v1.0.0

ControlSystems v1.0.0

Diff since v0.12.17

• Breaking: Frequency-responses have changed data layout to ny×nu×nω from the previous nω×ny×nu. This is for performance reasons and to be consistent with time responses. This affects downstream functions bode and nyquist as well.
• Breaking: baltrunc and balreal now return the diagonal of the Gramian as the second argument rather than the full matrix.
• Breaking: The pid constructor no longer takes parameters as keyword arguments. pid has also gotten some new features, the new signature is pid(P, I, D=0; form = :standard, Ts=nothing, Tf=nothing, state_space=false). This change affects downstream functions like placePI, loopshapingPI, pidplots.
• Breaking: The semantics of broadcasted multiplication between two systems was previously inconsistent between StateSpace and TransferFunction. The new behavior is documented under Multiplying systems in the documentation. The new semantics is stricter than before, and some multiplication statements that previously used implicit broadcasting will now error with a message suggesting explicit broadcasting.

Closed issues:

• Broadcasting addition for mimo systems (#416)
• Non-broadcasted addition (#417)
• Return gramian or singular values from balreal (#533)
• more balanced state-space realization when converting from tf (#552)
• Automatic time scaling (#702)
• Add to noteworthy differences (#709)

Merged pull requests:

• Pid parameters updates (#509) (@albheim)
• add references to make getting started easier (#701) (@baggepinnen)
• Add time-scaling function. (#703) (@baggepinnen)
• add brief tutorial on delay systems (#704) (@baggepinnen)
• fix non-commutativity of multiplication for nonlinear systems (#705) (@baggepinnen)
• add advanced nonlinear example (#706) (@baggepinnen)
• add a number of missing tests (#707) (@baggepinnen)
• add tests for zpk (#708) (@baggepinnen)
• Pid parameters updates (#509) (#710) (@baggepinnen)
• Version 1.0 (#711) (@baggepinnen)
• Documentation improvements (#712) (@baggepinnen)
• add docs on creating MIMO systems and arrays of systems (#713) (@baggepinnen)
• make tf broadcast as ss (#714) (@baggepinnen)

v0.12.17

ControlSystems v0.12.17

Diff since v0.12.16

Merged pull requests:

• some improvements to design docs (#698) (@baggepinnen)
• add Mt_circles to nyquistplot (#700) (@baggepinnen)

v0.12.16

ControlSystems v0.12.16

Diff since v0.12.15

Merged pull requests:

• minor docs fixes (#696) (@baggepinnen)
• don't convert type of time vector (#697) (@baggepinnen)

v0.12.15

ControlSystems v0.12.15

Diff since v0.12.14

Merged pull requests:

• add minreal examples (#694) (@baggepinnen)
• improvements to gangoffour and gofplot (#695) (@baggepinnen)

v0.12.14

ControlSystems v0.12.14

Diff since v0.12.13

Merged pull requests:

• Link to a wider set of packages in the Julia ecosystem (#689) (@baggepinnen)
• set force_dtmin by default (#690) (@baggepinnen)
• Add Aqua.jl tests (#691) (@baggepinnen)
• introduce sensitivity function helpers (#692) (@baggepinnen)
• deactivate automatic balancing for Dual numbers (#693) (@baggepinnen)

v0.12.13

ControlSystems v0.12.13

Diff since v0.12.12

Merged pull requests:

• add links to docs (#685) (@baggepinnen)
• Add docs on numerical performance and accuracy (#686) (@baggepinnen)
• add docs on noteworthy difference from other languages (#687) (@baggepinnen)
• Add argument to nyquistplot for critical point (#688) (@Zinoex)

v0.12.12

ControlSystems v0.12.12

Diff since v0.12.11

Closed issues:

• Equivalent to Simulink "Saturation" block (#228)
• Update plotting changes in readme (#672)
• How to generate frequency-response data? (#677)
• Can't precompile ControlSystems (#678)
• Delays cause step and friends to error out. (#679)

Merged pull requests:

• add docs for nonlinear functionality (#671) (@baggepinnen)
• Update README.md (#673) (@baggepinnen)
• zpk conjugate pairup fails on 0.0 and -0.0 (#674) (@albheim)
• Correct nothing comparison (#675) (@albheim)
• add ILC tutorial (#680) (@baggepinnen)
• add docs on creating delay system (#681) (@baggepinnen)
• provide in-place version of lsim (#682) (@baggepinnen)
• Better bode performance (#683) (@baggepinnen)
• add constructors for workspaces (#684) (@baggepinnen)

v0.12.11

ControlSystems v0.12.11

Diff since v0.12.10

Merged pull requests:

• Nonlinear systems using LFT representation (#669) (@baggepinnen)

v0.12.10

ControlSystems v0.12.10

Diff since v0.12.9

Merged pull requests:

• don't balance systems with rational coefficients (#670) (@baggepinnen)

v0.12.9

ControlSystems v0.12.9

Diff since v0.12.8

Merged pull requests:

• deactivate broken features from bodeplot (#667) (@baggepinnen)
• faster lsim for cont systems (#668) (@baggepinnen)