Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Magnetic Damping01:17

Magnetic Damping

1.2K
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
1.2K
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

901
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
901
Rolling Resistance01:21

Rolling Resistance

730
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down due to...
730
Static and Kinetic Frictional Force01:05

Static and Kinetic Frictional Force

26.2K
One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...
26.2K
Maximum Deflection01:13

Maximum Deflection

1.1K
When analyzing beams under unsymmetrical loads, such as a train moving on a bridge, it is crucial to accurately determine the points of maximum stress and deflection. The process involves identifying the maximum deflection of the beam, which may not always occur at its midpoint due to the uneven distribution of the load.
The maximum deflection occurs at a specific point, known as point O, where the tangent to the deflection curve is horizontal. To find point O, the slope of the tangent at any...
1.1K
Static Friction01:18

Static Friction

1.6K
Static friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact. It plays a crucial role in our daily lives, from walking on the ground to driving a car.
For example, consider a scenario where a truck is connected to a car by a rope, ready to tow it along a road. When no external force is applied by the truck, the car remains stationary and is said to be in static equilibrium. In this case, the forces acting on the car, such as gravity and the...
1.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Mechanics of the golf lip out.

Royal Society open science·2025
Same author

A switched optimal control strategy in human balancing on a harmonically moving platform.

Journal of biomechanics·2025
Same author

Adjoint sensitivity method for parameter estimation: applications to inverted pendulum and human standing balance.

Journal of the Royal Society, Interface·2025
Same author

Transient chaotic behavior of fuzzy controlled polishing processes.

Chaos (Woodbury, N.Y.)·2022
Same author

Response to perturbation during quiet standing resembles delayed state feedback optimized for performance and robustness.

Scientific reports·2021
Same author

Nonsmooth analysis of three-dimensional slipping and rolling in the presence of dry friction.

Nonlinear dynamics·2019
Same journal

RNA-ligand complexes and the attenuation of neutral confinement in the evolution of RNA secondary structures.

Journal of the Royal Society, Interface·2026
Same journal

Individual detachment-reintegration events in homing pigeon flocks and the dominance of directional adjustment in their kinematic features.

Journal of the Royal Society, Interface·2026
Same journal

Thermal stress disrupts symbiotic fluid dynamics in bobtail squid.

Journal of the Royal Society, Interface·2026
Same journal

Distinct geometrical landscapes distinguish between modes of tristability in gene regulatory networks.

Journal of the Royal Society, Interface·2026
Same journal

Slow modulation of the contraction patterns in Physarum polycephalum.

Journal of the Royal Society, Interface·2026
Same journal

Moo-ving mountains: grazing agents drive terracette formation on steep hillslopes.

Journal of the Royal Society, Interface·2026
See all related articles

Related Experiment Video

Updated: Mar 16, 2026

WheelCon: A Wheel Control-Based Gaming Platform for Studying Human Sensorimotor Control
08:18

WheelCon: A Wheel Control-Based Gaming Platform for Studying Human Sensorimotor Control

Published on: August 15, 2020

5.5K

Stabilizing skateboard speed-wobble with reflex delay.

Balazs Varszegi1, Denes Takacs2, Gabor Stepan3

  • 1Department of Applied Mechanics, Budapest University of Technology and Economics, Budapest, Hungary varszegi@mm.bme.hu.

Journal of the Royal Society, Interface
|August 19, 2016
PubMed
Summary
This summary is machine-generated.

This study models skateboard-skater dynamics using a proportional-derivative (PD) controller. It reveals how control gains and skater reflex delay affect stability, explaining high-speed instability and optimal standing position.

Keywords:
human balancingnon-holonomic mechanicsskateboardtime delay

More Related Videos

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
07:19

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance

Published on: March 19, 2020

6.4K
Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis
08:08

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Published on: May 8, 2014

17.4K

Related Experiment Videos

Last Updated: Mar 16, 2026

WheelCon: A Wheel Control-Based Gaming Platform for Studying Human Sensorimotor Control
08:18

WheelCon: A Wheel Control-Based Gaming Platform for Studying Human Sensorimotor Control

Published on: August 15, 2020

5.5K
A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
07:19

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance

Published on: March 19, 2020

6.4K
Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis
08:08

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Published on: May 8, 2014

17.4K

Area of Science:

  • Robotics and Control Systems
  • Mechanical Engineering
  • Biomechanics

Background:

  • Skateboard-skater systems exhibit complex dynamics, often becoming unstable at higher speeds.
  • Human control is crucial for maintaining balance, but its precise influence is not fully quantified.

Purpose of the Study:

  • To develop a mechanical model analyzing skateboard-skater dynamics with human control.
  • To investigate the impact of control parameters and skater reflex delay on system stability.
  • To explain the phenomenon of high-speed instability in skateboarding.

Main Methods:

  • A simple mechanical model of the skateboard-skater system was analyzed.
  • Neutral delay-differential equations were used to describe the system's motion.
  • Linear stability analysis of rectilinear motion was performed analytically.

Main Results:

  • Control gains can be adjusted with skateboard speed to stabilize uniform motion.
  • The critical reflex delay was determined as a function of speed.
  • An explanation for high-speed linear instability was provided.

Conclusions:

  • Standing ahead of the board's center offers advantages regarding reflex delay and control gain sensitivity.
  • The model provides insights into stabilizing skateboard-skater systems through optimized control strategies.
  • Understanding these dynamics is key for improving skateboarding performance and safety.