Documentation

linqueryHasZeroIOPair

Query object for finding blocks with at least one input/output pair that linearizes to zero

Description

linqueryHasZeroIOPair creates a custom query object for finding all the blocks in a linearization result that have at least one input/output pair that linearizes to zero. For a zero input/output pair, a change in the input value has no effect on the output value.

When you linearize a Simulink® model, you can create a LinearizationAdvisor object that contains diagnostic information about individual block linearizations. To find block linearizations that satisfy specific criteria, you can use the find function with custom query objects. Alternatively, you can analyze linearization diagnostics using the Linearization Advisor in the Linear Analysis Tool. For more information on finding specific blocks in linearization results, see Find Blocks in Linearization Results Matching Specific Criteria.

Creation

Syntax

query = linqueryHasZeroIOPair

Description

example

query = linqueryHasZeroIOPair creates a query object for finding all the blocks in a LinearizationAdvisor object that have at least one input/output path that linearizes to zero.

Properties

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Query type, specified as 'Has Zero I/O Pair'.

Query description, specified as 'Blocks with a Zero IO Pair'. You can add your own description to the query object using this property.

Usage

After creating a linqueryHasZeroIOPair query object, you can:

  • Find all the blocks in a LinearizationAdvisor object that have at least one input/output path that linearizes to zero by using the linqueryHasZeroIOPair query directly with the find command.

  • Create a CompoundQuery object by logically combining the linqueryHasZeroIOPair query with other query objects.

Object Functions

findFind blocks in linearization results that match specific criteria

Examples

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Load the Simulink model.

mdl = 'scdspeed';
load_system(mdl)

Linearize the model and obtain the LinearizationAdvisor object.

opts = linearizeOptions('StoreAdvisor',true);
io(1) = linio('scdspeed/throttle (degrees)',1,'input');
io(2) = linio('scdspeed/rad//s to rpm',1,'output');
[sys,op,info] = linearize(mdl,io,opts);
advisor = info.Advisor;

Create query object, and find all blocks with at least one input/output path that linearizes to zero.

qZeroPair = linqueryHasZeroIOPair;
advZeroPair = find(advisor,qZeroPair)
advZeroPair = 
  LinearizationAdvisor with properties:

               Model: 'scdspeed'
      OperatingPoint: [1x1 opcond.OperatingPoint]
    BlockDiagnostics: [1x6 linearize.advisor.BlockDiagnostic]
           QueryType: 'Has Zero I/O Pair'

Alternative Functionality

App

You can also create custom queries for finding specific blocks in linearization results using the Linearization Advisor in the Linear Analysis Tool. For more information, see Find Blocks in Linearization Results Matching Specific Criteria.

Introduced in R2017b

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