User`s guide
Table Of Contents
- Preface
- Quick Start
- LTI Models
- Introduction
- Creating LTI Models
- LTI Properties
- Model Conversion
- Time Delays
- Simulink Block for LTI Systems
- References
- Operations on LTI Models
- Arrays of LTI Models
- Model Analysis Tools
- The LTI Viewer
- Introduction
- Getting Started Using the LTI Viewer: An Example
- The LTI Viewer Menus
- The Right-Click Menus
- The LTI Viewer Tools Menu
- Simulink LTI Viewer
- Control Design Tools
- The Root Locus Design GUI
- Introduction
- A Servomechanism Example
- Controller Design Using the Root Locus Design GUI
- Additional Root Locus Design GUI Features
- References
- Design Case Studies
- Reliable Computations
- Reference
- Category Tables
- acker
- append
- augstate
- balreal
- bode
- c2d
- canon
- care
- chgunits
- connect
- covar
- ctrb
- ctrbf
- d2c
- d2d
- damp
- dare
- dcgain
- delay2z
- dlqr
- dlyap
- drmodel, drss
- dsort
- dss
- dssdata
- esort
- estim
- evalfr
- feedback
- filt
- frd
- frdata
- freqresp
- gensig
- get
- gram
- hasdelay
- impulse
- initial
- inv
- isct, isdt
- isempty
- isproper
- issiso
- kalman
- kalmd
- lft
- lqgreg
- lqr
- lqrd
- lqry
- lsim
- ltiview
- lyap
- margin
- minreal
- modred
- ndims
- ngrid
- nichols
- norm
- nyquist
- obsv
- obsvf
- ord2
- pade
- parallel
- place
- pole
- pzmap
- reg
- reshape
- rlocfind
- rlocus
- rltool
- rmodel, rss
- series
- set
- sgrid
- sigma
- size
- sminreal
- ss
- ss2ss
- ssbal
- ssdata
- stack
- step
- tf
- tfdata
- totaldelay
- zero
- zgrid
- zpk
- zpkdata
- Index

2 LTI Models
2-32
where the string PropertyName is ei ther the full pr o pe r ty name, or a ny
abbreviatio n wi th enoug h charact ers to i denti fy the pr opert y uniq uel y. For
example, typing
h = tf(100,[1 5 100],'inputname','voltage',...
'outputn','current',...
'notes','A simple circuit')
get(h,'notes')
produces
ans =
'A simple circuit'
To display all of the properties of an LTI model sys (and their values), use the
syntax
get(sys). In this example,
get(h)
produces
num: {[0 0 100]}
den: {[1 5 100]}
Variable: 's'
Ts: 0
InputDelay: 0
OutputDelay: 0
ioDelayMatrix: 0
InputName: {'voltage'}
OutputName: {'current'}
InputGroup: {0x2 cell}
OutputGroup: {0x2 cell}
Notes: {'A simple circuit'}
UserData: []
Noticethat default(output) values havebeen assignedto any LTI propertiesin
this list that you have not specified.
Finally, you can also access property values using direct structure-like
referencing. This topic is explained in the next section.