acker algebraic loop append augstate balancing realizations balreal block diagram. See model building bode (Bode plots) bodemag (Bode magnitude plots) c2d cancellation canon canonical realizations care cell array chgunits companion realizations comparing models concatenation, model LTI arrays connect connect connection feedback parallel series continuous-time conversion to. See conversion, model random model controllability matrix (ctrb) staircase form conversion, model between model types continuous to discrete (c2d) discrete to continuous (d2c) with negative real poles resampling discrete models state-space, to covar covariance output state crossover frequencies allmargin margin ctrb ctrbf d2c d2d damp damping dare dcgain delay2z delays combining conversion delay2z existence of, test for hasdelay I/O input output Padé approximation time denominator common denominator property specification design Kalman estimator LQG LQG pole placement regulators regulators state estimator diagonal realizations digital filter specification Dirac impulse discrete-time models equivalent continuous poles frequency Kalman estimator random discrete-time random models discretization available methods dlqr dlyap drmodel drss dsort DSP convention dss dssdata esort estim estimator current discrete discrete for continuous plant evalfr feedback feedback algebraic loop negative positive filt filt filt first-order hold (FOH) frd FRD (frequency response data) objects data frdata frequencies units, conversion singular value plots frdata freqresp frequency crossover for discrete systems logarithmically spaced frequencies natural Nyquist frequency response at single frequency (evalfr) Bode plot discrete-time frequency freqresp magnitude MIMO Nichols chart (ngrid) Nichols plot Nyquist plot phase plotting singular value plot viewing the gain and phase margins gain low frequency (DC) state-feedback gain gain margins gensig get gram gramian (gram) Hamiltonian matrix and pencil hasdelay I/O delays dimensions impulse impulse response inheritance initial initial condition innovation input delays Dirac impulse names See also InputName See also InputName number of inputs pulse sine wave square wave interconnection. See model building inv inversion limitations isct isdt isempty isproper issiso kalman Kalman estimator current discrete innovation steady-state kalmd LFT (linear-fractional transformation) LQG (linear quadratic-gaussian) method continuous LQ regulator cost function current regulator discrete LQ regulator Kalman state estimator LQ-optimal gain optimal state-feedback gain regulator lqr lqrd lqry lsim LTI arrays building concatenation shape, changing stack LTI models comparing multiple models dimensions discrete discrete random empty frd model order reduction model order reduction (balanced realization) ndims norms proper transfer function random second-order SISO ss zpk LTI properties accessing property values (get) admissible values displaying properties inheritance property names property names property values property values setting LTI Viewer ltiview lyap Lyapunov equation Lyapunov equation continuous discrete margin margins, gain and phase matched pole-zero MIMO minreal model building appending LTI models feedback connection modeling block diagrams (connect) parallel connection series connection model order reduction balanced realization modred natural frequency ndims ngrid Nichols chart plot (nichols) nichols noise measurement process white norm norms of LTI systems (norm) numerator property specification value Nyquist frequency plot (nyquist) nyquist observability matrix (ctrb) staircase form obsv obsvf operations on LTI models append augmenting state with outputs diagonal building inversion sorting the poles ord2 output covariance delays names names. See also OutputName number of outputs pade Padé approximation (pade) parallel parallel connection phase margins place plotting multiple systems Nichols chart (ngrid) s-plane grid (sgrid) z-plane grid (zgrid) pole pole placement poles computing damping equivalent continuous poles multiple natural frequency pole-zero map sorting by magnitude (dsort) s-plane grid (sgrid) z-plane grid (zgrid) pole-zero cancellation map (pzmap) proper transfer function pulse pzmap random models realization state coordinate transformation state coordinate transformation (canonical) realizations balanced canonical companion form minimal modal form reduced-order models balanced realization regulation resampling (d2d) reshape Riccati equation continuous (care) discrete (dare) for LQG design -like stabilizing solution rlocus rmodel root locus plot (rlocus) rss sample time resampling setting unspecified second-order model series series connection set simulation of linear systems. See time response sine wave singular value plot (bode) SISO SISO Design Tool square wave ss stability margins margin pole pzmap stabilizable stabilizing, Riccati equation stack state augmenting with outputs covariance discrete estimator estimator feedback names number of states transformation transformation (canonical) uncontrollable unobservable unobservable state-space models balancing descriptor descriptor discrete random discrete-time models dss initial condition response quick data retrieval (dssdata) random continuous-time realizations specification ss step response Sylvester equation symplectic pencil tf time response final time impulse response (impulse) initial condition response (initial) MIMO response to arbitrary inputs (lsim) step response (step) to white noise totaldelay transfer functions common denominator discrete-time discrete-time random DSP convention filt MIMO quick data retrieval (tfdata) random specification static gain tf transmission zeros. See zeros triangle approximation Tustin approximation with frequency prewarping tzero. See zero zero zero-order hold (ZOH) zero-pole-gain (ZPK) models MIMO quick data retrieval (zpkdata) specification static gain zpk zeros computing pole-zero map transmission zpk