Suspension and Active Safety Verification Jan van Deventer & Peter Jeppsson Luleå University of Technology AstaZero Researchers Day Tuesday, April 14, 2015
Outline • Overview • Issues • or, Window of opportunity • Addressing issues • what we currently are doing
Suspension and Active Safety Verification OVERVIEW
Ice and Snow Tracks http://www.arjeplog.se/toppmeny/film/isens-giganter.html
CASTT operation
Test area Plantskolan
The World’s Elite meet Here RICARDO DAIMLER MAN BOSCH OPEL FIAT FERRARI HALDEX ALFA ROMEO GKN AUDI VOLKSWAGEN MANDO SEAT LAND ROVER SKODA KNORR-BREMSE LANCIA BMW PORSCHE RENAULT EVOBUS PEUGEOT BORG WARNER CITROËN PD&E ZF HYUNDAI MOBIS MAGNA POWERTRAIN MAGNA STEYR AMERICAN AXLE DUNLOP TECH PIRELLI BRIDGESTONE CONTINENTAL TEVES TRW
Active Safety with Base Brakes • Anti-lock Braking System (ABS) • Traction Control (TC) • Electronic Stability Control (ESC)
Suspension and Active Safety Verification ISSUES, OR WINDOW OF OPPORTUNITY
Vehicle Specific Optimization AstaZero IDIADA Nardó
Test Standards • ISO 3888 . Test Track for a sever lane-change manoeuvre. (Double lane-change & Obstacle avoidance) • UN ECE R13H . Uniform provisions concerning the approval of passenger cars with regard to braking • Annex 9 . Electronic stability control systems and brake assist systems
Production vehicles on the road
3.5+ Tons Vans & Cabs
Suspension Modification
European Commission Directives • Europe saw a major step forward in vehicle safety on 1 November 2014 as new safety features became mandatory for each new car, van, truck and bus sold in the EU, by virtue of application of the General Safety Regulation (EC) No 661/2009 . • Electronic Stability Control (ESC) must be fitted as standard equipment on practically all new cars, vans, trucks and busses. http://ec.europa.eu/enterprise/sectors/automotive/safety/index_en.htm
Some Issues • Business aspect • Who tests modified vehicles that we meet on the road? • What needs to be tested? • Where can one test modified vehicles? • Research aspect • Driving robot for ice and snow covered roads, as well as test standards . • Service System Integration : Suspension cooperating with ESC for modified vehicles.
Suspension and Active Safety Verification ADDRESSING ISSUES: WHAT WE CURRENTLY ARE DOING
Testing @ AstaZero
Training Future Engineers
Robot on a Handling Snow Track
Lane Change on Ice tracks ESC on 10 Reference tire 9 8 7 Non studded tire 6 [m] 5 4 Studded tire 3 2 1 Desired path Front axle Rear axle 0 Yaw angle 40 60 80 100 120 140 [m] Figure 1 Doing a single lane change on ice using three different tires with the ESC system on.
Preparation for R13H test of mini bus with pneumatic suspension
Architecture for Services towards System Integration CANBUS Speed Steering Weight Diagnostics Programmation Air Compressor LED Humidity Sensor Timer LED Temperature LED Sensor TWI CAN Pressure Sensor Inlet Outlet A/D Valve Valve Display Micro Controller Ext. Int. Push Buttons Level Sensor A/D Damper PWM Air Bladder Wheel Chair lock Suspension Arm
Future: Vehicle Dynamics Simulations Validation • ISO (with the Swedish Standard Institute) is developing standards for validating vehicle dynamics simulations with respects to real tests. • Steady-state circular driving behaviour • Sine and Dwell
Our research contributes to • Validation of modified utility vehicles • Architecture for Services towards System Integration • New and improved test standards • Methods for validating simulation models • Up-to-date graduate and undergraduate education
Thank you for your attention. deventer@ltu.se
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