Essays about: "farkost"

Showing result 21 - 25 of 85 essays containing the word farkost.

  1. 21. Transonic Flow Features in a Nozzle Guide Vane Passage

    University essay from KTH/Farkost och flyg; KTH/Mekanik

    Author : Alessandro Ceci; [2017]
    Keywords : CFD; LES; Indirect Combustion Noise; Aeroacoustics;

    Abstract : The entropy noise in modern engines is mainly originating from two types of mechanisms.First, chemical reactions in the combustion chamber lead to unsteady heat releasewhich is responsible of the direct combustion noise. READ MORE

  3. 22. The Usage of Gyros in North Finding Systems

    University essay from KTH/Farkost och flyg

    Author : Quentin Le Gall; [2017]
    Keywords : North finding; Maytagging; Carouseling; gyro-compassing;

    Abstract : As surprising as it may seem, accurate north finding, with an error of only several milli-radian, is still a very difficulttask and has been achieved only with very expensive systems. On the contrary, there are very simple systems that give theazimuth with an angular error five times superior but for a price a hundred times inferior. READ MORE

  4. 23. Feasibility Study for Single Platform Airborne FDOA and TDOA Estimation With Unknown Source

    University essay from KTH/Skolan för elektro- och systemteknik (EES)

    Author : Alexander Karlsson; [2016]
    Keywords : ;

    Abstract : Direction of arrival (DOA) estimation is a well studied topic and used in many different applications. Although it is usually based on time-difference-of-arrival (TDOA) of coherent signals, it is sometimes possible to also use frequency-difference-of-arrival (FDOA). By combining TDOA and FDOA a more reliable estimate of the DOA can be obtained. READ MORE

  5. 24. Long term chaotic attitude behaviour on highly eccentric orbits : INTEGRAL Case Study

    University essay from KTH/Farkost och flyg

    Author : Davide Menzio; [2016]
    Keywords : long-term propagation; attitude; stability; Poincaré map; momentum sphere.;

    Abstract : The main issues discussed in this paper are related to the refinement of the on-ground casualty risk computation for the specific case of INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL). The current approach, unable to predict the spacecraft attitude motion, assumes random tumbling motion as initial condition to simulate the fragmentation process. READ MORE

  6. 25. Attitude Determination and Control of the CubeSat MIST

    University essay from KTH/Farkost och flyg

    Author : Jiewei Zhou; [2016]
    Keywords : ;

    Abstract : The ADCS concept in MIST reects the limitations of the CubeSat in terms of space, power and onboard computer computational capability. The control is constrained to the use of only magnetic torquers and the determination to magnetometers and Sun sensors in spite of the the under-actuation and underdetermination during eclipses. READ MORE