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

Stability of structures01:14

Stability of structures

657
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
657
Kinematic Equations: Problem Solving01:15

Kinematic Equations: Problem Solving

24.2K
When analyzing one-dimensional motion with constant acceleration, the problem-solving strategy involves identifying the known quantities and choosing the appropriate kinematic equations to solve for the unknowns. Either one or two kinematic equations are needed to solve for the unknowns, depending on the known and unknown quantities. Generally, the number of equations required is the same as the number of unknown quantities in the given example. Two-body pursuit problems always require two...
24.2K
Simplification of a Force and Couple System: II01:23

Simplification of a Force and Couple System: II

822
In a three-dimensional system, multiple forces can act on an object. These forces can be combined into a single equivalent force, known as the resultant force. Similarly, the moments generated by these forces can be combined into a single equivalent moment, the resultant couple moment. In certain situations, these two entities may not be mutually perpendicular, meaning they do not have a 90-degree angle between them. This unique condition requires a deeper understanding of the interplay between...
822
Kinematic Equations for Rotation01:30

Kinematic Equations for Rotation

1.1K
In mechanics, when one observes a rigid body in rotational motion with constant angular acceleration, it is possible to establish equations for its rotational kinematics. This process resembles how linear kinematics are dealt with in simpler motion studies.
For instance, imagine a point A on a rigid body engaged in circular motion. The translational velocity of this particular point can be calculated by taking the time derivatives of the displacement equation, which essentially measures the...
1.1K
One-Degree-of-Freedom System01:24

One-Degree-of-Freedom System

997
In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
997

You might also read

Related Articles

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

Sort by
Same author

Feasibility study of a robot-assisted endoscopic technique for plate osteosyntheses of the acetabulum and anterior pelvic ring.

Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology·2026
Same author

Evaluation criteria for mobile X-ray devices - a novel benchmark based on literature review and lead user interviews in trauma surgery and orthopaedics.

Biomedizinische Technik. Biomedical engineering·2026
Same author

Measurement of Hand Function by an Automated Device-System Validation and Usability Analysis.

Sensors (Basel, Switzerland)·2025
Same author

Long-Term Evaluation of Bone Healing Monitoring Using an Instrumented Plate with Measurement Sensors (Smart Implant) over 10 Years.

Sensors (Basel, Switzerland)·2025
Same author

Geriatric Type II Fractures of the Dens Axis: Biomechanical Superiority of a New Osteosynthesis Plate Compared to Common Anterior Screw Fixation.

Global spine journal·2025
Same author

Biomechanical comparison of different double plate constructs for distal supracondylar comminuted femur fractures (AO/OTA 33-A3).

Injury·2025

Related Experiment Video

Updated: Apr 23, 2026

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models
10:09

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models

Published on: October 9, 2014

22.1K

Accuracy of a hexapod parallel robot kinematics based external fixator.

Maximilian Faschingbauer1, Hinrich J D Heuer1, Klaus Seide1,2

  • 1Berufsgenossenschaftliches Unfallkrankenhaus (Trauma Hospital) Hamburg, Department for Trauma Surgery, Orthopaedics and Sportstraumatology, Hamburg, Germany.

The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS
|October 3, 2014
PubMed
Summary

This study precisely measured the accuracy of a motorized hexapod external fixator for bone deformities. The system demonstrated high accuracy in translations and rotations, proving reliable for clinical use.

Keywords:
accuracyexternal fixatorhexapod

More Related Videos

Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms
10:32

Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms

Published on: August 15, 2016

15.3K
Operation of the Collaborative Composite Manufacturing CCM System
10:09

Operation of the Collaborative Composite Manufacturing CCM System

Published on: October 1, 2019

6.2K

Related Experiment Videos

Last Updated: Apr 23, 2026

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models
10:09

Adjustable Stiffness, External Fixator for the Rat Femur Osteotomy and Segmental Bone Defect Models

Published on: October 9, 2014

22.1K
Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms
10:32

Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms

Published on: August 15, 2016

15.3K
Operation of the Collaborative Composite Manufacturing CCM System
10:09

Operation of the Collaborative Composite Manufacturing CCM System

Published on: October 1, 2019

6.2K

Area of Science:

  • Orthopedic biomechanics
  • Medical device engineering

Background:

  • Hexapod external fixators are vital for treating bone deformities and fractures.
  • Comprehensive accuracy data is lacking for many hexapod fixator models.

Purpose of the Study:

  • To evaluate the accuracy of a motorized Precision Hexapod® external fixator.
  • To establish a reliable method for assessing hexapod fixator precision.

Main Methods:

  • Utilized an infrared tracking system to monitor positioning maneuvers.
  • Simulated radiographic projections by omitting one coordinate dimension.
  • Calculated accuracy based on the difference between targeted and measured values.

Main Results:

  • Median accuracy for translations was below 0.3 mm; for rotations, below 0.2°.
  • Quartiles for translations ranged from -0.5 mm to 0.5 mm; for rotations, -1.0° to 0.9°.
  • 149 positioning maneuvers were analyzed.

Conclusions:

  • The experimental setup is precise and reliable for accuracy assessment.
  • This methodology can be used to compare various hexapod fixators.
  • The investigated hexapod system exhibits high accuracy.