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Developing a hot-water drill system for the WISSARD project: 3. Instrumentation and control systems

  • Justin Burnett (a1), Frank R. Rack (a1), Daren Blythe (a1), Pat Swanson (a2), Dennis Duling (a1), Dar Gibson (a1), Chad Carpenter (a1), Graham Roberts (a1), Jeff Lemery (a1), Steve Fischbein (a1) and Adam Melby (a2)...

Abstract

The WISSARD (Whillans Ice Stream Subglacial Access Research Drilling) traversable hot-water drill system was designed to create various-diameter ice boreholes to a depth of >800 m, with most major components being controllable from a single user interface. The drill control system operates four low-pressure pumps for water generation and circulation, two hot-water generation units containing a total of six diesel burner modules with integrated high-pressure pumps, three winches (one with independent level-wind motor), a four-motor linear traction drive, and a large number of analog and digital sensors to monitor system performance and cleanliness. Due to development time constraints the control system design focused on utilizing commercial off-the-shelf components, while being highly modular, easily expandable and rapidly deployable. Additional emphasis was placed on providing redundant manual operator controls and maintaining a low degree of system automation to avoid dependence on software control loops for first-season deployment. The result of this design paradigm was a control system that was taken from concept to full operation in <6 months, successfully performing in the field without insurmountable problems.

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References

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Benson, T and 9 others (2014) IceCube Enhanced Hot Water Drill functional description. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A032) (see paper in this issue)
Blythe, DS, Duling , DV and Gibson, DE (2014) Developingahot-water drill system for the WISSARD project: 2. In situ water production. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A037) (see paper in this issue)
Piggin, R (2006) Ethernet/IP – control in real time. Comput. Control Eng. J., 17(6), 2831
Rack, FR and 8 others (2014) Developing a hot-water drill system for the WISSARD project: 1. Basic drill system components and design. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A031) (see paper in this issue)
Verma, V, Chakraborty, C, Maiti, S and Hori, Y (2013) Speed sensorless vector controlled induction motor drive using single current sensor. IEEE Trans. Energy Convers., 28(4), 938950 (doi: 10.1109/TEC.2013.2273935)

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