Wheels Model

Inputs

Name	Units	Source / Comments	Parameter
Dynamic Rolling Radius	mm	Input	r_dynamic
Velocity Profile	km/h, sec, -	Input	velocities, times, gears
Motive Powers	kW	Calculated by Vehicle Model	motive_powers

Outputs

• Wheels Powers [kW] / wheels_powers
• Wheels Speeds [RPM] / wheels_speeds
• Wheels Torques [Nm] / wheels_torques

Source Code

def calculate_wheel_speeds(velocities, r_dynamic):
    return velocities * (30.0 / (3.6 * pi * r_dynamic))

def calculate_wheel_torques(wheel_powers, wheel_speeds):

    if isinstance(wheel_speeds, np.ndarray):
        return np.nan_to_num(wheel_powers / wheel_speeds * (30000.0 / pi))
    return wheel_powers / wheel_speeds * (30000.0 / pi) if wheel_speeds else 0.0

wheels.add_function(
        function=dsp_utl.bypass,
        inputs=['motive_powers'],
        outputs=['wheel_powers']
    )