ECMS_HEV_Python_SIMULINK

Real-time Optimal Control of Hybrid Electric Powertrains Equivalent consumption minimization strategy (ECMS) Optimization of Hybrid Vehicle Fuel Consumption in Python. Run the file 'HEV_ECMS.mdl'.

Files for the optimal control of parallel hybrid configurations using Equivalent consumption minimization strategy (ECMS)

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Vehicle Model

===================== HEV_ECMS.mdl - A basic vehicle model

Problem specific scrips and functions

===================================== init_HEV_ECMS.m - Initialize data parallelhybrid_ECMS.m - Torque Split function file

(C) 2020 Ruchit Bhikadiya

1. Main Assignment information: A hybrid vehicle has various possibilities of configurations. The parallel vehicle is the well known concepts. The parallel hybrid has a mechanical link (via transmission) from the combustion engine to the wheels. This means that for the parallel hybrid only the state of charge is optimized. The models for the parallel, should be formulated so that the cost for following an arc in the optimal control problem can be calculated.

2. Vehicle Parameters:

   Lower Heating Value

   H_l = 44.6e6 # J/kg

   Fuel Density

   roh_l = 732.2 # Kg/m3

   Air Density

   roh_a = 1.18 # kg/m3

   Engine Inertia

   Je = 0.2 # kgm2

   Engine Maximum Torque

   T_engine_max = 115 # Nm

   Engine Displacment

   V_disp = 1.497e-3 # m3

   Willans approximation of engine efficiency and pressure

   e = 0.4 p_me0 = 0.1e6 # MPa

   Battery charging capacity

   Q_o = 6.5 # Ah

   Open circuit voltage

   Uoc = 300 # V

   Maximum dis-/charging current

   Imax = 200 # A Imin = -200 # A

   Inner resistance

   Ri = 0.65 # ohm

   Efficiency of electrical machine

   n_electricmachine = 0.9

   Gravity

   g = 9.81

   Drag coefficient

   cD = 0.32

   Rolling resistance coefficient

   cR = 0.015

   Frontal area

   Af = 2.31 # m2

   Vehicle mass

   mv = 1500 # kg

   Wheel radius

   rw = 0.3 # m

   Inertia of the wheels

   Jw = 0.6 # kgm2 mwheel = Jw / (rw ** 2)

   Efficiency of Transmission

   eta_gearbox = 0.98

   Electric machine Maximum Torque

   T_em_max = 400 # Nm

   Power of Electric Machine

   P_em_max = 50 # kW

   Electric motor weight

   m_em = 1.5 # kg/Kw

   Maximum powertrain power

   P_pt_max = 90.8 # kW