mirror of https://github.com/ArduPilot/ardupilot
47 lines
1.3 KiB
Markdown
47 lines
1.3 KiB
Markdown
# Testing SITL battery model
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This example allows the built in battery model to be evaluated. The battery is defined by the parameters in a json configuration file, such as [this one](../../../../Tools/autotest/models/Callisto.json).
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The example only works with the linux target. Configure and build with:
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```
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./waf configure --board linux
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./waf build --targets examples/EvaluateBatteryModel
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```
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The example can then be run, the first argument is the path to the json model definition. The second is the constant current draw to apply.
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The command:
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```
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./build/linux/examples/EvaluateBatteryModel Tools/autotest/models/Callisto.json 50
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```
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Gives the output:
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```
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Loading model Tools/autotest/models/Callisto.json
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Loaded model params from Tools/autotest/models/Callisto.json
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Simulating 50.40v, 44.00 ah battery with resistance of 0.024000
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Voltage from 50.40 to 35.28 with constant current draw of 50.00
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time, voltage
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0.00, 49.20
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0.05, 49.20
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0.10, 49.20
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0.15, 49.20
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0.20, 49.20
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0.25, 49.20
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0.30, 49.20
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....
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...
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```
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This can be output re-directed to a file with:
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```
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./build/linux/examples/EvaluateBatteryModel Tools/autotest/models/Callisto.json 50 >> battery_test.csv
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```
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The data can then be compared to real battery data and the model definition changed to better represent the vehicle being modelled.
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