Detailed Description

Encapsulates a distributor for the flight control system.

The distributor component models a distributor -

Within a test, additional tests can be specified, which allows for complex groupings of logical comparisons. Each test contains additional conditions, as well as possibly additional tests.

<distributor name="name/is/irrelevant" type="exclusive|inclusive">
 
  <case>
    [<test logic="{AND|OR}" value="{property|value}">
      {property} {conditional} {property|value}
      <test logic="{AND|OR}">
        {property} {conditional} {property|value}
        ...
      </test>
      ...
    </test>] <!-- Optional <test> one time. A <case> without a <test> is always executed -->
    <property value="number|property"> property_name </property>
    ...
  </case>
 
  ... <!-- Additional cases -->
 
</distributor>

If the distributor type is exclusive no further <case> components are evaluated once a case <test> condition has been found to be true.

If the distributor type is inclusive all the <case> components are evaluated no matter how many <case> conditions are true.

Whether the distributor type is inclusive or exclusive the <case> component without <test> is always executed.

Here's an example that evaluate the sign of the property test/number and sets test/default to the value of test/reference.

<distributor>
  <case>
    <test>
      test/number lt 0.0
    </test>
    <property value="-1.0"> test/sign </property>
  </case>
  <case>
    <test>
      test/number ge 0.0
    </test>
    <property value="1.0"> test/sign </property>
  </case>
  <!-- default case -->
  <case>
    <property value="test/reference"> test/default </property>
  </case>
</distributor>

Note: In the "logic" attribute, "AND" is the default logic, if none is supplied.

Author: Jon S. Berndt

Definition at line 125 of file FGDistributor.h.

#include <FGDistributor.h>

Inheritance diagram for FGDistributor:

Collaboration diagram for FGDistributor:

Public Member Functions
	FGDistributor (FGFCS fcs, Element element)
	Constructor.

bool	Run (void) override
	Executes the distributor logic.

Public Member Functions inherited from FGFCSComponent
	FGFCSComponent (FGFCS fcs, Element el)
	Constructor.

virtual	~FGFCSComponent ()
	Destructor.

std::string	GetName (void) const

double	GetOutput (void) const

virtual double	GetOutputPct (void) const

std::string	GetType (void) const

virtual void	ResetPastStates (void)

virtual void	SetOutput (void)

Public Member Functions inherited from FGJSBBase
	FGJSBBase ()
	Constructor for FGJSBBase.

virtual	~FGJSBBase ()
	Destructor for FGJSBBase.

void	disableHighLighting (void)
	Disables highlighting in the console output.

Additional Inherited Members
Public Types inherited from FGJSBBase
enum	{ eL = 1 , eM , eN }
	Moments L, M, N. More...

enum	{ eP = 1 , eQ , eR }
	Rates P, Q, R. More...

enum	{ eU = 1 , eV , eW }
	Velocities U, V, W. More...

enum	{ eX = 1 , eY , eZ }
	Positions X, Y, Z. More...

enum	{ ePhi = 1 , eTht , ePsi }
	Euler angles Phi, Theta, Psi. More...

enum	{ eDrag = 1 , eSide , eLift }
	Stability axis forces, Drag, Side force, Lift. More...

enum	{ eRoll = 1 , ePitch , eYaw }
	Local frame orientation Roll, Pitch, Yaw. More...

enum	{ eNorth = 1 , eEast , eDown }
	Local frame position North, East, Down. More...

enum	{ eLat = 1 , eLong , eRad }
	Locations Radius, Latitude, Longitude. More...

enum	{ inNone = 0 , inDegrees , inRadians , inMeters , inFeet }
	Conversion specifiers. More...

Static Public Member Functions inherited from FGJSBBase
static const std::string &	GetVersion (void)
	Returns the version number of JSBSim.

static constexpr double	KelvinToFahrenheit (double kelvin)
	Converts from degrees Kelvin to degrees Fahrenheit.

static constexpr double	CelsiusToRankine (double celsius)
	Converts from degrees Celsius to degrees Rankine.

static constexpr double	RankineToCelsius (double rankine)
	Converts from degrees Rankine to degrees Celsius.

static constexpr double	KelvinToRankine (double kelvin)
	Converts from degrees Kelvin to degrees Rankine.

static constexpr double	RankineToKelvin (double rankine)
	Converts from degrees Rankine to degrees Kelvin.

static constexpr double	FahrenheitToCelsius (double fahrenheit)
	Converts from degrees Fahrenheit to degrees Celsius.

static constexpr double	CelsiusToFahrenheit (double celsius)
	Converts from degrees Celsius to degrees Fahrenheit.

static constexpr double	CelsiusToKelvin (double celsius)
	Converts from degrees Celsius to degrees Kelvin.

static constexpr double	KelvinToCelsius (double kelvin)
	Converts from degrees Kelvin to degrees Celsius.

static constexpr double	FeetToMeters (double measure)
	Converts from feet to meters.

static bool	EqualToRoundoff (double a, double b)
	Finite precision comparison.

static bool	EqualToRoundoff (float a, float b)
	Finite precision comparison.

static bool	EqualToRoundoff (float a, double b)
	Finite precision comparison.

static bool	EqualToRoundoff (double a, float b)
	Finite precision comparison.

static constexpr double	Constrain (double min, double value, double max)
	Constrain a value between a minimum and a maximum value.

static constexpr double	sign (double num)

Static Public Attributes inherited from FGJSBBase
static char	highint [5] = {27, '[', '1', 'm', '\0' }
	highlights text

static char	halfint [5] = {27, '[', '2', 'm', '\0' }
	low intensity text

static char	normint [6] = {27, '[', '2', '2', 'm', '\0' }
	normal intensity text

static char	reset [5] = {27, '[', '0', 'm', '\0' }
	resets text properties

static char	underon [5] = {27, '[', '4', 'm', '\0' }
	underlines text

static char	underoff [6] = {27, '[', '2', '4', 'm', '\0' }
	underline off

static char	fgblue [6] = {27, '[', '3', '4', 'm', '\0' }
	blue text

static char	fgcyan [6] = {27, '[', '3', '6', 'm', '\0' }
	cyan text

static char	fgred [6] = {27, '[', '3', '1', 'm', '\0' }
	red text

static char	fggreen [6] = {27, '[', '3', '2', 'm', '\0' }
	green text

static char	fgdef [6] = {27, '[', '3', '9', 'm', '\0' }
	default text

static short	debug_lvl = 1

Protected Member Functions inherited from FGFCSComponent
virtual void	bind (Element el, FGPropertyManager pm)

void	CheckInputNodes (size_t MinNodes, size_t MaxNodes, Element *el)

void	Clip (void)

void	Delay (void)

Static Protected Member Functions inherited from FGJSBBase
static std::string	CreateIndexedPropertyName (const std::string &Property, int index)

Protected Attributes inherited from FGFCSComponent
bool	clip

FGParameter_ptr	ClipMax

FGParameter_ptr	ClipMin

bool	cyclic_clip

unsigned int	delay

double	delay_time

double	dt

FGFCS *	fcs

int	index

std::vector< FGPropertyValue_ptr >	InitNodes

double	Input

std::vector< FGPropertyValue_ptr >	InputNodes

std::string	Name

double	Output

std::vector< double >	output_array

std::vector< FGPropertyNode_ptr >	OutputNodes

std::string	Type

Static Protected Attributes inherited from FGJSBBase
static constexpr double	radtodeg = 180. / M_PI

static constexpr double	degtorad = M_PI / 180.

static constexpr double	hptoftlbssec = 550.0

static constexpr double	psftoinhg = 0.014138

static constexpr double	psftopa = 47.88

static constexpr double	fttom = 0.3048

static constexpr double	ktstofps = 1852./(3600*fttom)

static constexpr double	fpstokts = 1.0 / ktstofps

static constexpr double	inchtoft = 1.0/12.0

static constexpr double	m3toft3 = 1.0/(fttomfttomfttom)

static constexpr double	in3tom3 = inchtoftinchtoftinchtoft/m3toft3

static constexpr double	inhgtopa = 3386.38

static constexpr double	slugtolb = 32.174049
	Note that definition of lbtoslug by the inverse of slugtolb and not to a different constant you can also get from some tables will make lbtoslug*slugtolb == 1 up to the magnitude of roundoff.

static constexpr double	lbtoslug = 1.0/slugtolb

static constexpr double	kgtolb = 2.20462

static constexpr double	kgtoslug = 0.06852168

static const std::string	needed_cfg_version = "2.0"

static const std::string	JSBSim_version = JSBSIM_VERSION " " __DATE__ " " __TIME__

Constructor & Destructor Documentation

◆ FGDistributor()

FGDistributor	(	FGFCS *	fcs,
		Element *	element
	)

Constructor.

Parameters

fcs	a pointer to the parent FGFCS class
element	a pointer to the Element (from the config file XML tree) that represents this distributor component

Definition at line 53 of file FGDistributor.cpp.

  : FGFCSComponent(fcs, element)
{
  auto PropertyManager = fcs->GetPropertyManager();
 
  bind(element, PropertyManager.get()); // Bind() this component here in case it is used in its own
                                        // definition for a sample-and-hold
 
  string type_string = element->GetAttributeValue("type");
  if (type_string == "inclusive") Type = eInclusive;
  else if (type_string == "exclusive") Type = eExclusive;
  else {
    throw BaseException("Not a known Distributor type, "+type_string);
  }
 
  Element* case_element = element->FindElement("case");
  while (case_element) {
    auto current_case = make_unique<Case>();
    Element* test_element = case_element->FindElement("test");
    try {
      if (test_element) current_case->SetTest(test_element, PropertyManager);
    } catch (BaseException& e) {
      cerr << test_element->ReadFrom()
           << fgred << e.what() << reset << endl;
      throw;
    }
    Element* prop_val_element = case_element->FindElement("property");
    while (prop_val_element) {
      string value_string = prop_val_element->GetAttributeValue("value");
      string property_string = prop_val_element->GetDataLine();
      current_case->AddPropValPair(property_string, value_string, PropertyManager,
                                   prop_val_element);
      prop_val_element = case_element->FindNextElement("property");
    }
    Cases.push_back(std::move(current_case));
    case_element = element->FindNextElement("case");
  }
 
  Debug(0);
}

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Member Function Documentation

◆ Run()

bool Run ( void )

overridevirtual

Executes the distributor logic.

Returns: true - always

Reimplemented from FGFCSComponent.

Definition at line 96 of file FGDistributor.cpp.

{
  bool completed = false;
  for (auto& Case: Cases) { // Loop through all Cases
    if (Case->HasTest()) {
      if (Case->GetTestResult() && !((Type == eExclusive) && completed)) {
        Case->SetPropValPairs();
        completed = true;
      }
    } else { // If no test present, execute always
      Case->SetPropValPairs();
    }
  }
 
  return true;
}

The documentation for this class was generated from the following files:

Detailed Description

Public Member Functions

Additional Inherited Members

Constructor & Destructor Documentation

◆ FGDistributor()

Member Function Documentation

◆ Run()