Switchless Control Strategies for Minimum Time Frequency Transitions in Phase-Locked Loops |
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Authors: | Rajasekaran PK Srinath MD |
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Institution: | Southern Methodist University Dallas, Tex. 75222; |
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Abstract: | The problem of minimum time frequency transitions in phase-locked loops with both phase and frequency controls applied is investigated using Pontryagin's maximum principle. Typically, a type II secondorder loop with a damping ratio of 0.707 subjected to a step change in the frequency of its input signal is considered and switchless control strategies that force the transients in the loop to settle down in minimum time are obtained. |
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