This completes the design method begun in the part published in the previous issue by providing loci of the corrected open loop poles required for the selected systems. Two examples are given to illustrate the new approach to performance limitations and correction methods. Pole relocation by cancellation is advocated and the consequences of inexact cancellation are discussed.
The mathematics used in the program for the loci is given in two Appendices.
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References
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WilsonD R. ‘Modern Practice in Servo Design’, Pergamon, 1970, p 71.
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TruxallJ F. ‘Control System Synthesis’, McGraw-Hill, 1955, pp 303–305.
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ArchboldJ W. ‘Algebra’, Pitman, 1961, pp. 174–175.
