Search for dissertations about: "Remaining useful life"

Showing result 1 - 5 of 25 swedish dissertations containing the words Remaining useful life.

2. 1. Improved remaining useful life estimations for on-condition parts in aircraft engines

   Author : Veronica Fornlöf; Anna Syberfeldt; Anders Skoogh; Högskolan i Skövde; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Aircraft engine maintenance; Reliability; Remaining useful life; On-condition parts; Prognosis; Technology; Teknik; Production and Automation Engineering; Produktion och automatiseringsteknik;

   Abstract : This thesis focuses on obtaining better estimates of remaining life for on-condition (OC) parts in aircraft engines. Aircraft engine components are commonly classified into three categories, life-limited parts (LLP), OC-parts and consumables. Engine maintenance typi-cally accounts for 10% to 20% of aircraft-related operating cost. READ MORE

4. 2. Model-based Prognostics for Prediction of Remaining Useful Life

   Author : Madhav Mishra; Jyoti Kumar Sinha; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance Engineering;

   Abstract : Prognostics and healthmanagement (PHM) is an engineering discipline that aims to maintain the systembehaviour and function, and assure the mission success, safety andeffectiveness. Health management using a proper condition-based maintenance (CBM)deployment is a worldwide accepted technique and has grown very popular in manyindustries over the past decades. READ MORE

5. 3. Data-driven battery aging diagnostics and prognostics

   Author : Yizhou Zhang; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; battery management system; remaining useful life; Lithium-ion batteries; machine learning.; state of health;

   Abstract : Lithium-ion (Li-ion) batteries play a pivotal role in transforming the transportation sector from heavily relying on fossil fuels to a low-carbon solution. But, as an electrochemical device, a battery will inevitably undergo irreversible degradation over time. READ MORE

6. 4. Guilt and shame in end-of-life care : the next-of-kin's perspectives

   Author : Carina Werkander Harstäde; Åsa Roxberg; Birgitta Andershed; David Brunt; Unni Lindström; Linnéuniversitetet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; end-of-life care; guilt; hermeneutics; next-of-kin; relatives; secondary analysis; semantic concept analysis; shame; Vårdvetenskap; Caring Science;

   Abstract : Aim: The overall aim of the thesis was to explore and describe the concepts of guilt and shame and gain a greater understanding of the next-of-kin’s experiences of guilt and shame in end-of-life care.Methods: Study I was a qualitative secondary analysis of 47 interviews with next-of-kin searching for experiences of guilt and shame. READ MORE

7. 5. Health Monitoring for Aircraft Systems using Decision Trees and Genetic Evolution

   Author : Mike Gerdes; Diego Galar; Uday Kumar; Dieter Scholz; Piotr Bilski; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Condition Monitoring; Remaining Useful Life Prediction; Decision Tree; Genetic Algorithm; Fuzzy Decision Tree Evaluation; System Monitoring; Aircraft Health Monitoring; Feature Extraction; Feature Selection; Data Driven; Health Prognostic; Knowledge Based System; Supervised Learning; Data-Driven Predictive Health Monitoring; Health Indicators; Machine Learning; Big Data; Pattern Recognition; Drift och underhållsteknik; Operation and Maintenance;

   Abstract : Reducing unscheduled maintenance is important for aircraft operators. There are significant costs if flights must be delayed or cancelled, for example, if spares are not available and have to be shipped across the world. READ MORE