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Document Type: Example Program
NI Supported: Yes
Publish Date: Apr 3, 2009

Step Response of First and Second Order Systems

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Filename: step_response.vi
Requirements: View

NOTE: This example is no longer supported. Instead, National Instruments recommends you use the LabVIEW Control Design Toolkit. This toolkit provides VIs you can use to construct and analayze dynamic system models in transfer function, zero-pole-gain, and state-space form. Additionally, you can deploy discrete controller models to National Instruments Real-Time Series hardware.

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This example program demonstrates how to use GSIM VIs to obtain the step response of first- and second- order systems in the s-domain. In many applications, the desired performance characteristics of control systems are specified in terms of transient response to a step input. For example, the amount of the maximum overshoot directly indicates the relative stability of the system, and the settling time indicates how long the system response takes to settle within a specified percentage of the final value.

In this example, the numerator and the denominator of the transfer function are generated in the Case structure based on the order of the system. The Alphas are the denominator coefficients, and the Betas are the numerator coefficients. You can specify the order of the system and define the coefficients while the program is running.


Related Links:
LabVIEW Control Design Toolkit

Requirements


Filename: step_response.vi

Software Requirements


Application Software: LabVIEW Full Development System 6.0.2
Toolkits and Add-Ons: LabVIEW System Simulation and Design Toolset
Language(s): LabVIEW

 
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This example program (this "program") was developed by a National Instruments ("NI") Applications Engineer. Although technical support of this program may be made available by National Instruments, this program may not be completely tested and verified, and NI does not guarantee its quality in any way or that NI will continue to support this program with each new revision of related products and drivers. THIS EXAMPLE PROGRAM IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND AND SUBJECT TO CERTAIN RESTRICTIONS AS MORE SPECIFICALLY SET FORTH IN NI.COM'S TERMS OF USE (http://ni.com/legal/termsofuse/unitedstates/us/).