Class / Patent application number | Description | Number of patent applications / Date published |
700038000 | Having perturbation | 6 |
20120239166 | EXTREMUM SEEKING CONTROL WITH RESET CONTROL - An extremum seeking control method optimizes a control process for a plant such as an air handling unit. The method compensates for abrupt changes in the operation of the plant by resetting the extremum seeking control strategy in response to a detection of the abrupt change. | 09-20-2012 |
20130204403 | Apparatus and Methods for Non-Invasive Closed Loop Step Testing Using a Tunable Trade-Off Factor - An integrated multivariable predictive controller (MPC) and tester is disclosed. The invention system provides optimal control and step testing of a multivariable dynamic process using a small amplitude step for model identification purposes, without moving too far from optimal control targets. A tunable parameter specifies the trade-off between optimal process operation and minimum movement of process variables, establishing a middle ground between running a MPC on the Minimum Cost setting and the Minimum Move setting. Exploiting this middle ground, embodiments carry out low amplitude step testing near the optimal steady state solution, such that the data is suitable for modeling purposes. The new system decides when the MPC should run in optimization mode and when it can run in constrained step testing mode. The invention system determines when and how big the superimposed step testing signals can be, such that the temporary optimization give-away is constrained to an acceptable range. | 08-08-2013 |
20160048125 | ONLINE FREQUENCY RESPONSE CHARACTERIZATION SYSTEM AND METHOD - 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. | 02-18-2016 |
700039000 | Test signal | 3 |
20080300697 | Measurement Project Analyzer - System and method for creating a measurement application. User input specifying a sequence of functions implementing a measurement application is received, where the sequence of functions are executable to perform a specified task utilizing one or more hardware devices, and where the user input further specifies the hardware devices. Configuration of the measurement application is automatically analyzed according to rules specifying operation of the sequence of functions and the hardware devices. One or more errors in the measurement application are automatically determined based on the analyzing, and error information regarding the errors is displayed on a computer display, where the error information is usable to modify the measurement application to correct the one or more errors. In response to the error information, user input modifying the measurement application to correct the one or more errors may be received and/or the measurement application may be automatically modified to correct the errors. | 12-04-2008 |
20090299499 | Correction Signals - This document describes a correction signal usable to correct an effect of a disturbance signal on a controlled system or apparatus. In one case this document describes ways in which to diminish a future change to an output signal based on determining that a disturbance signal consistently precedes the future change. | 12-03-2009 |
20100121468 | APPARATUS AND METHOD FOR CHARACTERIZATION AND CONTROL OF USAGE DISTURBANCES IN A USAGE ENVIRONMENT OF PRINTERS AND OTHER DYNAMIC SYSTEMS - Dynamic systems with moving parts, such as printers and image forming apparatuses, for example, can shake as a result of reaction forces related to carriage movement. The characteristics of the shake are related to the particular usage environment and, therefore, can be different for the same dynamic system used in different environments. When the shake of a dynamic system is characterized while the dynamic system is in its particular usage environment, the shake can be reduced, for example, based on a degree of control specified by an operator, for every use in that same environment through adjustments based on the characterization. | 05-13-2010 |