Model-based development workflow in Simulink - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the model simulation.

Simulink

sim('[1]')

Drag options to blanks, or click blank then click option'

ArunSim

BstartModel

Cexecute

DmyModel

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name instead of the model name.

Not putting the model name in quotes.

The sim function runs the Simulink model specified by its name as a string. Here, myModel is the model name.

2fill in blank

medium

Complete the code to load the Simulink model into memory.

Simulink

load_system('[1]')

Drag options to blanks, or click blank then click option'

AstartModel

BrunSim

CmyModel

Dexecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function name instead of the model name.

Not using quotes around the model name.

The load_system function loads the Simulink model specified by its name as a string without opening the graphical interface.

3fill in blank

hard

Fix the error in the code to save the model after changes.

Simulink

save_system('[1]')

Drag options to blanks, or click blank then click option'

AmyModel

BrunSim

Cexecute

DstartModel

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to save with a function name instead of the model name.

Forgetting to put the model name in quotes.

The save_system function saves the Simulink model specified by its name as a string. This is necessary to keep changes.

4fill in blank

hard

Fill both blanks to create a dictionary of block names and their parameter values.

Simulink

params = {blk: get_param(blk, '[1]') for blk in [2]

Drag options to blanks, or click blank then click option'

AName

BParameters

Cblocks

DblockList

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect parameter names.

Using a variable name that does not exist.

The get_param function retrieves the value of a parameter (here 'Name') for each block in the list blocks.

5fill in blank

hard

Fill all three blanks to filter blocks with a specific parameter value.

Simulink

filtered = [blk for blk in [1] if get_param(blk, '[2]') == '[3]']

Drag options to blanks, or click blank then click option'

Ablocks

BBlockType

CGain

DblockList

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong parameter names or values.

Using a variable that is not a list of blocks.

This code filters the list blockList to include only blocks whose 'BlockType' parameter equals 'Gain'.

Practice

1. What is the main purpose of using a model-based development workflow in Simulink?

easy

A. To replace hardware testing completely

B. To design and test systems visually before coding

C. To only generate reports from data

D. To write code manually without simulation

Solution

1. Step 1: Understand model-based development

   Model-based development uses visual blocks to create system models.

2. Step 2: Identify the workflow goal

   The goal is to design and test systems visually before writing code.

3. Final Answer:

   To design and test systems visually before coding -> Option B

4. Quick Check:

   Model-based development = Visual design and testing [OK]

Hint: Model-based means design visually, not just code [OK]

Common Mistakes:

• Thinking it only generates reports
• Assuming no simulation is involved
• Believing it replaces all hardware testing

2. Which of the following is the correct first step in a Simulink model-based development workflow?

easy

A. Generate code automatically

B. Deploy the model to hardware

C. Create a visual model using blocks

D. Write manual test scripts

Solution

1. Step 1: Identify the workflow sequence

   The first step is to create a visual model using blocks in Simulink.

2. Step 2: Understand next steps

   Code generation and deployment come after modeling and testing.

3. Final Answer:

   Create a visual model using blocks -> Option C

4. Quick Check:

   First step = Build model [OK]

Hint: Start by building the model visually [OK]

Common Mistakes:

• Trying to generate code before modeling
• Deploying before testing
• Writing manual scripts instead of modeling

3. Given the following Simulink workflow steps: 1) Create model, 2) Simulate model, 3) Generate code, 4) Deploy code. What is the output after step 2?

medium

A. Error logs from deployment

B. Executable code for hardware

C. Visual blocks for model creation

D. Simulation results showing system behavior

Solution

1. Step 1: Identify step 2 in the workflow

   Step 2 is to simulate the model, which runs the system virtually.

2. Step 2: Determine simulation output

   Simulation produces results showing how the system behaves.

3. Final Answer:

   Simulation results showing system behavior -> Option D

4. Quick Check:

   Simulation output = Behavior results [OK]

Hint: Simulation shows system behavior, not code [OK]

Common Mistakes:

• Confusing simulation with code generation
• Expecting executable code after simulation
• Thinking deployment errors appear before deployment

4. You created a Simulink model and tried to generate code, but got an error saying 'Model contains unresolved references'. What should you do to fix this?

medium

A. Check and resolve all block references and dependencies

B. Ignore the error and deploy the model

C. Delete the model and start over

D. Skip simulation and generate code again

Solution

1. Step 1: Understand the error meaning

   'Unresolved references' means some blocks or data sources are missing or not linked.

2. Step 2: Fix the references

   Check all blocks and dependencies to ensure they are correctly connected and available.

3. Final Answer:

   Check and resolve all block references and dependencies -> Option A

4. Quick Check:

   Fix references before code generation [OK]

Hint: Resolve all missing links before code generation [OK]

Common Mistakes:

• Ignoring errors and proceeding
• Deleting model unnecessarily
• Skipping simulation thinking it fixes errors

5. You want to speed up your development by automatically generating code from your Simulink model and deploying it to hardware. Which sequence correctly represents the model-based development workflow?

hard

A. Create model -> Simulate model -> Generate code -> Deploy code

B. Simulate model -> Create model -> Generate code -> Deploy code

C. Create model -> Generate code -> Simulate model -> Deploy code

D. Generate code -> Create model -> Simulate model -> Deploy code

Solution

1. Step 1: Identify correct workflow order

   The correct order starts with creating the model, then simulating it to test behavior.

2. Step 2: Follow with code generation and deployment

   After successful simulation, generate code and deploy to hardware.

3. Final Answer:

   Create model -> Simulate model -> Generate code -> Deploy code -> Option A

4. Quick Check:

   Workflow order = Model, simulate, code, deploy [OK]

Hint: Model first, simulate second, then code and deploy [OK]

Common Mistakes:

• Generating code before simulation
• Deploying before code generation
• Simulating after code generation