How would electrical loading be affected in this application

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Reference no: EM131200041

(a) Explain why mechanical loading error due to tachometer inertia can be significantly higher when measuring transient speeds than when measuring constant speeds.

(b) A dc tachometer has an equivalent resistance R_a = 20 Ω in its rotor windings. In a position plus velocity servo system, the tachometer signal is connected to a feedback control circuit with an equivalent resistance of 2 kΩ. Estimate the percentage error due to electrical loading of the tachometer at steady state.

Reference no: EM131200041

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