Model-oriented design of a linear astatic phase-locked loop frequency synthesizer

In conclusion, we note that we propose a technique for parametric synthesis of linear phase-astatic phase-locked systems with complex LPF of high order. To do this, MatLab developed a program and considered the application LPF types of LCR, Bessel, Butterworth, Chebyshev and elliptic. To solve the problem, it is suggested to use the builtin functions MatLab pidtune and systune. Using systune the objective function is chosen TuningGoal.StepTracking and TuningGoal.Transient. As a reference system, we used a system with second -order astatism having a logarithmic amplitude -frequency characteristic of the type 2-1-2 [2]. An example of parametric synthesis PLI
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with LPF Butterworth of the third order.