Accession Number:

ADA390571

Title:

MicroAUV - MEMS Report

Descriptive Note:

Technical rept. 15 Feb-24 May 2001

Corporate Author:

UNMANNED SYSTEMS TECHNOLOGY LAB INC (USTLAB) POST FALLS ID

Personal Author(s):

Report Date:

2001-05-01

Pagination or Media Count:

152.0

Abstract:

This Microminiature Autonomous Underwater Vehicle MicroAUV Project pursues a viable design of a very small AUV. Current MEMS industry miniaturization of electronics enables a Clean Sheet design of an underwater vehicle that could achieve an order of magnitude improvement in specific endurance range per pound mass of vehicle over currently fielded systems. Specifically, the authors target a 2-15 lb MicroAUV that can demonstrate a 20 nautical mile per pound mass specific range capability. The design includes a 20 payload fraction in weight andor volume and a 10 margin for payload power. MicroAUV shall provide the capability and endurance of other vehicles currently in the fleet and between 80 200 lbm displacement. An initial report was provided to underscore the scope of possibility within the opportunity described above. This report summarizes results obtained in the previous report, and discusses work this period. This report captures the mass, volume, and power budgets of the components that provide the functional make up of MicroAUV, as well as the analysis of performance efficiencies and possible margins depending on vehicle geometric design and propulsive system. In the previous report, the authors documented the viability of an 8 lbm MicroAUV with a net specific endurance capability of between 3 and 15 Nautical miles per pound mass, depending on operating profile and design margin resolutions. This report expands on the analyses and narrows the focus of the right sized vehicle. The authors pose that the physics of the small provides the possibility of a unique opportunity to improve endurance. Specifically, the analyses completed herein id the possibility of a sweet spot of vehicle hull diameter, length, shape and prismatic coefficient, wherein at low Reynolds Number 10exp 4-10exp 5 flow, a minimum hydrodynamic drag might be achievable.

Subject Categories:

  • Electrical and Electronic Equipment
  • Submarine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE