Transfer Functions

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92 CHAPTER 6. TRANSFER FUNCTIONS Frequency response was one of the key ideas that formed the foundation of control. The response of linear systems to sinusoids was discussed in Section 2.3, see Equation (2.22). Consider a linear input/output system dny dtn +a1 dn¡1y dtn¡1 +:::+any= b1 dn¡1u dtn¡1 +b2 dn¡2u dtn¡2 +:::+bnu; (6.1)

  Response, Functions, Frequency, Functions frequency response