Question

Exercise 5 (20pts The frequency response data of a system's open loop is shown in the following table. Using interpolation, estimate the phase crossover frequency o o estimate the gain crossover frequency Deduce the gain at the phase crossover frequency Deduce the phase at the gain crossover frequency Is the system stable? By how many degrees can the phase angle be increased for the system to become unstable? . . . * Phase angle Frequency Magnitude (dB) Gain degrees 90.6875 47.9583 41.2900 34.6157 27.9138 21.0870 13.7409 4.7782 0.1000 0.2154 0.4942 1.0000 249.9870 91.4811 93.1894 116.0117 53.8006 24.8710 11.3332 4.8645 1.7334 0.4487 0.0832 00111 96.8564 104.6254 2.1544 120.2025 146.3099 4.6416 10.0000 21.5443 46.4159 100.0000 178.4118 0.3613118 -210.7129 237.7244 21.6042 39.0741

Answer 1

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