Design and Manufacturing of a Variable Speed Control Moment Gyro for an Agile Micro-Satellite Attitude Control Simulator

Aghalari, Ali Reza; Kalhor, Ahmad; Shamim, Farhad

Authors

¹ Aerospace University Complex, Malek Ashtar University of Technology, Tehran, Iran

² Faculty of Modern Sciences and Technologies, University of Tehran, Tehran, Iran

Abstract

In this paper, a designing procedure of a Variable Speed Control Moment Gyro (VSCMG) for performing an agile maneuver in an attitude control simulator is described, then a prototype is fabricated and finally the test results are presented. The design of actuator mechanism is based on simulator limitations (power consumption, dimensions and weight, simplicity) and direction of produced torque.Two DC electrical motors are used for controlling the angular velocity of flywheel and the gimbal slew rate. The motors controller and driver units are designed and implemented, so that the maximum accuracy, minimum errors and best response time could be accessible. Structural Design is based on strength, stiffness, volume and weightalso Necessary analysis are performed using ANSYS. Finally the functional tests of actuator such as measuring the produced torque (using simulator and load transducer), accuracy of gimbal position and gimbal slew rate, accuracy of flywheel rotational speed and power consumption are performed and then the results are presented.

Keywords

References

[1] Berner, R., Control Moment Gyro Actuator for Small Satellite Application, (M.Sc. Thesis), University of Stellen Bosch, 2005.

[2] Skelton, C. E., Mixed Control Moment Gyro and Momentum Wheel Attitude Control Strategies, (M. Sc. Thesis), Virginia Polytechnic Institute and State University, 2003.

[3] Yoon, H., Spacecraft Attitude and Power Control Using Variable Speed Control Moment Gyros, (PhD Thesis), Georgia Institute of Technology, 2004.

[4] Lappas, V. J., Steyn, W. H. and Underwood, C. I., “Experimental Testing of a CMG Cluster for Agil Microsatellites,” IEEE 11th Mediterraneam Conference on Control and Automation, Rhodes, Greece, 2003.

[5] Lappas, V. J., Steyn, W. H. and Underwood, C. I., “Attitude Control of Small Satellites using Control Moment Gyros,” 52nd IAF Congress, Toulouse, France, 2001.

[6] Lappas, V. J. and et.al., “Design, Analysis and In-orbit Performance of the BILSAT-1 Microsatellite Twin Control Moment Gyroscope Experimental Cluster”, 55th International Astronautical Congress, Vancouver, Canada, 2004.

[7] Aghalari, A. and et al., “Designing, Testing and Evaluation of Single Gimbal Control Moment Gyro for Microsatellite,” Journal of Space Science and Technology, Vol. 2, No. 3, 1388, pp.13-23 (In Persian).

[8] Aghalari, A., Studyon Satellite Simulators, Designing and Fabrication of A Single Gimbal Control Moment Gyro for Simulator, Technical Report, Aerospace University Complex, 1389 (In Persian).

[9] Aghalari, A. and Kalhor, A., Designing and Fabrication of a Variable Speed Control Moment Gyro, Technical Report, Aerospace University Complex, 1390 (In Persian).

[10] Kalhor, A. and Cheheltani, S. H., Designing and Integration of Electronics and Computer Parts of Satellite Simulator With Single Gimbal Control Moment Gyros, Technical Report, Aerospace University Complex, 1390 (In Persian).

[11] Available, [on line]: www.avagotech.com, Access Date: 2012.

Design and Manufacturing of a Variable Speed Control Moment Gyro for an Agile Micro-Satellite Attitude Control Simulator

References

References

Volume 8, Issue 1 - Serial Number 22April 2015Pages 73-77

Volume 8, Issue 1 - Serial Number 22
April 2015
Pages 73-77