1

公开(公告)日：2011-12-01

申请号：US12790951

申请日：2010-05-31

申请人： Danlei Chu ,  Cristian Gheorghe ,  Johan Backstrom

发明人： Danlei Chu ,  Cristian Gheorghe ,  Johan Backstrom

IPC分类号： D21F11/00

CPC分类号： D21G9/0027 ,  D21G9/0054

摘要： Alignment is a critical component for modeling a cross-directional (CD) papermaking process. It specifies the spatial relationship between individual CD actuators to paper quality measurements. Misalignment can occur unexpectedly due to sheet wander or CD shrinkage variation. In certain applications and circumstances, a misalignment of one third (⅓) actuator zone width can result in significant paper quality degradation. Detecting a misalignment and identifying CD alignment in closed loop are highly demanded in paper mills but these are nontrivial problems. A technique for maintaining proper CD alignment in sheetmaking systems entails monitoring the alignment online, triggering closed loop identification if misalignment is detected, and then deploying the new alignment. No personnel intervention is required.

摘要翻译： 校准是模拟横向（CD）造纸过程的关键组件。 它规定了单个CD执行器与纸张质量测量的空间关系。 由于纸张漂移或CD收缩变化，可能会意外地发生偏移。 在某些应用和环境中，三分之一（1/3）致动器区域宽度的偏移可能会导致纸张质量下降。 在造纸厂中非常需要检测未对齐并在闭环中识别CD对准，但这些都是非常重要的问题。 在片材制造系统中保持适当的CD对准的技术需要在线监视对齐，如果检测到未对准，则触发闭环识别，然后部署新的对准。 不需要人员干预。

公开(公告)号：US09309625B2

公开(公告)日：2016-04-12

申请号：US13655193

申请日：2012-10-18

申请人： Johan Backstrom ,  Michael Forbes

发明人： Johan Backstrom ,  Michael Forbes

IPC分类号： D21G9/00

CPC分类号： D21G9/0009 ,  D21G9/0027

摘要： Partitioning control of the wet end and dry end, by introducing estimates of physical properties such as dry weight: and percent ash at the wire, allows for machine direction (MD) controls to continue during loss of scanner measurements. A mathematical model estimates the controlled, variables, such as dry weight, basis weight, and ash percent at the wire, and these estimated values are then controlled. When scanner measurements resume, parameters in the model are recursively updated to compensate for any model errors and ensure an accurate model. MD controls consist of a cascade set-up where the estimated wire-dry weight or wire basis weight and estimated wire ash percent are controlled by manipulating stock flow and addition of filler to stock. When scanner measurements are available, they become the downstream variables in the cascade control and are controlled by manipulation of the setpoints for the estimated wire weight and ash.

摘要翻译： 对湿端和干端进行分区控制，通过引入物理性质如干重的估算值以及线材灰分百分比，可以在扫描仪测量失败期间继续进行机器方向（MD）控制。 数学模型估计受控的变量，例如干重，基重和电线上的灰分百分数，然后控制这些估计值。 当扫描仪测量恢复时，模型中的参数被递归更新，以补偿任何模型误差并确保准确的模型。 MD控制由级联设置组成，通过操纵库存流量和添加填充料，控制估计的线干重或线材重量和估计的线灰分百分比。 当扫描仪测量可用时，它们将成为级联控制中的下游变量，并通过操作估计的线重和灰分的设定值来控制。

公开(公告)号：US20140110871A1

公开(公告)日：2014-04-24

申请号：US13655193

申请日：2012-10-18

申请人： Johan Backstrom ,  Michael Forbes

发明人： Johan Backstrom ,  Michael Forbes

IPC分类号： D21F13/00 ,  B29C67/24 ,  D21F7/00

CPC分类号： D21G9/0009 ,  D21G9/0027

摘要： Partitioning control of the wet end and dry end, by introducing estimates of physical properties such as dry weight: and percent ash at the wire, allows for machine direction (MD) controls to continue during loss of scanner measurements. A mathematical model estimates the controlled, variables, such as dry weight, basis weight, and ash percent at the wire, and these estimated values are then controlled. When scanner measurements resume, parameters in the model are recursively updated to compensate for any model errors and ensure an accurate model. MD controls consist of a cascade set-up where the estimated wire-dry weight or wire basis weight and estimated wire ash percent are controlled by manipulating stock flow and addition of filler to stock. When scanner measurements are available, they become the downstream variables in the cascade control and are controlled by manipulation of the setpoints for the estimated wire weight and ash.

摘要翻译： 对湿端和干端进行分区控制，通过引入物理性质如干重的估算值以及线材灰分百分比，可以在扫描仪测量失败期间继续进行机器方向（MD）控制。 数学模型估计受控的变量，例如干重，基重和电线上的灰分百分数，然后控制这些估计值。 当扫描仪测量恢复时，模型中的参数被递归更新，以补偿任何模型误差并确保准确的模型。 MD控制由级联设置组成，通过操纵库存流量和添加填充料，控制估计的线干重或线材重量和估计的线灰分百分比。 当扫描仪测量可用时，它们将成为级联控制中的下游变量，并通过操作估计的线重和灰分的设定值来控制。