1. STUDY OF A PRACTICAL POSITION CONTROL SYSTEM. Obtaining closed step responses
for gain setting corresponding to over-damped and under-damped responses. Determination of rise
time and peak time using individualized components in SIMULINK. Determination of un-damped
natural frequency and damping ratio from the experimental data.
2. TUNING OF P, PI, AND PID CONTROLLER FOR FIRST ORDER PLANT WITH DEAD
TIME USING Z-N METHOD. Process parameters (time constant and delay/lag) will be provided,
the students would compute controller gains by using Z-N method. Steady state and transient
performance of the closed loop plant with and without steady disturbances will have to be noted.
Theoretical phase and gain margins will have to be manually computed for each gain settings.
3. DESIGN OF LEAD AND LAG COMPENSATION USING CACSAD TOOLS (Plant transfer
function will be provided. Step response is to be obtained. (PSPICE, MATLAB, SciLab may be
used).
4. STATE VARIABLE ANALYSIS USING CACSAD COMMAND TOOL. Familiarization and
use of CACSAD command for state variable analysis. Obtaining transfer function from SV model
and vice versa. Obtaining step response for a SISO system given in SV form. (PSPICE,
MATLAB, SciLab may be used).
5. STATE VARIABLE ANALYSIS USING CACSAD BLOCK DIAGRAM TOOL. Familiarization
and use of CACSAD BLOCK DIAGRAM TOOL for state variable analysis. Obtaining step
response and initial condition response for a single input, two output system given in SV form.
(PSPICE, MATLAB, SciLab may be used).
6. PERFORMANCE ANALYSIS OF A DISCRETE TIME SYSTEM USING CACSAD TOOL.
Familiarization and use of CACSAD block diagram tool for Digital Control System. Study of
closed response of a continuous system with a digital controller with sample and hold. (PSPICE,
MATLAB, SciLab may be used).
7. STUDYING THE EFFECTS OF NONLINEARITY IN A FEEDBACK CONTROLLED
SYSTEM USING TIME RESPONSE. Determination of step response with a limiter nonlinearity
introduced into the forward path of 2nd order unity feedback control systems. The open loop plant
will have one pole at the origin and the other pole will be in LHP or RHP. To verify that (i) with
open loop stable pole, the response is slowed down for larger amplitude input and (ii) for unstable
plant , the closed loop system may become oscillatory with large input amplitude. (PSPICE,
MATLAB, SciLab may be used).
8. STUDYING THE EFFECTS OF NONLINEARITY IN A FEEDBACK CONTROLLED
SYSTEM USING PHASE PLANE PLOTS. Determination of phase plane trajectory and
possibility of limit cycle of common nonlinearities. CACSAD block diagram tool will be used.
(PSPICE, MATLAB, SciLab may be used).