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Unformatted text preview: 2.2 Introduction to block diagrams • Block diagram : a shorthand pictorial representation of the relationship between input signal and output signal . May also include a reference signal . • Element : a system component, which has a transfer function that relates the output to the input, i.e. out = G(in). • Summing point : point in the information flow between elements flow where two or more signals are added or subtracted. Similarly, a splitting point is a point where signal is transmitted identically as the input to two other elements. • Feedback : a signal determined by the output, as modified by the feedback elements, used in comparison with the input signal. • Error Signal (e) : the algebraic sum of the reference input and the feedback. • Feedback Elements : those components required to establish the desired feedback signal by sensing the controlled output. • An open-loop system does not monitor its own output, i.e., it contains no feedback loop. A simple open-loop system is strictly an input through a control element. In thisloop....
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- Fall '09
- Signal-to-noise ratio, Cybernetics, Kam Kmo Ksp, KF B Kam Kmo Ksp