systemcomposer.analysis.ArchitectureInstance - Architecture in analysis instance - MATLAB (original) (raw)

Architecture in analysis instance

Description

An ArchitectureInstance object represents an instance of an architecture.

Creation

Create an instance of an architecture using the instantiate function.

instance = instantiate(model.Architecture,'LatencyProfile','NewInstance', ... 'Function',@calculateLatency,'Arguments','3','Strict',true, ... 'NormalizeUnits',false,'Direction','PreOrder')

Properties

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Name of instance, specified as a character vector.

Example: 'NewInstance'

Data Types: char

Parameters in instance, specified as an array of systemcomposer.analysis.InstanceParameter objects.

Whether units normalize the value of properties in the instantiation, specified as1 (true) or 0 (false).

Data Types: logical

Whether instances get properties if the specification of the instance has the stereotype applied, specified as 1 (true) or 0 (false).

Data Types: logical

Analysis function, specified as the MATLAB function handle to be executed when analysis is run.

Example: @calculateLatency

Analysis direction, specified as one of the following enumerations:

or a character vector of one of the following options:'TopDown', 'PreOrder','PostOrder', or 'BottomUp'

Data Types: enum | char

Analysis arguments, specified as a character vector of optional arguments to the analysis function.

Example: '3'

Data Types: char

Whether analysis viewer updates automatically when the design model changes, specified as 1 (true) or 0 (false).

Data Types: logical

Object Functions

Examples

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Create an instantiation for analysis for a system with latency in its wiring. The materials used are copper, fiber, and Wi-Fi®.

Create Latency Profile with Stereotypes and Properties

Create a System Composer™ profile with a base, connector, component, and port stereotype. Add properties with default values to each stereotype as needed for analysis.

profile = systemcomposer.profile.Profile.createProfile("LatencyProfileC");

Add a base stereotype with properties.

latencybase = profile.addStereotype("LatencyBase"); latencybase.addProperty("latency",Type="double"); latencybase.addProperty("dataRate",Type="double",DefaultValue="10");

Add a connector stereotype with properties.

connLatency = profile.addStereotype("ConnectorLatency",... Parent="LatencyProfileC.LatencyBase"); connLatency.addProperty("secure",Type="boolean",DefaultValue="true"); connLatency.addProperty("linkDistance",Type="double");

Add a component stereotype with properties.

nodeLatency = profile.addStereotype("NodeLatency",... Parent="LatencyProfileC.LatencyBase"); nodeLatency.addProperty("resources",Type="double",DefaultValue="1");

Add a port stereotype with properties.

portLatency = profile.addStereotype("PortLatency",... Parent="LatencyProfileC.LatencyBase"); portLatency.addProperty("queueDepth",Type="double",DefaultValue="4.29"); portLatency.addProperty("dummy",Type="int32");

Instantiate Using Analysis Function

Create a new model and apply the profile. Create components, ports, and connections in the model. Apply stereotypes to the model elements. Finally, instantiate using the analysis function.

model = systemcomposer.createModel("archModel"); systemcomposer.openModel("archModel")

ans = Model with properties:

               Name: 'archModel'
     SimulinkHandle: 153.0012
       Architecture: [1×1 systemcomposer.arch.Architecture]
           Profiles: [0×0 systemcomposer.profile.Profile]
InterfaceDictionary: [1×1 systemcomposer.interface.Dictionary]
              Views: [0×0 systemcomposer.view.View]
       Interactions: [0×0 systemcomposer.interaction.Interaction]

arch = model.Architecture;

Apply profile to model.

model.applyProfile("LatencyProfileC");

Create components, ports, and connections.

componentSensor = addComponent(arch,"Sensor"); sensorPorts = addPort(componentSensor.Architecture,{'MotionData','SensorPower'},{'in','out'});

componentPlanning = addComponent(arch,"Planning"); planningPorts = addPort(componentPlanning.Architecture,... {'Command','SensorPower','MotionCommand'},... {'in','in','out'}); componentMotion = addComponent(arch,"Motion"); motionPorts = addPort(componentMotion.Architecture,... {'MotionCommand','MotionData'},{'in','out'});

c_sensorData = connect(arch,componentSensor,componentPlanning); c_motionData = connect(arch,componentMotion,componentSensor); c_motionCommand = connect(arch,componentPlanning,componentMotion);

Clean up the canvas.

Simulink.BlockDiagram.arrangeSystem("archModel");

Batch apply stereotypes to model elements.

batchApplyStereotype(arch,"Component","LatencyProfileC.NodeLatency"); batchApplyStereotype(arch,"Port","LatencyProfileC.PortLatency"); batchApplyStereotype(arch,"Connector","LatencyProfileC.ConnectorLatency");

Instantiate using the analysis function.

instance = instantiate(model.Architecture,"LatencyProfileC","NewInstance",... Function=@calculateLatency,Arguments="3", ... Strict=true,NormalizeUnits=false,Direction="PreOrder")

instance = ArchitectureInstance with properties:

    Specification: [1×1 systemcomposer.arch.Architecture]
         IsStrict: 1
   NormalizeUnits: 0
 AnalysisFunction: @calculateLatency
AnalysisDirection: PreOrder
AnalysisArguments: '3'
  ImmediateUpdate: 0
      listenerFnc: []
       Components: [1×3 systemcomposer.analysis.ComponentInstance]
            Ports: [0×0 systemcomposer.analysis.PortInstance]
       Connectors: [1×3 systemcomposer.analysis.ConnectorInstance]
       Parameters: [0×0 systemcomposer.analysis.InstanceParameter]
             Name: 'NewInstance'

Inspect Component, Port, and Connector Instances

Get properties from component, port, and connector instances.

defaultResources = instance.Components(1).getValue("LatencyProfileC.NodeLatency.resources")

defaultSecure = instance.Connectors(1).getValue("LatencyProfileC.ConnectorLatency.secure")

defaultSecure = logical 1

defaultQueueDepth = instance.Components(1).Ports(1).getValue("LatencyProfileC.PortLatency.queueDepth")

defaultQueueDepth = 4.2900

Overview

Model a typical automotive electrical system as an architectural model and run a primitive analysis. The elements in the model can be broadly grouped as either a source or a load. Various properties of the sources and loads are set as part of the stereotype. This example uses the iterate method of the specification API to iterate through each element of the model and run analysis using the stereotype properties.

Structure of Model

The generator charges the battery while the engine is running. The battery and the generator support the electrical loads in the vehicle, like ECU, radio, and body control. The inductive loads like motors and other coils have the InRushCurrent stereotype property defined. Based on the properties set on each component, the following analyses are performed:

Load Model and Run Analysis

archModel = systemcomposer.loadModel('scExampleAutomotiveElectricalSystemAnalysis');

Instantiate battery sizing class used by the analysis function to store analysis results.

objcomputeBatterySizing = computeBatterySizing;

Run the analysis using the iterator.

archModel.iterate('Topdown',@computeLoad,objcomputeBatterySizing)

Display analysis results.

objcomputeBatterySizing.displayResults

Total KeyOffLoad: 158.708 mA Number of days required for KeyOffLoad to discharge 30% of battery: 55.789. Total CrankingInRush current: 70 A Total Cranking current: 104 A CCA of the specified battery is sufficient to start the car at 0 F.

ans = computeBatterySizing with properties:

totalCrankingInrushCurrent: 70
      totalCrankingCurrent: 104
    totalAccesoriesCurrent: 71.6667
           totalKeyOffLoad: 158.7080
                batteryCCA: 500
           batteryCapacity: 850
        puekertcoefficient: 1.2000

scExampleAutomotiveElectricalSystemAnalysis_m_01.png

Close Model

bdclose('scExampleAutomotiveElectricalSystemAnalysis');

More About

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Term Definition Application More Information
Analysis Static analysis analyzes the structure of the system to quantitatively evaluate an architecture for certain characteristics. Static analysis uses an analysis function and parametric values of properties and parameters captured in the system model. Use analyses to calculate overall reliability, mass roll-up, performance, or thermal characteristics of a system, or to perform a size, weight, and power (SWaP) analysis to increase efficiency. Analyze Architecture Model Properties with Analysis FunctionAnalyze ArchitectureSimple Roll-Up Analysis Using Robot System with Properties
Analysis function An analysis function is a MATLAB function that computes values necessary to evaluate the architecture using the properties of each element in the model instance and instance-specific parameters at the component and architecture levels. Use an analysis function to calculate the result of an analysis. Analysis Function ConstructsWrite Analysis Function
Instance model An instance model is a collection of instances. You can update an instance model with changes to a model, but the instance model will not update with changes in active variants or model references. You can use an instance model, saved in a MAT file, of a System Composer™ architecture model for analysis. Run Analysis Function
Instance An instance is an occurrence of an architecture model element at a given point in time. An instance freezes the active variant or model reference of the component in the instance model. Create a Model Instance for Analysis
Term Definition Application More Information
Architecture A System Composer architecture represents a system of components and how they interface with each other structurally and behaviorally. Different types of architectures describe different aspects of systems. You can use views to visualize a subset of components in an architecture. You can define parameters on the architecture level using the Parameter Editor. Compose Architectures VisuallyAuthor Parameters in System Composer Using Parameter Editor
Root A root is at the top of an architecture hierarchy. A root architecture has a boundary defined by its architecture ports that surround the system of interest. The root architecture has a system boundary surrounding your architecture model. You can add architecture ports that define interfaces across the boundary. Compose Architectures Visually
Model A System Composer model is the file that contains architectural information, such as components, ports, connectors, interfaces, and behaviors. Perform operations on a model including extracting root-level architecture, applying profiles, linking interface data dictionaries, or generating instances from model architecture. A System Composer model is stored as an SLX file. Create Architecture Model with Interfaces and Requirement Links
Component A component is a replaceable part of a system that fulfills a clear function in the context of an architecture. A component defines an architectural element, such as a function, another system, hardware, software, or other conceptual entity. A component can also be a subsystem or subfunction. Represented as a block, a component is a part of an architecture model that can be separated into reusable artifacts. Transfer information between components with port interfaces using the Interface Editor, and parameters using the Parameter Editor. Compose Architectures Visually
Port A port is a node on a component or architecture that represents a point of interaction with its environment. A port permits the flow of information to and from other components or systems. Component ports are interaction points on the component to other components. Architecture ports are ports on the boundary of the system, whether the boundary is within a component or the overall architecture model. The root architecture has a boundary defined by its ports. Compose Architectures Visually
Connector Connectors are lines that provide connections between ports. Connectors describe how information flows between components or architectures. A connector allows two components to interact without defining the nature of the interaction. Set an interface on a port to define how the components interact. Compose Architectures Visually

Version History

Introduced in R2019a

See Also

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