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TransferFunctionModel  Built-in Symbol TransferFunctionModel[g[s], s] represents the model of the transfer-function matrix g[s] with complex variable s.... https://reference.wolfram.com/language/ref/TransferFunctionModel.html

Wolfram Language Documentation

TransferFunctionTransform  Built-in Symbol TransferFunctionTransform[f, tf] transforms the TransferFunctionModel object tf using the transformation function f. https://reference.wolfram.com/language/ref/TransferFunctionTransform.html
TransferFunctionExpand  Built-in Symbol TransferFunctionExpand[tfm] expands polynomial terms in the numerators and denominators of the TransferFunctionModel tfm. https://reference.wolfram.com/language/ref/TransferFunctionExpand.html
TransferFunctionFactor  Built-in Symbol TransferFunctionFactor[tfm] factors the polynomial terms in the numerators and denominators of the TransferFunctionModel tfm. https://reference.wolfram.com/language/ref/TransferFunctionFactor.html
SystemsModelDelay  Built-in Symbol SystemsModelDelay[\[Delta]] represents a time delay of \[Delta] in a StateSpaceModel or TransferFunctionModel. https://reference.wolfram.com/language/ref/SystemsModelDelay.html
TransferFunctionZeros  Built-in Symbol TransferFunctionZeros[tfm] gives a matrix of roots of the numerators in the TransferFunctionModel tfm. TransferFunctionZeros[tfm, reg] only... https://reference.wolfram.com/language/ref/TransferFunctionZeros.html
TransferFunctionCancel  Built-in Symbol TransferFunctionCancel[tfm] cancels common poles and zeros in the TransferFunctionModel tfm. TransferFunctionCancel[tfm, crit] cancels only... https://reference.wolfram.com/language/ref/TransferFunctionCancel.html
TransferFunctionPoles  Built-in Symbol TransferFunctionPoles[tfm] gives a matrix of roots of the denominators in the TransferFunctionModel tfm. TransferFunctionPoles[tfm, reg]... https://reference.wolfram.com/language/ref/TransferFunctionPoles.html
ToDiscreteTimeModel  Built-in Symbol ToDiscreteTimeModel[lsys, \[Tau]] gives the discrete-time approximation, with sampling period \[Tau], of the continuous-time systems models... https://reference.wolfram.com/language/ref/ToDiscreteTimeModel.html
Basic Systems Modeling  Guide The Wolfram Language provides a very convenient and natural way to create and manipulate continuous- and discrete-time models of scalar and... https://reference.wolfram.com/language/guide/Modeling.html
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Demonstrations

Simulating Vehicle Suspension with a Simplified Quarter-Car Model The simplified quarter-car suspension model is basically a mass-spring-damper system with the car serving as the mass, the suspension coil... http://demonstrations.wolfram.com/SimulatingVehicleSuspensionWithASimplifiedQuarterCarModel/
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Resources

Deriving transfer equations of active filters with Wolfram Language - Online Technical Discussion Groups—Wolfram Community Wolfram Community forum discussion about Deriving transfer equations of active filters with Wolfram Language. Stay on top of important... https://community.wolfram.com/groups/-/m/t/1173578
Designing a Low Pass Active Filter - Online Technical Discussion Groups—Wolfram Community Wolfram Community forum discussion about Designing a Low Pass Active Filter. Stay on top of important topics and build connections by... https://community.wolfram.com/groups/-/m/t/1931732
[WSG22] Daily Study Group: Signals, Systems and Signal Processing - Online Technical Discussion Groups—Wolfram Community Wolfram Community forum discussion about [WSG22] Daily Study Group: Signals, Systems and Signal Processing. Stay on top of important topics... https://community.wolfram.com/groups/-/m/t/2527035
How can I plot a system's response depending on certain condition - Online Technical Discussion Groups—Wolfram Community Wolfram Community forum discussion about How can I plot a system's response depending on certain condition. Stay on top of important topics... https://community.wolfram.com/groups/-/m/t/3094156
Comb Filtering: New in Wolfram Language 11 https://www.wolfram.com/language/11/computational-audio/comb-filtering.html
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Blogs

Launching Version 12.3 of Wolfram Language & Mathematica—Wolfram Blog Mathematica and Wolfram Language 12.3 release with 111 new and 105 enhanced functions. Examples shown for: new conveniences, speed gains,... https://blog.wolfram.com/2021/05/20/launching-version-12-3-of-wolfram-language-mathematica/
Analyze and Simulate Control Systems in Wolfram|Alpha—Wolfram|Alpha Blog Mathematica 8 functions that analyze, design, and simulate a variety of systems, including Control Systems have been added to Wolfram|Alpha... https://blog.wolframalpha.com/2012/01/04/analyze-and-simulate-control-systems-in-wolframalpha/
Launching Version 12.3 of Wolfram Language & Mathematica—Stephen Wolfram Writings Mathematica and Wolfram Language 12.3 release with 111 new and 105 enhanced functions. Examples shown for: new conveniences, speed gains,... https://writings.stephenwolfram.com/2021/05/launching-version-12-3-of-wolfram-language-mathematica/

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Core Areas of the Wolfram Language Explorations into essential uses of the Wolfram Language. Discover innovations in visualization, calculus & algebra, machine learning,... https://www.wolfram.com/mathematica/core-areas/
Apply ARMA Filter to a Heavy-Tailed White Noise Process: New in Mathematica 10 https://www.wolfram.com/mathematica/new-in-10/enhanced-random-processes/apply-arma-filter-to-a-heavy-tailed-white-noise-pr.html
Affine Nonlinear Systems: New in Mathematica 10 https://www.wolfram.com/mathematica/new-in-10/nonlinear-control-systems/affine-nonlinear-systems.html
Circle Criterion: New in Mathematica 10 https://www.wolfram.com/mathematica/new-in-10/nonlinear-control-systems/circle-criterion.html
General Nonlinear Systems: New in Mathematica 10 https://www.wolfram.com/mathematica/new-in-10/nonlinear-control-systems/general-nonlinear-systems.html
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