1. Team CNH Design a less expensive propulsion control system with equivalent or better performance than existing hardware for Hydrostatic Windrower Machine. Mission Statement: Forward

2. Customer Wants Low Cost Very Reliable Easy to Use Easy Maintenance High Level of Accuracy Comfortable to Use Minimal Machine Redesign Highly Repeatable Continued Operation Ability High Perception of Safety

3. Constraints System Must Be Safe System Must Meet all ASAE Codes Total System < $300.00

4. Benchmarking Current CNH System

5. Benchmarking John DeereHesston

6. Design Metrics Time to Reach Neutral Total Cost Response Time Serviceability Index Component Effects Energy Usage Repeatability Rate Number of Parts Changed

7. Design Target Values Stopping Time < 10 Seconds Total Cost < $250.00 Response Time < ¼ Second Serviceability Index < 237 12 Volt System, Draw < 30 Amps Mean Time Between Failures > 3,240 Hours Number of Parts Replaced <4

8. Design Breakdown

9. Motion Actuation

10. Concept 1- Rotary Actuator

11. Motion Actuation Concept 2- Linear Actuator

12. Actuation Design Decision Chose to Use A Linear Actuator Because: Least Expensive Solution Smallest Amount of Machine Redesign More Durability Lowest Energy Requirements

13. Safety Return

14. Concept 1- Engine Shutoff Benefits: Least Expensive and Easiest to Implement Major Problems: Complete Loss of Operation After Failure Customer Perception of “Unsafe”

15. Safety Return Concept 2- Collapsible Linkage Normal Operating Conditions Failure Mode

16. Safety Return Concept 3-Hydrostatic Braking

17. Safety Return Concept 4- Hydro-Mechanical Failsafe

18. Safety Return Design Decision Chose the Hydro-Mechanical Failsafe Because: Safe Low Cost Quick Time to Reach Neutral Position Ability to Use Other Functions After Propulsion Shutoff

19. Final Design Assembly

20. How Does it Work?

21. Reverse vs. Forward Engine Shutoff Machine will not be cutting crop in reverse Center of gravity is close to front of machine Reverse speed much less than maximum forward speed Machine will not be moving in reverse on roadways

22. Future Controller Design

23. Validation- Machine Tests How Will Machine React if Engine is Shutoff While Operating in Reverse?

24. Validation- Machine Tests Engine RPMCylinder Position Ground Speed

25. Validation- FMEA Failure Modes and Effects Analysis Identifies Potential Failure Modes Estimates Occurrence Rate Assess Severity of Failure Evaluates Potential To Detect Failure Recommends a Design Action to Lower Risk if Needed

26. Sample FMEA

27. Validation- Cost Breakdown

28. Validation-Stress Analysis

29. Path Forward Finalize Actuator Supplier Build Prototype Write Controller Code Test Mean Time Between Failure in Lab Perform Field Tests

30. QUESTIONS ?

31. Final Design Layout

32. Spring Return Mechanism Existing CNH Return Spring

33. Hydraulic Cylinder + Valve

34. Linear Actuator

35. Hydraulic / Spring Connection To Pintel Arm To Spring Assembly Hydraulic Connection

36. Actuator Mounting Bracket

37. Actuator-Cylinder Connection

38. Controller Diagram DC Motor C i PWM Screw Linear actuator CdCd rdrd eded riri eiei ydyd yiyi  r d : Reference Displacement e d : Error Displacement C d : Displacement Controller R i : Reference Current E i :Current Error C i /PMW: Current Controller Y i : Output Current Y d :Output Displacement

39. Validation- Stress Analysis