Essays about: "fft analysis"

Showing result 6 - 10 of 46 essays containing the words fft analysis.

  1. 6. Digital Signal Characterization for Seizure Detection Using Frequency Domain Analysis

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Jing Li; [2021]
    Keywords : Fourier Transform; Wavelet Transform; EEG and ECG Anomaly Detection; Approximate Entropy; Hellinger Distance; Long Short- Term Memory; Fourier Transform; Wavelet Transform; EEG och ECG Anomalidetektion; Approximativ Entropi; Hellinger Distans; Lång Korttidsminne;

    Abstract : Nowadays, a significant proportion of the population in the world is affected by cerebral diseases like epilepsy. In this study, frequency domain features of electroencephalography (EEG) signals were studied and analyzed, with a view being able to detect epileptic seizures more easily. READ MORE

  3. 7. Quantifying Middle Frequency Transient Currents in Power Consuming Devices

    University essay from Uppsala universitet/Institutionen för elektroteknik

    Author : Alex Lundvall; Vincent Sollie; [2021]
    Keywords : ;

    Abstract : The complexity of electrical systems present in vehicles is continuously rising and the number of interconnected electrical devices is growing during the strive for optimization and reaching higher efficiency levels. Actuation of said devices have the possibility of injecting voltage and current harmonics into the system, thus negatively affecting neighbouring devices. READ MORE

  4. 8. Comparative Study of Vision Camera-based Vibration Analysis with the Laser Vibrometer Method

    University essay from KTH/Industriell produktion

    Author : Pradeep Kumar Muralidharan; Hemanth Yanamadala; [2021]
    Keywords : OpenCV; Motion tracking; motion magnification; vision camera method; FFT; tracker; OpenCV; Rörelsesspårning; Rörelseförstoring; Synkamera -metod; FFT; Spårare;

    Abstract : Vibration analysis is a method that studies patterns in vibration data and measures vibration levels. It is usually performed on time waveforms of the vibration signal directly and on thefrequency spectrum derived by applying the Fourier Transform on the time waveform. READ MORE

  5. 9. Monitoring and predictive maintenance of an industrial line

    University essay from Luleå tekniska universitet/Drift, underhåll och akustik

    Author : Ignacio Gutierrez; [2020]
    Keywords : Reliability; Maintenance; CBM; Health prognostics;

    Abstract : Industry 4.0 push forward the development of concepts such as artificial intelligence, big data, and Industrial Internet of Things, which claims an evolution of the monitoring systems design in terms of the accessibility to the information. READ MORE

  6. 10. Evaluating the performance of a vibration energy harvester under complex excitation

    University essay from Mittuniversitetet/Institutionen för elektronikkonstruktion

    Author : Zhiqiang Chen; [2020]
    Keywords : Vibration energy harvesting; harvester; closed-loop control; resonant frequency; prediction;

    Abstract : In recent years, vibration energy harvesting has become a research hotspot in the field of energy harvesting. Energy harvester output power is the most important parameter in a vibration energy harvesting system. Assessing the harvester output power in different vibration environments is an important study issue to study. READ MORE