ECE :: Automatic Control Systems
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The phase difference (jω - p1) means
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For type 0 system the starting point (i.e. ω = 0) of polar plot is finite and is on positive real axis.
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Which control action can never be used alone?
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If G(s)H(s) = K (T1s + 1)/[s2 (T2s + 1)] the system stability depended an relative magnitudes of T1 and T2.
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In a simple on-off controller with differential gap, the magnitude of differential gap determines
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If the Nyquist plot encircles the (-1 + j0) point clockwise once or more number of times, the system is unstable.
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In an armature controlled dc motor let J be equivalent moment of inertia of motor and load, f0 be equivalent viscous friction coefficient of motor and load and θ be angular displacement of motor shaft. Then torque equation is