exported
necessary
hydraulic actuator
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Hydraulicactuator
Generated on 2026-04-16
Natural Language Definition
EN
A hydraulic actuator is an actuator that converts hydraulic fluid pressure into mechanical motion through hydraulic power transmission.
PT-BR
Um atuador hidráulico é um atuador que converte pressão de fluido hidráulico em movimento mecânico através de transmissão de potência hidráulica.
Formal Axioms
Semi-formal (Aristotelian)
Every hydraulic actuator is an actuator that has hydraulic fluid portion as input and participates in hydraulic to mechanical energy conversion process.
First-Order Logic Theory
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▸ Stored override
∀x(HydraulicActuator(x) → Actuator(x) ∧ ∃y(HydraulicFluid(y) ∧ hasInput(x,y)) ∧ ∃z(HydraulicToMechanicalEnergyConversionProcess(z) ∧ participatesIn(x,z)))
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix : <https://www.inf.ufrgs.br/ontologies/copi/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix bfo: <http://purl.obolibrary.org/obo/> .
@prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> .
@prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix apv: <http://inf.ufrgs.br/ontologies/apv#> .
### COPI — Core Ontology for Petroleum Installations
### Class module: HydraulicActuator
<https://www.inf.ufrgs.br/ontologies/copi>
rdf:type owl:Ontology ;
dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ;
dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ;
dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ;
skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ;
skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ;
skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ;
skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ;
owl:versionInfo "1.1.0" ;
owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ;
owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ;
dcterms:creator "Nicolau Oyhenard dos Santos"@en ;
dcterms:contributor "Cauã Antunes" ;
dcterms:contributor "Haroldo Rojas" ;
dcterms:contributor "Rafael Petry" ;
dcterms:contributor "Régis Romeu" ;
dcterms:contributor "Mara Abel" ;
dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ;
dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ;
dcterms:license <https://creativecommons.org/licenses/by/4.0/> ;
dcterms:created "2026-04-08"^^xsd:date ;
dcterms:modified "2026-10-08"^^xsd:date ;
apv:GlobalMinLanguageCoverage "en pt-br" ;
apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ;
apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" .
iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ;
apv:MinAnnotationLength 20 .
### Identity-giving function
:COPI_0000407 rdf:type owl:Class ; # ActuationFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000408 # ActuationProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000408 # ActuationProcess
] ;
rdfs:label "actuation function"@en ;
rdfs:label "função de atuação"@pt-br .
### Process type
:COPI_0000408 rdf:type owl:Class ; # ActuationProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "actuation process"@en ;
rdfs:label "processo de atuação"@pt-br .
:COPI_0000408 # ActuationProcess
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000392 # HydraulicFluid
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasInput ;
owl:someValuesFrom :COPI_0000045 # ControlSignal
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasSpecifiedOutput ;
owl:someValuesFrom :COPI_0000392 # HydraulicFluid
] .
### Equipment universal: HydraulicActuator
:COPI_0000298 rdf:type owl:Class ; # HydraulicActuator
rdfs:subClassOf :COPI_0000207 ; # Actuator
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart)
owl:someValuesFrom :COPI_0000407 # ActuationFunction
] ;
rdfs:label "hydraulic actuator"@en ;
rdfs:label "atuador hidráulico"@pt-br ;
iof-av:naturalLanguageDefinition "A hydraulic actuator is an actuator that converts hydraulic fluid pressure into mechanical motion through hydraulic power transmission."@en ;
skos:definition "A hydraulic actuator is an actuator that converts hydraulic fluid pressure into mechanical motion through hydraulic power transmission."@en ;
iof-av:naturalLanguageDefinition "Um atuador hidráulico é um atuador que converte pressão de fluido hidráulico em movimento mecânico através de transmissão de potência hidráulica."@pt-br ;
iof-av:isPrimitive "true"^^xsd:boolean ;
iof-av:primitiveRationale "Constructive classification based on hydraulic power source. Under Open World Assumption, asserting equivalence could incorrectly classify complex hydraulic-mechanical hybrid systems or specialized equipment containing hydraulic actuator components as standard hydraulic actuators."@en ;
rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000384 ] ;
skos:definition "[ISO 15926-4] A <HYDRAULIC ACTUATOR> is an <INSTRUMENTATION ITEM> and a <CONTROLLED ACTUATOR> and a <HYDRAULICALLY ACTUATED ARTEFACT>"@en ;
skos:definition "[CFIHOS] An actuator intended to be operated by hydraulic power."@en ;
skos:definition "[POSC Caesar] An actuator intended to be operated by hydraulic power."@en .
# Disjointness: HydraulicActuator and ElectricActuator
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000298 :COPI_0000260 ) . # HydraulicActuator, ElectricActuator
# Disjointness: HydraulicActuator and PneumaticActuator
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000298 :COPI_0000327 ) . # HydraulicActuator, PneumaticActuator
Axiomatization Decision Log
1
Identity-Giving Function
Function class
ActuationFunction
⊑ DesignedFunction
Realized in
ActuationProcess
⊑ PlannedProcess
Reusing the identity-giving function from the already-enriched 'actuator' class. All actuators, regardless of power source, share the fundamental function of converting control signals into mechanical motion.
2
Genus Determination
Actuator
The parent_candidates include 'actuator' which is already enriched in our ontology with ActuationFunction and Assembly genus. This is the most specific and appropriate superclass - hydraulic actuator is clearly a subtype of actuator differentiated by power source.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These parts are universal to hydraulic actuators regardless of specific configuration (linear/rotary) and are necessary for hydraulic operation.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
HydraulicFluid
— pressurized, incompressible
ControlSignal
— actuator positioning command
Outputs (O)
HydraulicFluid
— return fluid, lower pressure
Transformation (T)
hydraulic pressure energy converted to mechanical kinetic energy
Signature reflects the core hydraulic actuation process: pressurized hydraulic fluid input plus control signal produces mechanical motion output plus return fluid.
5
Axiom Mode Decision
Necessary conditions only
— modelled as a primitive universal
(⊑, SubClassOf). Identity is grounded in designed
function and cannot be reduced to a property checklist.
Constructive classification based on hydraulic power source. Under Open World Assumption, asserting equivalence could incorrectly classify complex hydraulic-mechanical hybrid systems or specialized equipment containing hydraulic actuator components as standard hydraulic actuators.
Disjointness Axioms
electric actuator
pneumatic actuator
C1: electric actuator, pneumatic actuator. Different power source types (hydraulic fluid vs. electrical current vs. compressed air) represent incompatible energy conversion mechanisms and cannot be simultaneously instantiated by the same actuator.
Cross-Standard Observations
All three sources consistently define hydraulic actuator by its hydraulic power operation principle. ISO 15926 provides the most comprehensive classification context, relating it to instrumentation and controlled actuation. The definitions are well-aligned across standards.
