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List of Pending changes for control-python
RMM, 5 Sep 09
This file contains brief notes on features that need to be added to
the python control library. Mainly intended to keep track of "bigger
picture" things that need to be done.
--> See src/matlab.py for a list of MATLAB functions that eventually need
to be implemented.
OPEN BUGS
* matlab.step() doesn't handle systems with a pole at the origin (use lsim2)
* TF <-> SS transformations are buggy; see tests/convert_test.py
* hsvd returns different value than MATLAB (2010a); see modelsimp_test.py
* lsim doesn't work for StateSpace systems (signal.lsim2 bug??)
Transfer code from Roberto Bucher's yottalab to python-control
acker - pole placement using Ackermann method
c2d - contimous to discrete time conversion
full_obs - full order observer
red_obs - reduced order observer
comp_form - state feedback controller+observer in compact form
comp_form_i - state feedback controller+observer+integ in compact form
dsimul - simulate discrete time systems
dstep - step response (plot) of discrete time systems
dimpulse - imoulse response (plot) of discrete time systems
bb_step - step response (plot) of continous time systems
sysctr - system+controller+observer+feedback
care - Solve Riccati equation for contimous time systems
dare - Solve Riccati equation for discrete time systems
dlqr - discrete linear quadratic regulator
minreal - minimal state space representation
Transfer code from Ryan Krauss's control.py to python-control
* phase margin computations (as part of margin command)
* step reponse
* c2d, c2d_tustin (compare to Bucher version first)
Examples and test cases
* Put together unit tests for all functions (after deciding on framework)
* Figure out how to import 'figure' command properly (version issue?)
* Figure out source of BadCoefficients warning messages (pvtol-lqr and others)
* tests/test_all.py should report on failed tests
* tests/freqresp.py needs to be converted to unit test
* Convert examples/test-{response,statefbk}.py to unit tests
Root locus plot improvements
* Make sure that scipy.signal.lti objects still work
* Update calling syntax to be consistent with other plotting commands
State space class fixes
* Implement pzmap for state space systems
Basic functions to be added
* margin - compute gain and phase margin (no plot)
* lyap - solve Lyapunov equation (use SLICOT SB03MD.f)
* See http://www.slicot.org/shared/libindex.html for list of functions
----
Instructions for building python package
* python setup.py build
* python setup.py install
* python setup.py sdist