Appareillage de commande

An actuator is a mechanical device for moving or controlling a mechanism or system. An actuator takes energy, usually created by air, electricity, or liquid, and converts that into some kind of motion.

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 255.

Table 255 — IfcActuator Object Typing

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 256.

Table 256 — IfcActuator Property Sets for Objects

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 257.

Table 257 — IfcActuator Quantity Sets

Material Constituents

The Material Constituents concept applies to this entity as shown in Table 258.
CasingMaterial from which the casing is constructed.

Table 258 — IfcActuator Material Constituents

Port Nesting

The Port Nesting concept applies to this entity as shown in Table 259.
 InputSinkSignalReceives signal.

Table 259 — IfcActuator Port Nesting

Control Flow

The Control Flow concept applies to this entity as shown in Table 260.
IfcFlowControllerIndicates a connected valve, damper, or switch controlled by the actuator.

Table 260 — IfcActuator Control Flow

XSD Specification:

 <xs:element name="IfcActuator" type="ifc:IfcActuator" substitutionGroup="ifc:IfcDistributionControlElement" nillable="true"/>
 <xs:complexType name="IfcActuator">
   <xs:extension base="ifc:IfcDistributionControlElement">
    <xs:attribute name="PredefinedType" type="ifc:IfcActuatorTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcActuator
SUBTYPE OF IfcDistributionControlElement;
PredefinedType : OPTIONAL IfcActuatorTypeEnum;
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcActuatorTypeEnum.USERDEFINED) OR ((PredefinedType = IfcActuatorTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCBUILDINGCONTROLSDOMAIN.IFCACTUATORTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcActuatorType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no actuator type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcActuatorType.

Inheritance Graph:

ENTITY IfcActuator
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcDistributionElement
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionControlElement
AssignedToFlowElement : SET [0:1] OF IfcRelFlowControlElements FOR RelatedControlElements;
ENTITY IfcActuator
PredefinedType : OPTIONAL IfcActuatorTypeEnum;

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