Package org.ptolemy.qss.solver

Class QSS2Fd

java.lang.Object

org.ptolemy.qss.solver.QSSBase

org.ptolemy.qss.solver.QSS2Fd

public final class QSS2Fd
extends QSSBase

Implement the QSS2 method for solving ordinary differential equations.

Fd: When handling a rate-event, select the time at which to estimate the second derivative for the internal, continuous state model using a standard finite-difference perturbation procedure.

Since:

Ptolemy II 11.0

Version:

$Id$

Author:

David M. Lorenzetti, Contributor: Thierry S. Nouidui

Pt.AcceptedRating:

red (reviewmoderator) // FIXME: Fill in.

Pt.ProposedRating:

red (dmlorenzetti)

Field Summary

Fields inherited from class org.ptolemy.qss.solver.QSSBase

_cStateModels, _currSimTime, _derivFcn, _dqs, _evtIndCt, _exactInputs, _ivCt, _ivModels, _qStateModels, _quantEvtTimeMax, _stateCt

Constructor Summary

Constructors

Constructor	Description
QSS2Fd()

Method Summary

Modifier and Type	Method	Description
void	_initializeWorker()	Initialize object fields (QSS-specific).
protected Time	_predictQuantizationEventTimeWorker(int stateIdx, Time quantEvtTimeMax)	Get the predicted quantization-event time for a state (QSS-specific).
protected void	_triggerQuantizationEventWorker(int stateIdx)	Form a new external, quantized state model (QSS-specific).
protected void	_triggerRateEventWorker()	Form new internal, continuous state models (QSS-specific).
protected void	_triggerRateEventWorkerEventDetection()	Form new internal, continuous state models (QSS-specific).
int	getStateModelOrder()	Get the order of the external, quantized state models exposed by the integrator.

Methods inherited from class org.ptolemy.qss.solver.QSSBase

_predictQuantizationEventDeltaTimeQSS2General, _predictQuantizationEventDeltaTimeQSS2QFromC, _predictQuantizationEventDeltaTimeQSS3General, _predictQuantizationEventDeltaTimeQSS3QFromC, advanceToTime, evaluateStateModel, evaluateStateModelContinuous, findQuantum, getCurrentSimulationTime, getEventIndicatorCount, getExactInputs, getInputVariableCount, getInputVariableModel, getStateCount, getStateModel, initialize, initializeDerivativeFunction, initializeDerivativeFunction, initializeSimulationTime, minimumTime, needInputVariableModelIndex, needQuantizationEventIndex, needQuantizationEventIndexes, needRateEvent, predictQuantizationEventTime, predictQuantizationEventTimeEarliest, predictQuantizationEventTimeEarliest, setCurrentSimulationTime, setExactInputs, setInputVariableModel, setNumberOfEventIndicators, setQuantizationEventTimeMaximum, setQuantizationTolerance, setQuantizationTolerances, setStateValue, stepToTime, stepToTime, stringifyStateModel, stringifyStateModelContinuous, triggerQuantizationEvent, triggerQuantizationEvents, triggerRateEvent, triggerRateEvent, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QSS2Fd

public QSS2Fd()

Method Detail

getStateModelOrder

public final int getStateModelOrder()

Get the order of the external, quantized state models exposed by the integrator.

Specified by:

getStateModelOrder in class QSSBase

Returns:

Order of the external, quantized state models.

_initializeWorker

public final void _initializeWorker()

Initialize object fields (QSS-specific).

Specified by:

_initializeWorker in class QSSBase

_predictQuantizationEventTimeWorker

protected final Time _predictQuantizationEventTimeWorker(int stateIdx,
                                                         Time quantEvtTimeMax)

Get the predicted quantization-event time for a state (QSS-specific).

Specified by:

_predictQuantizationEventTimeWorker in class QSSBase

Parameters:

stateIdx - The state index.

quantEvtTimeMax - The maximum quantization event time.

Returns:

the predicted quantization-event time for a state (QSS-specific).

_triggerQuantizationEventWorker

protected final void _triggerQuantizationEventWorker(int stateIdx)

Form a new external, quantized state model (QSS-specific).

Specified by:

_triggerQuantizationEventWorker in class QSSBase

Parameters:

stateIdx - The state index, 0 <= stateIdx < this.getStateCount().

_triggerRateEventWorker

protected final void _triggerRateEventWorker()
                                      throws java.lang.Exception

Form new internal, continuous state models (QSS-specific).

Specified by:

_triggerRateEventWorker in class QSSBase

Throws:

java.lang.Exception - If the rate event worker fails.

_triggerRateEventWorkerEventDetection

protected final void _triggerRateEventWorkerEventDetection()
                                                    throws java.lang.Exception

Form new internal, continuous state models (QSS-specific).

Specified by:

_triggerRateEventWorkerEventDetection in class QSSBase

Throws:

java.lang.Exception - If the rate event worker event detection fails.