PC-Based Validation of ECU Software
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1 PC-Based Validation of ECU Software Sean Wyatt - ETAS, Inc. Embedded System Workshop Venue: Oakland University School of Engineering and Computer Science, Rochester, MI Date: October 13, 2012
2 What you will learn Motivation for PC-Based Development How to create MiL and SiL platforms using ETAS INTECRIO software; How to calibrate C-code using production tools like ETAS INCA; How to improve productivity, reduce cost by leveraging the PC platform; 2
3 Agenda Why PC-based Development Definitions What is INTECRIO? Model-in-the-loop with INTECRIO Software-in-the-loop with INTECRIO Other ETAS Solutions Summary 3
4 Agenda Why PC-based Development Definitions What is INTECRIO? Model-in-the-loop with INTECRIO Software-in-the-loop with INTECRIO Other ETAS Solutions Summary 4
5 Why PC-Based Development? Engine Management Transmission Management Effort Number of calibrations Vehicle Motion Management Battery Management Consumption and emission requirements Brake Management Increased inter domain connectivity SW- Component 1 AUTOSAR Interface SW- Component 2 AUTOSAR Interface SW- Component 3 AUTOSAR Interface AUTOSAR-RTE Basic Software Module (BSM) Microcontroller Abstraction 100% ECU Hardware New layered standard architecture 0% Engine control complexity 2010 New functions and variants 5
6 Effort Why PC-Based Development? Simulation Benches Today 70% Vehicles % % % Today 25% Today 5% 6
7 Why PC-Based Development? Road to lab to math is basically the idea that you want to be as advanced on the evolutionary scale of engineering as possible. Math is the next logical step in the process over testing on the road and in the lab. Math is much more cost effective because you don t have to build preproduction vehicles and then waste them. We ve got to get out in front of the technology so it doesn t leave us behind. We have to live and breathe math. When we do that, we can pass the savings on to the consumer. - A senior auto executive Summary: Development hardware (ECUs, vehicles etc.) is expensive and PCs are more powerful and inexpensive than ever.
8 Why PC-Based Development? Automotive industry is already leveraging PCbased development for a range of activities, e.g.: software functional testing and V&V legacy c-code simulation on the PC target-like timing analysis (RTOS) calibration development system development using plant models complete ECU hardware emulation But more can be done.
9 9 Several studies..
10 Agenda Why PC-based Validation Definitions What is INTECRIO? Model-in-the-loop with INTECRIO Software-in-the-loop with INTECRIO Other ETAS Solutions Summary 10
11 Definitions Our Definition: A virtual ECU development environment is characterized by the absence of physical hardware, i.e. PC-based representation of all components, with or without real-time execution 11
12 Evolution of Virtualization ECU Application Models, Software Driver, Vehicle and Environment Models 4 Virtual Environment 3 Real ECU 2 Real Vehicle 1 Real Environment 12
13 What s included for today? Included: ECU algorithm models or embedded code ECU real-time operating system (RTOS) and other basic software components Physical systems (e.g. engine, transmission, body, chassis, driver, environment models) Not included: Virtualization of the ECU hardware (e.g. microcontroller, peripherals) Virtualization of the physical buses (e.g. CAN, FlexRay) 13
14 Steps to Create a Virtual Environment The main ingredients Physical Models or stimuli ECU Algorithm Models ECU Embedded Code Integration and Build Environment The glue and tools necessary Execution Platform Instrumentation Verification and Validation The development tasks you are interested in 14 Calibration and Measurement Automatic Testing
15 Model-in-the-Loop (MiL) Simulation Defined as the ECU algorithm model in-the-loop with the plant models May be run within the modeling environment, or Physical Models or stimuli ECU Algorithm Models Integration Connect models and Build in Simulink Environment Run Execution in Simulink Platform under Windows 15
16 Model-in-the-Loop (MiL) Simulation Defined as the ECU algorithm model in-the-loop with the plant models May be run within the modeling environment, or Run as an executable under Windows - from model-generated code Physical Models or stimuli code gen ECU Algorithm Models code gen Integrate model-code and compile Execution Platform Run executable under Windows 16
17 Software-in-the-Loop (SiL) Simulation Defined as the ECU embedded software in-the-loop with the plant models May be run within the modeling environment, or Physical Models or stimuli ECU Embedded C-Code S-functions Connect models and S-functions (containing code DLLs) in Simulink Integration and Build Environment Run Execution in Simulink Platform under Windows 17
18 Software-in-the-Loop (SiL) Simulation Defined as the ECU embedded software in-the-loop with the plant models May be run within the modeling environment, or Run as an executable under Windows Physical Models or stimuli code gen ECU Algorithm Models code gen ECU Embedded C-Code Integrate model-code with ECU code Integration and Build Environment and compile Run Execution in executable Simulink Platform under Windows 18
19 Agenda Why PC-based Validation Definitions What is INTECRIO? Model-in-the-loop with INTECRIO Software-in-the-loop with INTECRIO Other ETAS Solutions Summary 19
20 Virtual Setup for ECU Development Environment (Road, Wind, etc.) Vehicle Driver Subsystem (e.g. Engine) Subsystem (e.g. Transmission) Subsystem (e.g. Chassis) Set-Point (Sensor) Sensor Actuator Sensor Actuator Sensor Actuator Vehicle Network (e.g. CAN) 20
21 Virtual Setup for ECU Development Environment (Road, Wind, etc.) Vehicle Driver Subsystem (e.g. Engine) Subsystem (e.g. Transmission) Subsystem (e.g. Chassis) Set-Point (Sensor) Virtual Sensor/Actuator Signal Bus Vehicle Network (e.g. CAN) 21
22 Virtual Setup for ECU Development Environment (Road, Wind, etc.) Driver Set-Point (Sensor) Vehicle Subsystem Models (e.g. Engine, Transmission, Chassis) Virtual Sensor/Actuator Signal Bus Vehicle Network (e.g. CAN) 22
23 Virtual Setup for ECU Development Environment (Road, Wind, etc.) Driver Set-Point (Sensor) Vehicle Subsystem Models (e.g. Engine, Transmission, Chassis) Virtual Sensor/Actuator and Network Signal Bus m2 m4 m6 m1 m3 m5 m7 function1 function 2 function 3 23
24
25
26 What is INTECRIO? Virtual Sensor/Actuator and Network Signal Bus 26
27 What is INTECRIO? Plant Models Driver,Vehicle,Environment Application Software Design and Specification Simulink Simulink ASCET C-code obj, lib, dll code gen code gen INTECRIO RTA-OSEK for PC Target HEX and A2L files 27
28 Key Takeaways PC-based development of ECU software is becoming more widespread due to cost and performance advantages INTECRIO is a versatile platform for PCbased verification and validation (e.g. in MiL and SiL phases) 28
29 Agenda Why PC-based Validation Definitions What is INTECRIO? Model-in-the-loop with INTECRIO Software-in-the-loop with INTECRIO Other ETAS Solutions Summary 29
30 INTECRIO for MiL Simulink Simulink R2007a Embedded Coder R2011a Simulink Coder Hex and A2L Virtual Prototyping 30
31 31 INTECRIO for MiL
32 INTECRIO for MiL: Demo Setup Goal: Simulate a Simulink-based plant (throttle) + Simulink throttle controller specification. THR_Cor Actual Position Desired Position Simulink Algorithm Throttle Plant Model 32
33 Agenda Why PC-based Validation Definitions What is INTECRIO? Model-in-the-loop with INTECRIO Software-in-the-loop with INTECRIO Other ETAS Solutions Summary 33
34 INTECRIO for SiL 2 steps Simulink Models Software Component INTECRIO HEX and A2L files 34
35 INTECRIO for SiL Step 1 with INCODIO Measure C-code Create Interface Calibrate Schedule 35
36 36 INTECRIO for SiL
37 INTECRIO for MiL + SiL: Demo Setup Goal: Verify that the C-code implementation of the Throttle Controller matches specification, reusing the stimulus and plant Simulink models. THR_Cor Actual Position Desired Position C-Code Algorithm Throttle Plant Model 37
38 38 Calibration of C-code with INCA
39 Key Takeaways MiL: INTECRIO integrates one or more Simulink models at the code level, adds scheduling information and compiles for PC target. SiL: INCODIO parses C-code and makes it visible to INTECRIO for integration with models or other C-code. INTECRIO adds scheduling information and compiles for PC target. 39 Calibration: An industry standard tool like INCA can be used to pre-calibrate ECU software in the SiL environment
40 Agenda Why PC-based Validation Definitions What is INTECRIO? Model-in-the-loop with INTECRIO Software-in-the-loop with INTECRIO Other ETAS Solutions Summary 40
41 INCA with INCA-SIP Algorithm Engineer Simulink INCA Control & Plant Models Legacy C-code.dll INCA-SIP API XCP on Ethernet Windows 41
42 INCA with INCA-VLINK Calibration Engineer Simulink INCA Control & Plant Models Legacy C-code.dll INCA-EIP INCA-VLINK compile TCP/IP on Ethernet Windows 42
43 ISLOAR-EVE* (ETAS Virtual ECU) INCA Authoring Virtual Instruments Windows Ethernet *Product not yet released 43
44 Agenda Why PC-based Validation Definitions What is INTECRIO? Model-in-the-loop with INTECRIO Software-in-the-loop with INTECRIO Other ETAS Solutions Summary 44
45 Summary Virtual techniques can substantially lower the cost of verification and validation of ECU control models and software. Calibrators can use the same tools in the virtual environment as in the vehicle. Re-use of test cases, models and calibration data across the development cycle further optimizes cost and effort. AUTOSAR architecture further enables validation of ECU software on the PC platform 45
46 Where to find more information? 1. Virtualization in Automotive Embedded Systems 2. Automotive: The Next Frontier for Virtualization 3. Virtualization Technologies for Cars 4. Road-to-lab-to-math: a new path to improved product 5. SAE papers: : Maximizing Test Asset Re-use across MiL, SiL and HiL Development Platforms : Advanced Techniques for Simulating ECU C-code on the PC : Model-Based Verification and Validation of Electronic Engine Control 46
47 Skills and Networking Opportunities 1. Skills required to leverage PC-based development: - Controls development (e.g. MATLAB/Simulink ) - Software development (e.g. ASCET, C-code) - Plant modeling (i.e. physical systems) - Verification and validation (i.e. testing of embedded software) - Understanding of AUTOSAR architecture 2. Networking opportunities: - Testing Expo (Novi): Oct 23-25, SAE World Congress (Detroit): April 16-18,
48 Thank you! 감사합니다. 谢谢 有難うございました Vielen Dank Merci 48
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