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Advanced Control System (ACS) important questionsMost repeated in SPPU papers

These 24 questions appeared in more than one SPPU Advanced Control System paper we have: 11 papers, from Oct 2022 to Nov 2025. The most-asked come first. Each one links to the papers it was asked in.

All ACS papers and notes

Repeated questions

Endsem questions (23)

  1. 4×asked

    Define and explain sliding mode control.

    Nov 2025 ·May 2024 ·Nov 2023 ·May 2023

  2. 4×asked

    Discuss the effect of pole zero cancellation on the controllability and the observability of the system.

    Nov 2025 ·May 2024 ·Nov 2023 ·May 2023

  3. 4×asked

    Explain the concept of sliding mode control and Draw block diagram of Model Reference Adaptive Control scheme and explain it. 

    Nov 2024 ·May 2024 ·May 2023 ·Nov 2022

  4. 3×asked

    Define the State transition matrix. Write its properties.

    Nov 2025 ·May 2024 ·Nov 2022

  5. 3×asked

    State and explain the linear quadratic regulator. problem.

    Nov 2025 ·Nov 2023 ·Nov 2022

  6. 3×asked

    Define state, state variable, state vector, state equation, and output equation. Draw a state diagram. 2

    May 2025 ·May 2024 ·Nov 2022

  7. 3×asked

    Define sampling & reconstruction process and Explain the Shannon’s Sampling theorem.

    Nov 2024 ·May 2024 ·May 2023

  8. 3×asked

    Explain in detail basic building blocks of discrete time control system and State advantages of digital control system.

    Nov 2024 ·May 2024 ·May 2023

  9. 3×asked

    Explain in details the terms, variable structure control, sliding phase, reaching phase and chattering with suitable diagram.

    Nov 2024 ·May 2024 ·May 2023

  10. 3×asked

    What is reaching law? Why is it required? Derive expressions of control for constant rate reaching law, constant plus proportional rate reaching law and power rate reaching law.

    May 2024 ·Nov 2023 ·Nov 2022

  11. 2×asked

    Explain Gain scheduling adaptive control strategy with proper block diagram.

    Nov 2025 ·May 2023

  12. 2×asked

    Explain the adaptive control and its various schemes.

    Nov 2025 ·May 2025

  13. 2×asked

    Define the optimal control problem and write down the steps to solve problem using linear quadratic regulator. 

    May 2025 ·Nov 2022

  14. 2×asked

    Explain the concept of Zero Order Hold and First Order Hold operations. Derive the transfer function of ZOH.

    May 2025 ·Nov 2022

  15. 2×asked

    State and explain Shannon ’ s Sampling theorem. How to select the sampling period?

    May 2025 ·Nov 2022

  16. 2×asked

    What is observability ’ ? How to investigate the observability of a system using Gilbert ’ s test for. i) Distinct eigenvalues and ii) Repeated eigenvalues

    May 2025 ·Nov 2022

  17. 2×asked

    Show how mapping of left half of S-plane is done into the Z plane with stable and unstable Region with proper diagrams.

    Nov 2024 ·May 2023

  18. 2×asked

    Derive and explain Ackermann ’ s formula for pole placement design.

    May 2024 ·May 2023

  19. 2×asked

    Describe a self-tuning regulator with suitable block-diagram.

    Nov 2023 ·May 2023

  20. 2×asked

    Explain basic block diagram of the digital control system.

    Nov 2023 ·Nov 2022

  21. 2×asked

    Explain concept of effect of pole zero cancellation.

    Nov 2023 ·Nov 2022

  22. 2×asked

    Explain full order Observer with proper block diagram.

    Nov 2023 ·Nov 2022

  23. 2×asked

    Define adaptive control. Explain the need of adaptive control. What is adaption mechanism?

    May 2023 ·Nov 2022

Insem questions (1)

  1. 2×asked

    Draw the circuit diagram of lag compensator and derive its transfer function.

    Aug 2025 ·Sep 2024

Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.