Conceptual Design of a New Planar Motion Mechanism for Investigating theStability and Control Characteristics of Submarines

摘要

Model experiments are performed in the straightline basin of the David TaylorModel Basin (DTMB) using the Planar Motion Mechanism (PMM) to investigate the stability and control characteristics of candidate designs of submarines and other submerged vehicles. The apparatus is used to determine the hydrodynamic forces and moments that are developed on the hull, appendages, and propeller. This information is used to determine the stability and control derivatives in both the vertical and horizontal planes of motion, including the static, rotary, and control derivatives. The existing Planar Motion Mechanism System (PMM) has been in use at DTMB since June 1957. There are critical technical limitations associated with the existing apparatus, including the maximum size of the model that can be used for the tests, the maximum angle that the tilt table can be set, the accuracy of setting the tilt table angle, the maximum strut spacing, the range of oscillation frequencies, the inability to remotely set the phase angle between the struts, and the need to electronically separate the in-phase and out-of-phase quadrature. This report presents a conceptual design for a FMM that would eliminate these limitations. (MM).