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evo-thermal-sysid

System identification utilities for first-order thermal systems. Runs open-loop step tests on HVAC simulator, collects calibration data, fits first-order exponential model, outputs estimated parameters (K, tau) with fit quality metrics.

tasks-evolved/hvac-control/environment/skills/evo-thermal-sysid/SKILL.md

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Sep 10, 2026
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# evo-thermal-sysid

System identification for first-order thermal HVAC systems.

## Functions

- `run_calibration_test(sim, heater_power=50.0, duration=60.0)` - Run open-loop step test, returns calibration_log dict
- `first_order_step_response(t, K, tau, T_amb, U_step)` - First-order model: T_amb + K*U_step*(1-exp(-t/tau))
- `identify_system_params(calibration_log)` - Fit K and tau from calibration data using curve_fit
- `filter_temperature_data(temp_data, window_length=11, polyorder=2)` - Savitzky-Golay filter
- `calculate_fit_metrics(T_actual, T_predicted)` - Returns (r_squared, rmse)
- `save_calibration_results(calibration_log, estimated_params)` - Save JSON files to /root/

## Usage