7f9976d67c9b413b3a7211bad921b29eac7be179,trunk/SUAVE/Methods/Power/Battery/Sizing/initialize_from_energy_and_power.py,,initialize_from_energy_and_power,#,18

Before Change

    if max=="soft": //use softmax function (makes it differentiable)
        
        min_mass=np.minimum(energy_mass, power_mass)
        mass=mass+np.log(1.+np.exp(min_mass-mass))  //write it this way to prevent overflow
            
    battery.mass_properties.mass=mass
    battery.max_energy=battery.specific_energy*mass

After Change

    power_mass=power/battery.specific_power
    mass=np.maximum(energy_mass, power_mass)
    if max=="soft": //use softmax function (makes it differentiable)
        scaling=10.**(np.floor(np.log10(mass))-1) //make it so the exponentials are taking ~10 (closer numerically, while still differentiable)
        mass=scaling*np.log(np.exp(energy_mass/scaling)+np.exp(power_mass/scaling))  //write it this way to prevent overflow

    battery.mass_properties.mass=mass
    battery.max_energy=battery.specific_energy*mass

Instances