Mercurial > hg > ltpda
view m-toolbox/classes/@ssm/ssm2rational.m @ 13:e05504b18072 database-connection-manager
Move more functions to utils.repository
author | Daniele Nicolodi <nicolodi@science.unitn.it> |
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date | Mon, 05 Dec 2011 16:20:06 +0100 |
parents | f0afece42f48 |
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% SSM2RATIONAL converts a statespace model object to a rational frac. object %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % DESCRIPTION: SSM2RATIONAL converts a statespace model object to % a rational fraction object. % % CALL: % >> rats = ssm2rational(ssm, pl); % % INPUT : % % ssm - a ssm object % pl - a plist with parameters 'inputs', 'states' and % 'outputs' to indicate which inputs, states and output % variables are taken in account. This requires proper % variable naming. If a variable called appears more % that once it will be used once only. % % % OUTPUT: % % rats - an array of rational fraction object % % <a href="matlab:utils.helper.displayMethodInfo('ssm', 'ssm2rational')">Parameters Description</a> % % VERSION: $Id: ssm2rational.m,v 1.19 2011/04/08 08:56:23 hewitson Exp $ % % IMPLEMENTATION NOT FINISHED!!!! %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% function varargout = ssm2rational(varargin) % Check if this is a call for parameters if utils.helper.isinfocall(varargin{:}) varargout{1} = getInfo(varargin{3}); return end %% starting initial checks utils.helper.msg(utils.const.msg.MNAME, ['running ', mfilename]); % Collect input variable names in_names = cell(size(varargin)); for ii = 1:nargin,in_names{ii} = inputname(ii);end % Collect all SSMs and plists [sys, ssm_invars, rest] = utils.helper.collect_objects(varargin(:), 'ssm', in_names); [pl, invars2, rest] = utils.helper.collect_objects(rest(:), 'plist'); if ~isempty(rest) pl = combine(pl, plist(rest{:})); end pl = combine(pl, getDefaultPlist()); if numel(sys) ~= 1 error('### Input (only) one SSM object.'); end %% begin function body %% convert to double % Convert to double arrays [A,B,C,D,Ts,inputvarnames,ssvarnames,outputvarnames] = double(sys, pl); Ninputs_out = numel(inputvarnames); Noutputs_out = numel(outputvarnames); if Ts > 0 error('system should be time continuous. Use ssm2miir instead'); else %% convert to pzm rational_out(Noutputs_out, Ninputs_out) = rational(); for ii=1:Ninputs_out for oo=1:Noutputs_out sys_loc =ss( A,B(:,ii),C(oo,:),D(oo, ii ),Ts); sys_loc = minreal(sys_loc); [A_loc, B_loc, C_loc, D_loc]=ssdata(sys_loc); [b,a] = ss2tf(A_loc, B_loc, C_loc, D_loc); name = [ssm_invars{1},' : ',inputvarnames{ii},' -> ',outputvarnames{oo}]; if isequal(b,0) || isequal(a,0) m = rational(); else m = rational(real(b), real(a), 1/sys.timestep); end m.addHistory(ssm.getInfo(mfilename), pl , ssm_invars, sys.hist); m.name = name; rational_out(oo, ii) = m; end end end if nargout == numel(rational_out) for ii = 1:numel(rational_out) varargout{ii} = rational_out(ii); end else varargout{1} = rational_out; end end %-------------------------------------------------------------------------- % Get Info Object %-------------------------------------------------------------------------- function ii = getInfo(varargin) if nargin == 1 && strcmpi(varargin{1}, 'None') sets = {}; pl = []; else sets = {'Default'}; pl = getDefaultPlist; end % Build info object ii = minfo(mfilename, 'ssm', 'ltpda', utils.const.categories.converter, '$Id: ssm2rational.m,v 1.19 2011/04/08 08:56:23 hewitson Exp $', sets, pl); end %-------------------------------------------------------------------------- % Get Default Plist %-------------------------------------------------------------------------- function pl = getDefaultPlist() pl = plist(); p = param({'inputs', ['Specify the inputs. Give one of:<ul>'... '<li>A cell-array of input port names.</li>'... '<li>A cell-array of logical arrays specifying which input ports to use for each input block.</li>'... '<li>A cell-array of double values specifying which input ports to use for each input block.<li>'... '<li>The string ''ALL'' to use all inputs.']}, paramValue.STRING_VALUE('ALL')); pl.append(p); p = param({'states', 'Specify the states. Specify the states as for the ''inputs'' parameter.'}, paramValue.STRING_VALUE('ALL')); pl.append(p); p = param({'outputs', 'Specify the outputs. Specify the outputs as for the ''inputs'' parameter.'}, paramValue.STRING_VALUE('ALL')); pl.append(p); end