BM2301 BIOCONTROL SYSTEMS Lecture Notes for BME - Fifth (5th) semester
BM2301 Lecture Notes
Terminology and basic structure of control system, example of a closed loop system,
transfer functions, modeling of electrical systems, translational and rotational mechanical
systems, electromechanical systems, block diagram and signal flow graph representation
of systems, conversion of block diagram to signal flow graph, reduction of block diagram
and signal flow graph.
UNIT II RESPONSE ANALYSIS
Step and Impulse responses of first order and second order systems, determination of
time domain specifications of first and second order systems from its output responses.
definition of steady state error constants and its computation, definition of stability, Routh-
Hurwitz criteria of stability, root locus technique, construction of root locus and study of
stability, definition of dominant poles and relative stability .
UNIT III FREQUENCY RESPONSE ANALYSIS
Frequency response, Nyquist stability criterion, Nyquist plot and determination of closed
loop stability, definition of gain margin and phase margin, Bode plot, determination of gain
margin and phase margin using Bode plot, use of Nichol’s chart to compute resonance
frequency and band width.
UNIT IV PHYSIOLOGICAL CONTROL SYSTEMS
Block diagram representation of the muscle stretch reflex, difference between engineering
and physiological control systems, generalized system properties , models with
combination of system elements, introduction to simulation.
UNIT V PHYSIOLOGICAL SYSTEM MODELING
Linear model of respiratory mechanics, model of chemical regulation of ventilation, linear
model of muscle mechanics, model of regulation of cardiac output, model of
Neuromuscular reflex motion.