公开(公告)号：US06195594B1

公开(公告)日：2001-02-27

申请号：US09345172

申请日：1999-06-30

Applicant: Sunil C. Shah ,  Pradeep Pandey ,  Thorkell Gudmundsson ,  Mark Erickson

Inventor： Sunil C. Shah ,  Pradeep Pandey ,  Thorkell Gudmundsson ,  Mark Erickson

IPC: G06F1900

CPC classification number: G05B17/02 ,  G05B15/02 ,  G06F17/50 ,  G06F2217/10 ,  Y02T10/82

Abstract: A method for computer aided design of a product or process. The method includes the steps of representing a computer-aided design activity as a design cycle. The design cycle is then converted into individual iterations of decisions to be made within the design cycle. The individual iterations of decisions are then mapped into a hierarchical structure of influence diagrams. The decision making process of the influence diagrams are performed and data is collected from the decision process that has been performed. The remaining unexecuted decisions and their posterior probabilities are updated based upon the outcomes of the decision process that was most recently performed.

Abstract translation: 一种用于产品或过程的计算机辅助设计的方法。 该方法包括将计算机辅助设计活动表示为设计周期的步骤。 然后将设计周期转换为在设计周期内进行的决定的单独迭代。 然后将决策的单独迭代映射到影响图的分层结构中。 执行影响图的决策过程，并从执行的决策过程收集数据。 剩下的未执行的决定及其后验概率根据最近执行的决策过程的结果进行更新。

公开(公告)号：US5517594A

公开(公告)日：1996-05-14

申请号：US324416

申请日：1994-10-17

Applicant: Sunil C. Shah ,  Pradeep Pandey

Inventor： Sunil C. Shah ,  Pradeep Pandey

IPC: C23C16/52 ,  H01L21/00 ,  H05B1/02 ,  C23C14/54

CPC classification number: H01L21/67248 ,  C23C16/52

Abstract: A system for controlling a thermal reactor is disclosed that characterizes the thermal reactor with a reactor model that indicates behavior of the thermal reactor and of a load contained in the thermal reactor and that accounts for interaction among a set of heating zones of the thermal reactor. An online reactor model is then determined that estimates the thermal behavior of the load based upon an online input power to the thermal reactor and upon an online temperature indication from the thermal reactor. A time varying temperature and reactant flow recipe is determined that minimizes end of run parameters on the load. A multi-variable controller is employed to minimize temperature deviations of the load from a predetermined temperature recipe or time varying trajectory.

Abstract translation: 公开了一种用于控制热反应器的系统，其特征在于用反应器模型表征热反应器，该反应器模型指示热反应器和包含在热反应器中的负载的行为，并且考虑到热反应器的一组加热区之间的相互作用。 然后确定在线反应器模型，其基于来自热反应堆的在线输入功率以及来自热反应器的在线温度指示来估计负载的热性能。 确定时间变化的温度和反应物流动配方，其最小化负载上的运行参数的结束。 使用多变量控制器来使负载与预定温度配方或时变轨迹的温度偏差最小化。

公开(公告)号：US6167360A

公开(公告)日：2000-12-26

申请号：US121949

申请日：1998-07-24

Applicant: Mark A. Erickson ,  Pradeep Pandey ,  Sunil C. Shah ,  Thorkell Gudmundsson

Inventor： Mark A. Erickson ,  Pradeep Pandey ,  Sunil C. Shah ,  Thorkell Gudmundsson

IPC: G05B13/04 ,  G05B17/02 ,  G06G7/48

CPC classification number: G05B13/042 ,  G05B13/04 ,  G05B17/02

Abstract: The present invention is a method and apparatus for dynamic optimization of a dynamic physical system having a device under control and a controller along with a modeling system having an estimator and a constrained nonlinear program. The time varying trajectories of the dynamic physical system are parameterized and run through the modeling system in order to produce a set of optimal time varying setpoint trajectories to be used in the dynamic physical system. The optimal time varying setpoint trajectories optimize the physical system to produce the desired end result (or product) of the dynamic physical system.

Abstract translation: 本发明是用于动态优化动态物理系统的方法和装置，其具有被控制的装置和控制器以及具有估计器和约束非线性程序的建模系统。 动态物理系统的时变轨迹被参数化并运行在建模系统中，以便产生要在动态物理系统中使用的一组最佳时变设定点轨迹。 最优时变设定点轨迹优化物理系统以产生动态物理系统的期望最终结果（或产品）。

公开(公告)号：US5991525A

公开(公告)日：1999-11-23

申请号：US917053

申请日：1997-08-22

Applicant: Sunil C. Shah ,  Pradeep Pandey

Inventor： Sunil C. Shah ,  Pradeep Pandey

IPC: G05B13/04

CPC classification number: G05B13/04

Abstract: A method for the estimation of the state variables of nonlinear systems with exogenous inputs is based on improved extended Kalman filtering (EKF) type techniques. The method uses a discrete-time model, based on a set of nonlinear differential equations describing the system, that is linearized about the current operating point. The time update for the state estimates is performed using integration methods. Integration, which is accomplished through the use of matrix exponential techniques, avoids the inaccuracies of approximate numerical integration techniques. The updated state estimates and corresponding covariance estimates use a common time-varying system model for ensuring stability of both estimates. Other improvements include the use of QR factorization for both time and measurement updating of square-root covariance and Kalman gain matrices and the use of simulated annealing for ensuring that globally optimal estimates are produced.

Abstract translation: 用外推法估计非线性系统的状态变量的方法是基于改进的扩展卡尔曼滤波（EKF）类型技术。 该方法使用离散时间模型，基于描述系统的一组非线性微分方程，其关于当前工作点线性化。 使用集成方法执行状态估计的时间更新。 通过使用矩阵指数技术实现的集成避免了近似数值积分技术的不准确性。 更新的状态估计和相应的协方差估计使用通用的时变系统模型来确保两个估计的稳定性。 其他改进包括使用QR因子分析进行时间和平方根协方差和卡尔曼增益矩阵的测量更新，以及使用模拟退火确保产生全局最优估计。

公开(公告)号：US5880959A

公开(公告)日：1999-03-09

申请号：US977781

申请日：1997-11-25

Applicant: Sunil C. Shah ,  Pradeep Pandey

Inventor： Sunil C. Shah ,  Pradeep Pandey

IPC: G05B17/02 ,  G06F17/50 ,  G06F19/00

CPC classification number: G06F17/50 ,  G05B17/02

Abstract: A method for computer-aided design. The method includes the steps of representing a computer-aided design activity as a design cycle and defining a goal of the design activity. The method also includes the steps of defining alternate design steps toward achieving the goal. According to one embodiment, the design activity is represented as a graph containing the alternate design steps. According to this embodiment, a cost metric is assigned for each of the alternate design steps that includes elements representing relative costs of taking each of a plurality of paths in the graph. Element values and bounds on the cost metric are the determined by searching the graph to project costs incurred upon execution of each of the alternate design steps to achieve the goal. The cost of achieving the goal is then optimized by selecting one of the alternate design steps associated with a smallest cost metric.

Abstract translation: 一种计算机辅助设计方法。 该方法包括将计算机辅助设计活动表示为设计周期并定义设计活动的目标的步骤。 该方法还包括为实现目标定义替代设计步骤的步骤。 根据一个实施例，设计活动被表示为包含替代设计步骤的图。 根据该实施例，为每个备选设计步骤分配成本度量，所述替代设计步骤包括表示在图中取多个路径中的每个路径的相对成本的元素。 成本指标的元素值和边界是通过搜索图来确定在执行每个替代设计步骤以实现目标时产生的成本。 然后通过选择与最小成本度量相关联的备选设计步骤之一来优化实现目标的成本。

公开(公告)号：US06289255B1

公开(公告)日：2001-09-11

申请号：US09199708

申请日：1998-11-24

Applicant: Sunil C. Shah ,  Pradeep Pandey

Inventor： Sunil C. Shah ,  Pradeep Pandey

IPC: G06F1900

CPC classification number: G05B17/02 ,  G06F17/50

Abstract: A method for computer-aided design. The method includes the steps of representing a computer-aided design activity as a design cycle and defining a goal of the design activity. The method also includes the steps of defining alternate design steps toward achieving the goal. According to one embodiment, the design activity is represented as a graph containing the alternate design steps. According to this embodiment, a cost metric is assigned for each of the alternate design steps that includes elements representing relative costs of taking each of a plurality of paths in the graph. Element values and bounds on the cost metric are the determined by searching the graph to project costs incurred upon execution of each of the alternate design steps to achieve the goal. The cost of achieving the goal is then optimized by selecting one of the alternate design steps associated with a smallest cost metric.

Abstract translation: 一种计算机辅助设计方法。 该方法包括将计算机辅助设计活动表示为设计周期并定义设计活动的目标的步骤。 该方法还包括为实现目标定义替代设计步骤的步骤。 根据一个实施例，设计活动被表示为包含替代设计步骤的图。 根据该实施例，为每个备选设计步骤分配成本度量，所述替代设计步骤包括表示在图中取多个路径中的每个路径的相对成本的元素。 成本指标的元素值和边界是通过搜索图来确定在执行每个替代设计步骤以实现目标时产生的成本。 然后通过选择与最小成本度量相关联的备选设计步骤之一来优化实现目标的成本。

公开(公告)号：US6041172A

公开(公告)日：2000-03-21

申请号：US980041

申请日：1997-11-26

Applicant: Sunil C. Shah ,  Pradeep Pandey ,  Mark A. Erickson

Inventor： Sunil C. Shah ,  Pradeep Pandey ,  Mark A. Erickson

IPC: G05B13/04 ,  G05B17/02 ,  G06F9/455

CPC classification number: G05B13/042 ,  G05B13/04 ,  G05B17/02

Abstract: A method for processing signals and controlling a physical system in which measurements are obtained at different time scales and/or different space scales. Signals generated from the physical system are processed by first creating a first dynamic model at a first time/space scale that consists of a first set of parameters, a first set of states and a first set of inputs. A second dynamic model at a second time/space scale is also created and consists of a second set of parameters, a second set of states and a second set of inputs. At least one of the first set of parameters in the first dynamic model are computed from the second set of states in the second dynamic model. A second estimator is then created to produce estimates of the second set of states using the second dynamic model, measurements from the first physical system at the second time scale. A first estimator is also created to produce estimates of the first set of states using the first dynamic model, measurements from the first physical system at the first time scale, and the estimates from the second estimator.

Abstract translation: 一种用于处理信号并控制在不同时间尺度和/或不同的空间尺度上获得测量的物理系统的方法。 通过首先在由第一组参数，第一组状态和第一组输入组成的第一时间/空间尺度上创建第一动态模型来处理从物理系统生成的信号。 还创建了第二时间/空间尺度的第二动态模型，并且包括第二组参数，第二组状态和第二组输入。 从第二动态模型中的第二组状态计算第一动态模型中的第一组参数中的至少一个。 然后创建第二估计器，以使用第二动态模型来产生第二组状态的估计，来自第二物理系统的第二时间尺度的测量。 还创建第一估计器，以使用第一动态模型产生第一组状态的估计，来自第一时间尺度的第一物理系统的测量值和来自第二估计器的估计值。

公开(公告)号：US06289508B1

公开(公告)日：2001-09-11

申请号：US09594462

申请日：2000-06-14

Applicant: Mark A. Erickson ,  Pradeep Pandey ,  Sunil C. Shah ,  Thorkell Gudmundsson

Inventor： Mark A. Erickson ,  Pradeep Pandey ,  Sunil C. Shah ,  Thorkell Gudmundsson

IPC: G06F945

CPC classification number: G05B13/042 ,  G05B13/04 ,  G05B17/02

Abstract: The present invention is a method and apparatus for dynamic optimization of a dynamic physical system having a device under control and a controller along with a modeling system having an estimator and a constrained nonlinear program. The time varying trajectories of the dynamic physical system are parameterized and run through the modeling system in order to produce a set of optimal time varying setpoint trajectories to be used in the dynamic physical system. The optimal time varying setpoint trajectories optimize the physical system to produce the desired end result (or product) of the dynamic physical system.

Abstract translation: 本发明是用于动态优化动态物理系统的方法和装置，其具有被控制的装置和控制器以及具有估计器和约束非线性程序的建模系统。 动态物理系统的时变轨迹被参数化并运行在建模系统中，以便产生要在动态物理系统中使用的一组最佳时变设定点轨迹。 最优时变设定点轨迹优化物理系统以产生动态物理系统的期望最终结果（或产品）。

公开(公告)号：US06285971B1

公开(公告)日：2001-09-04

申请号：US09372396

申请日：1999-08-10

Applicant: Sunil C. Shah ,  Pradeep Pandey

Inventor： Sunil C. Shah ,  Pradeep Pandey

IPC: G06F1750

CPC classification number: G05B13/04

Abstract: A method for the estimation of the state variables of nonlinear systems with exogenous inputs is based on improved extended Kalman filtering (EKF) type techniques. The method uses a discrete-time model, based on a set of nonlinear differential equations describing the system, that is linearized about the current operating point. The time update for the state estimates is performed using integration methods. Integration, which is accomplished through the use of matrix exponential techniques, avoids the inaccuracies of approximate numerical integration techniques. The updated state estimates and corresponding covariance estimates use a common time-varying system model for ensuring stability of both estimates. Other improvements include the use of QR factorization for both time and measurement updating of square-root covariance and Kalman gain matrices and the use of simulated annealing for ensuring that globally optimal estimates are produced.

Abstract translation: 用外推法估计非线性系统的状态变量的方法是基于改进的扩展卡尔曼滤波（EKF）类型技术。 该方法使用离散时间模型，基于描述系统的一组非线性微分方程，其关于当前工作点线性化。 使用集成方法执行状态估计的时间更新。 通过使用矩阵指数技术实现的集成避免了近似数值积分技术的不准确性。 更新的状态估计和相应的协方差估计使用通用的时变系统模型来确保两个估计的稳定性。 其他改进包括使用QR因子分析进行时间和平方根协方差和卡尔曼增益矩阵的测量更新，以及使用模拟退火确保产生全局最优估计。

公开(公告)号：US07864692B1

公开(公告)日：2011-01-04

申请号：US09710487

申请日：2000-11-10

Applicant: John Josef Hench ,  Thorkell Gudmundsson ,  Ioannis Kanellakopoulos ,  Sunil C. Shah ,  Gurcan Aral ,  Yaolong Tan

Inventor： John Josef Hench ,  Thorkell Gudmundsson ,  Ioannis Kanellakopoulos ,  Sunil C. Shah ,  Gurcan Aral ,  Yaolong Tan

IPC: H04L12/26

CPC classification number: H04L41/046 ,  H04B3/32 ,  H04B3/487 ,  H04L1/20 ,  H04L25/0204 ,  H04L25/03305 ,  H04L27/2608 ,  H04L41/06 ,  H04L41/147 ,  H04L43/00 ,  H04L43/0811 ,  H04L43/50 ,  H04L2025/03414 ,  H04M3/2209 ,  H04M3/244 ,  H04M3/30 ,  H04M3/303 ,  H04Q3/0087

Abstract: A method and apparatus are disclosed for the prediction and optimization of a communications system. The present invention provides for the prediction and optimization of the performance of a communications system comprising the steps of inputting a plurality of channels, predicting a performance of each channel using a plurality of parameters to characterize the performance of the channel, and possibly optimizing the parameters of each channel according to a design criteria.

Abstract translation: 公开了一种用于预测和优化通信系统的方法和装置。 本发明提供了对通信系统的性能的预测和优化，包括以下步骤：输入多个信道，使用多个参数来预测每个信道的性能以表征信道的性能，并且可能优化参数 根据设计标准。