Exemplo n.º 1
0
def test_ode_system(tb_args):
    fvarspecs = {
        "w": "k*w + a*itable + sin(t) + myauxfn1(t)*myauxfn2(w)",
        'aux_wdouble': 'w*2 + globalindepvar(t)',
        'aux_other': 'myauxfn1(2*t) + initcond(w)'
    }
    fnspecs = {'myauxfn1': (['t'], '2.5*cos(3*t)'), 'myauxfn2': (['w'], 'w/2')}
    DSargs = {
        'tdomain': [0.1, 2.1],
        'pars': {
            'k': 2,
            'a': -0.5
        },
        'inputs': {
            'itable': InterpolateTable(tb_args).variables['x1']
        },
        'auxvars': ['aux_wdouble', 'aux_other'],
        'algparams': {
            'init_step': 0.01,
            'strict': False
        },
        'checklevel': 2,
        'name': 'ODEtest',
        'fnspecs': fnspecs,
        'varspecs': fvarspecs
    }
    testODE = Vode_ODEsystem(DSargs)
    assert testODE.pars == DSargs['pars']
    assert (not testODE.defined)
    testODE.set(ics={'w': 3.0}, tdata=[0.11, 2.1])
    testtraj = testODE.compute('test1')
    assert testODE.defined
    assert_almost_equal(testtraj(0.5, 'w'), 6.05867901304, 3)
    assert_almost_equal(testtraj(0.2, 'aux_other'), 3.90581993688, 3)
    assert testODE.indepvariable.depdomain == Interval('t', float64,
                                                       [0.11, 2.1])
    assert testODE.diagnostics.hasWarnings()
    assert testODE.diagnostics.findWarnings(21) != []

    # Now adding a terminating co-ordinate threshold event...
    ev_args = {
        'name': 'threshold',
        'eventtol': 1e-4,
        'eventdelay': 1e-5,
        'starttime': 0,
        'active': True,  # = default
        'term': True,
        'precise': True  # = default
    }
    thresh_ev = Events.makePythonStateZeroCrossEvent('w', 20, 1, ev_args)
    testODE.eventstruct.add(thresh_ev)
    traj2 = testODE.compute('test2')
    assert testODE.diagnostics.hasWarnings()
    assert testODE.diagnostics.findWarnings(10) != []
    print(testODE.diagnostics.showWarnings())
    assert_almost_equal(traj2.getEventTimes()['threshold'][0], 1.51449456, 3)
    assert testODE.indepvariable.depdomain == Interval('t', float64,
                                                       [0.11, 2.1])
Exemplo n.º 2
0
def test_ode_system(tb_args):
    fvarspecs = {
        "w": "k*w + a*itable + sin(t) + myauxfn1(t)*myauxfn2(w)",
        'aux_wdouble': 'w*2 + globalindepvar(t)',
        'aux_other': 'myauxfn1(2*t) + initcond(w)'
    }
    fnspecs = {
        'myauxfn1': (['t'], '2.5*cos(3*t)'),
        'myauxfn2': (['w'], 'w/2')
    }
    DSargs = {
        'tdomain': [0.1, 2.1],
        'pars': {'k': 2, 'a': -0.5},
        'inputs': {'itable': InterpolateTable(tb_args).variables['x1']},
        'auxvars': ['aux_wdouble', 'aux_other'],
        'algparams': {'init_step': 0.01, 'strict': False},
        'checklevel': 2,
        'name': 'ODEtest',
        'fnspecs': fnspecs,
        'varspecs': fvarspecs
    }
    testODE = Vode_ODEsystem(DSargs)
    assert testODE.pars == DSargs['pars']
    assert (not testODE.defined)
    testODE.set(
        ics={'w': 3.0},
        tdata=[0.11, 2.1]
    )
    testtraj = testODE.compute('test1')
    assert testODE.defined
    assert_almost_equal(testtraj(0.5, 'w'), 6.05867901304, 3)
    assert_almost_equal(testtraj(0.2, 'aux_other'), 3.90581993688, 3)
    assert testODE.indepvariable.depdomain == Interval(
        't', float64, [0.11, 2.1])
    assert testODE.diagnostics.hasWarnings()
    assert testODE.diagnostics.findWarnings(21) != []

    # Now adding a terminating co-ordinate threshold event...
    ev_args = {
        'name': 'threshold',
        'eventtol': 1e-4,
        'eventdelay': 1e-5,
        'starttime': 0,
        'active': True,  # = default
        'term': True,
        'precise': True  # = default
    }
    thresh_ev = Events.makePythonStateZeroCrossEvent('w', 20, 1, ev_args)
    testODE.eventstruct.add(thresh_ev)
    traj2 = testODE.compute('test2')
    assert testODE.diagnostics.hasWarnings()
    assert testODE.diagnostics.findWarnings(10) != []
    print(testODE.diagnostics.showWarnings())
    assert_almost_equal(traj2.getEventTimes()['threshold'][0], 1.51449456, 3)
    assert testODE.indepvariable.depdomain == Interval(
        't', float64, [0.11, 2.1])
Exemplo n.º 3
0
def test_vode_events_with_external_input(my_input):
    """
        Test Vode_ODEsystem with events involving external inputs.
        Robert Clewley, September 2006.
    """
    xs = ['x1', 'x2', 'x3']
    ys = [0, 0.5, 1]
    fvarspecs = {"w": "k*w  + pcwfn(sin(t)) + myauxfn1(t)*myauxfn2(w)",
                 'aux_wdouble': 'w*2 + globalindepvar(t)',
                 'aux_other': 'myauxfn1(2*t) + initcond(w)'}
    fnspecs = {'myauxfn1': (['t'], '2.5*cos(3*t)'),
               'myauxfn2': (['w'], 'w/2'),
               'pcwfn': makeMultilinearRegrFn('x', xs, ys)}
    # targetlang is optional if the default python target is desired
    DSargs = args(fnspecs=fnspecs, name='ODEtest')
    DSargs.varspecs = fvarspecs
    DSargs.tdomain = [0.1, 2.1]
    DSargs.pars = {'k': 2, 'a': -0.5, 'x1': -3, 'x2': 0.5, 'x3': 1.5}
    DSargs.vars = 'w'
    DSargs.inputs = {'in': my_input.variables['example_input']}
    DSargs.algparams = {'init_step': 0.01}
    DSargs.checklevel = 2
    testODE = Vode_ODEsystem(DSargs)
    assert not testODE.defined
    testODE.set(ics={'w': 3.0},
                tdata=[0.11, 2.1])
    traj1 = testODE.compute('traj1')
    assert testODE.defined
    assert_almost_equal(traj1(0.5, 'w'), 8.9771499, 5)
    assert not testODE.diagnostics.hasWarnings()
    assert_almost_equal(traj1(0.2, ['aux_other']), 3.905819936, 5)
    print("\nNow adding a terminating co-ordinate threshold event")
    print(" and non-terminating timer event")
    # Show off the general-purpose, language-independent event creator:
    #  'makeZeroCrossEvent'
    ev_args_nonterm = {'name': 'monitor',
                       'eventtol': 1e-4,
                       'eventdelay': 1e-5,
                       'starttime': 0,
                       'active': True,
                       'term': False,
                       'precise': True}
    thresh_ev_nonterm = Events.makeZeroCrossEvent('in', 0,
                                                  ev_args_nonterm, inputnames=['in'])
    # Now show use of the python-target specific creator:
    #  'makePythonStateZeroCrossEvent', which is also only
    #  able to make events for state variable threshold crossings
    ev_args_term = {'name': 'threshold',
                    'eventtol': 1e-4,
                    'eventdelay': 1e-5,
                    'starttime': 0,
                    'active': True,
                    'term': True,
                    'precise': True}
    thresh_ev_term = Events.makePythonStateZeroCrossEvent('w',
                                                          20, 1, ev_args_term)
    testODE.eventstruct.add([thresh_ev_nonterm, thresh_ev_term])
    print("Recomputing trajectory:")
    print("traj2 = testODE.compute('traj2')")
    traj2 = testODE.compute('traj2')
    print("\ntestODE.diagnostics.showWarnings() => ")
    testODE.diagnostics.showWarnings()
    print("\ntraj2.indepdomain.get() => ", traj2.indepdomain.get())
    indep1 = traj2.indepdomain[1]
    assert indep1 < 1.17 and indep1 > 1.16
    mon_evs_found = testODE.getEvents('monitor')
    assert len(mon_evs_found) == 1
Exemplo n.º 4
0
def test_vode_events_with_external_input(my_input):
    """
        Test Vode_ODEsystem with events involving external inputs.
        Robert Clewley, September 2006.
    """
    xs = ['x1', 'x2', 'x3']
    ys = [0, 0.5, 1]
    fvarspecs = {"w": "k*w  + pcwfn(sin(t)) + myauxfn1(t)*myauxfn2(w)",
                 'aux_wdouble': 'w*2 + globalindepvar(t)',
                 'aux_other': 'myauxfn1(2*t) + initcond(w)'}
    fnspecs = {'myauxfn1': (['t'], '2.5*cos(3*t)'),
               'myauxfn2': (['w'], 'w/2'),
               'pcwfn': makeMultilinearRegrFn('x', xs, ys)}
    # targetlang is optional if the default python target is desired
    DSargs = args(fnspecs=fnspecs, name='ODEtest')
    DSargs.varspecs = fvarspecs
    DSargs.tdomain = [0.1, 2.1]
    DSargs.pars = {'k': 2, 'a': -0.5, 'x1': -3, 'x2': 0.5, 'x3': 1.5}
    DSargs.vars = 'w'
    DSargs.inputs = {'in': my_input.variables['example_input']}
    DSargs.algparams = {'init_step': 0.01}
    DSargs.checklevel = 2
    testODE = Vode_ODEsystem(DSargs)
    assert not testODE.defined
    testODE.set(ics={'w': 3.0},
                tdata=[0.11, 2.1])
    traj1 = testODE.compute('traj1')
    assert testODE.defined
    assert_almost_equal(traj1(0.5, 'w'), 8.9771499, 5)
    assert not testODE.diagnostics.hasWarnings()
    assert_almost_equal(traj1(0.2, ['aux_other']), 3.905819936, 5)
    print("\nNow adding a terminating co-ordinate threshold event")
    print(" and non-terminating timer event")
    # Show off the general-purpose, language-independent event creator:
    #  'makeZeroCrossEvent'
    ev_args_nonterm = {'name': 'monitor',
                       'eventtol': 1e-4,
                       'eventdelay': 1e-5,
                       'starttime': 0,
                       'active': True,
                       'term': False,
                       'precise': True}
    thresh_ev_nonterm = Events.makeZeroCrossEvent('in', 0,
                                                  ev_args_nonterm, inputnames=['in'])
    # Now show use of the python-target specific creator:
    #  'makePythonStateZeroCrossEvent', which is also only
    #  able to make events for state variable threshold crossings
    ev_args_term = {'name': 'threshold',
                    'eventtol': 1e-4,
                    'eventdelay': 1e-5,
                    'starttime': 0,
                    'active': True,
                    'term': True,
                    'precise': True}
    thresh_ev_term = Events.makePythonStateZeroCrossEvent('w',
                                                          20, 1, ev_args_term)
    testODE.eventstruct.add([thresh_ev_nonterm, thresh_ev_term])
    print("Recomputing trajectory:")
    print("traj2 = testODE.compute('traj2')")
    traj2 = testODE.compute('traj2')
    print("\ntestODE.diagnostics.showWarnings() => ")
    testODE.diagnostics.showWarnings()
    print("\ntraj2.indepdomain.get() => ", traj2.indepdomain.get())
    indep1 = traj2.indepdomain[1]
    assert indep1 < 1.17 and indep1 > 1.16
    mon_evs_found = testODE.getEvents('monitor')
    assert len(mon_evs_found) == 1