Novel Chassis Concept for Omnidirectional Driving Maneuvers

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1 Novel Chassis Concept for Omnidirectional Driving Maneuvers Challenges in modelling suspensions with wheel individual steering system KIT The Research University in the Helmholtz Association

2 Agenda Overview Project OmniSteer Novel Chassis Concept in Project OmniSteer Modeling Novel Chassis Concept Application of the Model Summary 2

3 Agenda Overview Project OmniSteer Novel Chassis Concept in Project OmniSteer Modeling Novel Chassis Concept Application of the Model Summary 3

4 Overview Project OmniSteer Omni prefix stands for orthogonal multi-directional non-linear The target of the OmniSteer project is to develop a mechatronic system for the longitudinal and lateral guidance of a vehicle, which ensures the functional safety. This intention is enabled by the electrification of the power train and the facility to integrate the power units into the wheels. 4

5 Overview Project OmniSteer a) b) c) 5

6 Agenda Overview Project OmniSteer Novel Chassis Concept in Project OmniSteer Modeling Novel Chassis Concept Application of the Model Summary 6

7 Novel Chassis Concept in Project OmniSteer Omnidirectional driving maneuvers Requirements: 4 individually steerable wheels 90 degree in both directions Several concepts known from literature, but not applicable for passenger cars novel concept needed Source: National Aeronautics and Space Administration,

8 Novel Chassis Concept in Project OmniSteer Omnidirectional driving maneuvers Requirements: 4 individually steerable wheels 90 degree in both directions Several concepts known from literature, but not applicable for passenger cars novel concept needed Features of novel Chassis Concept: Steering wishbones Curved wishbones Height offset of wishbones 8

9 Novel Chassis Concept in Project OmniSteer Why do we need a model? Estimating forces and moments within the suspension and steering system to support the mechanical design Gaining the knowledge of vehicle dynamic behavior in omnidirectional driving maneuvers Serving as reference model to test different kinds of control algorithms Challenge in modeling Novel chassis concept was not predefined in the library in the most commercial vehicle dynamics softwares Steering system could no longer be controlled by the steering track rod 9

10 Agenda Overview Project OmniSteer Novel Chassis Concept in Project OmniSteer Modeling Novel Chassis Concept Application of the Model Summary 10

11 Modelling Novel Chassis Concept Vehicle model in CarMaker as foundation CarMaker model Interface Suspension model Modelling Suspension and steering as a Multi-Body model in Matlab/Simscape Toolbox Body Tire Connection CarMaker model and Suspension model through SKC- File and CM4SL-Environment Brake Powertrain Suspension SKC Steering CM4SL 11

12 Modelling Novel Chassis Concept Analysis Multibody model Topology model Implementation in Simscape 12

13 Modelling Novel Chassis Concept Suspension multibody model Suspension kinematics SKC-File Suspension System Steering System CarMaker for Simulink Steering Torque Steering Angle Steer.<Pos>.q 13

14 Force [N] Force [N] Torque [Nm] Force [N] Modelling Novel Chassis Concept Steering Torque Longitudinal Force Driving Maneuver: Parking on the other side of street Lateral Force Vertical Force 14

15 Agenda Overview Project OmniSteer Novel Chassis Concept in Project OmniSteer Modeling Novel Chassis Concept Application of the Model Summary 15

16 Application of the Model CarMaker Virtual Sensors Odometry based localization algorithm Estimated Position Omnidirectional Driving Maneuvers Complex vehicle model Reference Position Simulation environment to test odometry-based localization algorithm 16

17 Application of the Model Comparison of different odometry-based localization algorithms during parking maneuver 17

18 Application of the Model Comparison of different odometry-based localization algorithms during parking maneuver 18

19 Agenda Overview Project OmniSteer Novel Chassis Concept in Project OmniSteer Modeling Novel Chassis Concept Application of the Model Summary 19

20 Summary Novel chassis concept is needed for the omnidirectional driving maneuvers Modeling method of novel chassis concept with help of CarMaker and Simscape was introduced Application this model in development of odometry based localization algorithm 20

21 Thank you for your attention! 21

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