This chapter presents models for environmental forces and moments. These include models for: wind, waves, and ocean currents. The models are used for simulation, testing and verification of feedback control systems. For control system design it is common to assume the principle of superposition when considering wind and wave disturbances. For most marine control applications this is a good approximation. Mathematical models of wind forces and moments are used in motion control systems to improve the performance and robustness of the system in extreme conditions. A motion control system can be simulated under influence of wave‐induced forces by separating the first‐order and second‐order effects. The chapter discusses the methods based on response amplitude operators (RAOs) and linear state‐space models. Ocean currents are horizontal and vertical circulation systems of ocean waters produced by gravity, wind friction and water density variation in different parts of the ocean.

    motion control; environmental factors; linear feedback control systems; marine vehicles; state‐space methods


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    Title :

    Environmental Forces and Moments


    Contributors:


    Publication date :

    2011-04-08


    Size :

    39 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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