Scilab 5.5.2
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- CACSD (Computer Aided Control Systems Design)
- Formal representations and conversions
- Plot and display
- abinv
- arhnk
- arl2
- arma
- arma2p
- arma2ss
- armac
- armax
- armax1
- arsimul
- augment
- balreal
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- cainv
- calfrq
- canon
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- cls2dls
- colinout
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- contr
- contrss
- copfac
- csim
- ctr_gram
- damp
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- ddp
- dhinf
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- dscr
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- dt_ility
- dtsi
- equil
- equil1
- feedback
- findABCD
- findAC
- findBD
- findBDK
- findR
- findx0BD
- flts
- fourplan
- freq
- freson
- fspec
- fspecg
- fstabst
- g_margin
- gamitg
- gcare
- gfare
- gfrancis
- gtild
- h2norm
- h_cl
- h_inf
- h_inf_st
- h_norm
- hankelsv
- hinf
- imrep2ss
- inistate
- invsyslin
- kpure
- krac2
- lcf
- leqr
- lft
- lin
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- linfn
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- lqe
- lqg
- lqg2stan
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- lqr
- ltitr
- macglov
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- narsimul
- nehari
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- nyquistfrequencybounds
- obs_gram
- obscont
- observer
- obsv_mat
- obsvss
- p_margin
- parrot
- pfss
- phasemag
- plzr
- pol2des
- ppol
- prbs_a
- projsl
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- ric_desc
- ricc
- riccati
- routh_t
- rowinout
- rowregul
- rtitr
- sensi
- sident
- sorder
- specfact
- ssprint
- st_ility
- stabil
- sysfact
- syslin
- syssize
- time_id
- trzeros
- ui_observer
- unobs
- zeropen
Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
See the recommended documentation of this function
fspec
spectral factorization of continuous time dynamical systems
Calling Sequence
gm=fspec(g)
Arguments
- g
a continuous time linear dynamical system.
- gm
a continuous time linear dynamical system.
Description
returns gm
with gm
and gm^-1
stable such that:
g = gtild(gm)*gm
gtild(gm) returns a state-space representation of gm(-s)'.
g
is inversible.
Imaginary-axis poles are forbidden.
gtild(g)=g (poles and zeros of g are symetric wrt imaginary axis).
g(inf) is positive definite.
Examples
a=-1000; b=5; c=5; d=5; sl=syslin('c',a,b,c,d); fspec(sl)
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