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ENEE 252Bachelor in Mechanical Engineering · Semester 63 Papers Available

Control System

Past examination question papers and complete curriculum syllabus for Control System (ENEE 252), Bachelor in Mechanical Engineering Semester 6 under Institute of Engineering (IOE), Tribhuvan University.

Sem 6 Subjects (4)View Full Semester Overview →
ENME 351IC EnginesENME 352Refrigeration and Air ConditioningENCE 351Engineering EconomicsENEE 252Control System
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Past Question Papers (PDF)

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Note: This question paper file (3rd sem) was archived from an IOE exam session for the common Control System curriculum.

3rd-sem_Control System.pdf

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Most Frequently Asked Questions

Top recurring IOE board exam questions for Control System with verified mark schemes, formula notation, and recurrence frequency.

Showing 35 of 35 top repeated questions
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Year-wise & Session-wise Exam Papers

Complete questions from each exam session (Regular & Back exams from 2082 to 2069) for Control System. Click any session paper to expand.

Showing 37 questions across 10 exam session papers
Institute of Engineering • 2083 Baishakh Board Examination
Q1[4 Marks]System Transfer Function and Responses
a) From the given block diagram, find the transfer ratio using block diagram reduction method. [8] b) A servomechanism as shown in block diagram below is designed to keep a radar antenna pointed at a flying aeroplane. If the aeroplane is flying with a velocity of , at a range of and the maximum tracking error is to be within , determine the required velocity error coefficient. [4] c) A system has overshoot and settling time of , for a unit step input. Determine the transfer function and Calculate peak time. Assume as .
Q2[16 Marks]Performance Specifications and Compensation Design
a) Design a suitable phase lead compensating network for to meet the following specification.
Q3[3 Marks]Stability
a) The open loop transfer function of a control system is given by Sketch the root locus for and determine the breakaway point, the angle of departure from complex poles and the stability conditions. [10] b) Write short notes on followings: (i) Characteristics of PI and PD control actions (ii) Nyquist stability criterion

Curriculum Syllabus & Course Topics

Sourced from TU curriculum portal
Full Syllabus (PDF)
Chapter-wise Units & Micro-Syllabus Topics (8 Units)

  1. 1. Control System Background

    • 1.1History of control system and its importance
    • 1.2Control system: Definition, Characteristics and basic features, Components and variables
    • 1.3Types of control system and their comparison

  2. 2. Component Modeling

    • 2.1Differential equation and transfer function, Characteristics equation, concept of pole and zero
    • 2.2Modeling of mechanical system (linear and rotational)
    • 2.3Modeling of electrical components: Inductance, capacitance, resistance, DC and AC motor, transducers and operational amplifiers, electric circuit and transfer function
    • 2.4Mechanical to electrical analogy: Force-voltage and force- current
    • 2.5Linearized approximations of non-linear characteristics

  3. 3. System Transfer Function and Responses

    • 3.1Block diagram modelling and reduction techniques
    • 3.2Signal flow graphs and mason’s gain formula
    • 3.3Time response analysis
    • 3.3.1Types of test signals: Impulse, step, ramp, parabolic
    • 3.3.2Time response analysis of first order system
    • 3.3.3Time response analysis of second order system (Step)
    • 3.3.4Time response specifications: Rise time, peak time, delay time, settling time and maximum overshoot and steady state error
    • 3.4Static error coefficients and steady state error
    • 3.5P, PI, PD, PID controller and derivative feedback controller

  4. 4. Stability

    • 4.1Introduction of stability and causes of instability
    • 4.2Characteristic equation, root location and stability
    • 4.3R-H stability criterion and application
    • 4.4Relative stability analysis from complex plane axis shifting

  5. 5. Root Locus Technique

    • 5.1Introduction of root locus
    • 5.2Relationship between root loci and time response of systems
    • 5.3Rules for manual calculation and construction of root locus
    • 5.4Stability concept from Root Locus

  6. 6. Frequency Response Techniques

    • 6.1Frequency domain characterization of the system
    • 6.2Relationship between real and complex frequency response
    • 6.3Polar Plot
    • 6.4Stability analysis in Frequency Domain: Gain Margin, Phase Margin
    • 6.5Nyquist Plot and Criterion for stability analysis
    • 6.6Bode Plot: Significance of Bode Plot, Magnitude and Phase Plot
    • 6.7Stability analysis from Bode plot

  7. 7. Performance Specifications and Compensation Design

    • 7.1Compensation technique and compensators
    • 7.2Application of root locus and frequency response on control system design
    • 7.3Lead compensator and lag compensator design from:
    • 7.3.1Root locus method
    • 7.3.2Bode plot method
    • 7.4Concept of Lead-lag compensator

  8. 8. State Space Analysis

    • 8.1Definition of state-space, state variables and state vector
    • 8.2State space representation of electrical and mechanical system
    • 8.3State space from differential equations
    • 8.4Conversion from transfer function to state space
    • 8.5Conversion from state space to a transfer function
    • 8.6State-transition matrix

Examination Scheme & Marks Distribution

Evaluation Structure

  • Final Board Theory Exam: 60 Marks (Pass mark: 24)
  • Internal Assessment: 40 Marks (Pass mark: 16)
  • Practical / Lab Exam: 25 or 50 Marks (Continuous lab evaluation + viva, where applicable)

* This is the general current IOE 60/40 scheme; verify course-specific details in the syllabus above.

Exam Preparation Guidelines

  • Review the 3 available past examination papers to identify recurring patterns, core problem types, and chapter weightage.
  • Cross-reference key answers with official syllabus units, standard textbooks, and lecture notes.
  • Structure answers with labeled diagrams, concise bullet points, and highlight final answers in numerical solutions.
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Curriculum Syllabus & Marking Scheme