π Case Study
High-Speed Sprayer Stability Upgrade on Steep Terrain
Sprayer roll instability and boom sway during contour passes above 14 km/h
ποΈ Project Overview
Vineyard management in Sonoma County, CA β 22% slope operations
π― Challenge
Sprayer roll instability and boom sway during contour passes above 14 km/h
π§ Design Approach
Dual-axis inertial stabilization mount + top link dynamic damping + revised lower link pivot geometry per ISO 730 Annex D
π Key Calculations
Roll Moment Amplification Factor
M_roll / M_draft
Result: 1.83
Identified need for active roll damping
Kinematic Roll Center Height
h_rc = (lβΒ·lβ)/(lβ + lβ) + h_pivot
Result: 421 mm
Raised roll center reduced lateral acceleration coupling by 41%
π Results
Safe operating speed increased from 10 km/h to 18 km/h; spray drift reduced by 33%; boom leveling accuracy improved from Β±4.7Β° to Β±0.9Β°π‘ Lessons Learned
- β’Roll center height dominates stability more than mass distribution alone
- β’ISO 730 Annex D provides critical guidance for non-planar terrain
- β’Damping must be tuned to match soil-induced frequency spectraβnot just static geometry
β Key Takeaways
- 1Roll center height dominates stability more than mass distribution alone
- 2ISO 730 Annex D provides critical guidance for non-planar terrain
- 3Damping must be tuned to match soil-induced frequency spectraβnot just static geometry