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    Design of a controllable pitch underwater thruster system

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    Keefe_thesis.pdf (14.44Mb)
    Date
    1993-08
    Author
    Keefe, Robert W.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/5531
    DOI
    10.1575/1912/5531
    Keyword
    Remote submersibles
    Abstract
    Control systems for underwater vehicles have reached the level of sophistication where they are limited by the dynamic performance of the thrust actuators. Standard fixed-pitch propellers have been shown to have very poor dynamic characteristics, particularly at low thrust levels The dynamic response of a fixed-pitch propeller is dependent upon highly non-linear transients encountered while the shaft speed approaches its steady-state value. This thesis proposes the use of a controllable pitch propeller system to address this problem. A controllable pitch propeller varies the amount of thrust produced by varying the pitch angle of the blades at a constant shaft speed. The bandwidth of this type of thrust actuator would be dependent primarily on the speed at which the pitch angle of the blades are changed. A variable pitch propeller system suitable for retrofit into an ROV is designed and built. The system is designed for maximal pitch angle bandwidth with low actuator power consumption.
    Description
    Submitted in partial fulfillment of the requirements for the degree of Master of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution August 1993
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    • WHOI Theses
    Suggested Citation
    Thesis: Keefe, Robert W., "Design of a controllable pitch underwater thruster system", 1993-08, DOI:10.1575/1912/5531, https://hdl.handle.net/1912/5531
     

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