13 - SISODesignLimitations13 filled

13 - SISODesignLimitations13 filled - ME575 Handouts SISO...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ME575 Handouts 1 ME575 Session 13 – Design Limitations School of Mechanical Engineering Purdue University Slide 1 SISO DESIGN LIMITATIONS SISO DESIGN LIMITATIONS Fundamental Design Trade Fundamental Design Trade -offs offs Limitations due to Physical Components Limitations due to Physical Components – Sensors (e.g., locations, accuracy, response time) Sensors (e.g., locations, accuracy, response time) – Actuators (e.g., magnitude and rate saturation, resolution) Actuators (e.g., magnitude and rate saturation, resolution) Effect of Modeling Errors Effect of Modeling Errors Fundamental Structural Limitations Fundamental Structural Limitations – Poles in open right half plane (ORHP) or Unstable Poles Poles in open right half plane (ORHP) or Unstable Poles – Zeros in ORHP or Unstable Zeros Zeros in ORHP or Unstable Zeros – Stable Zeros but close to Origin Stable Zeros but close to Origin – Poles on Imaginary Axis Poles on Imaginary Axis – Zeros on Imaginary Axis Zeros on Imaginary Axis ME575 Session 13 – Design Limitations School of Mechanical Engineering Purdue University Slide 2 Common Controller Design Issues Common Controller Design Issues Closed Closed -Loop Performance Specifications Loop Performance Specifications Command Following Command Following Response speed, Steady -state error, state error, Disturbance Attenuation Properties Disturbance Attenuation Properties Rejection of disturbance at steady -state, transient speed, state, transient speed, Practical Practical Realizability Realizability Achievable control amplitude & control rate changes, Achievable control amplitude & control rate changes, Transient Response Quality Overshoot, if the system is open Overshoot, if the system is open -loop unstable loop unstable Undershoot, if the system is non -minimum phase minimum phase Sensitivity of Design to Modeling Errors Sensitivity of Design to Modeling Errors Practical Issues Practical Issues Various aspects of performance cannot be addressed independently Various aspects of performance cannot be addressed independently via SISO design SISO design Must have a thorough understanding of Must have a thorough understanding of fundamental SISO design fundamental SISO design
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

13 - SISODesignLimitations13 filled - ME575 Handouts SISO...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online