The Application of Human Body Models in SIMPACK Dr. Valentin Keppler, Biomotion Solutions www.biomotion-solutions.com keppler@biomotion-solutions.com 4/15/2011 SIMPACK Usermeeting 2011 1
The Human Factor Knowledge about the biomechanical interaction between technical product and human is an important key factor in virtual engineering. Applications may be: Driver models (motorcycle, car) Occupant safety (whiplash) Ride comfort Medical (implants) Sports & recreation (golf, tennis) 4/15/2011 SIMPACK Usermeeting 2011 2
Biomotion Elements To create a virtual human you need at least: About 17 bodies (mass, inertia, marker) Model for wobbling masses Joint torque models (to keep posture or perform motions) Interaction with environment (seat contact model, grip force model) with stable friction handling Spinal disc model Muscle & tendon All these Elements are available with the Biomotion Elements add-on! 4/15/2011 SIMPACK Usermeeting 2011 3
Biomotion Elements - Examples Wobbling Mass Model suitable for analysis of vibration exposure or impact induced injuries Spinal Disc Element designed for analysis of whole body vibration or whiplash 4/15/2011 SIMPACK Usermeeting 2011 4
Ways to model the Human Body 1. Use the model wizard varibody from Biomotion Workbench easy, can be done without special know how 2. Build it from scratch time consuming task, needs special know how 4/15/2011 SIMPACK Usermeeting 2011 5
Biomotion Workbench 4/15/2011 SIMPACK Usermeeting 2011 6
Human Body Model in SIMPACK 4/15/2011 SIMPACK Usermeeting 2011 7
When passive Motion is not enough Sometimes an active model is needed: Handling of power tools Steering a motorcycle Performing special motions (e.g. sports) Can be done: Using specific controllers using Co-Simulation or user defined control element Some motion controllers are available as add-on: Motorcycle Rider Hand-Arm-System Controller for use with power tools 4/15/2011 SIMPACK Usermeeting 2011 8
Workflow Example: MC-Rider Generate human body model Open your MC-Model Load human body as substructure Place position & pose Add coupling (e.g. rider-seat or hand-grip for handlebars) Wire the controller loop Calibrate (to account for specific geometric properties of your motorcycle-rider system) Perform simulations 4/15/2011 SIMPACK Usermeeting 2011 9
Prepare the Motorcycle-Model Add the marker for hand, feet and seat contact 4/15/2011 SIMPACK Usermeeting 2011 10
Load Human Body Model 4/15/2011 SIMPACK Usermeeting 2011 11
Set up Control Loop Joint State Model: Calculate riders arm movement based on tracksensor from SIMPACK- Automotive. 4/15/2011 SIMPACK Usermeeting 2011 12
Calibration Validation Simulation Validation with measured rider admittance (shaker / mock up) Controller adapts to specific ridermotorcycle kinematics -> Calibration process prior to ride simulation performed 4/15/2011 SIMPACK Usermeeting 2011 13
Simulation 4/15/2011 SIMPACK Usermeeting 2011 14
Riders Influence to Ride Dynamics Stiffness & damping of rider s hands, arms and trunk determines the admittance Goal: optimization of the MC with respect to maximal safety and comfort 4/15/2011 SIMPACK Usermeeting 2011 15
Further Examples Power Tool Minimization of vibration exposure by optimized design (workflow quite similar to MC-Rider) Feed forward golf swing motion (movement given by motion capturing) Car occupant -> ride comfort simulation 4/15/2011 SIMPACK Usermeeting 2011 16
Powertool Simulation 4/15/2011 SIMPACK Usermeeting 2011 17
Golf Swing a better Golf Club 4/15/2011 SIMPACK Usermeeting 2011 18
Occupant Simulation with SIMPACK Automotive 4/15/2011 SIMPACK Usermeeting 2011 19
Thank you for your attention! I m glad to answer any questions. 4/15/2011 SIMPACK Usermeeting 2011 20