The stability and control characteristics of submarines and other submerged vehicles can be determined by performing straightline and rotating arm captive-model experiments at the David Taylor Naval Ship R&D Center (DTNSRDC). From these experiments the hydrodynamic forces and moments are measured and the appropriate stability and control derivatives and hydrodynamic coefficients are determined. This information is used to evaluate the stability and control characteristics of the submarine, and to develop a mathematical model of the vehicle which is then employed in performing computer simulations of the motions of the vehicle. Vertical and horizontal plane Planar Motion Mechanism (PMM) experiments are performed in the straightline basin (usually Towing Carriage 2) to determine the static, and control derivatives, and the hydrodynamic force and moment coefficients associated with variations in angle of attack, angle of drift, and over and under propulsion. If the vehicle is symmetric (for example, a vehicle with a hull that is a body of revolution, fitted with four identical cruciform stern appendages), then only vertical plane experiments need to be performed. The hydrodynamic forces and moments are measured over a range of angles of attack (up to about 18 degrees) and sternplane angles in the vertical plane, and over a range of angles of drift and rudder angles in the horizontal plane.
Straightline and Rotating Arm Captive-Model Experiments to Investigate the Stability and Control Characteristics of Submarines and Other Submerged Vehicles
1987
9 pages
Report
Keine Angabe
Englisch
Marine Engineering , Fluid Mechanics , Laboratory & Test Facility Design & Operation , Submarine models , Captive tests , Hydrodynamics , Model basins , Angle of attack , Angles , Appendages , Bodies of revolution , Coefficients , Computerized simulation , Control , Cruciform configurations , Drift , Horizontal orientation , Hydrodynamic characteristics , Hydrodynamic control surfaces , Mathematical models , Moments , Motion , Marine rudders , Ship sterns , Stability , Static stability , Submarine hulls , Submarines , Underwater propulsion , Underwater vehicles , Vertical orientation , PMM(Planar Motion Mechanism) , Hydrodynamic forces , Hydrodynamic stability
STRAIGHTLINE CORNERING ON A CHASSIS DYNAMOMETER
British Library Conference Proceedings | 2007
|Interaction of Vehicle and Tire regarding Straightline Stability and Small Lateral Acceleration
British Library Conference Proceedings | 2007
|Engineering Index Backfile | 1910
|