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Continuous-Discrete Conversion

Model discretization, discrete to continuous time conversion, resampling

Control System Toolbox™ has commands for resampling dynamic system models or converting them between the continuous-time and discrete-time domains.

Functions

c2dConvert model from continuous to discrete time
d2cConvert model from discrete to continuous time
d2dResample discrete-time model
upsampleUpsample discrete-time models
c2dOptionsCreate option set for continuous- to discrete-time conversions
d2cOptionsCreate option set for discrete- to continuous-time conversions
d2dOptionsCreate option set for discrete-time resampling

Topics

Discretizing and Resampling Models

This example shows how to use the commands for continuous/discrete, discrete/continuous, and discrete/discrete conversions.

Discretize a Compensator

This example shows how to convert a compensator from continuous to discrete time using several discretization methods, to identify a method that yields a good match in the frequency domain.

Discretizing a Notch Filter

This example shows the comparison of several techniques for discretizing a notch filter.

Improve Accuracy of Discretized System with Time Delay

This example shows how to improve the frequency-domain accuracy of a system with a time delay that is a fractional multiple of the sample time.

Convert Discrete-Time System to Continuous Time

This example shows how to convert a discrete-time system to continuous time using d2c, and compares the results using two different interpolation methods.

Continuous-Discrete Conversion Methods

Choose discretization and interpolation methods for converting between continuous and discrete models.

Upsample Discrete-Time System

This example shows how to upsample a system using both the d2d and upsample commands and compares the results of both to the original system.

Choosing a Resampling Command

Use resampling commands to change the sample time of a discrete-time system.