The approach helps you meet diverse customer requirements that are governed by application, cost, or operational. In the following model, the signal label propagation for the output signal of the subsystem block uses the signal name bus1, which is the name of the output bus signal of the bus creator block. For example, see variant subsystems that contains a variant subsystem block controller. When a variant control evaluates to true, simulink activates the variant choice that.
Use variant subsystems to model and switch between different design choices. To change the value of the variant control variable, in the matlab command window, type v. They are in your model instead of a simulink library. How do i switch between child subsystems of a variant. Supports flexible io, so that all variants do not need to have the same number of input and output ports. A variant subsystem block can have model blocks as variants. The propagated signal label does not include the names of the bus element signals a and b. Define variant control variables that determine the condition under which a variant choice is active. A variant subsystem is now in the place of the matlab function block. You can mix model blocks and subsystem blocks as variant choices. Learn more about variant subsystem matlab, simulink, embedded coder. The new blocks have the same number of input and output ports as the containing. Learn more about variant, subsystems, programming simulink. By default, the copy without creating links to the configurable subsystem library check box is selected.
The variant configuration, or variant design, enables organizations to design product lines such as automobiles, aircraft, or electronics that satisfy diverse market needs, customer preferences, and geographic requirements, on a common platform. The key elements of the transmission are four synchronizers. Treat as grouped when propagating variant conditions option is on. The variant condition propagates to gain4 block but does not propagate to the sine wave1 block the scope block is unconditional and receives its inputs from the sine wave1 block. Variant objects are created in the matlab global workspace. Simulink software backpropagates dimensions, sample times and data types from downstream blocks unless you explicitly assign them values.
Identify configurable subsystem blocks for converting to variant subsystem blocks. The variability helps you develop a single, fixed master design with variable components. Variant objects association for the controller subsystem, rightclick on the controller subsystem and select subsystem parameters, which will open the controller subsystem block dialog. In simulink, you can use the variant blocks to create a single model that caters to. This topic describes the highlevel discreteevent control specification for a power window control. To programmatically control variant selection, a simulink. Propagating variant conditions to subsystems matlab. Problem in code generated for variant subsystem matlab. Suppose a block named myblock inside subsystem mysubsys masked by a selfmodifying mask depends on mask parameter myparam to update itself. Variant source and sink blocks are blocks with either multiple inputs and one output source or one input and multiple outputs sink. Oct 05, 2012 in the end it looks like you want build a model programitcally around the variant subsytem addingremoving inports outports grounds and lines.
Furthermore, to find out what you can and cannot do with the variant subsystem, you can click the subsystem and then go to the matlab command window and type. In simulink, you can represent and manage variant designs within a single block diagram. Condition propagation with variant subsystem matlab. When you specify variant conditions in models containing variant subsystem blocks, simulink propagates these conditions to determine which components of. This example shows how to use a masked variant subsystem block in a simulink model.
A variant subsystem block contains two or more child subsystems where one child is active during model execution. Nov 29, 2017 hello, i got a model based on variant subsystems. I used a variant subsystem with a mask to allow a user to choose which subsystem to use i have three questions that is really confusing me 1 my subsystem has different number of input ports but when i choose a subsystem, i do not see that the top level variant subsystem block removes or adds the input port. In the same lines one could also explore the possibility to use the simulink variant subsystems feature that allows to switch active subsystems based on the condition specified on the base workspace, if the intention is to simulate the subsystems by having them in the same model and as nirmal suggested after this go ahead and use the matlab. May 29, 2018 the variant control names can be found by rightclicking on the variant subsystem block parameters subsystem, in the variant control column. A user cannot view the contents of the library subsystem, modify the reference subsystem, or change reference.
You can specify variants that have different numbers of input and output ports. Click the open model button located on the top right corner to view the. Configurable subsystem blocks in a model can be converted to variant subsystem blocks programmatically using converttovariant method when a configurable subsystem is converted to a variant subsystem block, the block choice of configurable subsystem block is changed to. In this example, there are two models that are potentially referenced by the variant subsystem block named controller. Variant object in the global scope workspace of the model. The variant subsystem block is wrapped within a masked subsystem block. When the treat as grouped when propagating variant conditions checkbox is clear, the subsystem is an ungrouped virtual subsystem a grouped subsystem represents a system of equation and hence the propagated conditions also. You can specify how simulink labels the ports of a subsystem. When the treat as grouped when propagating variant conditions checkbox is clear, the subsystem is an ungrouped virtual subsystem a grouped subsystem represents a system of equation and. The linear choice is using sensor1 and sensor3 inputs of the controller variant.
Then, configure the trigger block to execute a subsystem or model. In simulink, programmatically create a variant subsystem. Simulation using the nonlinear controller variant enumerations and reuse. Simulink tutorial 54 variant subsystem matlab programming. The stop on both sides block uses a terminator to stop the variant condition propagation on upstream of the subsystem block.
The trigger block adds an external signal to control the execution of a subsystem or a model. To enable this functionality, add this block to a subsystem block or at the root level of a model that is referenced in a model block. I want to use scripting to create and define a variant subsystem in simulink. Define, configure, and activate variants represent variant choices. Add trigger or function port to subsystem or model. Search the model to identify configurable subsystem blocks at the model or subsystem level. You specify variant controls for each variant choice represented in a variant subsystem or model variant block. Convert matlab function block to fixed point matlab. Doubleclick the controller block to view its contents. Program a variant subsystem matlab answers matlab central. A subsystem block becomes a grouped virtual subsystem when you select the treat as grouped when propagating variant conditions checkbox in the block parameters dialog box. Design and implement state machines and complex logic graphically that are concise and easy to understand, communicate, and maintain. The configurable subsystem blocks in existing models must be converted to variant subsystem blocks.
When i insert needed subsystems by hand and delete the rest it works fine. This promoted parameter records the variant choice specified from the masked. The components of a simulink model that contain variants are activated or. Allows you to mix model and subsystem blocks as variant systems. How to increase performance of variant subsystems learn more about matlab, simulink simulink. For a given variant subsystem or model variant block, only one variant control can evaluate to true at a. Variant choices are two or more configurations of a component in your model. Here is an image giving an overview of the variant subsystem.
Variant object is associated with each child subsystem in the variant subsystem block dialog. The labels are the names of the inport and outport blocks that connect the subsystem to blocks outside of the subsystem. Mathworks is the leading developer of mathematical computing software for engineers and scientists. You can model the discreteevent control of the window with a stateflow chart. By default, simulink labels ports on a subsystem block. To stop the condition propagation on the downstream side of the subsystem block, one of the inports is connected to ground unconditional. To convert a model block that contains variant models to a variant subsystem. Mathworks is the leading developer of mathematical computing software. In the property editor, in the dialog section, add the following callback. Mathworks is the leading developer of mathematical computing software for. Simulink variants provide increased functionality over configurable subsystems. In the library window, on the library tab, click locked library to unlock the library on the subsystem block tab, in the mask group, click edit mask. The variant source1 block has the a1 condition, which propagates backward and forward to the blocks connected to variant source1 block.
Change number of ports based on variant subsystem choice. Variant source5 and a virtual subsystem subsystem4. Simulink creates empty subsystem blocks inside the variant subsystem block. To activate a variant choice, type the variant choice in matlab. Create custom model versions to support different specifications, without duplication. Therefore, this arrangement stops the variant condition propagation upstream and. All i got was activevariant and similar things but i didnt manage to read the variant choices table which contains the connection between name, variant object and condition. How can i use parsim in combination with a simulink. Subsystem4 has a sine wave connected to a to workspace1 and outport blocks. This link is the first of a series of posts on how to use mask parameters to make changes to blocks inside of the system. Create a mask for the variant subsystem right click on the variant subsystem mask create mask. Specify conditions that control variant selection matlab. If you are a user of configurable subsystems, it is time to start thinking about making the switch to variant systems simulink variants provide increased functionality over configurable subsystems.
If you are a user of configurable subsystems, it is time to start thinking about making the switch to variant systems. Variant objects association for the controller subsystem, rightclick on the controller subsystem and select subsystem parameters, which will open the controller subsystem block dialog the controller subsystem block dialog specifies two potential variants. A user can view the contents of the library subsystem but cannot modify the reference subsystem without disabling its library link or changing its readwrite permissions to readwrite noreadorwrite. This example shows a vehicle that has a fourspeed manual transmission. A stateflow chart is a finite state machine with hierarchy and parallelism. I tried to read the subsystem parameters of a variant subsystem i created. Matlab enumeration classes can be used to improve readability in the conditions of the variant object. The variant subsystem contains both floatingpoint and fixedpoint versions of the matlab function block. Variant subsystems offer more capabilities than configurable subsystems, with these advantages. I have explained how to create a variant and how to use it in variant subsystem. In the same lines one could also explore the possibility to use the simulink variant subsystems feature that allows to switch active subsystems based on the condition specified on the base workspace, if the intention is to simulate the subsystems by having them in the same model and as nirmal suggested after this. The pv system model used for simulation consists of the pv panel, variant subsystem of irradiance, buck converter and variant subsystem of mppt controller. These objects have a property named condition, which is an expression, that evaluates to a boolean value and is used to. Rightclick the variant subsystem block that is the container for variant choices in your model and select block parameters subsystem in the block parameters dialog box, in the variant control column, select default next to one of the choices simulink verifies that only one variant choice is active for simulation.
The variants comprise a set of models that have the potential to be referenced by the variant subsystem block. A variant control comprises one or more variant control variables, specified using matlab variables or simulink. The active version is automatically controlled by the fixedpoint tool based on the data type override settings of the model. You are now following this submission you will see updates in your. Matlab software 88 matlab videos 285 matlb software 5 matrix 4 mde 2. This mask dialog box callback adds or removes input ports inside the masked. I got one extremely big variant subsystem, so the model crashes during compiling. Mathworks is the leading developer of mathematical computing software for engineers and.
Convert configurable subsystem to variant subsystem matlab. They can be controlled programmatically via variables in the matlab workspace. Designing superconducting systems using matlab and simulink. For the variant subsystem, it can contain a set of variant implementations and only one of them can be active at a time. How can i use parsim in combination with a simulink variant. Time to convert to variant subsystems guy on simulink. The two variants are in turn associated with the two. This example shows how to represent variant choices inside a variant subsystem block in your model. Verify that the propagate condition outside of variant subsystem check box is selected. Propagate variant conditions outside of variant subsystem block. Convert configurable subsystem to variant subsystem. By engaging or disengaging these synchronizers and associated dog clutches, the transmission provides four ratios 3. Identify variant model blocks and convert those to variant subsystem containing model block choices. Convert configurable subsystem blocks to variant subsystem blocks programmatically.
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