sysupdate

PURPOSE

SYNOPSIS

DESCRIPTION

% -*- texinfo -*-
% @deftypefn {Function File} {} sysupdate (@var{sys}, @var{opt})
% Update the internal representation of a system.
%
% @strong{Inputs}
% @table @var
% @item sys:
% system data structure
% @item opt
% string:
% @table @code
% @item 'tf'
% update transfer function form
% @item 'zp'
% update zero-pole form
% @item 'ss'
% update state space form
% @item 'all'
% all of the above
% @end table
% @end table
%
% @strong{Outputs}
% @table @var
% @item retsys
% Contains union of data in sys and requested data.
% If requested data in @var{sys} is already up to date then @var{retsys}=@var{sys}.
% @end table
%
% Conversion to @command{tf} or @command{zp} exits with an error if the system is
% mixed continuous/digital.
% @seealso{tf, ss, zp, sysout, sys2ss, sys2tf, sys2zp}
% @end deftypefn

CROSS-REFERENCE INFORMATION

• is_digital % Return nonzero if system is digital.
• is_siso % Returns nonzero if the system data structure
• ss % Create system structure from state-space data. May be continuous,
• ss2tf % Conversion from transfer function to state-space.
• ss2zp % Converts a state space representation to a set of poles and zeros;
• sysgettype % return the initial system type of the system
• tf % build system data structure from transfer function format data
• tf2ss % Conversion from transfer function to state-space.
• tf2zp % Converts transfer functions to poles-and-zero representations.
• zp % Create system data structure from zero-pole data.
• zp2ss % Conversion from zero / pole to state space.
• zp2tf % Converts zeros / poles to a transfer function.

• bddemo % Octave Controls toolbox demo: Block Diagram Manipulations demo.
• buildssic %
• c2d %
• ctrb % Build controllability matrix:
• d2c % Convert a discrete (sub)system into a purely continuous one.
• dcgain % Returns dc-gain matrix. If dc-gain is infinite
• dlqg % O B S O L E T E * * * D O N O T U S E~
• hinfnorm % Computes the
• is_controllable % Logical check for system controllability.
• is_stable % Returns 1 if the matrix @var{a} or the system @var{sys}
• lsim % Produce output for a linear simulation of a system; produces
• obsv % Build observability matrix:
• packedform
• place % Computes the matrix @var{K} such that if the state
• starp %
• sys2ss % Extract state space representation from system data structure.
• sys2tf % Extract transfer function data from a system data structure.
• sys2zp %@deftypefn {Function File} {[@var{zer}, @var{pol}, @var{k}, @var{tsam}, @var{inname}, @var{outname}] =} sys2zp (@var{sys})
• sysadd % returns @var{sys} = @var{gsys} + @var{hsys}.
• sysconnect % Close the loop from specified outputs to respective specified inputs
• syscont % Extract the purely continuous subsystem of an input system.
• sysdisc %
• sysdup % Duplicate specified input/output connections of a system
• sysgetsignals % Get signal names from a system
• sysgroup % Combines two systems into a single system.
• sysout % print out a system data structure in desired format
• sysrepdemo % Tutorial for the use of the system data structure functions.
• syssetsignals % change the names of selected inputs, outputs and states.
• syssub % Return @math{sys = Gsys - Hsys}.
• zp2ss % Conversion from zero / pole to state space.