An Experimental Study of the Response of Small Tunnel Thrusters to Triangular and Square Wave Inputs

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Abstract:

The response of small tunnel thrusters to triangular and square wave changes in applied voltages to the thruster motor is studied. Previous mathematical models have attempted to identify the dynamic characteristics in thruster responses in order to minimize limit cycling in underwater vehicle position control. These experiments validate the effect of fluid inertia in the tunnel for long and shorter period commands. Additionally, the presence of a transient lag between changes in propeller speed and affected water column velocity has been identified which delays and reduces the transient peak thrust for shorter period triangular waves and square wave input signals.

Author(s):
Cody, Steven E.
Author Organization(s):
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Descriptive Note:
Master's thesis
Pagination:
0116

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
NPS
 Subject Terms
Joint Capability Areas:
JCA_3_Force Application; JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_3.1.1_Maneuver to Engage; JCA_3.1_Maneuver; JCA_1_Force Support; JCA_4.6_Engineering; JCA_1.2.7_Experimentation; JCA_5_Command and Control; JCA_1.3_Human Capital Management; JCA_3.2_Engagement; JCA_1.2_Force Preparation; JCA_3.2.1_Kinetic Means; JCA_5.3_Planning; JCA_6.1_Information Transport; JCA_6_Net Centric; JCA_1.3.2_Personnel Management
Modernization Areas:
Autonomy
Communities of Interest:
Autonomy
Descriptor(s):
*UNDERWATER VEHICLES, *DYNAMIC RESPONSE, *AUTONOMOUS NAVIGATION, *MARINE PROPELLERS, *THRUSTERS, VELOCITY, MATHEMATICAL MODELS, INPUT, DYNAMICS, VOLTAGE, SIGNALS, FLUIDS, SQUARE WAVES, UNDERWATER, THRUST, MOTORS, DELAY, TUNNELS, THESES, WATER, INERTIA, TRANSIENTS, EXPERIMENTAL DATA
Field(s)/Group(s):
Marine Engineering, Underwater and Marine Navigation and Guidance
Report Date:
1992 Dec 01