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Wolfram Language & System Documentation Center
SystemModelMeasurements
  • See Also
    • SystemModel
    • SystemModelSimulate
    • StateSpaceModel
    • StateResponse
    • OutputResponse
    • SystemModelSimulateSensitivity
    • SystemModelPlot
    • ConnectSystemModelController
  • Related Guides
    • System Model Analytics & Design
    • See Also
      • SystemModel
      • SystemModelSimulate
      • StateSpaceModel
      • StateResponse
      • OutputResponse
      • SystemModelSimulateSensitivity
      • SystemModelPlot
      • ConnectSystemModelController
    • Related Guides
      • System Model Analytics & Design

SystemModelMeasurements[sspec]

computes measurement properties for the system specification sspec.

SystemModelMeasurements[sspec,prop]

computes the property prop.

SystemModelMeasurements[sim,…]

computes properties for the SystemModelSimulationData object sim.

Details and Options
Details and Options Details and Options
Examples  
Basic Examples  
Scope  
Basic Uses  
Properties  
System Specification  
Options  
Method  
ProgressReporting  
TargetUnits  
Applications  
Basic Applications  
Ball and Beam  
Camera Stabilizer  
Quadcopter Drone  
Properties & Relations  
See Also
Related Guides
Related Links
History
Cite this Page
BUILT-IN SYMBOL
  • See Also
    • SystemModel
    • SystemModelSimulate
    • StateSpaceModel
    • StateResponse
    • OutputResponse
    • SystemModelSimulateSensitivity
    • SystemModelPlot
    • ConnectSystemModelController
  • Related Guides
    • System Model Analytics & Design
    • See Also
      • SystemModel
      • SystemModelSimulate
      • StateSpaceModel
      • StateResponse
      • OutputResponse
      • SystemModelSimulateSensitivity
      • SystemModelPlot
      • ConnectSystemModelController
    • Related Guides
      • System Model Analytics & Design

SystemModelMeasurements

SystemModelMeasurements[sspec]

computes measurement properties for the system specification sspec.

SystemModelMeasurements[sspec,prop]

computes the property prop.

SystemModelMeasurements[sim,…]

computes properties for the SystemModelSimulationData object sim.

Details and Options

  • SystemModelMeasurements is typically used to quantify system performance and quality by measuring how it responds to a step input.
  • The measurements only make sense for stable systems, i.e. systems for which bounded inputs result in bounded outputs.
  • The system sys can have the following forms:
  • StateSpaceModel[…]state-space model
    TransferFunctionModel[…]transfer function model
    AffineStateSpaceModel[…]affine state-space model
    NonlinearStateSpaceModel[…]non-linear state-space model
    DiscreteInputOutputModel[…]discrete input-output model
    SystemModel[…]general system model
    <|…|>detailed system specification sspec given as an Association
  • The system specification sspec can have the following keys:
  • "Model"sysany one of the models with inputs
    "SimulationInterval"Automaticsimulation interval {tinit,tfinal}
    "Inputs"Allinputs to turn on {u1,…}
    "Outputs"Automaticvariables to measure {y1,…}
  • For a system with multiple inputs, measurements are performed with each input turned on one at a time.
  • Measurement properties typically depend on the initial value, yinit, and final value, yfinal, of the measured output y.
  • Time properties prop include:
  • "RiseTime"time for output to change from 10% to 90% of the final value
    "DelayTime"time for output to reach 50% of the final value
    "TransientTime"time for output transients to subside, i.e. TemplateBox[{{{y, (, t, )}, -, {y, _, {(, final, )}}}}, Abs]/max_t TemplateBox[{{{y, (, t, )}, -, {y, _, {(, final, )}}}}, Abs]<=0.02 for
    "SettlingTime"time for output to settle, i.e. for
    "MinValueTime"time tmin for output to reach the minimum ymin, i.e.
    "MaxValueTime"time tmax for output to reach the maximum ymax, i.e.
  • Value properties prop include:
  • "InitialValue"initial value yinit, i.e.
    "FinalValue"final value yfinal, i.e.
    "MaxOvershootPercent"maximum percent of signal excess beyond yfinal, i.e.
    "MaxUndershootPercent"maximum percent of signal excess beyond yinit, i.e.
    "MinValue"minimum value
    "MaxValue"maximum value
    "SettlingMinValue"
  • minimum value
  • ysmin once the output has risen, i.e. for
    "SettlingMaxValue"
  • minimum value
  • ysmax once the output has risen, i.e. for
  • Response properties prop include:
  • InterpolatingFunction[…]"Response"response signal
    "Plot"response plot
  • The following options can be given:
  • Method Automaticmeasurement method
    ProgressReporting $ProgressReportingcontrol display of progress
    TargetUnits Noneunits in measurement properties
  • Method settings take the form Method{"sub1"val1,…}.
  • Method suboptions "subi" include:
  • "RiseTimeLowerThreshold"0.1fraction of signal change at start of rise time
    "RiseTimeUpperThreshold"0.9fraction of signal change at end of rise time
    "DelayTimeThreshold"0.5
  • fraction of signal change at end of delay time
  • "SettlingTimeThreshold"0.02settling time threshold
  • The option TargetUnits controls the units of quantities in measurement properties:
  • Noneno unit (default)
    "Unit"unit defined in model
    "DisplayUnit"display unit defined in model
    unitexplicit unit
    {unitt,unit}units for time and data

Examples

open all close all

Basic Examples  (3)

Compute measurement properties for a model:

Compute the settling time for a single-output model:

Compute measurement properties for simulation data:

Compute the rise time for the simulated variable:

Scope  (13)

Basic Uses  (4)

Compute measurements for a SystemModel:

Compute measurements for an AffineStateSpaceModel:

Compute measurements for a discrete multiple-input multiple-output StateSpaceModel:

Compute measurements for SystemModelSimulationData:

Properties  (5)

Compute the maximum overshoot for a single-output model:

Compute the settling time for a model:

Compute the maximum and minimum values for a model:

Compute the response for a single-output model:

Plot the response for a single-output model:

System Specification  (4)

Specify a custom simulation interval:

Specify a custom set of inputs to turn on:

Specify a custom set of variables to measure:

Specify both a custom set of inputs to turn on and a custom set of variables to measure:

Options  (7)

Method  (3)

Set custom rise time thresholds:

Set a custom settling time threshold:

Set a custom delay time threshold:

ProgressReporting  (1)

Control progress reporting with ProgressReporting:

TargetUnits  (3)

Compute measurements with the output units defined in the model:

Compute measurements with the time and output units defined in the model:

Compute measurements with custom time and output units:

Applications  (7)

Basic Applications  (4)

Study how the settling time varies with the location of poles for a discrete-time system:

Compute the closed-loop system for several different designs based on pole locations:

Compute the setting times for the resulting systems:

Show the pole location and the corresponding settling time:

Or look at the actual step responses:

Study how overshoot varies with the location of poles for a discrete-time system:

Compute the closed-loop system for several different designs based on pole locations:

Compute the maximum overshoot for the resulting systems:

Show the pole location and the corresponding maximum overshoot:

Or look at the actual step responses:

Study how the settling time varies with the location of poles for a continuous-time system:

Compute the closed-loop system for several different designs based on pole locations:

Compute the setting times for the resulting systems:

Show the pole location and the corresponding settling time:

Or look at the actual step responses:

Study how the overshoot varies with the location of poles for a continuous-time system:

Compute the closed-loop system for several different designs based on pole locations:

Compute the maximum overshoot for the resulting systems:

Show the pole location and the corresponding maximum overshoot:

Or look at the actual step responses:

Ball and Beam  (1)

Study a controlled system of a ball placed at the top of a beam:

When passing an input torque, the controller responds by moving the ball to a position off-center that cancels it:

With all torques cancelled, the angle of the beam goes back to 0:

Compute the time it takes the system to settle:

Camera Stabilizer  (1)

Start with a model of a camera attached to the top of a moving vehicle:

Simulate the model with a vertical force perturbation:

Compute the extremes for the position of the camera and plot the full response:

Linearize the model around the equilibrium point:

Design a controller:

Generate a closed-loop system for the controlled model:

Simulate the closed-loop system with the same perturbation:

The camera oscillations are now 10 times smaller:

The magnitude of the control effort is within reason:

Quadcopter Drone  (1)

Start with a model of a quadcopter drone:

Design a controller that tracks the altitude of the drone:

Introduce an observer with EstimatorRegulator and produce the closed-loop system:

When a unit step input is provided as reference, the drone elevates in a few seconds to the desired height:

Properties & Relations  (2)

The "Response" measurement property is computed with SystemModelSimulate:

Simulate with UnitStep as input and extract the response:

The "Plot" measurement property is computed with SystemModelPlot:

SystemModelPlot has multiple options to customize plots as desired:

See Also

SystemModel  SystemModelSimulate  StateSpaceModel  StateResponse  OutputResponse  SystemModelSimulateSensitivity  SystemModelPlot  ConnectSystemModelController

Related Guides

    ▪
  • System Model Analytics & Design

Related Links

  • ▪ Wolfram System Modeler Documentation

History

Introduced in 2022 (13.2)

Wolfram Research (2022), SystemModelMeasurements, Wolfram Language function, https://reference.wolfram.com/language/ref/SystemModelMeasurements.html.

Text

Wolfram Research (2022), SystemModelMeasurements, Wolfram Language function, https://reference.wolfram.com/language/ref/SystemModelMeasurements.html.

CMS

Wolfram Language. 2022. "SystemModelMeasurements." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/SystemModelMeasurements.html.

APA

Wolfram Language. (2022). SystemModelMeasurements. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/SystemModelMeasurements.html

BibTeX

@misc{reference.wolfram_2025_systemmodelmeasurements, author="Wolfram Research", title="{SystemModelMeasurements}", year="2022", howpublished="\url{https://reference.wolfram.com/language/ref/SystemModelMeasurements.html}", note=[Accessed: 01-December-2025]}

BibLaTeX

@online{reference.wolfram_2025_systemmodelmeasurements, organization={Wolfram Research}, title={SystemModelMeasurements}, year={2022}, url={https://reference.wolfram.com/language/ref/SystemModelMeasurements.html}, note=[Accessed: 01-December-2025]}

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