public bool Evaluate(out byte speed)
{
var temp = _temperature.RecentMaximum(TimeSpan.FromSeconds(15));
if (_currentMode == Mode.Idling)
{
var overheatAlpha = Mathf.Clamp((_maxTemperature - temp) / (float)(_maxTemperature - _overheatThreshold), 0, 1);
var overheatTimeAllowance = _maxOverheatAllowance * overheatAlpha;
if (_temperature.RecentPercentOverThreshold(overheatTimeAllowance, _overheatThreshold) > 0.9)
{
_currentMode = Mode.SustainedLoad;
}
}
else
{
if (_temperature.RecentPercentOverThreshold(_maxOverheatAllowance, _overheatThreshold) < 0.1)
{
_currentMode = Mode.Idling;
}
}
if (_currentMode == Mode.Idling)
{
speed = (byte)_quietProfile.Evaluate(temp);
}
else
{
speed = (byte)_sustainedProfile.Evaluate(temp);
}
return(temp <= _maxTemperature);
}
public void PercentOverThreshold(int minutes, byte threshold, float expected)
{
var now = DateTime.Now;
var record = new TemperatureRecord(TimeSpan.FromMinutes(40));
record.Push(now - TimeSpan.FromMinutes(30), 55);
record.Push(now - TimeSpan.FromMinutes(25), 54);
record.Push(now - TimeSpan.FromMinutes(10), 53);
record.Push(now - TimeSpan.FromMinutes(4), 52);
record.Push(now - TimeSpan.FromMinutes(3), 51);
var percent = record.RecentPercentOverThreshold(TimeSpan.FromMinutes(minutes), threshold);
Assert.Equal(expected, percent);
}