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stem/Signal Proc/System Classes.md
Andy Pack f29c435494 vault backup: 2023-12-27 22:38:55 
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STEM/Signal Proc/System Classes.md
STEM/Signal Proc/Transfer Function.md
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tags
signals

Dynamic vs Algebraic

  • Dynamic system has "memory", output depends on present and past
    • Includes diff and/or integral operators with initial conditions
    • Cap and or inducer
  • Algebraic
    • No calculus operators
    • Output depends only on input

Time Invariant vs Time-Varying

Continuous vs Discrete time

Linear vs Non-Linear

Deterministic vs Stochastic

  • Deterministic
    • Output fully determined by parameter inputs
  • Stochastic
    • Include randomness
      • Noise/Disturbance
    • Same inputs can lead to different outputs

Lumped vs Distributed parameters

  • Lumped
    • Only one independent variable (time t)
    • Typical for electrical systems
    • x(t)
    • Ordinary differential equations
  • Distributed
    • Several independent variables
      • time, pressure, temperature
    • Typical for chemical processes and process control -x(t, P, T)
    • Differential partial equations

Causal vs Non-Causal

  • Causal
    • Output depends only on current and past values
  • Non-Causal
    • Output depends on future inputs

SISO vs MIMO

  • Single Input/Single Output
  • Multiple Input/Multiple Output