Essays about: "Piecewise"

Showing result 16 - 20 of 53 essays containing the word Piecewise.

  1. 16. A comparative study regarding weakly stationarity assumptions and time dependency : Signal processing of vibrational loading and its influence on fatigue life

    University essay from Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Author : Rikard Dahlman; Ebba Johansson; [2018]
    Keywords : Stationarity; Test for weakly stationarity; Reverse arrangements test; Runs test; Signal processing; Fatigue life; Time dependency; Piecewise weakly stationary.;

    Abstract : Simplifications regarding calculations of fatigue life due to vibrational loading is based on weakly stationarity assumptions which is a time independent method. The hypothesis was based on the uncertainty of these assumptions. The aim of this study was to examine whether the analysed data fulfilled the assumptions of weakly stationarity. READ MORE

  3. 17. The Compression of IoT operational data time series in vehicle embedded systems

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

    Author : Renzhi Xing; [2018]
    Keywords : Data compression; Data transmission; Time series data; IoT; CAN; Vehicle connectivity; Datakomprimering; Dataöverföring; Tidsseriedata; IoT; CAN; Uppkopplade fordon;

    Abstract : This thesis examines compression algorithms for time series operational data which are collected from the Controller Area Network (CAN) bus in an automotive Internet of Things (IoT) setting. The purpose of a compression algorithm is to decrease the size of a set of time series data (such as vehicle speed, wheel speed, etc. READ MORE

  4. 18. Dynamic Path Planning for Autonomous Unmanned Aerial Vehicles

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

    Author : Urban Eriksson; [2018]
    Keywords : Path planning; RRT; RRT*; UAV;

    Abstract : This thesis project investigates a method for performing dynamic path planning in three dimensions, targeting the application of autonomous unmanned aerial vehicles (UAVs).  Three different path planning algorithms are evaluated, based on the framework of rapidly-exploring random trees (RRTs): the original RRT, RRT*, and a proposed variant called RRT-u, which differs from the two other algorithms by considering dynamic constraints and using piecewise constant accelerations for edges in the planning tree. READ MORE

  5. 19. Numerical Optimal Control of Hybrid Electric Trucks : Exhaust Temperature, NOx Emission and Fuel Consumption

    University essay from Linköpings universitet/Fordonssystem

    Author : Fredrik Andersson; Hampus Andersson; [2018]
    Keywords : Numerical optimal control; HEV; Diesel electric hybrid truck; Exhaust temperature; Emissions; NOx; SCR;

    Abstract : The controls for a parallel hybrid electric truck are optimized using numerical optimal control. Trade-offs between catalyst light-off times, NOx emission and fuel consumption have been investigated for cold starts at two operating points, as well as temperature differences between conventional and hybrid powertrains during WHTC (World Harmonized Transient Cycle). READ MORE

  6. 20. Stream Classification and Solubility of the Dispersion Equation for Piecewise Constant Vorticity

    University essay from Linköpings universitet/Matematiska institutionen; Linköpings universitet/Tekniska fakulteten

    Author : Marianne Söderholm; [2018]
    Keywords : Water waves; stream solutions; dispersion equation.;

    Abstract : This thesis concerns the water wave problem corresponding to a piecewise constant vorticity function. There are several results connected to this field. READ MORE