The potential use of rudders as anti-roll devices has long been recognized. However, the possible interference of this secondary function of the rudder with its primary role as the steering mechanism has prevented, fo...
The potential use of rudders as anti-roll devices has long been recognized. However, the possible interference of this secondary function of the rudder with its primary role as the steering mechanism has prevented, for many years, the development of practical rudder roll stabilizers. The practical feasibility of rudder roll stabilization has, however, in recent years been demonstrated by two systems designed and developed for operational evaluation aboard two different U.S. C oast G uard Cutters, i.e., Jarvis and Mellon of the 3,000-ton, 378-foot HAMILTON Class. The authors describe the major components of the rudder roll stabilization (RRS) system, along with the design goals and methodology as applied to these first two prototypes. In addition, a brief history of the hardware development is provided in order to show some of the lessons learned. The near flawless performance of the prototypes over the past four years of operational use in the North Pacific is documented. Results from various sea trials and reports of the ship operators are cited and discussed. The paper concludes with a discussion of the costs and benefits of roll stabilization achieved using both a modern anti-roll fin system, as well as two different performance level RRS systems. The benefits of roll stabilization are demonstrated by the relative expansion in the operational envelopes of the USS OLIVER HAZARD PERRY (FFG-7) Class. The varying levels of roll stabilization suggest that the merits of fins and RRS systems are strongly dependent on mission requirements and the environment. The demonstrated performance of the reliable RRS system offers the naval ship acquisition manager a good economical stabilization system.
Vehicle operating policies are developed and a longitudinal controller is designed to satisfy the stringent performance criteria of an Automated Guideway Transit (AGT) System operating under model-reference control. T...
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Vehicle operating policies are developed and a longitudinal controller is designed to satisfy the stringent performance criteria of an Automated Guideway Transit (AGT) System operating under model-reference control. The complete control system is comprised of two parts, a model generator and a vehicle controller. The generation of a model velocity, based on ideal vehicle kinematics which include jerk and acceleration limiting, is examined with respect to the performance criteria required for safe operation. Using the phase-plane follower spacing policy, a vehicle controller is designed, evaluated, and implemented on an 8-bit microprocessor to control the vehicle through various maneuvers as simulated on an analog computer.
A hydrodynamic vehicle design analysis of a towed environmental sensing system was conducted. The primary thrust of the analysis was to determine the towed vehicle geometry and mass characteristics which best meet the...
A hydrodynamic vehicle design analysis of a towed environmental sensing system was conducted. The primary thrust of the analysis was to determine the towed vehicle geometry and mass characteristics which best meet the depth-keeping and stability requirements. The effect of the tow cable, depressor, and tow ship were also examined. The design requirements, initial vehicle geometry, the effects of geometry modifications, and the final vehicle geometry are presented. Longitudinal and lateral stability are presented as a function of geometry. Towed vehicle response is predicted for typical seaway and ship motion forcing functions, and the system tow performance is presented as a function of speed and depth.
This paper explores the concept of an underwater robot manipulator mounted on an unmanned submersible for the purpose of doing some undersea tasks of interest to the U.S. Navy. The robot concept is compared with other...
作者：
KOZLOVSKY, WILLIAM P.U.S.C.GLIEUTENANT COMMANDER WILLIAM P. KOZLOVSKY
U.S.C.G. graduated as top man of the U. S. Coast Guard Academy Class of 1954. He served as a deck watch officer and engineering watch officer aboard the CGC GRESHAM prior to departing for flight training in 1956. Upon completion of flight training he was selected as outstanding Student Seaplane Pilot for 1957 by CNATRA. While serving as a Coast Guard search and rescue pilot LCDR Kozlovsky completed aircraft maintenance officer training and was selected for post graduate work at Purdue University in 1962. While attending Purdue he earned a M.S. degree in Industrial Administration again finishing number one in his class. He was subsequently designated the first Krannert Scholar the highest honor Purdue can bestow upon a graduate student. Since 1963 LCDR Kozlovsky has been assigned to the Aeronautical Engineering Division Office of Engineering at U. S. Coast Guard Headquarters. Editor's Note: Further programs and detailed statistical analysis of computer output are available from the author on request.
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