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add robot benchmark
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title: Multibody Robot, compilation and simulation performance | ||
author: Fredrik Bagge Carlson | ||
--- | ||
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This is a Multibody.jl model of a 6-axis industrial robot with 6 revolute joints. The first three joints are modeled as flexible. The robot is tracking a smooth, predefined reference trajectory. | ||
```julia | ||
cd(@__DIR__) | ||
using Pkg | ||
Pkg.activate(".") | ||
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using ModelingToolkit | ||
using Multibody | ||
using Multibody: Robot6DOF | ||
using JuliaSimCompiler | ||
using OrdinaryDiffEq | ||
using CairoMakie | ||
using Printf | ||
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time_instantiate = @elapsed @named robot = Robot6DOF() | ||
robot = complete(robot) | ||
time_simplify = @elapsed ssys = structural_simplify(IRSystem(robot)) | ||
time_prob = @elapsed prob = ODEProblem(ssys, [ | ||
robot.mechanics.r1.phi => deg2rad(-60) | ||
robot.mechanics.r2.phi => deg2rad(20) | ||
robot.mechanics.r3.phi => deg2rad(90) | ||
robot.mechanics.r4.phi => deg2rad(0) | ||
robot.mechanics.r5.phi => deg2rad(-110) | ||
robot.mechanics.r6.phi => deg2rad(0) | ||
robot.axis1.motor.Jmotor.phi => deg2rad(-60) * (-105) | ||
robot.axis2.motor.Jmotor.phi => deg2rad(20) * (210) | ||
robot.axis3.motor.Jmotor.phi => deg2rad(90) * (60) | ||
], (0.0, 4.0)) | ||
time_solve = @elapsed sol = solve(prob, Rodas5P(autodiff=false)); # With autodiff=true this takes over 150 seconds | ||
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tv = 0:0.01:4 | ||
time_extract_data = @elapsed data = sol(tv, idxs=[ | ||
robot.pathPlanning.controlBus.axisControlBus1.angle | ||
robot.pathPlanning.controlBus.axisControlBus2.angle | ||
robot.pathPlanning.controlBus.axisControlBus3.angle | ||
robot.pathPlanning.controlBus.axisControlBus4.angle | ||
robot.pathPlanning.controlBus.axisControlBus5.angle | ||
robot.pathPlanning.controlBus.axisControlBus6.angle | ||
robot.mechanics.r1.phi | ||
robot.mechanics.r2.phi | ||
robot.mechanics.r3.phi | ||
robot.mechanics.r4.phi | ||
robot.mechanics.r5.phi | ||
robot.mechanics.r6.phi | ||
robot.axis1.controller.feedback1.output.u | ||
robot.axis2.controller.feedback1.output.u | ||
robot.axis3.controller.feedback1.output.u | ||
robot.axis4.controller.feedback1.output.u | ||
robot.axis5.controller.feedback1.output.u | ||
robot.axis6.controller.feedback1.output.u | ||
]); | ||
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labels = ["Instantiate", "Simplify", "Problem creation", "Solve", "Extract data"] | ||
timings = [time_instantiate, time_simplify, time_prob, time_solve, time_extract_data] | ||
f = Figure() | ||
xs = 1:length(labels) | ||
points = Makie.Point.(xs .- 0.25, timings .+ 1) | ||
anns = [@sprintf("%3.3g", t) for t in timings] | ||
barplot(f[1,1], timings, axis=(; title="Timings", xticks = (xs, labels), limits = (nothing, (0, maximum(timings)*1.2 + 2)))) | ||
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annotations!(f[1,1], anns, points) | ||
barplot(f[2,1], timings, axis=(; title="Log Timings", xticks = (xs, labels), yscale=log10)) | ||
f | ||
``` | ||
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## OpenModelica | ||
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```julia | ||
using OMJulia | ||
mod = OMJulia.OMCSession(); | ||
OMJulia.sendExpression(mod, "getVersion()") | ||
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@show "Start OpenModelica Timings" | ||
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om_total = @elapsed begin | ||
om_build = @elapsed ModelicaSystem(mod, modelName="Modelica.Mechanics.MultiBody.Examples.Systems.RobotR3.FullRobot", library="Modelica") | ||
om_sim = @elapsed res = sendExpression(mod, "simulate(Modelica.Mechanics.MultiBody.Examples.Systems.RobotR3.FullRobot)") | ||
end | ||
@assert res["messages"][1:11] == "LOG_SUCCESS" | ||
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OMJulia.quit(mod) | ||
``` | ||
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## Comparison | ||
```julia | ||
colors = Makie.wong_colors() | ||
labels = ["Build", "Simulate", "Total"] | ||
julia_build = time_instantiate + time_simplify + time_prob | ||
julia_sim = time_solve + time_extract_data | ||
julia_total = julia_build + julia_sim | ||
dymola_build = sum([5.075, 3.912, 4.024])/3 | ||
dymola_total = sum([5.267, 4.112, 4.255])/3 | ||
dymola_sim = dymola_total - dymola_build | ||
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data = [ | ||
julia_build julia_sim julia_total | ||
om_build om_sim om_total | ||
dymola_build dymola_sim dymola_total | ||
] | ||
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xs = repeat(1:length(labels), inner=3) | ||
group = repeat([1,2,3], outer=3) | ||
fig = Figure() | ||
barplot(fig[1,1], xs, vec(data), dodge=group, color=colors[group], axis=(; title="Timings", xticks = ([1,2,3], labels))) | ||
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# Legend | ||
legendentries = ["Julia", "OpenModelica", "Dymola"] | ||
elements = [PolyElement(polycolor = colors[i]) for i in 1:length(legendentries)] | ||
title = "Contestants" | ||
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Legend(fig[1,2], elements, legendentries, title) | ||
fig | ||
``` | ||
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## Appendix | ||
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```julia, echo = false | ||
using SciMLBenchmarks | ||
SciMLBenchmarks.bench_footer(WEAVE_ARGS[:folder],WEAVE_ARGS[:file]) | ||
``` |