Accession Number : ADA263512


Title :   Sway, Yaw, and Roll Coupling Effects on Straight Line Stability of Submersibles


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Cunningham, II, Daniel J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a263512.pdf


Report Date : Mar 1993


Pagination or Media Count : 84


Abstract : This thesis analyzes the sway, yaw, and roll dynamic stability of neutrally buoyant submersibles. Utilizing the hydrodynamic coefficients for a Mark IX Swimmer Delivery Vehicle (SDV) as a base-line model, the linearized equations of motion for the decoupled steering and roll systems are compared to the coupled system. Two different configurations of hydrodynamic coefficients are considered along with the effects of varying the vertical (Zg) and longitudinal (Xg) centers of gravity of the vehicle while the longitudinal center of buoyancy (Xb) is held constant. Results demonstrate the significant effects on stability of coupling the steering and roll equations of motion, and the importance of Zg and Xg selection in minimizing those effects while retaining stability. Perturbation analysis results confirm the essential dependence of the linearized coupled equations on the separation of Xg and Xb... . Straight line stability of neutrally buoyant Submersibles; Dynamic coupling, Submersibles, Steering and roll equations.


Descriptors :   *STABILITY , *ROLL , *YAW , *SUBMERSIBLES , STEERING , DELIVERY , EQUATIONS OF MOTION , MODELS , DYNAMICS , THESES , BASE LINES , COEFFICIENTS , CONFIGURATIONS , CONSTANTS , GRAVITY , SEPARATION , PERTURBATIONS , VEHICLES , SWIMMERS , SELECTION , HYDRODYNAMICS , BUOYANCY , COUPLINGS


Subject Categories : Submarine Engineering
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE