Sökning: "structural health monitoring"

Visar resultat 16 - 20 av 26 uppsatser innehållade orden structural health monitoring.

  1. 16. Vibro-acoustic monitoring for in-flight spacecraft

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Víctor Manuel Villlalba Corbacho; [2017]
    Nyckelord :Condition monitoring; space environment; accelerometers; structural health monitoring; spaceflight.;

    Sammanfattning : The concept of using the vibration transmitted through the structure of space systems whilst they are in flight for monitoring purposes is proposed and analysed.The performed patent review seems to indicate that this technique is not currently used despite being, in principle, a good way to obtain valuable knowledge about the spacecraft’s condition. LÄS MER

  3. 17. Structural Health Monitoring of Composite Fan Outlet Guide Vane : Detecting damages and impacts using piezoelectric wafer active sensors and Lamb waves

    Master-uppsats, KTH/Lättkonstruktioner

    Författare :Jonatan Palmquist; [2016]
    Nyckelord :;

    Sammanfattning : The use of composite materials within the aerospace industry has increased in the last decades and is still on the rise. Most composite applications are in the aircraft body parts but engine components such as fan blades and fan outlet guide vanes (FOGV) are now also to be found. LÄS MER

  4. 18. Structural Health Monitoring of Bridges using Machine Learning : The influence of Temperature on the health prediction

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Elisa Khouri Chalouhi; [2016]
    Nyckelord :Damage detection; Structural Health Monitoring; Machine learning; Artificial Neural Network; Railway bridge; Environmental conditions.;

    Sammanfattning : A method that uses machine learning to detect and localize damage in railway bridges under various environmental conditions is proposed and validated in this work. The developed algorithm uses vertical and lateral deck accelerations as damage- sensitive features. LÄS MER

  5. 19. Brazil Bolsa Familia Program: Analysing The Impact of The Conditionalities on School Enrolment, Health and Child Labor

    Kandidat-uppsats, Lunds universitet/Sociologi

    Författare :Chiedozie Franklin Otuonye; [2015]
    Nyckelord :Human capital; Inequality; Bolsa Familia Program; Poverty; Education; Children; Social Sciences;

    Sammanfattning : Abstract With high poverty and inequality rate, the Government in Brazil have adopted several social assistance programs and strategies in the fight against the ever growing rate of poverty and inequality within it’s population since the 1990s. In recent years, the Bolsa Familia Program have been a major social assistance program in Brazil, and the program have affected more than 13 million poor households in their everyday life. LÄS MER

  7. 20. Semi-Analytical Finite Element method for guided waves in civil engineering plate-like structures

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Teknisk geologi; Lunds universitet/Väg- och vattenbyggnad (CI)

    Författare :Christian Nielsen; [2015]
    Nyckelord :seismics; structural health monitoring; lamb waves; SAFE; semi analytical finite element; wave guide finite element; non destructive testing; civil engineering; ultrasound; ultrasonography; comsol; wave guide; plate; Technology and Engineering;

    Sammanfattning : Guided waves have a signicant potential for Structural Health Monitoring (SHM) and Non-Destructive Testing (NDT) due to their relatively long distance of propagation and sensitivity to discontinuities along the propagation path, anywhere through the material thickness. The inability to model wave guides of arbitrary cross-section using current matrix methods, has led to the development of a technique called Semi-Analytical Finite Element (SAFE). LÄS MER