Difference between revisions of "E-trailer"

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(→‎Creating the simulation)
(→‎ECU)
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* Fourth, insert the ECU module to the '''ECU''' subsytem and notice that there is an extra port next to the from tag, double click the sub_connector and change the number of inputs into 1 to delete this extra port. The ECU module and its parameter file can be downloaded (insert ECU module and its parameter) <br/>
 
* Fourth, insert the ECU module to the '''ECU''' subsytem and notice that there is an extra port next to the from tag, double click the sub_connector and change the number of inputs into 1 to delete this extra port. The ECU module and its parameter file can be downloaded (insert ECU module and its parameter) <br/>
  
−
The input signals to the ECU modules are:
+
(insert ECU subsystem screenshot)
−
{| class="wikitable"
 
−
|-
 
−
! Scope="col"| Subsystem
 
−
! Scope="col"| Input signal
 
−
! Scope="col"| Signal label
 
−
! Scope="col"| Retrieved from
 
−
|-
 
−
| rowspan="5" style="text-align: center;" | Driver
 
−
| Accelerator pedal position
 
−
| ''Drv_AccPedl_Rt''
 
−
| rowspan="5" style="text-align: center;" | Driver manual module sensor
 
−
|-
 
−
| Brake pedal position
 
−
| ''Drv_BrkPedl_Rt''
 
−
|-
 
−
| Drive cycle reference speed
 
−
| ''Drivecycle_RefSpeed_mps''
 
−
|-
 
−
| Clutch pedal position
 
−
| ''Drv_CluPedl_Rt''
 
−
|-
 
−
| Requested gear number
 
−
| ''Drv_nrGearReq''
 
−
|-
 
−
| rowspan="22" style="text-align: center;" | Plant model
 
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| Actual engine speed
 
−
| ''Eng_nAct_radps''
 
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| rowspan="4" style="text-align: center;" | Engine module sensor
 
−
|-
 
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| Crankshaft torque
 
−
| ''Eng_tqCrkSftAct_Nm''
 
−
|-
 
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| Indicated torque
 
−
| ''Eng_tqindAct_Nm''
 
−
|-
 
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| Engine oil temperature
 
−
| ''Eng_tOilAct_K''
 
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|-
 
−
| Battery output current
 
−
| ''Batt_iAct_A''
 
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| rowspan="4" style="text-align: center;" | Battery module sensor
 
−
|-
 
−
| Battery output voltage
 
−
| ''Batt_uAct_V''
 
−
|-
 
−
| State of charge
 
−
| ''Batt_socAct_Rt''
 
−
|-
 
−
| Battery temperature
 
−
| ''Batt_tAct_K''
 
−
|-
 
−
| Clutch disengaged or not
 
−
| ''Clu_flgConnected_B''
 
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| rowspan="1" style="text-align: center;" | Clutch module sensor
 
−
|-
 
−
| Electric machine output torque
 
−
| ''ElecMac_tqAct_Nm''
 
−
| rowspan="4" style="text-align: center;" | Electric machine module sensor
 
−
|-
 
−
| Electric machine output speed
 
−
| ''ElecMac_nAct_radps''
 
−
|-
 
−
| Electric machine output current
 
−
| ''ElecMac_iAct_A''
 
−
|-
 
−
| Electric machine output temperature
 
−
| ''ElecMac_tAct_K''
 
−
|-
 
−
| Transmission output speed
 
−
| ''Transm_nOutAct_radps''
 
−
| rowspan="4" style="text-align: center;" | Transmission module sensor
 
−
|-
 
−
| Transmission gear number
 
−
| ''Transm_nrGearAct''
 
−
|-
 
−
| Clutch lock
 
−
| ''Transm_flgConnected_B''
 
−
|-
 
−
| Transmission input speed
 
−
| ''Transm_nInAct_radps''
 
−
|-
 
−
| Vehicle velocity
 
−
| ''Chassis_vVehAct_mps''
 
−
| rowspan="4" style="text-align: center;" | Chassis module sensor
 
−
|-
 
−
| Wheel speed
 
−
| ''Chassis_nWheelAct_radps''
 
−
|-
 
−
| Vehicle mass
 
−
| ''Chassis_massVehAct_kg''
 
−
|-
 
−
| Road slope
 
−
| ''Chassis_slopeRoad_rad''
 
−
|-
 
−
| Auxiliary system output current
 
−
| ''Aux_iAct_A''
 
−
| rowspan="1" style="text-align: center;" | Electrical auxiliary module sensor
 
−
|}
 
  
 
=== Plant model ===
 
=== Plant model ===

Revision as of 06:31, 1 June 2018

This page provides the steps on how to model e-trailer project from e-Traction. The e-trailer project is a concept project from e-Traction in which e-trailer is a normal trailer that has an electric motor mounted to one of its axle.
The ultimate goal of this project is to increase energy efficiency [kWh/km], which leads to reducing operating cost.

Creating the model

The model is split into four different areas. Those are:

  • Test scenario (Driving cycle)
  • ECU
  • Plant model (Parallel Hybrid vehicle powertrain component)
  • Driver (Vehicle driver model)

Test scenario

  • Insert the Test_scenario component to (ADVANCE) workspace, this component can be found under the Test Scenario in SIMarchitect Library.

ECU

A simple control algorithm has been developed and implemented into the e - trailer model in order to control the energy distribution between the Internal Combustion Engine and the Electric Machine. The control algorithm used the accelerator and brake pedal position to determine the demanded torque by the vehicle so that it can follow the desired driving cycle. The amount of throttle and brake required was calculated by the driver model. The required gear number for a certain moment was calculated by the gear shift logic that located inside the driver model. The electric machine is used together with the I.C.E. to achieve the demanded torque when the ECU determined that the demanded torque is above the maximum capability of what the engine can supply. If the state of charge of the battery is lower than the minimum charge value, the electric machine will be used as a generator to charge the battery during braking motion. The electric machine is also used to brake the vehicle when possible, however, mechanical brakes will be used when the braking torque from the electric machine is not sufficient.


To create the ECU subsystem:

  • First insert an empty_area component to (ADVANCE) workspace, this component can be found under the modeling tools below TNO ADVANCE general library
  • Second, rename this empty_area componenent into ECU.
  • Third, delete the in and out ports inside the ECU subsystem as it is shown in the figure below.


empty_area


  • Fourth, insert the ECU module to the ECU subsytem and notice that there is an extra port next to the from tag, double click the sub_connector and change the number of inputs into 1 to delete this extra port. The ECU module and its parameter file can be downloaded (insert ECU module and its parameter)

(insert ECU subsystem screenshot)

Plant model

The plant model for e-trailer project is split up into two group, those are the truck and the trailer.

e-trailer plant model.


The components used for the e - trailer project are:

  • Internal Combustion Engine
  • Clutch
  • Mechanical connection
  • Transmission
  • Final gear
  • Chassis
  • Battery
  • Electric machine
  • Electrical auxiliary system

The vehicle topology for e-trailer is similar to the Parallel Hybrid vehicle example. However, the electric motor in e-trailer is connected to the trailer wheel while the Parallel Hybrid vehicle connects the electric motor to the mechanical gear which connects both engine and electric motor together.

(insert vehicle e-trailer vehicle topology)

Subsystems

After all of the components are inserted to ADVANCE workspace, create three different subsystems which will calculate:

  • Battery current input = summation of current from Electric machine module and Electrical auxiliary system module
  • Total vehicle torque = summation of torque from Final gear module and Electric machine module
  • Total vehicle inertia = summation of inertia from Final gear module and Electric machine module

Do not forget to connect each of the subsystems to the main_connector using the goto and from tag as it is shown on the right side of the plant model area.
Double click the main_connector and add 3 extra inputs to accomodate the extra tag from the newly created subsystems.

The input signals for truck component modules are:

Module Input signal Signal label Retrieved from
Internal combustion engine Requested engine speed Eng_nReq_radps ECU module cmd
Switch Speed / torque control Eng_flgReqSwitch_B
Requested engine torque Eng_tqReq_Nm
Exhaust brake ON / OFF Eng_flgExhaustBrake_B
Engine ON / OFF Eng_flgonoff_B
Starter motor ON / OFF Eng_strtReq_B
Fuel cut off Eng_flgFuelCut_B
Engine rotational speed phys_speed_radps Clutch module mechanical fb output
Clutch Requested clutch pedal position Clu_ratReq_B ECU module cmd
Clutch torque input phys_torque_Nm ICE module mechanical output
Clutch inertia input phys_inertia_kgm2
Clutch rotational speed input phys_speed_radps Transmission module mechanical fb output
Transmission Requested gear number Transm_nrGearReq ECU cmd
Transmission torque input phys_torque_Nm Clutch module mechanical output
Transmission inertia input phys_inertia_kgm2
Transmission rotational speed input phys_speed_radps Final gear module mechanical fb output
Final gear Final gear torque input phys_torque_Nm Transmission module mechanical output
Final gear inertia input phys_inertia_kgm2
Final gear rotational speed input phys_speed_radps Chassis module mechanical fb output
Chassis Requested chassis brake torque Chassis_tqBrake_Nm ECU module cmd
Chassis torque input phys_torque_Nm Plant model total vehicle torque
Chassis inertia input phys_inertia_kgm2 Plant model total vehicle inertia
Drivecycle slope Chassis_slopeRoad_rad Test scenario area

The input signals for trailer component modules are:

Module Input signal Signal label Retrieved from
Battery Battery current input battery Plant model battery current input
Battery Actual cooling flow Batt_flowActCooling_kgps ECU module cmd
Electric machine Requested electric machine speed ElecMac_nReq_radps ECU module cmd
Switch speed / torque control ElecMac_flgReqSwitch_B
Requested electric machine torque ElecMac_tqReq_Nm
Electric machine actual cooling flow ElecMac_flowActCooling_kgps
Electric machine voltage input phys_voltage_V Battery module electrical output
Electric machine rotational speed input phys_speed_radps Chassis module sensor
Electrical auxiliary system Requested power Aux_pwrElecReq_W ECU module cmd
Voltage input phys_voltage_V Battery module electrical output

Driver

The e-trailer project use manual transmission, therefore the driver manual module will be used as the driver model.

The input signals for the driver module are:

Subsystem Input signal Signal label Retrieved from
Plant model Actual vehicle velocity Chassis_vVehAct_mps Chassis module sensor
Transmission input speed Transm_nInAct_radps Transmission module sensor
Transmission actual gear number Transm_nrGearAct
Clutch disengaged or not Clu_flgConnected_B Clutch module sensor
Driver Accelerator pedal rate Drv_AccPedl_Rt Driver manual module
Drive cycle Drive cycle time and speed drivecycle_time_speed Test scenario area

Simulation settings

The simulation settings for e-trailer project:

Settings Value
Time 1800 [s]
Fixed - step size 0.01
Solver type ode3 (Bogacki - shampine)

The sequence of running the simulation:

  • First, run parameter_main m.file
  • Second, choose the desired output results in the Output Selector block
  • Third, run the simulation
  • Fourth, plot the results using Results Plot GUI block

Contact

For more information regarding the specification of the battery and electric motor please contact e-Traction
(insert contact person information)

Simulation result

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