JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Control Systems

Course Objectives:

• To know the time and frequency domain design problem specifications.
• To understand the design of classical control systems in time-domain
• To analyze the design aspects of classical control systems in frequency-domain
• To know the design of various compensator controllers
• To identify the performance of the systems by design them in state-space
• To study the effects of nonlinearities on various systems performance

Course Outcomes

At the end of this course, students will demonstrate the ability to

• Understand various design specifications.
• Design controllers to satisfy the desired design specifications using simple controller structures (P, PI, PID, compensators).
• Design controllers using the state-space approach.

UNIT - I

Design Specifications: Introduction to design problem and philosophy. Introduction to time domain and frequency domain design specification and its physical relevance. Effect of gain on transient and steady state response. Effect of addition of pole on system performance. Effect of addition of zero on system response.

UNIT - II

Design of Classical Control System In The Time Domain: Introduction to compensator. Design of Lag, lead lag-lead compensator in time domain. Feedback and Feed forward compensator design. Feedback compensation. Realization of compensators.

UNIT - III

Design of Classical Control System In Frequency Domain: Compensator design in frequency domain to improve steady state and transient response. Feedback and Feed forward compensator design using bode diagram.

UNIT - IV

Design of PID Controllers: Design of P, PI, PD and PID controllers in time domain and frequency domain for first, second and third order systems. Control loop with auxiliary feedback – Feed forward control.

UNIT - V

Control System Design in State Space: Review of state space representation. Concept of controllability & observability, effect of pole zero cancellation on the controllability & observability of the system, pole placement design through state feedback. Ackerman’s Formula for feedback gain design. Design of Observer. Reduced order observer. Separation Principle. Non-linearities and Its Effect on System Performance: Various types of non-linearities. Effect of various non-linearities on system performance. Singular points. Phase plot analysis.

TEXT BOOKS:

• 1. N. Nise, “Control system Engineering”, John Wiley, 2000.
• 2. I. J. Nagrath and M. Gopal, “Control system engineering”, Wiley, 2000.

REFERENCE BOOKS:

• 1. M. Gopal, “Digital Control Engineering”, Wiley Eastern, 1988.
• 2. K. Ogata, “Modern Control Engineering”, Prentice Hall, 2010.
• 3. B. C. Kuo, “Automatic Control system”, Prentice Hall, 1995.
• 4. J. J. D’Azzo and C. H. Houpis, “Linear control system analysis and design (conventional and modern)”, McGraw Hill, 1995.
• 5. R. T. Stefani and G. H. Hostetter, “Design of feedback Control Systems”, Saunders College Pub, 1994.