公开(公告)号：US09798318B2

公开(公告)日：2017-10-24

申请号：US14252444

申请日：2014-04-14

Applicant: General Electric Company

Inventor： Ahmed My Cheta ,  Mark Eugene Shepard ,  Seth Andrew Hendrickson ,  Benjamin David Laskowski ,  Patrick Nkrumah Adasa ,  Mohamed Ahmed Aljahmi ,  Andrew David McArthur

IPC: G05B19/418 ,  G06F17/14

CPC classification number: G05B19/4184 ,  G05B23/0256 ,  G05B2219/41417 ,  G06F17/141 ,  Y02P90/14

Abstract: A system may include a controller that may control operations of a device according to a control loop and characterize a frequency response of the device while the device is operating. The controller may characterize the frequency response by adding a perturbation signal to any signal in the control loop. The controller may then determine a first transformed signal by performing a first discrete Fourier transform on a first signal in the control loop at a frequency of the perturbation signal and determine a second transformed signal by performing a second discrete Fourier transform on a second signal in the control loop at the frequency of the perturbation signal. The controller may then determine the frequency response at the frequency by comparing a first amplitude and a first phase of the first transformed signal to a second amplitude and a second phase of the second transformed signal.

公开(公告)号：US20160048125A1

公开(公告)日：2016-02-18

申请号：US14252444

申请日：2014-04-14

Applicant: General Electric Company

Inventor： Ahmed MY Cheta ,  Mark Eugene Shepard ,  Seth Andrew Hendrickson ,  Benjamin David Laskowski ,  Patrick Nkrumah Adasa ,  Mohamed Ahmed Aljahmi ,  Andrew David McArthur

IPC: G05B19/418 ,  G06F17/14

CPC classification number: G05B19/4184 ,  G05B23/0256 ,  G05B2219/41417 ,  G06F17/141 ,  Y02P90/14

Abstract: A system may include a controller that may control operations of a device according to a control loop and characterize a frequency response of the device while the device is operating. The controller may characterize the frequency response by adding a perturbation signal to any signal in the control loop. The controller may then determine a first transformed signal by performing a first discrete Fourier transform on a first signal in the control loop at a frequency of the perturbation signal and determine a second transformed signal by performing a second discrete Fourier transform on a second signal in the control loop at the frequency of the perturbation signal. The controller may then determine the frequency response at the frequency by comparing a first amplitude and a first phase of the first transformed signal to a second amplitude and a second phase of the second transformed signal.

Abstract translation: 系统可以包括控制器，其可以根据控制回路来控制设备的操作，并且在设备运行时表征设备的频率响应。 控制器可以通过向控制回路中的任何信号添加扰动信号来表征频率响应。 然后，控制器可以通过对扰动信号的频率对控制环路中的第一信号执行第一离散付里叶变换来确定第一变换信号，并且通过对第二信号执行第二离散付里叶变换来确定第二变换信号 在扰动信号的频率处的控制回路。 然后，控制器可以通过将第一变换信号的第一幅度和第一相位与第二变换信号的第二幅度和第二相位进行比较来确定频率处的频率响应。