P07307: Controls for Dynamic Suspension Sponsor: After Hours Racing, LLC Overview Develop a dynamic suspension system for sprint race car. Improve responses to track variations and improving traction. The track variances include banking degree, corner radii, surface composition, roughness, etc. When the sprint car is properly setup for a given track condition, the dynamic suspension will correct for under steer, over steer, and bump response; all resulting in performance gains. Therefore the suspension offers an active solution for any number of track conditions. Through the use of an autonomous control system the car is able to monitor performance and output a response to the suspension. Team Members Kapil Chandersen, EE Todd Simon, EE Mark Lifson, CE Khue Ho, EE (Left to Right) Objectives Develop an active race car suspension system to improve traction Suspension depends on varying track condition, capable of absorbing bumps and ruts while maintaining stability Using MR (magneto rheological) fluid to dynamically adjust the damping co-efficient to adapt to its perceived environment. System is applied on rear right tire to maximize its effect MR shock replacing the mechanically adjustable shock Shock position Rear right tire Coil-over spring Required range of compression slope Shock Dynamics General rebound and compression analysis of commonly used shocks Plotted in Velocity (in/sec) vs. Force (lbs) Shows the rebound and compression sampling co-efficient are symmetrical in nature Customer requirement of valvings between 0-6 Required range of rebound slope Accerlerometers MCU Current Amplifying Circuit Yaw Rate Sensor Conclusion This project was successful in meeting customer requirements and design specifications. However to further improve the testing and refinement performance of the project it is recommended to look into system interfacing and mechanical bench testing. Acknowledgements Professor Slack- EE Team Guide/ Mentor Special Thanks to Jim Morgan and Mark Lafler of After Hours Racing LLC on their technical expertise of sprint race cars