blockident.m

realize analysis and design for computer-controlled system

function [ret,x0,str,ts,xts]=blockident(t,x,u,flag);
%BLOCKIDENT	is the M-file description of the SIMULINK system named BLOCKIDENT.
%	The block-diagram can be displayed by typing: BLOCKIDENT.
%
%	SYS=BLOCKIDENT(T,X,U,FLAG) returns depending on FLAG certain
%	system values given time point, T, current state vector, X,
%	and input vector, U.
%	FLAG is used to indicate the type of output to be returned in SYS.
%
%	Setting FLAG=1 causes BLOCKIDENT to return state derivatives, FLAG=2
%	discrete states, FLAG=3 system outputs and FLAG=4 next sample
%	time. For more information and other options see SFUNC.
%
%	Calling BLOCKIDENT with a FLAG of zero:
%	[SIZES]=BLOCKIDENT([],[],[],0),  returns a vector, SIZES, which
%	contains the sizes of the state vector and other parameters.
%		SIZES(1) number of states
%		SIZES(2) number of discrete states
%		SIZES(3) number of outputs
%		SIZES(4) number of inputs
%		SIZES(5) number of roots (currently unsupported)
%		SIZES(6) direct feedthrough flag
%		SIZES(7) number of sample times
%
%	For the definition of other parameters in SIZES, see SFUNC.
%	See also, TRIM, LINMOD, LINSIM, EULER, RK23, RK45, ADAMS, GEAR.

% Note: This M-file is only used for saving graphical information;
%       after the model is loaded into memory an internal model
%       representation is used.

% the system will take on the name of this mfile:
sys = mfilename;
new_system(sys)
simver(1.3)
if (0 == (nargin + nargout))
     set_param(sys,'Location',[515,572,1015,872])
     open_system(sys)
end;
set_param(sys,'algorithm',     'RK-45')
set_param(sys,'Start time',    '0.0')
set_param(sys,'Stop time',     '999999')
set_param(sys,'Min step size', '0.0001')
set_param(sys,'Max step size', '10')
set_param(sys,'Relative error','1e-3')
set_param(sys,'Return vars',   '')

add_block('built-in/Mux',[sys,'/','Mux'])
set_param([sys,'/','Mux'],...
		'hide name',0,...
		'inputs','2',...
		'position',[135,106,165,139])

add_block('built-in/Discrete State-Space',[sys,'/','Discrete State-Space'])
set_param([sys,'/','Discrete State-Space'],...
		'hide name',0,...
		'A','[-a1 1;-a2 0]',...
		'B','[c1-a1 b1;c2-a2 b2]',...
		'C','[1 0]',...
		'D','[1 0]',...
		'position',[185,103,300,147])


%     Subsystem  ['Band-Limited',13,'White Noise'].

new_system([sys,'/',['Band-Limited',13,'White Noise']])
set_param([sys,'/',['Band-Limited',13,'White Noise']],'Location',[54,341,339,470])

add_block('built-in/Outport',[sys,'/',['Band-Limited',13,'White Noise/Out_1']])
set_param([sys,'/',['Band-Limited',13,'White Noise/Out_1']],...
		'position',[230,40,250,60])

add_block('built-in/Gain',[sys,'/',['Band-Limited',13,'White Noise/Gain']])
set_param([sys,'/',['Band-Limited',13,'White Noise/Gain']],...
		'Gain','[sqrt(Cov)]/[sqrt(Ts)]',...
		'position',[155,31,195,69])

add_block('built-in/Zero-Order Hold',[sys,'/',['Band-Limited',13,'White Noise/Zero-Order',13,'Hold']])
set_param([sys,'/',['Band-Limited',13,'White Noise/Zero-Order',13,'Hold']],...
		'Sample time','Ts',...
		'position',[85,34,120,66])

add_block('built-in/White Noise',[sys,'/',['Band-Limited',13,'White Noise/White Noise']])
set_param([sys,'/',['Band-Limited',13,'White Noise/White Noise']],...
		'Seed','seed',...
		'position',[25,40,45,60])
add_line([sys,'/',['Band-Limited',13,'White Noise']],[50,50;80,50])
add_line([sys,'/',['Band-Limited',13,'White Noise']],[200,50;225,50])
add_line([sys,'/',['Band-Limited',13,'White Noise']],[125,50;150,50])
set_param([sys,'/',['Band-Limited',13,'White Noise']],...
		'Mask Display','plot(t(:),r2(:))',...
		'Mask Type','Continuous White Noise.')
set_param([sys,'/',['Band-Limited',13,'White Noise']],...
		'Mask Dialogue','White noise for continuous (s-domain) systems.\nBand-limited using zero-order-hold.|Noise Power:|Sample Time:|Seed')
set_param([sys,'/',['Band-Limited',13,'White Noise']],...
		'Mask Translate','Cov = @1; Ts = @2; seed = @3; r = rand(1,12); r2 = [r(1),r;r,r(12)]; t =[1:13;1:13];')
set_param([sys,'/',['Band-Limited',13,'White Noise']],...
		'Mask Help','Implemented using white noise into Zero-Order Hold block. The seed and power can be vectors of the same length to produce a vector of white noise sources. For faster simulation, set sample time to the highest value possible but in accordance with the fastest dynamics of system.')
set_param([sys,'/',['Band-Limited',13,'White Noise']],...
		'Mask Entries','[0.1]\/1\/[23341]\/')


%     Finished composite block ['Band-Limited',13,'White Noise'].

set_param([sys,'/',['Band-Limited',13,'White Noise']],...
		'hide name',0,...
		'position',[25,72,70,108])


%     Subsystem  ['Repeating',13,'Sequence'].

new_system([sys,'/',['Repeating',13,'Sequence']])
set_param([sys,'/',['Repeating',13,'Sequence']],'Location',[5,40,315,196])

add_block('built-in/Outport',[sys,'/',['Repeating',13,'Sequence/out_1']])
set_param([sys,'/',['Repeating',13,'Sequence/out_1']],...
		'position',[285,60,305,80])

add_block('built-in/Look Up Table',[sys,'/',['Repeating',13,'Sequence/Look-Up Table']])
set_param([sys,'/',['Repeating',13,'Sequence/Look-Up Table']],...
		'Input_Values','t',...
		'Output_Values','y',...
		'position',[210,58,250,82])

add_block('built-in/Fcn',[sys,'/',['Repeating',13,'Sequence/Fcn1']])
set_param([sys,'/',['Repeating',13,'Sequence/Fcn1']],...
		'Expr','rem(u[1],period)',...
		'position',[110,60,150,80])

add_block('built-in/Clock',[sys,'/',['Repeating',13,'Sequence/Clock']])
set_param([sys,'/',['Repeating',13,'Sequence/Clock']],...
		'position',[45,60,65,80])
add_line([sys,'/',['Repeating',13,'Sequence']],[255,70;280,70])
add_line([sys,'/',['Repeating',13,'Sequence']],[70,70;105,70])
add_line([sys,'/',['Repeating',13,'Sequence']],[155,70;205,70])
set_param([sys,'/',['Repeating',13,'Sequence']],...
		'Mask Display','plot([t,t+period,t+2*period],[y,y,y])',...
		'Mask Type','Repeating table')
set_param([sys,'/',['Repeating',13,'Sequence']],...
		'Mask Dialogue','Repeating table.\nEnter values of time and output for first cycle.|Time values:|Output values:',...
		'Mask Translate','period = max(@1); t = @1; y = @2;')
set_param([sys,'/',['Repeating',13,'Sequence']],...
		'Mask Help','Repeats cycle given in table. Time values should be monotonically increasing.',...
		'Mask Entries','[0 50 51 100]\/[1 1 -1 -1]\/')


%     Finished composite block ['Repeating',13,'Sequence'].

set_param([sys,'/',['Repeating',13,'Sequence']],...
		'hide name',0,...
		'position',[30,147,65,183])

add_block('built-in/Outport',[sys,'/','Outport1'])
set_param([sys,'/','Outport1'],...
		'hide name',0,...
		'Port','2',...
		'position',[160,225,180,245])

add_block('built-in/Outport',[sys,'/','Outport'])
set_param([sys,'/','Outport'],...
		'hide name',0,...
		'position',[360,115,380,135])
add_line(sys,[170,125;180,125])
add_line(sys,[75,90;95,90;95,115;130,115])
add_line(sys,[70,165;95,165;95,130;130,130])
add_line(sys,[70,165;110,165;110,235;155,235])
add_line(sys,[305,125;355,125])

drawnow

% Return any arguments.
if (nargin | nargout)
	% Must use feval here to access system in memory
	if (nargin > 3)
		if (flag == 0)
			eval(['[ret,x0,str,ts,xts]=',sys,'(t,x,u,flag);'])
		else
			eval(['ret =', sys,'(t,x,u,flag);'])
		end
	else
		[ret,x0,str,ts,xts] = feval(sys);
	end
else
	drawnow % Flash up the model and execute load callback
end