1. Viswanathan, C. N., Longman, R. W., andLikins, P. W.,A Definition of Degree of Controllability—A Criterion for Actuator Placement, Proceedings of the 2nd VPISU Symposium on Dynamics and Control of Large Flexible Spacecraft, Blacksburg, Virginia, pp. 369–381, 1979.
2. Kim, Y., andJunkins, J. L.,Measure of Controllability for Actuator Placement, Journal of Guidance, Control, and Dynamics, Vol. 14, No. 5, pp. 895–902, 1991.
3. Hamdan, A. M. A., andNayfeh, A. H.,Measure of Controllability and Observability for First and Second Order Linear Systems, Journal of Guidance, Control, and Dynamics, Vol. 12, No. 3, pp. 421–428, 1989.
4. Skelton, R. E.,Dynamic System Control—Linear System Analysis and Synthesis, John Wiley and Sons, New York, New York, 1988.
5. Guangqian, X., andBainum, P. M.,Actuator Placement Using Degree of Controllability for Discrete-Time Systems, Journal of Dynamic Systems, Measurement, and Control, Vol. 114, No. 3, pp. 508–516, 1992.