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)

v1.11.2

ControlSystems v1.11.2

Diff since v1.11.1

Merged pull requests:

• do not promote system type when creating a vector (#958) (@baggepinnen)
• remove some dependencies (#959) (@baggepinnen)
• move DSP to an extension (#960) (@baggepinnen)
• Fix negative phase margin (#962) (@baggepinnen)
• Extend docstring (#963) (@CasBex)
• Export PID conversion functions (#964) (@baggepinnen)
• allow more discretization methods in lsim (#966) (@baggepinnen)
• add backward euler discretization (#967) (@baggepinnen)
• add Padé approximation with different numerator and denominator degree (#968) (@baggepinnen)
• handle phase wrapping in margin (#969) (@baggepinnen)
• tweak computation of integrator excess (#970) (@baggepinnen)

Closed issues:

• margin() gives incorrect phase margin for system with negative margin (#961)

v1.11.1

ControlSystems v1.11.1

Diff since v1.11.0

Merged pull requests:

• add 2DOF pid constructor (#951) (@baggepinnen)
• make feedback2dof work for any system type (#952) (@baggepinnen)
• add filter_order option to pid (#953) (@baggepinnen)
• add support for setting filter damping in pid (#954) (@baggepinnen)
• add bodemag_nohess! (#955) (@baggepinnen)
• avoid some type issues arising with Symbolics (#956) (@baggepinnen)
• add fast path for kd=0 in pid_2dof (#957) (@baggepinnen)

Closed issues:

• Tests for pid_design.jl and discrete.jl (#58)
• ControlSystems + DSP (#92)
• Function tf and ss (#145)
• to_matrix (#224)
• Remove LaTeX in plot recipies (#383)
• Problems with getPhaseTicks and getLogTicks (#435)
• Luenberger/Ackermann pole placement for MIMO systems. (#456)
• Update docs for freqresp (#461)
• Help Request: Time Varying LQR Solution (#463)
• Deprecate norm? (#543)
• Remaining uses of plot (#610)
• Building a vector of both continuous and discrete (#665)
• Delay system in feedback path throws a method error (#762)
• LsimWorkspace not working for discrete transfer functions (#833)
• Implement /\ in terms of feedback (#901)

v1.11.0

ControlSystems v1.11.0

Diff since v1.10.5

Merged pull requests:

• fix #941 (#942) (@baggepinnen)
• add concatenation for SimResult (#945) (@baggepinnen)
• bump compat DSP (#946) (@baggepinnen)
• Add function for stable/unstable decomposition (#947) (@baggepinnen)
• remove use of Polyester.@batch due to segfault (#948) (@baggepinnen)
• widen the scope of ss*mat method (#949) (@baggepinnen)
• add tools for counting multiple eigvals and adjust bode phase start (#950) (@baggepinnen)

Closed issues:

• bode() returns only phases in interval +/- 180° (#422)
• margin throws an error when the system has delay (#941)
• augstate function for full-state feedback functionality. (#943)

v1.10.5

ControlSystems v1.10.5

Diff since v1.10.4

Merged pull requests:

• use eps of correct type in balreal (#927) (@baggepinnen)
• Update minreal docstring (#935) (@franckgaga)
• add fix for step with plotx and MIMO systems (#936) (@baggepinnen)
• add functions returning the resolvent of a system (#939) (@baggepinnen)
• bump compat DiffEqCallbacks (#940) (@baggepinnen)

Closed issues:

• Revisiting old code: was there ever an LTISystem composed type in ControlSystems.jl? (#938)

v1.10.4

ControlSystems v1.10.4

Diff since v1.10.3

Merged pull requests:

• Add "asymptotic" keyword to kalman docstring (#929) (@franckgaga)
• add \ for ss and handle some cases of multiplication with improper tf (#930) (@baggepinnen)
• Update zoh.md (#933) (@baggepinnen)
• handle non-identity uniform scalings in covar (#934) (@baggepinnen)

Closed issues:

• Optimization-based tuning–PID controller with Delay (#931)
• An incorrect formula in the documentation (#932)

v1.10.3

ControlSystems v1.10.3

Diff since v1.10.2

Merged pull requests:

• more helpful error message in baltrunc (#926) (@baggepinnen)
• bump compat DiffEqCallbacks (#928) (@baggepinnen)

Closed issues:

• B matrix cannot contain too many zero elements for baltrunc (#925)