Development of Vehicle Characteristics Using MSC.ADAMS Simulation Including Chassis Controllers

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1 Development of Vehicle Characteristics Using MSC.ADAMS Simulation Including Chassis Controllers Dr.-Ing. Harald Wilhelm, Simulation Handling & Ride Audi AG Thomas Kriegel, Audi AG, Head Simulation Handling & Ride

2 Vehicle Characteristics Vehicle Performance regarding cornering ( Steady-State Cornering ) steering ( Step Steer ) braking ( Step Brake Pressure ) accelerating ( Accelerating in Turn ) Handling Vehicle Performance regarding washboard freeway ( Sine Road ) cleats on freeway ( Cleat ) bad country roads ( Uneven Road ) badly balanced wheels ( Unbalance ) Ride Vehicle Performance regarding misuse ( Pot Hole ) extreme situations ( Braking on Belgian Block Track ) durability ( Intensive Test Course ) Strength

3 Allowed Use of Simulation Environments Handling Ride Strength Real Time Vehicle-Spline-Model + Controller-Hardware (HiL, On-Line) ve-dyna X Detailed Vehicle-Multi-Body- Model + Controller-Software (SiL, Off-Line) MSC.ADAMS X X X

4 Automation of Handling Analysis (MSC.ADAMS/Car)

5 Automation of Ride Analysis (MSC.ADAMS/Car)

6 Handling Evaluation Driving Maneuver Simulated Time Signals Objective Parameters / Handling Profile Continous Validation Handling - Road Test / Measurement Weighting Functions Full-Vehicle Simulation Subjective Evaluation in Road Test Project Work Continuous Validation Querbeschl.Verzögerung Querbeschl_Verst_Abfall LW-Gradient SW-Gradient Simulated handling values correlating to subjective evaluation T_prt_1 Gierüberhöhung TB_Wert_1 Phasenverzugsfrequenz Gierdämpfung äquiv_gierverstärkung

7 Ride Evaluation Time and Frequency Domain Ride Values (based on Literature)

8 Strength Analysis Intensive Test Course (MSC.ADAMS/Car) Component Forces to Fatigue Simulation Wheel Forces to real Test Rig

9 Chassis Control Systems Audi Dynamic Steering? Semi-active Damper Airspring?? ESP (incl. further Functions)? Interaction must be represented in Simulation

10 Integration of Control Algorithm in Full- Vehicle Simulation On-Line (Real Time) Off-Line MATLAB /Simulink ve-dyna - Vehicle HiL Hardware-Controller Algorithm Base Software MATLAB /Simulink ve-dyna -Vehicle Algorithm MATLAB /Simulink MATLAB /Simulink Algorithm ve-dyna - Vehicle Algorithm 2 HiL Hardware-Controller Algorithm 1 Base Software MSC.ADAMS MSC.ADAMS-Vehicle (MSC.ADAMS/Controls) MSC.ADAMS-Vehicle Algorithm as C-Code (MATLAB /Simulink )

11 Production Code in Projects (MSC.ADAMS/Controls) OEM Vehicle Model Supplier Model

12 Best Code Generation Process with respect to Simulation MATLAB /Simulink Algorithm Auto Code C-Code Hardware-Controller Algorithm Base Software Off-Line Simulation Road Test HiL

13 Product Development Process Vehicle Design Handling & Ride MSC.ADAMS Vehicle Robustness Handling & Ride Prototype Algorithm Component Design Algorithm Design ve-dyna / MATLAB MATLAB Component Testing Algorithm Testing Production Code Concept Production

14 Example Semi-Active Damper System Supplier Algorithm (Matlab /Simulink ) Check Algorithm with simplified Vertical Model (Matlab /Simulink ) Z X Damper Test Rig (MSC.ADAMS/Ride) Y Pre-Application of Algorithm (MSC.ADAMS) Handling & Ride Analysis (MSC.ADAMS) Road Test

15 Semi-Active Damper in MSC.ADAMS/Car (Audi A6)

16 Summary Simulation environments used by Audi AG regarding handling, ride and strength Importance and necessity of modelling chassis control systems Possibilities of control system integration for full-vehicle simulation Product Development Process: Defining vehicle characteristics using simulation including control algorithms

17 Contact Details EMEA Development of Vehicle Characteristics Using MSC.ADAMS Simulation Including Chassis Controllers Dr.-Ing. Harald Wilhelm Audi AG / EF-13 Simulation Handling & Ride harald.wilhelm@audi.de

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