Capstone Team  Andre Nylund  Chris Grewell  Craig Lechtenberg  Fadel Al Jutail  Matt Melius  Mufeed Yacoub Team Advisor  Dr. Raul Bayoán Cal Customer  Daimler Trucks North America

Tunnel Details  12,000 sq. ft. facility  Wind speeds up to 65  30ft long test section 21ft wide 26ft tall

Tunnel Details  Pressure sensitive floor for calculating trucks drag coefficient.  Smoke wand for flow visualization  Rotating floor panel to test various angles of attack

Mission Statement: Improve smoke testing methods  Increase the testable area within the wind tunnel  Increase stability of the system  Deliver smoke to location of interest accurately  Electronically controlled system to eliminate human error  Provide these requirements while maintaining negligible aerodynamic impact to test region  Delivery of final product by June,16th

PDS completion – January 30 th  Two axis motion 20’ Horizontal travel 17’ Vertical travel  Zero residual impact when not in use Removes itself form wind tunnel completely when not in use  Aerodynamic Profile External and Internal Search – February 17 th

Test Subject Pressure Probe Air Flow Typically, traversing systems are used to study the airflow behind a test model (ex. pressure probe is downstream of the test subject)

Traversing systems commonly use linear actuators for precise motion control. Common Applications  Flow field and wake survey  behind test section  Small test sections  scale models etc.

Roof Mounted Traversing Probe Traversing Volume  3m x 4m x 6m Positional Accuracy  +/- 1mm

Roof Mounted Traversing Probe  full size automotive wind tunnel  downstream probe Traversing Volume  5m x 12m x 13m Positional Accuracy  +/- 1.5mm

Floor mounted track  Singly supported Range of travel dictated by rail length

Linear Actuators  Pre-fabricated  Sealed Unit  Reliable

Rail and Linear bearing systems  High precision offers accurate placement of carriage

External Search Motion Control  Stepper Motor  Servo Motors and Drives  Gear Boxes

Wind tunnel wall Vertical Rail and Carriage Smoke wand Horizontal Rails and Carriages Wind Tunnel X Z

Smoke Wand Vertical Rail and Carriage Horizontal Rail and Carriage Truck profile Wind Tunnel Horizontal Rail and Carriage Wind tunnel wall X Z

Possible project scope change Wind Tunnel Wind tunnel wall Vertical Rail and Carriage Horizontal Rail and Carriage Cantilever cable support Carbon Fiber Smoke Wand X Z

PDS completion – January 30 th  Two axis motion 20’ Horizontal travel 17’ Vertical travel  Zero residual impact when not in use Removes itself form wind tunnel completely when not in use  Aerodynamic Profile External and Internal Search – February 17 th Concept selection – February 22 nd  Cantilever Detailed Design– February 22 nd to May 18 th Fabrication completion – May 31 st Product delivery – June 16 th

Load Calculations  Gravity on the Horizontal rail  355 N  Gravity on the smoke wand  107 N  Wind load on the smoke wand  Distributed load of 361N  Moment of 990 N*m at wand support rollers  Weight of the entire system Horizontal Rail Smoke Wand Vertical Rails Horizontal Carriage Wind Tunnel Wall Vertical Carriages Drive Motor Wand Support Rollers Wind Tunnel X Z

 Mechanical Component Selection  Horizontal rail and carriage  Vertical rail and carriage  Lifting mechanics  Lifting motors  Structural Design  Vertical rail supports  Baseplate mounting  Structure stabilization

 Control System  Safety  Operational safety  Limit switches  Human interaction  Zero energy state  Vertical motion lockout

Questions