THE EFFECT OF A PURE TIME DELAY ON THE STABILITY OF A PHASE-LOCK LOOP.
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS ANTENNA LAB
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The report discusses the effect of transport lag or pure time delay in the feedback loop of a phase-lock control system. The system analyzed is that which controls the relative phases of several transmitters to provide a coherent signal at a satellite. The report first derives the equation of the control loop, linearizes the resulting differential-difference equation, considers the loop to have unity compensation, and proceeds to discuss the solution. The results of this analysis are that, for stable operation, the loop gain may not exceed pi2T for a time delay of T seconds, which results in a steady-state phase error of 2 omegaoTpi. Author
- Electrical and Electronic Equipment
- Radio Communications