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

Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass filters, manage...
Control Systems: Applications01:25

Control Systems: Applications

Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The direction...
PI Controller: Design01:24

PI Controller: Design

Proportional Integral (PI) controllers are a fundamental component in modern control systems, widely used to enhance performance and mitigate steady-state errors. They are particularly effective in applications such as automatic brightness adjustment on smartphones, where they excel at mitigating steady-state errors for step-function inputs. Unlike PD controllers, which require time-varying errors to function optimally, PI controllers leverage their integral component to address residual...
Feedback control systems01:26

Feedback control systems

Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
PD Controller: Design01:26

PD Controller: Design

In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...

You might also read

Related Articles

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

Sort by
Same author

Transient surface velocity measurements in a liquid by an active ultrasonic probe.

IEEE transactions on ultrasonics, ferroelectrics, and frequency control·2008
Same author

STM observation of a single diarylethene flickering.

Ultramicroscopy·2007
Same author

Simulation and data reconstruction for NDT phased array techniques.

Ultrasonics·2006
See all related articles

Related Experiment Video

Updated: Jul 19, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Control of complex components with Smart Flexible Phased Arrays.

O Casula1, C Poidevin, G Cattiaux

  • 1Commissariat à l'Energie Atomique. CEA Saclay, Bat 611, 91191 Gif sur Yvette, France. olivier.casula@cea.fr <olivier.casula@cea.fr>

Ultrasonics
|October 31, 2006
PubMed
Summary

Flexible phased array transducers adapt to complex shapes, overcoming limitations of wedge transducers for improved ultrasonic testing. This technology enhances flaw detection in components with irregular geometries.

More Related Videos

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection
05:04

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection

Published on: June 13, 2023

Related Experiment Videos

Last Updated: Jul 19, 2026

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection
05:04

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection

Published on: June 13, 2023

Area of Science:

  • Materials Science
  • Non-Destructive Testing
  • Acoustics

Background:

  • Traditional ultrasonic wedge transducers struggle with complex component geometries, leading to coupling issues, beam distortion, and reduced inspection sensitivity.
  • Variable coupling layer thickness and component shape variations cause significant challenges in ultrasonic inspections, resulting in shadow areas and split beams.

Purpose of the Study:

  • To develop and validate a novel Smart Flexible Phased Array Transducer capable of adapting to complex and changing geometries for enhanced ultrasonic inspections.
  • To overcome the limitations of conventional ultrasonic testing methods in inspecting components with irregular 2D and 3D shapes.

Main Methods:

  • Development of flexible phased array transducers with independent piezoelectric elements and an embedded profilometer to measure local surface distortion.
  • Real-time computation of adapted delay laws using an algorithm to compensate for geometric distortions based on profilometer data.
  • Integration of delay laws into the ultrasonic testing acquisition system for real-time beam focusing and adaptation.

Main Results:

  • Prototypes of the Smart Flexible Phased Array Transducer were successfully integrated and tested on mock-ups with machined flaws and irregular shapes.
  • The self-adaptive process maintained focused beam features (orientation and focal depth) during scanning on complex surfaces.
  • Inspections demonstrated enhanced performance and validated the mechanical and acoustical behavior of the flexible probes.

Conclusions:

  • The Smart Flexible Phased Array Transducer concept is validated as an effective solution for ultrasonic inspections on complex geometries.
  • This technology significantly improves inspection performance by compensating for distortions caused by irregular component shapes.
  • Flexible phased arrays offer a promising advancement for non-destructive testing in challenging industrial applications.