The acceleration error constant, often denoted as $$K_a$$, quantifies the steady-state error of a control system in response to a ramp input signal. It is a critical parameter that helps evaluate how well a system can track changes in inputs over time, particularly under conditions where the input is accelerating. This constant ties directly into understanding the system's steady-state behavior and its time-domain performance specifications, showcasing the relationship between input acceleration and resulting output error.
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