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2
Operations on LTI Models
IPrecedence and Property Inheritance . . . . . . . . 2-3
Extracting and Modifying Subsystems . .
Referencing FRD Models Through Frequencies
Referencing Channels by Name . . . . . . .
Resizing LTI Systems . . . . . . . . . . .
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Arithmetic Operations . . .
Addition and Subtraction . . .
Multiplication . . . . . . . .
Inversion and Related Operations
Transposition . . . . . . . .
Pertransposition . . . . . . .
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. 2-11
. 2-11
. 2-13
. 2-13
. 2-14
. 2-14
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2-5
2-7
2-8
2-9
Model Interconnection Functions . . . . . . . . . . 2-16
Concatenation of LTI Models . . . . . . . . . . . . . . 2-16
Feedback and Other Interconnection Functions . . . . . . 2-18
Continuous/Discrete Conversions of LTI Models
Zero-Order Hold . . . . . . . . . . . . . . . .
First-Order Hold . . . . . . . . . . . . . . . .
Tustin Approximation . . . . . . . . . . . . . .
Tustin with Frequency Prewarping . . . . . . . .
Matched Poles and Zeros . . . . . . . . . . . .
Discretization of Systems with Delays . . . . . . .
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. 2-20
. 2-20
. 2-22
. 2-22
. 2-23
. 2-23
. 2-23
Resampling of Discrete-Time Models . . . . . . . . . 2-26
References . . . . . . . . . . . . . . . . . . . . . 2-27