A KINEMATICALLY-COUPLED MAGNETIC BEARING CALIBRATION FIXTURE

被引：7

作者：

POOVEY, T ^{[1
]}

HOLMES, M ^{[1
]}

TRUMPER, D ^{[1
]}

机构：

[1] UNIV N CAROLINA,PRECIS ENGN LAB,CHARLOTTE,NC 28223

来源：

PRECISION ENGINEERING-JOURNAL OF THE AMERICAN SOCIETY FOR PRECISION ENGINEERING | 1994年 / 16卷 / 02期

关键词：

FORCE TESTING; MAGNETIC BEARINGS; KINEMATIC COUPLINGS;

D O I：

10.1016/0141-6359(94)90194-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A calibration fixture has been developed that measures the force of an electromagnetic actuator as a function of coil current and target separation gap. The measured force characteristics are used to linearize the dynamics of magnetic bearings controlled by these actuators. The calibration fixture mechanical design and test procedure are described. An extremely stiff gothic arch ball-and-groove coupling fabricated from silicon carbide is used along with a lightweight target platen constructed from composite materials to place the resonant frequency of the calibration fixture at 1.8 kHz. This permits the characterization of magnetic bearing elements at frequencies up to 1 kHz. Experimental results from force testing a magnetic bearing element are presented along with the frequency response of the calibration fixture and suggestions for further research. We also present the design of an associated linear current amplifier designed specifically for low noise and a high negative current slew rate.

引用

页码：99 / 108

页数：10

共 9 条

[1]

Trumper, Queen, Precision magnetic suspension linear bearing, Presented at the NASA International Symposium on Magnetic Suspension Technology, (1991)

[2]

Trumper, Magnetic suspension techniques for precision motion control, Ph.D. thesis, (1990)

[3]

Poovey, A kinematically coupled magnetic bearing test fixture, Master's thesis, (1992)

[4]

Knight, Xia, McCaul, Forces in magnetic journal bearings: nonlinear computation and experimental measurement, Presented at the Third International Symposium on Magnetic Bearings, (1992)

[5]

Slocum, Donmez, Kinematic couplings for precision fixturing—Part 2: Experimental determination of repeatability and stiffness, Precision Eng., 10, pp. 115-122, (1988)

[6]

Pease, Troubleshooting Analog Circuits, (1991)

[7]

Trumper, Sanders, Nguyen, Queen, Experimental results in nonlinear compensation of a one degree-of-freedom magnetic suspension, presented at the NASA International Symposium on Magnetic Suspension Technology, (1991)

[8]

Slocum, Design of three-groove kinematic couplings, Precision Eng, 14, pp. 67-76, (1992)

[9]

Slocum, Precision Machine Design, pp. 231-233, (1992)

← 1 →