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Goniometric motion controller for the superconducting coil in a magnetic stereotaxis system
E G Quate1, K G Wika, M A Lawson
1Department of Nuclear Engineering, University of Virginia, Charlottesville 22901.
IEEE Transactions on Bio-Medical Engineering
|September 1, 1991
Summary
A novel four degree-of-freedom goniometer precisely positions superconducting coils for magnetic stereotaxis systems. This computer-controlled device ensures stability and minimizes field distortion for advanced medical applications.
Area of Science:
- Medical Devices
- Robotics and Control Systems
- Superconducting Magnet Technology
Background:
- Magnetic stereotaxis systems require precise positioning of heavy superconducting coils.
- Developmental versions necessitate robust and stable positioning mechanisms.
- Minimizing magnetic field distortion is critical for accuracy.
Purpose of the Study:
- To design, build, and test a four degree-of-freedom goniometer for positioning an 80 kg, 2 T superconducting coil/cryostat.
- To enable computer-controlled movement of the coil for magnetic stereotaxis applications.
- To present design principles, construction details, and performance analysis of the goniometer.
Main Methods:
- Designed a four degree-of-freedom goniometer with computer-controlled stepping motor actuators.
- Integrated counterweights and counterbalances for stability and reduced size/weight.
- Utilized nonmagnetic materials, primarily aluminum, to minimize field distortion.
Main Results:
- Successfully designed, built, and tested the goniometer system.
- Achieved stable static and dynamic operation through counterweight integration.
- Minimized magnetic field distortion by employing nonmagnetic structural components.
Conclusions:
- The developed goniometer provides precise positioning for superconducting coils in magnetic stereotaxis.
- The design balances stability, size, and minimal field interference.
- This technology supports strategies for precision magnetic stereotaxis procedures.