公开(公告)号：US5812428A

公开(公告)日：1998-09-22

申请号：US853809

申请日：1997-05-09

申请人： Hehong Zou ,  Coy L. Hays

发明人： Hehong Zou ,  Coy L. Hays

IPC分类号： G05B13/02 ,  G05B13/04

CPC分类号： G05B13/042 ,  G05B13/021 ,  Y10S388/907

摘要： A process controller controls an integrating-type process based on a measured process variable and a set point. The process controller includes an error generating circuit, a non-integrating control circuit and an adaptive bias circuit. The error generating circuit generates an error signal based on a difference between the set point and the measured process variable. The control circuit generates a control signal as a function of the error signal. The adaptive bias circuit adds a bias value to the control signal, the measured process variable or the set point. The bias value is selectively updated as a function of the error signal to force the error signal toward zero.

摘要翻译： 过程控制器基于测量的过程变量和设定点来控制积分型过程。 过程控制器包括误差产生电路，非积分控制电路和自适应偏置电路。 误差产生电路基于设定点和测量过程变量之间的差产生误差信号。 控制电路产生作为误差信号的函数的控制信号。 自适应偏置电路将偏置值添加到控制信号，测量过程变量或设定点。 偏置值被有选择地更新为误差信号的函数，以迫使误差信号为零。

公开(公告)号：US5691896A

公开(公告)日：1997-11-25

申请号：US515410

申请日：1995-08-15

申请人： Hehong Zou ,  Kale P. Hedstrom ,  Jogesh Warrior ,  Coy L. Hays

发明人： Hehong Zou ,  Kale P. Hedstrom ,  Jogesh Warrior ,  Coy L. Hays

IPC分类号： G05B13/02 ,  G05B11/42 ,  G05B13/04 ,  G05B23/02

CPC分类号： G05B13/042 ,  G05B11/42

摘要： A process control system controls a process through a control output signal based on a set point and a measured process variable. The process control system includes a control circuit having a set point input, a process variable input and a control output. The control circuit generates the control output signal on the control output as a function of the set point received on the set point input and the measured process variable received on the process variable input. An auto-tuning circuit excites the process, estimates a process model based on a rising dead time, a rising rate-of-change, a falling dead time and a falling rate-of-change in the measured process variable and then tunes the control function to the process based on the process model. The auto-tuning circuit obtains robust results, but is computationally simple such that the circuit can be implemented with hardware or software in low-power and low-memory applications, such as in such in field-mounted control units.

摘要翻译： 过程控制系统通过基于设定点和测量过程变量的控制输出信号控制过程。 过程控制系统包括具有设定点输入，过程变量输入和控制输出的控制电路。 控制电路根据设定点输入端接收的设定点和过程变量输入端接收的测量过程变量，在控制输出端产生控制输出信号。 自动调谐电路激励该过程，基于上升的死区时间，上升的变化率，下降的死区时间和下降的测量过程变量的变化估计一个过程模型，然后调整控制 基于过程模型的过程的功能。 自动调谐电路获得了可靠的结果，但是在计算上很简单，因此电路可以在低功耗和低内存应用中的硬件或软件实现，例如在现场安装的控制单元中。

公开(公告)号：US06330525B1

公开(公告)日：2001-12-11

申请号：US09631094

申请日：2000-08-02

申请人： Coy L. Hays ,  Gary A. Lenz

发明人： Coy L. Hays ,  Gary A. Lenz

IPC分类号： G21C1700

CPC分类号： G05B23/0235

摘要： An apparatus and method for diagnosing rotating equipment commonly used in the factory and process control industry are provided. The apparatus and method are intended for use in assisting a maintenance engineer in the diagnosis of turbines, compressors, fans, blowers and pumps. The preferred embodiments are an apparatus and method for diagnosing pumps, with a focus on centrifugal pumps. The apparatus and method are based on the comparison of the current pump signature curves resulting from the acquisition of process variables from sensors monitoring the current condition of the pump and the original or previous pump performance curve from prior monitoring or knowledge of the pump geometry, installation effects and properties of the pumped process liquid. The diagnostic apparatus and method can be applied to any rotating machine, but the apparatus and method for pumps are described herein.

公开(公告)号：US06260004B1

公开(公告)日：2001-07-10

申请号：US09002053

申请日：1997-12-31

申请人： Coy L. Hays ,  Thomas A. Brunson ,  Gary A. Lenz

发明人： Coy L. Hays ,  Thomas A. Brunson ,  Gary A. Lenz

IPC分类号： G01L326

CPC分类号： G05B23/0235

摘要： An apparatus and method for diagnosing rotating equipment commonly used in the factory and process control industry are provided. The apparatus and method are intended for use in assisting a maintenance engineer in the diagnosis of turbines, compressors, fans, blowers and pumps. The preferred embodiments are an apparatus and method for diagnosing pumps, with a focus on centrifugal pumps. The apparatus and method are based on the comparison of the current pump signature curves resulting from the acquisition of process variables from sensors monitoring the current condition of the pump and the original or previous pump performance curve from prior monitoring or knowledge of the pump geometry, installation effects and properties of the pumped process liquid. The diagnostic apparatus and method can be applied to any rotating machine, but the apparatus and method for pumps are described herein.

摘要翻译： 提供了一种用于诊断工厂和过程控制行业常用旋转设备的设备和方法。 该装置和方法旨在用于帮助维护工程师诊断涡轮机，压缩机，风扇，鼓风机和泵。 优选的实施例是用于诊断泵的装置和方法，其重点在于离心泵。 该装置和方法是基于从监测泵的当前状况的传感器获取的过程变量获得的当前泵特征曲线和来自先前监测的原始或先前的泵性能曲线或泵几何形状，安装的知识 泵送液体的效果和性能。 诊断装置和方法可以应用于任何旋转机器，但是这里描述了泵的装置和方法。