  Proportional - Integral - Derivative (PID) Controller is a primary component
in industrial control systems nowadays. Its gain parameters have a powerful
effect on its transient response criteria such as integral squared error (ISE),
settling time, rise time and overshooting. Tuning gain parameters of PID to
reach the optimal transient response of control systems is a hard problem. The
standard method is Ziegler-Nichols (ZN) method that initially computes the
values of the parameters which produce reasonable response but can be enhanced.
In this paper Egyptian Vulture Optimization Algorithm (EVOA) is used to tune
the parameters of PID controller by minimizing the ISE function more than that
using ZN. The results show that using EVOA enhanced the performance of the
controller response better than ZN method when implemented to liquid level
control system. The ISE was reduced from 32 to 8.9 and the settling time from
189 to 81 second.
