Tag Archive: “kalman filter”

Oct
14

Control Using Wireless Measurements

During the initial development of WirelessHart we began researching how to address control applications that use a wireless measurement and/or wireless actuator. To extend battery life a wireless transmitter may be setup to communication the measurement value much slower than the update rate of a wired installation. Also, when the transmitter supports Window communications (as …

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Oct
07

Addressing Control in the Presence of Process and Measurement Noise

When a measurement used in a control application is characterized by a significant amount of process or measurement noise then to avoid taking control action on noise filtering may be applied in the transmitter or in the control system. However, when traditional filtering techniques are used it is necessary to increase the PID reset time …

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Sep
16

Application of the Kalman Filter in Process Control

A paper published in 1960 by Rudolf Kálmán “A New Approach to Linear Filtering and Prediction Problems” is the basis for the Kalman Filter. The Kalman filter uses a dynamics model, measured control input(s) and process measurement(s) to estimate the process output. A wide variety of applications have successfully utilized Kalman filtering:  The guidance of …

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Sep
09

Control Using Wireless Measurements

A number of technical challenges must be addressed when using a wireless measurement in closed loop control. In DeltaV v11 we introduced a PID option known as PIDPlus that may be selected when a wireless transmitter is used in a control application. When the PIDPlus option is selected then the same quality control as wired …

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Jun
10

Application of Kalman Filtering in DeltaV

A paper published in 1960 by Rudolf Kálmán “A New Approach to Linear Filtering and Prediction Problems” is the basis for the Kalman Filter. The Kalman filter has been successfully used in a wide variety of applications: • The guidance of commercial airplanes • Seismic data processing • Nuclear power plant instrumentation • Vehicle navigation …

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