findChildSys

Powertrain subsystem energy analysis

Description

example

The findChildSys(PlantInfoObj,SubSystem) method finds and returns an autoblks.pwr.PlantInfo object for the subsystem. Use the autoblks.pwr.PlantInfo object to evaluate and report power an energy for component-level blocks and system-level reference applications.

After you use the run method to analyze the powertrain power and energy, use the findChildSys method to evaluate specific subsystems.

Examples

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Analyze the power and energy in the conventional vehicle reference application. To use the findChildSys method to analyze the engine and drivetrain subsystems, see step 6 and step 7.

  1. Open the conventional vehicle reference application. By default, the application has a mapped 1.5 L spark-ignition (SI) engine and a dual clutch transmission. Project files open in a writable location.

  2. Set the system name to SiCiPtReferenceApplication.

    Create the autoblks.pwr.PlantInfo object.

    Use the PwrUnits and EnrgyUnits properties to specify the units.

    SysName = 'SiCiPtReferenceApplication';
    VehPwrAnalysis = autoblks.pwr.PlantInfo(SysName);
    VehPwrAnalysis.PwrUnits = 'kW';
    VehPwrAnalysis.EnrgyUnits = 'MJ';
  3. Use the run method to turn on logging, run simulation, and add logged data to the object.

    run(VehPwrAnalysis);
  4. Use the dispSysSummary method to display the results.

    dispSysSummary(VehPwrAnalysis);
  5. Use the xlsSysSummary method to write the results to a spreadsheet.

    xlsSysSummary(VehPwrAnalysis,'EnergySummary.xlsx');
  6. Use the findChildSys method to retrieve the autoblks.pwr.PlantInfo object for the Engine subsystem.

    To display the results, use the dispSignalSummary method.

    Use the histogramEff method to display a histogram of the time spent at each engine plant efficiency.

    EngSysName = 'SiCiPtReferenceApplication/Passenger Car/Engine';
    EngPwrAnalysis = findChildSys(VehPwrAnalysis,EngSysName);
    dispSignalSummary(EngPwrAnalysis);
    histogramEff(EngPwrAnalysis);
  7. Use the findChildSys method to retrieve the autoblks.pwr.PlantInfo object for the Drivetrain subsystem.

    To display the results, use the dispSignalSummary method.

    DrvtrnSysName = 'SiCiPtReferenceApplication/Passenger Car/Drivetrain';
    DrvtrnPwrAnalysis = findChildSys(VehPwrAnalysis,DrvtrnSysName);
    dispSignalSummary(DrvtrnPwrAnalysis);
  8. To plot the results, use the sdiSummary method.

    sdiSummary(VehPwrAnalysis,{EngSysName,DrvtrnSysName})

Input Arguments

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autoblks.pwr.PlantInfo object for the system that you want to analyze.

Subsystem that you want to analyze.

Example: 'SiCiPtReferenceApplication/Passenger Car/Engine'

Example: 'SiCiPtReferenceApplication/Passenger Car/Drivetrain'

Data Types: char

Introduced in R2019a