Preprint / Version 2

Maximizing Ollie Height by Optimizing Control Strategy and Skateboard Geometry Using Direct Collocation

##article.authors##

  • Jan T. Heinen Delft University of Technology
  • Samuel G. Brockie Delft University of Technology
  • Raymund ten Broek Urbansports Performance Centre
  • Eline van der Kruk Delft University of Technology
  • Jason K. Moore Delft University of Technology

DOI:

https://doi.org/10.31224/3171

Keywords:

skateboarding, friction, impact, optimal control, trajectory optimization, parameter optimization, direct collocation

Abstract

The ollie is the base aerial human-board maneuver, foundational to most modern skateboarding tricks. We formulate and solve an optimal control problem of a two-dimensional simplified human model and a rigid body skateboard with the objective of maximizing the height of the ollie. Our solution simultaneously discovers realistic human-applied force trajectories and optimal board geometry. We accomplish this with a direct collocation formulation using a null seed initial guess by carefully modeling the discontinuous aspects of board-ground impact and foot-board friction. This leads to very efficient and robust solutions that are 10 times more computationally efficient than prior work on similar problems. The solutions show that ollie height can increase 3% by decreasing the wheelbase and that a smaller board with a back-foot dominated force strategy can give 12% higher ollies. Our model can be used to inform jump strategy and the effects of changes to the essential board geometry.

Downloads

Download data is not yet available.

Downloads

Posted

2023-08-14 — Updated on 2023-11-06

Versions

Version justification

Edits made after a round of reviews from a journal.