Lecture 9 – Modeling, Simulation, and Systems Engineering

Lecture 9 ¨C Modeling, Simulation, and

Systems Engineering

?

?

?

?

Development steps

Model-based control engineering

Modeling and simulation

Systems platform: hardware, systems software.

EE392m - Spring 2005

Gorinevsky

Control Engineering

9-1

Control Engineering Technology

? Science

¨C abstraction

¨C concepts

¨C simplified models

? Engineering

¨C building new things

¨C constrained resources: time, money,

? Technology

¨C repeatable processes

? Control platform technology

? Control engineering technology

EE392m - Spring 2005

Gorinevsky

Control Engineering

9-2

Controls development cycle

? Analysis and modeling

¨C Control algorithm design using a simplified model

¨C System trade study - defines overall system design

? Simulation

¨C Detailed model: physics, or empirical, or data driven

¨C Design validation using detailed performance model

? System development

¨C Control application software

¨C Real-time software platform

¨C Hardware platform

? Validation and verification

¨C Performance against initial specs

¨C Software verification

¨C Certification/commissioning

EE392m - Spring 2005

Gorinevsky

Control Engineering

9-3

Algorithms/Analysis

Much more than real-time control feedback computations

? modeling

? identification

? tuning

? optimization

? feedforward

? feedback

? estimation and navigation

? user interface

? diagnostics and system self-test

? system level logic, mode change

EE392m - Spring 2005

Gorinevsky

Control Engineering

9-4

System and software

Controls analysis

Model-based Control Development

Conceptual

Analysis

Application

code: Simulink

Control design model:

x(t+1) = x(t) + u(t)

Detailed simulation

model

Validation and

verification

Hardware-in-theloop sim

Deployment

Physical plant

EE392m - Spring 2005

Gorinevsky

Control Engineering

Conceptual control

algorithm:

u = -k(x-xd)

Detailed control application:

saturation, initialization, BIT,

fault recovery, bumpless transfer

Systems platform:

Prototype

controller

Run-time code, OS

Hardware platform

Deployed

controller

9-5

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