v1.15.5

ControlSystems v1.15.5

Diff since v1.15.4

Merged pull requests:

• add option to draw an M circle in the Nyquist plot (#856) (@baggepinnen)
• make use of explicit rather than implicit imports of symbols (#922) (@baggepinnen)
• compress printing for very large statespace models (#965) (@baggepinnen)
• add loopshapingPD (#1040) (@baggepinnen)
• Improved example of creating a transfer function (#1053) (@hurak)
• Fix _default_dt for DelayLtiSystem (closes #544) (#1054) (@baggepinnen)
• Use oneunit in remaining tf/ss/zpk type-promotion sites (#1055) (@baggepinnen)
• Fix marginplot variable assignment for >5 phase margins (#1056) (@baggepinnen)
• Fix isstable for discrete Dual state-space to check eigenvalues (#1057) (@baggepinnen)
• Fix pid_tf coefficients for Ki=0 with first-order derivative filter (#1058) (@baggepinnen)
• Fix stepinfo crash when response does not reach risetime thresholds (#1059) (@baggepinnen)
• Guard out-of-bounds accesses in SisoZpk minreal (#1060) (@baggepinnen)
• Fix double-negative error message in TransferFunction call (#1061) (@baggepinnen)

Closed issues:

• append(delay(1.0), delay(1.0)) throws StackOverflowError (#309)
• Better tests for margin (#526)
• Small delay with step errors (#544)
• Different behavior of MIMO system construction on Julia 1.12 (#987)
• MatrixPencils - a new feature (#1027)
• Docs for tf: order of the coefficients of the numerator and denominator polynomials not specified (#1052)

v1.15.4

ControlSystems v1.15.4

Diff since v1.15.2

Merged pull requests:

• Add hysteresis nonlinearity (#1041) (@baggepinnen)
• bump DI compat (#1042) (@baggepinnen)
• fix gain margin crossing at zero freq (#1046) (@baggepinnen)
• import from right package (#1047) (@baggepinnen)
• simpler margin zero freq logic (#1048) (@baggepinnen)
• CompatHelper: bump compat for DiffEqBase to 7, (keep existing compat) (#1049) (@github-actions[bot])

Closed issues:

• Docs for margin (and marginplot): not stated if GM is in db or absolute, similarly if PM is in deg or rad (#1044)
• margin() does not compute all margins even when allMargins=true (#1045)

v1.15.2

ControlSystems v1.15.2

Diff since v1.15.1

Merged pull requests:

• reactivate aqua tests (#1023) (@baggepinnen)
• Add support for pure D systems in lsim function and corresponding tests (#1025) (@baggepinnen)
• Fix error handling in freqresp for compatibility with Julia v1.12 (#1026) (@baggepinnen)
• try to handle stack overflow in linter due to autovec (#1028) (@baggepinnen)
• Remove unused Polynomials constant from root_locus.jl (#1029) (@baggepinnen)
• system determinant (#1030) (@baggepinnen)
• handle RHP poles in margin (#1031) (@baggepinnen)
• add pz grid option to makie pzmap (#1037) (@baggepinnen)
• add isunstable (#1039) (@baggepinnen)

Closed issues:

• I cannot install version 1.15.1 (#1022)
• Lsim fails for pure gain systems (D matrix only) (#1024)
• precompile error (#1032)
• Non-native English speakers need help. (#1036)
• Troubles building the documentation (#1038)

v0.5.2

ControlSystems v0.5.2

Diff since v0.5.1

This release has been identified as a backport.
Automated changelogs for backports tend to be wildly incorrect.
Therefore, the list of issues and pull requests is hidden.

v1.15.1

ControlSystems v1.15.1

Diff since v1.15.0

Merged pull requests:

• fix #1020 (#1021) (@baggepinnen)

Closed issues:

• ControlSystems.jl fails to compile (#1020)

v1.15.0

ControlSystems v1.15.0

Diff since v1.14.0

• Add Makie recipes

Merged pull requests:

• optionally return additional arguments from lqr and kalman (#994) (@baggepinnen)
• improve robustness of hinfnorm (#1015) (@baggepinnen)
• add a few error hints for factorizations on exotic number types (#1016) (@baggepinnen)
• marginplot to support frequency display in Hertz (#1017) (@baggepinnen)
• Add Makie recipes for all plots (#1018) (@baggepinnen)

Closed issues:

• marginplot doesn't support the hz keyword argument (#827)
• hinfnorm failure case (#1014)

v1.14.0

ControlSystems v1.14.0

Diff since v1.13.1

Merged pull requests:

• add find_similarity_transform (#1000) (@baggepinnen)
• fix: handle poor type inference in count_eigval_multiplicity function (#1001) (@baggepinnen)
• handle exotic types in balance (#1003) (@baggepinnen)
• use new generic zeros from MatrixPencils (#1004) (@baggepinnen)
• Improve some docstrings (#1005) (@baggepinnen)
• handle MIMO tf feedback and division by converting to ss (#1007) (@baggepinnen)
• handle B matrix with non-full column rank in place (#1009) (@baggepinnen)
• add pole placement example (#1010) (@baggepinnen)
• make place return real matrix when expected (#1011) (@baggepinnen)
• add root-locus methods for matrix gains (#1012) (@baggepinnen)
• move root locus implementation to ControlSystemsBase (#1013) (@baggepinnen)

Closed issues:

• Docstring for nyquist uses im as an output argument –> clash with the imaginary unit im (#924)

v1.13.1

ControlSystems v1.13.1

Diff since v1.13.0

Merged pull requests:

• provide signal names to SimResult plot (#991) (@baggepinnen)
• use adaptive sampling for the frequency grid in bode and nyquist plots (#993) (@baggepinnen)
• add functions relating Ms peak to gain and phase margins (#996) (@baggepinnen)
• fix hover with adaptive sampling nyquist plot (#997) (@baggepinnen)
• move some examples to docstrings (#999) (@baggepinnen)

Closed issues:

• Observer with pole placement doesn't work for n=3 (#995)

v1.13.0

ControlSystems v1.13.0

Diff since v1.12.0

Merged pull requests:

• CompatHelper: bump compat for ForwardDiff to 1, (keep existing compat) (#977) (@github-actions[bot])
• add notes on solving for open loop from closed loop (#985) (@baggepinnen)
• implement typed_hvcat for LTI systems (#988) (@baggepinnen)
• Use algorithms for poles and zeros of rational matrices from MatrixPencils.jl (#990) (@baggepinnen)

Closed issues:

• Missing details in the docstring for Kalman (#986)
• minreal does not give a minimal realisation (#992)

v1.12.0

ControlSystems v1.12.0

Diff since v1.11.2

Merged pull requests:

• improve tf2ss conversion (#971) (@baggepinnen)
• use zero computations form MatrixPencils (#972) (@baggepinnen)
• enable tzeros for BigFloat (#976) (@baggepinnen)
• Bump ImplicitDifferentiation bound + run CompatHelper on subpackages (#980) (@gdalle)
• move phase adjustment to margin from marginplot (#981) (@baggepinnen)
• CompatHelper: add new compat entry for ComponentArrays in [weakdeps] at version 0.15 for package ControlSystemsBase, (keep existing compat) (#984) (@github-actions[bot])

Closed issues:

• ML-POSOC: Memory-Limited Partially Observable Stochastic Control and Its Mean-Field Control (#973)
• Q: Marginplot -- gain margin with setPlotScale("dB") (#979)