Simulate First & Second Order PID Closed-Loop Systems in Scilab Xcos | Tutorial

How to Simulate First and Second Order PID Closed-Loop Systems in Scilab Xcos + Editing and Exporting Figures

If you’re an engineering student or a control systems enthusiast looking for a free and powerful tool to simulate PID controllers, Scilab Xcos is an excellent choice. In this post, I’ll walk you through a step-by-step guide on how to simulate first and second order PID closed-loop systems using Scilab’s Xcos toolbox. Additionally, you’ll learn how to edit, copy, and export the simulation figures for your reports or presentations.

What is Scilab and Xcos?

Scilab is an open-source software similar to MATLAB, widely used for numerical computations. Xcos is Scilab’s graphical editor to model and simulate dynamic systems using block diagrams, making it a fantastic environment for control system simulation.

What You Will Learn in This Tutorial:

• How to set up and simulate first-order and second-order systems with PID controllers
• How to run closed-loop simulations in Xcos
• Techniques to edit simulation output figures to improve clarity and presentation
• How to copy and export figures from Scilab for external use

Step 1: Setting up the PID Controller in Xcos

Open Scilab and launch the Xcos toolbox. You’ll find blocks for PID controllers under the ‘Continuous Time’ palette.

1. Drag and drop the PID block into your workspace.
2. Connect it with your system blocks representing first or second order dynamics (like transfer function blocks).
3. Set the PID parameters (Proportional, Integral, Derivative gains) as per your control design.

Step 2: Simulating First and Second Order Systems

For a first-order system, use a simple transfer function with one pole, e.g., 1/(s+1).

For a second-order system, set up a transfer function with two poles, e.g., 1/(s^2 + 2ζω_ns + ω_n^2).

Connect these systems to your PID controller in a closed-loop configuration and run the simulation.

Step 3: Running Closed-Loop Simulation

Once everything is connected, run the simulation in Xcos. You will see output plots of your system’s response over time.

Step 4: Editing the Figures

Scilab allows you to customize your plots. You can add titles, axis labels, gridlines, and change colors or line styles to make your figures clearer.

Step 5: Copying and Exporting Figures

• Use the copy figure option to paste it into other software (like Word or PowerPoint).
• Export the figure directly as image files (.png, .jpg) or PDFs for high-quality prints.

Why Use Scilab Xcos for PID Simulation?

• Free and Open Source: No costly licenses required
• User-Friendly Graphical Interface: Easy drag-and-drop block diagram modeling
• Powerful Simulation Capabilities: Suitable for both beginners and advanced users
• Great for Control Systems Education: Perfect for academic projects and research

Final Thoughts

Simulating PID controllers using Scilab Xcos is a practical skill for anyone diving into control systems. The ability to edit and export your figures means you can easily create professional reports or presentations without additional software.

If you found this tutorial helpful, please watch the video

NPTEL GATE Website for GATE 2026 Mathematics | Free Lectures + Tests

GATE 2026 Mathematics: Free NPTEL Syllabus-Wise Lectures & Mock Tests

Are you preparing for GATE 2026 Mathematics and looking for the best free resources? Look no further! The NPTEL GATE website offers an incredible collection of syllabus-wise video lectures and mock tests designed specifically for GATE aspirants.

Why Choose NPTEL for GATE 2026 Mathematics Preparation?

NPTEL (National Programme on Technology Enhanced Learning) is a government initiative that provides high-quality online courses from top Indian Institutes of Technology (IITs) and Indian Institute of Science (IISc). The GATE-specific content is curated to match the latest syllabus, making it an ideal resource for thorough preparation.

What Does the NPTEL GATE Website Offer?

• Detailed Video Lectures: Expert professors explain every topic in the GATE 2026 Mathematics syllabus in easy-to-understand language.
• Mock Tests & Practice Questions: Regular tests help you gauge your preparation and identify weak areas.
• Self-Paced Learning: Learn at your own speed and revisit difficult topics anytime.
• Free Access: All courses and materials are available online for free.

How to Get Started?

Follow these simple steps to start using NPTEL for your GATE Mathematics preparation:

1. Visit the official NPTEL website.
2. Search for the GATE 2026 Mathematics courses under the Engineering or Mathematics section.
3. Enroll in the courses and start watching the video lectures syllabus-wise.
4. Take the mock tests available to practice and assess your knowledge.

Tips to Maximize Your GATE 2026 Maths Prep Using NPTEL

• Stick to a study schedule to cover all syllabus topics before the exam.
• Take notes while watching lectures for quick revision later.
• Attempt mock tests regularly to improve speed and accuracy.
• Discuss doubts in online forums or study groups.

By using the NPTEL GATE website, you get access to a trusted, comprehensive resource that can boost your preparation and help you crack GATE 2026 Mathematics with confidence.

Happy Studying and Best of Luck!

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Prepare for GATE 2026 Electrical Engineering with Confidence!

Consistent practice and smart strategies are the keys to cracking the GATE 2026 Electrical Engineering exam. One of the best ways to gauge your preparation level is by solving mock tests that follow the real exam pattern.

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• Pause the video after each question to solve it yourself.
• Note your answers and then check with the answer key.
• Focus on core topics like Electrical Machines, Power Systems, Control Systems, and Analog Electronics.
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Besides helping you practice, this post also includes useful tips for approaching mock tests effectively and links to additional resources such as previous year question papers and recommended textbooks.

Whether you are just starting your GATE preparation or want to assess your progress before the exam, this NPTEL mock test question and answer key video will be a valuable part of your study routine.

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Although detailed step-by-step solutions are not included, this format helps you test your understanding quickly and effectively. Here are some tips to maximize your practice:

• Pause the video after each question to solve it yourself.
• Note your answers and then check with the answer key.
• Focus on core topics like Electrical Machines, Power Systems, Control Systems, and Analog Electronics.
• Complement this practice with NPTEL’s free online lectures and other study materials.

Besides helping you practice, this post also includes useful tips for approaching mock tests effectively and links to additional resources such as previous year question papers and recommended textbooks.

Whether you are just starting your GATE preparation or want to assess your progress before the exam, this NPTEL mock test question and answer key video will be a valuable part of your study routine.

Good luck with your GATE 2026 preparation! Feel free to leave a comment below if you want full solutions or topic-wise mock tests.

This video description and blog content were created with the assistance of AI language models to provide clear, informative, and well-structured information for GATE 2026 Electrical Engineering aspirants.

NPTEL GATE EE Mock Test 2026 | 24-08-2025 | Questions & Answer Key Only

Prepare for GATE 2026 Electrical Engineering with Confidence!

Consistent practice and smart strategies are the keys to cracking the GATE 2026 Electrical Engineering exam. One of the best ways to gauge your preparation level is by solving mock tests that follow the real exam pattern.

In this post, we bring you the NPTEL GATE Electrical Engineering Mock Test 2026 questions along with the official answer key. This is an excellent resource for aspirants who want to practice high-quality questions directly from the trusted NPTEL platform.

Video Highlights:
- Complete set of mock test questions
- Official answer key included (no detailed solutions)
- Ideal for quick self-assessment and revision

Although detailed step-by-step solutions are not included, this format helps you test your understanding quickly and effectively. Here are some tips to maximize your practice:

• Pause the video after each question to solve it yourself.
• Note your answers and then check with the answer key.
• Focus on core topics like Electrical Machines, Power Systems, Control Systems, and Analog Electronics.
• Complement this practice with NPTEL’s free online lectures and other study materials.

Besides helping you practice, this post also includes useful tips for approaching mock tests effectively and links to additional resources such as previous year question papers and recommended textbooks.

Whether you are just starting your GATE preparation or want to assess your progress before the exam, this NPTEL mock test question and answer key video will be a valuable part of your study routine.

Good luck with your GATE 2026 preparation! Feel free to leave a comment below if you want full solutions or topic-wise mock tests.

This video description and blog content were created with the assistance of AI language models to provide clear, informative, and well-structured information for GATE 2026 Electrical Engineering aspirants.

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First-Order System PID Controller Design | Simulink Tutorial

What is a First-Order System?

Before diving into the PID controller design, it's important to understand what a first-order system is. A first-order system is a dynamic system that can be described by a first-order differential equation. It typically has one energy storage element, such as a capacitor in an electrical system or a mass in a mechanical system.

The transfer function of a first-order system is generally represented as:

G(s) = K / (τs + 1)

Where:

• K is the system gain.
• τ is the time constant.
• s is the Laplace transform variable.

Why Use PID Controllers?

A PID controller helps in adjusting the output of a system by minimizing the error between the desired setpoint and the system's actual output. It does this by using three control actions:

• Proportional (P): Responds to the current error.
• Integral (I): Addresses the accumulation of past errors.
• Derivative (D): Predicts future errors based on the rate of change.

The goal of a PID controller is to ensure that the system responds quickly to changes while avoiding overshoot and oscillations.

PI, PD, and PID Controllers: What's the Difference?

While PID is the most widely used controller, in some cases, simpler controllers like PI and PD are preferred. Each type of controller offers different benefits, depending on the system and the desired outcome.

1. Proportional-Integral (PI) Controller

Components:

• Proportional (P): Responds to the current error.
• Integral (I): Accumulates past errors over time to eliminate steady-state error.

Use Case: The PI controller is often used when a system needs to eliminate steady-state error (the difference between the desired setpoint and the actual output). It is especially useful when there's a constant or persistent error, but where the derivative action (which reacts to rate of change) isn't necessary.

Advantages:

• Helps eliminate steady-state error.
• Simpler than PID since it doesn’t use derivative action.

Disadvantages:

• May still have some overshoot or slower response compared to PID.
• Not ideal for systems with rapid changes or where derivative action is necessary.

2. Proportional-Derivative (PD) Controller

Components:

• Proportional (P): Responds to the current error.
• Derivative (D): Reacts to the rate of change of the error.

Use Case: PD controllers are used in systems where rapid response is required, and eliminating overshoot or oscillation is important. The derivative action anticipates future errors, which helps in reducing overshoot and improving system stability.

Advantages:

• Faster response and less overshoot compared to PI controllers.
• Better for systems with noise or systems requiring quick adjustments.

Disadvantages:

• Does not eliminate steady-state error.
• Sensitive to noise in the system, as derivative action amplifies high-frequency noise.

3. Proportional-Integral-Derivative (PID) Controller

Components:

• Proportional (P): Responds to the current error.
• Integral (I): Addresses the accumulation of past errors.
• Derivative (D): Predicts future errors based on the rate of change.

Use Case: PID controllers are the most common in industry due to their ability to handle both transient and steady-state errors. They are suitable for a wide range of applications where a system needs quick response times, minimal overshoot, and elimination of steady-state error.

Advantages:

• Eliminates steady-state error and reduces overshoot.
• Provides a well-rounded solution for most control systems.

Disadvantages:

• More complex than PI or PD controllers.
• Requires careful tuning of all three gains (P, I, D) to achieve optimal performance.

Step-by-Step Guide to PID Controller Design in Simulink

1. Setting Up Simulink

Start by opening MATLAB and Simulink. If you don't have Simulink installed, make sure to install it via MATLAB’s Add-Ons. Create a new model in Simulink by selecting File > New > Model.

2. Building the First-Order System Model

To model a first-order system in Simulink, follow these steps:

• Drag and drop a Transfer Function block from the Simulink > Continuous library.
• Set the transfer function to G(s) = K / (τs + 1), where K is the system gain and τ is the time constant.
• You can use a Step block to input a step signal into the system, representing the desired setpoint.

3. Designing the PID Controller

To implement the PID controller:

• From the Simulink > Continuous library, drag a PID Controller block into your model.
• Connect the output of the first-order system to the input of the PID controller.
• Adjust the PID gains (Proportional, Integral, and Derivative) based on the system's behavior. You can manually tune the PID values or use Simulink’s auto-tuning feature to optimize the gains.

4. Connecting the System

The next step is to connect the blocks:

• Connect the output of the PID controller to the input of the first-order system.
• Add a Scope block to visualize the output response and track how well the system reaches the setpoint.
• Ensure that the feedback loop is complete, where the output of the first-order system is compared with the setpoint.

5. Simulation and Tuning

Run the simulation and observe the system’s response. You'll likely need to adjust the PID controller’s parameters to achieve the desired performance. Key things to look out for:

• Overshoot: The peak that occurs when the system surpasses the desired setpoint.
• Steady-State Error: The error that remains after the system has settled.
• Settling Time: The time it takes for the system to stabilize around the setpoint.

Use the PID Tuner in Simulink to automatically optimize the controller parameters if necessary. This tool can help you fine-tune the proportional, integral, and derivative gains to minimize the error and improve performance.

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Answer :A and D

Advancements in Electrical Vehicles: A Sustainable and Innovative Future

 Advancements in 

Electrical Vehicles: 

A Sustainable and Innovative Future

In today's world, sustainability and technological advancements are crucial factors in shaping industries. Electrical engineering is at the forefront of innovation, and the rapid evolution of electrical vehicles (EVs) is garnering attention worldwide. As the automotive landscape transitions from fossil fuels to cleaner alternatives, let us explore the exciting trends shaping the future of EVs and their impact on electrical engineering.

Photo by Kindel Media from Pexels: https://www.pexels.com/photo/electric-cars-charging-on-stations-9800029/

1. **Lithium-ion Battery Advancements:**

The lithium-ion battery is the heart of every EV, and its efficiency, lifespan, and energy density directly influence the vehicle's performance, range, and charging speed. Research and development are focused on enhancing these aspects, with innovations like solid-state batteries holding the promise of even faster charging times, longer ranges, and safer operations. Electrical engineers are driving the design and implementation of next-generation battery technologies.

2. **Wireless Charging Infrastructure:**

Wireless charging technology is becoming a reality in the EV industry, enabling refueling without cords. Electrical engineers are designing efficient and safe charging systems that seamlessly communicate with vehicles, ensuring optimal energy transfer while maintaining user convenience.

3. **Vehicle-to-Grid (V2G) Integration:**

V2G technology enables EVs to draw energy from the grid and return excess energy back to it when needed, creating an integrated ecosystem. This bidirectional flow of energy holds immense potential for stabilizing the grid, reducing energy costs, and enhancing the overall resilience of power systems. Electrical engineers are instrumental in developing smart charging algorithms and control systems that enable seamless V2G integration.

4. **Autonomous Electric Vehicles:**

The convergence of self-driving capabilities with EVs is an exciting trend to watch. Electrical engineers play a pivotal role in developing the intricate sensor systems, control algorithms, and communication networks required for safe and efficient autonomous EV operation. These developments have the potential to reshape urban mobility, making transportation both cleaner and safer.

5. **Carbon-Neutral Manufacturing:**

The entire lifecycle of EVs, including manufacturing, matters for their environmental impact. Electrical engineers are involved in creating sustainable manufacturing processes that minimize the carbon footprint of EV production. From sourcing materials to optimizing production lines, these engineers are finding innovative ways to ensure EVs are truly environmentally friendly from inception to end-of-life.

Conclusion:

The future of electrical vehicles is a sustainable and innovative convergence of technological prowess and efficient engineering solutions. The trends in EVs underscore the pivotal role that electrical engineers play in shaping this transformative industry. As society pivots towards greener transportation solutions, the synergy between electrical engineering and EVs will continue to drive innovation, resulting in a cleaner, more sustainable, and technologically advanced future.

Sources: unknown

Spectacular Drone Show Lights Up Mahabubnagar Sky by Maniramakrishna

On the evening of 13-08-2023, the sky above Mahabubnagar was lit up by a spectacular drone show. Thousands of drones took to the air to create a dazzling display of lights and images. The show was a huge success and it left a lasting impression on everyone who saw it.

The drone show was organized by the Telangana government to celebrate the state's 73rd anniversary. The show featured images of KCR, the Chief Minister of Telangana, and Srinivas Goud, the Minister for Municipal Administration and Urban Development. 



It also featured images of Shiplaramam, Baniyan 🌳 tree, KCR, Srinivas goud, Jai Bharath Jai Telangana, Mana Mahabubnagar, light show of images of Mahabubnagar, and the Mahabubnagar Mini Tank Band Hanging Bridge.

The drone show was a truly immersive experience. The drones were able to create intricate patterns and images that were visible from miles away. The show was also accompanied by music and sound effects, which added to the overall atmosphere.

The drone show was a huge success. It attracted thousands of people from all over the state it left a lasting impression on everyone who saw it. 



If you are ever in Mahabubnagar, be sure to check out the drone show. It is a truly unique and unforgettable experience.

Images by 

Maniramakrishna Adike

Assistant Professor

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India's Power Grid Challenges

India, a rapidly developing nation, has made significant progress in various sectors. However, it is not immune to the occasional power grid failures that disrupt the lives of millions of people across the country. Over the past five years, India has faced several power grid failures, leading to widespread blackouts and highlighting the vulnerabilities within the country's power infrastructure. In this blog post, we will delve into the major reasons behind these failures and explore potential solutions to mitigate such incidents in the future.

1. Overloading and Imbalanced Load Distribution:

One of the primary causes of power grid failures in India has been overloading and imbalanced load distribution. As demand for electricity continues to rise, the existing power infrastructure often struggles to cope with the increased load. This imbalance can lead to cascading failures, resulting in blackouts across interconnected regions. Upgrading and reinforcing the power transmission and distribution systems can help address this issue.

2. Lack of Maintenance and Infrastructure Upgrades:

The inadequate maintenance and timely upgrades of power infrastructure contribute significantly to grid failures. Aging equipment, outdated technology, and insufficient investments in infrastructure development pose challenges in meeting the growing demand for electricity. Regular inspections, proactive maintenance, and strategic investments in modernizing the power grid are crucial to prevent failures and ensure a reliable power supply.

3. Natural Disasters and Extreme Weather Conditions:

India is prone to natural disasters such as cyclones, floods, and storms, which can severely impact the power grid infrastructure. Strong winds, heavy rainfall, and lightning strikes often damage transmission lines, towers, and substation equipment, leading to widespread outages. Implementing robust disaster management strategies, strengthening infrastructure resilience, and introducing advanced weather monitoring systems can aid in minimizing the impact of natural calamities.

4. Cybersecurity Threats:

With the increasing digitization and automation of power systems, the risk of cyber attacks on the power grid has become a significant concern. Malicious actors targeting critical infrastructure can disrupt the functioning of power networks, causing widespread blackouts. Strengthening cybersecurity measures, implementing stringent protocols, and conducting regular audits are essential to safeguard the power grid against cyber threats.

5. Fuel Supply Constraints:

The availability and timely supply of fuel, particularly for thermal power plants, are crucial for uninterrupted electricity generation. Fuel supply constraints, such as coal shortages or transportation issues, can disrupt power generation and strain the power grid. Diversifying the energy mix, emphasizing renewable energy sources, and improving fuel logistics can help reduce the reliance on a single source and mitigate fuel-related disruptions.

Conclusion:

The past five years have witnessed several power grid failures in India, drawing attention to the vulnerabilities within the country's power infrastructure. Addressing the challenges of overloading, imbalanced load distribution, inadequate maintenance, outdated technology, natural disasters, cybersecurity threats, and fuel supply constraints requires a comprehensive approach. Government bodies, power utilities, and stakeholders must collaborate to invest in infrastructure upgrades, promote renewable energy adoption, enhance disaster preparedness, and prioritize cybersecurity measures. By doing so, India can bolster its power grid resilience, minimize grid failures, and ensure a reliable and uninterrupted electricity supply for its citizens.

Why You Should Consider a Career in Electrical Engineering

Electrical Engineering: The Art of Making Complicated Things Simple

Electrical engineering is a broad and challenging field that encompasses the design, development, and application of electrical systems and devices. Electrical engineers are responsible for the creation of everything from power grids to smartphones, and their work has a profound impact on our daily lives.

Here are some quotes from notable figures about the importance of electrical engineering:

• "Electrical engineering is the art of making complicated things simple." - Nikola Tesla
• "The best electrical engineers are not those who know the most, but those who are most curious." - Bill Gates
• "Electrical engineering is the language of the future." - Thomas Edison
• "The future of electrical engineering is bright, because the future is all about electricity." - Elon Musk
• "Electrical engineers are the ones who make the world go round." - Unknown

These quotes highlight the importance of electrical engineering in our modern world. Electrical engineers are responsible for designing and building the systems that power our homes, businesses, and transportation networks. They are also at the forefront of developing new technologies, such as artificial intelligence, robotics, and renewable energy. As our world becomes increasingly interconnected, the demand for electrical engineers will only continue to grow.

If you are interested in a challenging and rewarding career in engineering, then electrical engineering may be the right field for you. With a strong foundation in math and science, and a passion for innovation, you can make a real difference in the world by becoming an electrical engineer.

The Challenges and Rewards of Electrical Engineering

Electrical engineering is a challenging but rewarding field. It requires a strong foundation in mathematics and physics, as well as the ability to think creatively and solve problems. Electrical engineers must be able to work independently and as part of a team, and they must be able to adapt to change.

The best part about being an electrical engineer is that you get to work on cutting-edge technologies that are changing the world. You will have the opportunity to design and build new products and systems that will improve people's lives. You will also have the opportunity to work with a variety of people from different backgrounds and cultures.

The hardest part about being an electrical engineer is that the field is constantly evolving, so you need to be constantly learning and adapting. You will need to stay up-to-date on the latest technologies and trends in order to be successful in your career.

If you are up for the challenge, then electrical engineering may be the right field for you. With a strong foundation in math and science, and a passion for innovation, you can make a real difference in the world by becoming an electrical engineer.

How to Become an Electrical Engineer

There are many different paths to becoming an electrical engineer. You can earn a bachelor's degree in electrical engineering, which typically takes four years to complete. You can also earn a master's degree or a Ph.D. in electrical engineering, which will take an additional two or three years to complete.

If you are interested in becoming an electrical engineer, there are a few things you can do to prepare:

• Take math and science classes in high school and college.
• Get involved in engineering clubs and activities.
• Shadow an electrical engineer to get a firsthand look at the profession.
• Network with electrical engineers.

With hard work and dedication, you can achieve your dream of becoming an electrical engineer.

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