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Title: Automatic control of oscillatory penetration apparatus

A system and method for controlling an oscillatory penetration apparatus. An embodiment is a system and method for controlling a sonic drill having a displacement and an operating range and operating at a phase difference, said sonic drill comprising a push-pull piston and eccentrics, said method comprising: operating the push-pull piston at an initial push-pull force while the eccentrics are operated at a plurality of different operating frequencies within the operating range of the sonic drill and measuring the displacement at each operating frequency; determining an efficient operating frequency for the material being drilled and operating the eccentrics at said efficient operating frequency; determining the phase difference at which the sonic drill is operating; and if the phase difference is not substantially equal to minus ninety degrees, operating the push-pull piston at another push-pull force.
Authors:
Publication Date:
OSTI Identifier:
1167031
Report Number(s):
8,925,648
12/736,742
DOE Contract Number:
FG02-06ER84618
Resource Type:
Patent
Resource Relation:
Patent File Date: 2009 May 26
Research Org:
U.S. Department of Energy, Washington, D.C. (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING