Essays about: "damped"

Showing result 1 - 5 of 60 essays containing the word damped.

  1. 1. Moderling Acoustic Transmission in Towed Array Sonars : Computations of the coupled acoustic and elastic wave equations

    University essay from KTH/Matematik (Avd.)

    Author : Bill Claesson; [2023]
    Keywords : ;

    Abstract : This thesis presents a method of solving the Helmholtz equation coupled with the Navier-Cauchy equation over a cross section of a Towed Array Sonar (TAS) modeled as a simplified cylindrical shell. The purpose of solving these equations is to estimate the transfer function of the pressure between the outside boundary and a position inside the TAS. READ MORE

  3. 2. Dynamic Consequences of Bearing Radial Clearance in Jeffcott Rotors

    University essay from Umeå universitet/Institutionen för matematik och matematisk statistik

    Author : Marcus Bohman; [2023]
    Keywords : ;

    Abstract : Earlier research on bearing radial clearance on a vertical Jeffcott rotor is rare, but an interesting and realistic point of view in a rotor system. Applying this force to the system produces interesting results for a vertical Jeffcott rotor. READ MORE

  4. 3. Dynamic response of damped attachments in fighter applications

    University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Author : Katja Nordström; [2023]
    Keywords : Vibration isolator; printed circuit board; vibrations; natural frequency; Vibrationsisolator; kretskort; vibrationer; resonansfrekvenser;

    Abstract : This thesis investigates the impact of vibration isolators on circuit boards during harsh vibrationenvironments that occur when they are mounted on the wings of a fighter jet. To examine thisphenomenon, a mathematical model and a simulated model were developed to determine theresonant frequencies of the circuit board under various boundary conditions. READ MORE

  5. 4. The Application of a TCSC Controller to Improve the Stability of a Power System With High Penetration of Renewable Energy

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

    Author : Albin Wanhainen; Axel Gomér; [2023]
    Keywords : ;

    Abstract : The goal of this project is to examine how a higher penetration of power electronics-basedforms of power production affects system stability and damping. The project covers howpower system stability can be improved by using a Thyristor Controlled Series Capacitor(TCSC) with Power Oscillation Damping (POD). READ MORE

  6. 5. Application of harmonic injection method to analyse Sub-Synchronous Control Interactions (SSCI)

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

    Author : Linus Eriksson; [2022]
    Keywords : Sub-synchronous control interaction SSCI ; damping of SSCI; DFIG; PSCAD; Power Oscillation Damper POD ; Harmonic Injection; Subsynkrona kontrollinteraktioner SSCI ; dämpning av SSCI; DFIG; PSCAD; Dämptillsats POD ; Harmonisk Injection;

    Abstract : Wind farms are commonly connected to the main grid through compensated lines which increases the power transfer capability of the line. Double Fed Induction Generator (DFIG) wind turbines in connection to compensated lines can experience Sub-Synchronous Control Interaction (SSCI) which can bring system quantities above allowed levels. READ MORE