v0.11.0

KiteModels v0.11.0

Diff since v0.10.0

KiteModels v.11.0 2026-02-20

Changed

• BREAKING: remove SymbolicAWEModels
• fix warnings and spelling errors
• improve find_steady_state!, print a warning if the solver fails
• test-steady-state-kps4.jl is now a separate test file
• all test files can be executed separately
• test files have been renamed, now all start with test-
• use workspaces for the test, examples, and docs folder
• all markdown files are now checked with markdownlint
• no more global variables in the main test scripts

Fixed

• all examples and tests that call find_steady_state! succeed now without warning
• other fixes of examples
• dead or wrong links in README.md and the documentation
• many JETLS warnings, only two left

Added

• configuration files from BestieTemplate.jl
• installer script bin/install
• a warning if find_steady_state! does not succeed

Merged pull requests:

• Remove symbolic AWE models (#255) (@ufechner7)
• Update NLSolve, fix NLsolve issue (#259) (@ufechner7)
• Add bestie files (#260) (@ufechner7)

Closed issues:

• Improve kite aerodynamic model (#51)
• Add tuning script to reduce the load time of models (#140)
• Implement the AbstractKiteModel interface (#151)
• Implement update_sys_state! functions of AKM (#155)
• Finalize KPS5 model (#156)
• Add a tutorial for the simplest kite possible (#210)
• Add syslog plotting functions to KiteModelsControlPlotsExt.jl (#211)
• Add version argument to scripts (#228)
• Use new package SymbolicAWEModels and remove symbolic code from this package (#240)
• Remove the symbolic code from this package (#254)

v0.10.0

KiteModels v0.10.0

Diff since v0.9.0

KiteModels v0.10.0 2026-02-06

Changed

• Support Julia 1.12
• Bump KitePodModels to 0.4.0
• Bump KiteUtils to 0.11.1
• Breaking: rename c_spring to axial_stiffness and damping to `axial_damping
• Breaking: rename force to winch_force when SysState is referred to
• Make tests more robust by deleting unused files from the temporary directory and by increasing tolerances
• Fix the linearisation example.

Added

• the configuration file .JETLSConfig.toml
• the script reuse_lint to check the licenses

Merged pull requests:

• Remove SymbolicAWEModel code from the package (#247) (@1-Bart-1)
• Benchmark simplify operation (#250) (@ufechner7)
• Add benchmark for simplify to runtests.jl (#251) (@ufechner7)
• Bump actions/checkout from 4 to 5 (#252) (@dependabot[bot])

Closed issues:

• Create a benchmark for simplify (#249)

v0.9.0

KiteModels v0.9.0

Diff since v0.8.1

Changed

• BREAKING: rename init_sim! to init!
• removed the parameter upwind_dir! from init!; use set.upwind_dir instead. Careful: This is in degrees.
• the function init! accepts (and ignores) the parameters delta and stiffness_factor if applied to a
  SymbolicAWEModel
• bump KiteUtils.jl to v0.10.15
• bump AtmosphericModels to v0.3.0, the first version that supports turbulent wind fields

Added

• add the test script test_interface.jl
• add the field integrator to KPS4 and KPS3 structs

Merged pull requests:

• Tests for implementing AKM constructors (#241) (@ufechner7)
• Init interface (#242) (@ufechner7)
• Bump AtmosphericModels (#244) (@ufechner7)
• Update KiteUtils (#245) (@1-Bart-1)

Closed issues:

• Implement AKM constructors (#152)
• Implement AKM init! functions (#153)
• System initialization on Julia 1.10 is slow (#233)
• Investigate the quasi-static model (#239)

v0.8.1

KiteModels v0.8.1

Diff since v0.8.0

CHANGED

• renamed POWER to POWER_LINE and STEERING to STEERING_LINE
• improved documentation, fixed example

v0.8.0

KiteModels v0.8.0

Diff since v0.7.4

Added

• add a tutorial for custom system structures
• add documentation for SystemStructure components #229
• add the Transform struct which defines initial orientation of the SystemStructure #214
• add a custom amount of kites to the SystemStructure #208
• make model initialization faster #222
• implement missing methods for the SymbolicAWEModel #198

Changed

• fixed the performance regression when using the KPS4 model with a winch model of type AsyncMachine
• improved the script create_sys_image; it is now also available if you install the package without using git
• make model initialization faster #222
• make next_step! return nothing #213
• BREAKING: Changed the names of RamAirKite to SymbolicAWESystem and PointMassSystem to SystemStructure #208

Merged pull requests:

• Add missing methods (#198) (@1-Bart-1)
• Remove measurement struct (#200) (@1-Bart-1)
• Bump KiteUtils (#203) (@ufechner7)
• Modify init_sim! (#204) (@1-Bart-1)
• Add plotting extension (#207) (@1-Bart-1)
• Add a custom amount kites (#208) (@1-Bart-1)
• Make next_step! return nothing (#213) (@1-Bart-1)
• Add transform struct (#214) (@1-Bart-1)
• Use brake for AsyncMachine, add @inbounds (#221) (@ufechner7)
• Serialize the getters and other fields (#222) (@1-Bart-1)
• Add input functions (#224) (@1-Bart-1)
• Fix CI.yml (#226) (@1-Bart-1)
• Add important documentation to the structs in src/system_structure.jl (#229) (@1-Bart-1)

Closed issues:

• Example input_output_function.jl fails (#141)
• Performance regression in version 0.7.0 (#160)
• Add VortexStepMethod to package diagram (#161)
• Improve update_sys_state!() for RamAirKite (#165)
• Add option for multiple kites (#167)
• Improve SystemStructure docs (#169)
• Enforce the assumption that one unique settings file should lead to one unique problem name and RamAirKite (#170)
• Implement missing methods for ram air kite (#194)
• Install run_julia and create_sys_image with install_examples() (#195)
• Remove the Measurement struct (#199)
• Implement the input functions for RamAirKite (#201)
• Modify init_sim!(s::RamAirKite, ...; ...) (#202)
• The next_step!() functions must have the same return value(s) for all kite models (#205)
• Add Transform struct to SystemStructure (#209)
• Change the names of RamAirKite to SymbolicAWESystem and PointMassSystem to SystemStructure (#212)
• Serialize the getter and setter functions (#217)
• Add examples to the docs (#223)
• CI installs matplotlib twice (#225)
• Disable pre-compilation when creating a system image (#231)

v0.7.4

KiteModels v0.7.4

Diff since v0.7.3

Added

• added licenses to each file, the command pipx run reuse lint succeeds now
• add the command above to the CI scripts
• the script create_xz_file
• the option to linearize the RamAirKite system using ModelingToolkit
• a simplified ram air kite model for faster development and testing
• the example lin_ram_model.jl to show how to linearize a model
• add the page Examples RamAirKite do the documentation

Changed

• the example ram_air_kite.jl can now be run like this SIMPLE=true; include("examples/ram_air_kite.jl")
• the package Rotations is no longer re-exported
• improved documentation

Fixed

• small fixes of the RamAirKite model

Merged pull requests:

• Add simple model and linearization (#138) (@1-Bart-1)
• Cleanup, bump LinearSolve (#191) (@ufechner7)
• Fix ram model (#192) (@1-Bart-1)

Closed issues:

• Add script create_xz_model (#171)
• Add CITATION.cff file (#172)
• Creating a system image causes a segmentation fault (#180)
• Warning during pre-compilation (#190)

v0.7.3

KiteModels v0.7.3

Diff since v0.7.2

Fixed

• fix function update_sys_state!()

v0.7.2

KiteModels v0.7.2

Diff since v0.7.1

Changed

• bump KiteUtils to v0.10.5, which provides much more fields for in the SysState

v0.7.1

KiteModels v0.7.1

Diff since v0.7.0

Changed

• fixed or documented issues found by Aqua.jl
• made DSP a test dependency
• remove package OrdinaryDiffEqSDIRK
• improve documentation for RamAirKite

Added

• the examples calc_spectrum.jl and plot_spectrum.jl to the menu
• the quality insurance package Aqua.jl
• added the script update_default_manifest
• calculate side_slip angle in radian

Closed issues:

• Improve RamAirKite code quality (#102)
• Priorities/Roadmap for RamAirKite (#103)
• Enforce reinit! with reinit_dae=true for the quasi-static model (#125)
• Serialize ODEProblemExpr using JLD2 (#143)
• Add Aqua.jl for quality insurance (#147)
• Remove package OrdinaryDiffEqSDIRK (#148)
• Calculate the side slip angle correctly (#162)

v0.7.0

KiteModels v0.7.0

Diff since v0.6.17

Fixed

• fixed broken installation by freezing NLSolversBase to ~7.8.3 in Project.toml

Added

• added mwe_26.jl for debugging the initial state solver
• the example ram_air_kite.jl
• the struct PointMassSystem for easy definition of the kite power system

Changed

• BREAKING: the model KPS_3L was renamed to RamAirKite
• the RamAirKite model is using the VortexStepMethod with a deforming wing now
• bump KiteUtils to v0.10
• bump ModellingToolkit to 9.72
• bump VortexStepMethod to 1.2.5
• the file CONTRIBUTING.md was updated

Merged pull requests:

• 4-Tether kite with VortexStepMethod.jl for aerodynamic analysis. (#108) (@1-Bart-1)
• Fix tests and update packages (#117) (@ufechner7)
• Fix allocation tests (#119) (@ufechner7)
• Add an option for a quasi-static model (#121) (@1-Bart-1)
• Revert "Add an option for a quasi-static model" (#122) (@1-Bart-1)
• Revert the pull request revert (#124) (@1-Bart-1)
• Add caching and simplify the ram air kite example (#128) (@1-Bart-1)
• Fix the numerical instability of the quasi-static model (#129) (@1-Bart-1)
• Get the correct AoA from VSM (#133) (@1-Bart-1)
• Catch and rebuild corrupt bin files and improve pre-compilation (#135) (@ufechner7)

Closed issues:

• Auto calculate optimal trim angle (#75)
• Vortex Step Method (#109)
• Fast constrained initialization for good tether state estimation. (#110)
• Qaternion kite model (#111)
• Quaternion kite model (#112)
• Pulley bridle line system (#113)
• Add me as contributer and in copyright message (#114)
• Change the steady state solver to a NonlinearSolve.jl solver (#116)
• Improve caching of RamAirKite model (#123)
• The 6-segment quasi-static model fails (#126)
• Fix AoA calculation in examples/ram_air_kite.jl (#127)
• Precompile RamAirKite (#131)
• Deserialization fails (#134)
• Package fails on Julia 1.10 (#137)