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

Energy in Simple Harmonic Motion01:23

Energy in Simple Harmonic Motion

13.3K
To determine the energy of a simple harmonic oscillator, consider all the forms of energy it can have during its simple harmonic motion. According to Hooke's Law, the energy stored during the compression/stretching of a string in a simple harmonic oscillator is potential energy. As the simple harmonic oscillator has no dissipative forces, it also possesses kinetic energy. In the presence of conservative forces, both energies can interconvert during oscillation, but the total energy remains...
13.3K
Problem Solving: Energy in Simple Harmonic Motion01:17

Problem Solving: Energy in Simple Harmonic Motion

2.3K
Simple harmonic motion (SHM) is a type of periodic motion in time and position, in which an object oscillates back and forth around an equilibrium position with a constant amplitude and frequency. In SHM, there is a continuous exchange between the potential and kinetic energy, which results in the oscillation of the object.
Consider the spring in a shock absorber of a car. The spring attached to the wheel executes simple harmonic motion while the car is moving on a bumpy road. The force on the...
2.3K
Simple Harmonic Motion01:21

Simple Harmonic Motion

16.0K
Simple harmonic motion is the name given to oscillatory motion for a system where the net force can be described by Hooke's law. If the net force can be described by Hooke's law and there is no damping (by friction or other non-conservative forces), then a simple harmonic oscillator will oscillate with equal displacement on either side of the equilibrium position. To derive an equation for period and frequency, the equation of motion is used. The period of a simple harmonic oscillator is given...
16.0K
Frequency of Spring-Mass System01:17

Frequency of Spring-Mass System

8.2K
One interesting characteristic of the simple harmonic motion (SHM) of an object attached to a spring is that the angular frequency, and the period and frequency of the motion, depend only on the mass and the force constant of the spring, and not on other factors such as the amplitude of the motion or initial conditions. We can use the equations of motion and Newton's second law to find the angular frequency, frequency, and period.
Consider a block on a spring on a frictionless surface. There...
8.2K
Conservation of Mechanical Energy01:05

Conservation of Mechanical Energy

25.4K
The mechanical energy E of a system is the sum of its potential energy U and the kinetic energy K of the objects within it. What happens to this mechanical energy when only conservative forces cause energy transfers within the system—that is, when frictional and drag forces do not act on the objects in the system? Also assume that the system is isolated from its environment; in other words no external force from an object outside the system causes energy changes inside the system.
When a...
25.4K
Optimal Foraging00:48

Optimal Foraging

14.2K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
14.2K

You might also read

Related Articles

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

Sort by
Same author

Geometry-driven multimodal tactile sensors with high-fidelity perception enabled by strain-invariant oxidized liquid metal electrodes.

Materials horizons·2026
Same author

Carcinogens in Petroleum-derived Products: Evaluation of Benzene, Ethylbenzene, and Other Carcinogens Under High Temperatures.

Safety and health at work·2026
Same author

A Data-Driven and Interpretable Framework for Discovering New Analytical Detection Mechanisms in Surface-Enhanced Raman Scattering Sensors.

ACS sensors·2026
Same author

A small molecule modulating heterogeneous amyloid-β isoforms improves cognitive and pathological outcomes in acute and 5XFAD Alzheimer's disease models.

Alzheimer's research & therapy·2026
Same author

Prevalence and risk outcomes of overheating, fire and explosion incidents related to electronic nicotine delivery systems.

Tobacco control·2026
Same author

Quantitative analysis of novel brominated flame retardants using multilayer silica/Florisil purification coupled with GC-MS/MS and assessment of their levels in vegetables by plant parts.

Environmental pollution (Barking, Essex : 1987)·2026

Related Experiment Video

Updated: Mar 29, 2026

Early Metamorphic Insertion Technology for Insect Flight Behavior Monitoring
19:14

Early Metamorphic Insertion Technology for Insect Flight Behavior Monitoring

Published on: July 12, 2014

15.2K

Optimization of Ornithopter Energy Efficiency Through Spring-Induced Harmonic Motion.

Jimin Kim1, Ji-Chul Ryu2

  • 1North London Collegiate School Jeju, Seogwipo-si 63644, Republic of Korea.

Biomimetics (Basel, Switzerland)
|March 27, 2026
PubMed
Summary

Adding a lightweight torsional spring passively tunes flapping-wing systems toward resonance. This passive mechanical tuning significantly improves thrust and kinematic efficiency in ornithopters, enhancing flight performance and endurance.

Keywords:
energy efficiencyflapping-wing UAVharmonic oscillatorornithopterresonance tuning

More Related Videos

Building an Enhanced Flight Mill for the Study of Tethered Insect Flight
12:09

Building an Enhanced Flight Mill for the Study of Tethered Insect Flight

Published on: March 10, 2021

3.6K
Measuring the Flight Ability of the Ambrosia Beetle, Platypus Quercivorus Murayama, Using a Low-Cost, Small, and Easily Constructed Flight Mill
07:37

Measuring the Flight Ability of the Ambrosia Beetle, Platypus Quercivorus Murayama, Using a Low-Cost, Small, and Easily Constructed Flight Mill

Published on: August 6, 2018

8.2K

Related Experiment Videos

Last Updated: Mar 29, 2026

Early Metamorphic Insertion Technology for Insect Flight Behavior Monitoring
19:14

Early Metamorphic Insertion Technology for Insect Flight Behavior Monitoring

Published on: July 12, 2014

15.2K
Building an Enhanced Flight Mill for the Study of Tethered Insect Flight
12:09

Building an Enhanced Flight Mill for the Study of Tethered Insect Flight

Published on: March 10, 2021

3.6K
Measuring the Flight Ability of the Ambrosia Beetle, Platypus Quercivorus Murayama, Using a Low-Cost, Small, and Easily Constructed Flight Mill
07:37

Measuring the Flight Ability of the Ambrosia Beetle, Platypus Quercivorus Murayama, Using a Low-Cost, Small, and Easily Constructed Flight Mill

Published on: August 6, 2018

8.2K

Area of Science:

  • Robotics
  • Aerospace Engineering
  • Mechanical Engineering

Background:

  • Ornithopters utilize flapping wings for lift and thrust.
  • Control-based optimization is common for ornithopter efficiency.
  • Passive mechanical tuning for ornithopter efficiency is underexplored.

Purpose of the Study:

  • Investigate passive mechanical tuning using a lightweight torsional spring.
  • Tune a flapping-wing system toward resonance to reduce power input.
  • Enhance aerodynamic performance and flight efficiency of ornithopters.

Main Methods:

  • Evaluated springs of varying stiffness on a 3D-printed flapping rig.
  • Recorded input power (voltage, current), flapping frequency, and thrust.
  • Analyzed wing kinematics via high-speed video and identified resonance frequency.

Main Results:

  • An optimally tuned spring-assisted system showed up to threefold improvement in thrust efficiency.
  • Kinematic efficiency improved up to twofold compared to the no-spring baseline.
  • Commercial ornithopter tests revealed a 12.8% increase in average endurance.

Conclusions:

  • Passive torsional spring tuning near resonance effectively enhances ornithopter energy efficiency.
  • Spring assistance improves aerodynamic output and reduces energy losses.
  • This passive method complements active control optimization for flapping-wing UAVs.