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1www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.Copyright © ESI Group, 2019. All rights reserved.
www.esi-group.com
A Real-Time Interface for Xcos
Demonstrated on a battery management system
Sven Jacobitz, Ostfalia University of Applied Sciences
Scilab Conference 2019
2www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Agenda
• Introduction
• Requirements to the RTI
• Concept of the RTI
• Realization of the RTI
• Verification and application
• Kalman Filter design for SoC estimation
• Verification by online simulation
• Summary and outlook
3www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Project LoCoRCP
Introduction
04/2014 – 09/2014 Feasibility study towards a Low-Cost RCP system with open-source platform for
developing battery management systems
01/2017 – 12/2019 Low-Cost Rapid Control Prototyping system with open source platform for
functional development of embedded mechatronic systems (LoCoRCP)
4www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Concept of the Low-Cost RCP Platform (LoRra)
Introduction
5www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Requirements to the RTI
• Basic-blocks for controlling the hardware interfaces
• Automated programming of the target hardware
• Generation of efficient C-code
• Generation and configuration of the real-time application
• Compiling, Linking, …
• Programming the hardware
• Modular structure
• Flexibility
• Extensibility
6www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Overall concept
Concept of the RTI
• Generating code fragments from the model
• Linking fragments, code templates and basic software
• Call the compiler and linker
• Programm the target hardware
7www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Software structure of the real-time application
Concept of the RTI
Reference: CMSIS – Arm Developer
8www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Realization of the RTI
• Written in Scilab Language
• Controlling hardware peripherals using basic blocks
• Basic blocs as sci function:
[code_fragments] = foo(blkID, topology_struct)
• Fist implementation: STM32F7
• Basis software generated by STM32CubeMX
• Using FreeRTOS as operating system
9www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
BMS test bench for verification
10www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Kalman Filter design for SoC estimation – modelling the battery
Verification and application
Equivalent circuit model
Validation of the battery model using the DST power cycle
11www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Kalman Filter design for SoC estimation – functional design
Verification and application
Discrete EKF with continuous system model
12www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Kalman Filter design for SoC estimation – MiL-Simulation
Verification and application
Validation of the EKF using the MiL simulation
0 0.2 0.4
80
85
90
95
100
105
SoCin%
Time in s
13www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Composition of the online simulation
Verification and application
14www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Verification by online simulation
Verification and application
15www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Summary and outlook
Summary
• LoRra approach for continuously model based design
• Real-Time Interface between Xcos model an real-time application
• Comfortable linking hardware interfaces to the model
• Automated implementation of generated code
• Extendable functionality and flexible target hardware
• Verification by means of a BMS Function
Outlook
• Graphical user interface for measurement and calibration
• LoRra Scilab Toolbox in Atoms
16www.esi-group.com
Copyright © ESI Group, 2019. All rights reserved.
Thank you

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A Real-Time Interface for Xcos – an illustrative demonstration using a battery management system

  • 1. 1www.esi-group.com Copyright © ESI Group, 2019. All rights reserved.Copyright © ESI Group, 2019. All rights reserved. www.esi-group.com A Real-Time Interface for Xcos Demonstrated on a battery management system Sven Jacobitz, Ostfalia University of Applied Sciences Scilab Conference 2019
  • 2. 2www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Agenda • Introduction • Requirements to the RTI • Concept of the RTI • Realization of the RTI • Verification and application • Kalman Filter design for SoC estimation • Verification by online simulation • Summary and outlook
  • 3. 3www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Project LoCoRCP Introduction 04/2014 – 09/2014 Feasibility study towards a Low-Cost RCP system with open-source platform for developing battery management systems 01/2017 – 12/2019 Low-Cost Rapid Control Prototyping system with open source platform for functional development of embedded mechatronic systems (LoCoRCP)
  • 4. 4www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Concept of the Low-Cost RCP Platform (LoRra) Introduction
  • 5. 5www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Requirements to the RTI • Basic-blocks for controlling the hardware interfaces • Automated programming of the target hardware • Generation of efficient C-code • Generation and configuration of the real-time application • Compiling, Linking, … • Programming the hardware • Modular structure • Flexibility • Extensibility
  • 6. 6www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Overall concept Concept of the RTI • Generating code fragments from the model • Linking fragments, code templates and basic software • Call the compiler and linker • Programm the target hardware
  • 7. 7www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Software structure of the real-time application Concept of the RTI Reference: CMSIS – Arm Developer
  • 8. 8www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Realization of the RTI • Written in Scilab Language • Controlling hardware peripherals using basic blocks • Basic blocs as sci function: [code_fragments] = foo(blkID, topology_struct) • Fist implementation: STM32F7 • Basis software generated by STM32CubeMX • Using FreeRTOS as operating system
  • 9. 9www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. BMS test bench for verification
  • 10. 10www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Kalman Filter design for SoC estimation – modelling the battery Verification and application Equivalent circuit model Validation of the battery model using the DST power cycle
  • 11. 11www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Kalman Filter design for SoC estimation – functional design Verification and application Discrete EKF with continuous system model
  • 12. 12www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Kalman Filter design for SoC estimation – MiL-Simulation Verification and application Validation of the EKF using the MiL simulation 0 0.2 0.4 80 85 90 95 100 105 SoCin% Time in s
  • 13. 13www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Composition of the online simulation Verification and application
  • 14. 14www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Verification by online simulation Verification and application
  • 15. 15www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Summary and outlook Summary • LoRra approach for continuously model based design • Real-Time Interface between Xcos model an real-time application • Comfortable linking hardware interfaces to the model • Automated implementation of generated code • Extendable functionality and flexible target hardware • Verification by means of a BMS Function Outlook • Graphical user interface for measurement and calibration • LoRra Scilab Toolbox in Atoms
  • 16. 16www.esi-group.com Copyright © ESI Group, 2019. All rights reserved. Thank you

Editor's Notes

  1. Codebausteine Embedded code transformer Rest (Compiler, linker, programmer)