ECIV 360 Chapter 3A Linear Control Systems

ECIV 360 Chapter 3A Linear Control Systems - Part 2 Linear...

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1 ECIV 360 Civil Engineering Systems Prof. Bill X. Yu Spring, 2009 Part 2 Linear Control Systems Requirements Preliminary background on active and passive control system Overview on the principles of linear control system Linear System Properties of Physical Systems Causality Linearity Time Invariant Stability Invertibility Linear Time Invariant (LTI) System Linear and time-invariant Preserves statistics of input onto the output signal Determination of LTI system Input with known statistics, measure the output signal and compute the statistics Introduction: Modern Control Theory for Linear Systems with time-invariant parameters
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2 Needs Environmental loads Wind Earthquake Waves Structural resistance (traditionally) Mass Solidity Needs (cont.) Increased flexibility Human comfort and safety Increased safety levels Tall structures, deep water offshore platforms, nuclear power plants Failure means disaster Increasingly stringent performance requirements Traditional structures: allow deform or sustain local damage if necessary Trend: operate within strict performance guidelines
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ECIV 360 Chapter 3A Linear Control Systems - Part 2 Linear...

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