FPGA IMPLEMENTATION OF ZIEGLER-NICHOLS CLOSED-LOOP METHOD FOR AUTOMATIC PID PARAMETERS TUNING
ABSTRACT: A control loop is
necessary in order to control a plant or system in order to gain low error
system, robust system, or system with fast response depend on the purpose. The
most commonly known and used control loop is
Proportional-Integral/Proportional-Integral-Derivative. In order to gain the
desired output, its parameters, which have different effects, have to be set
according to the design requirements. Several methods can be used to determine
the parameter; one of them is Ziegler-Nichols closed-loop method. The purpose
of this project is to carry out FPGA implementation of Ziegler-Nichols
closed-loop method for automatic PID parameters tuning. The commonly used
design hardware for digital projects is microcontroller. Microcontroller device
resources is limited, we do not know how much device resources this project
will take, and to add an additional resources is quite complicated as well,
therefore we choose FPGA instead. This project is part of a bigger project
which consists of three projects, which are handled by a student each. The most
important parts for this project are estimator and controller modules which are
located in the FPGA. This is because the estimator’s function is to do the
steps of the Ziegler-Nichols closed loop method and the controller is necessary
because the estimator cannot function if there is no controller. To build and
test out the system, it is necessary to begin from the subsystems. If the
subsystem’s tests are successful, then the probability for the overall system
to be success is higher. Experimental results show that the subsystems have
been successfully designed, but the overall system could not be applied because
the target Spartan 3E FPGA does not have sufficient logic resources on. The
first and second objectives was achieved but the third objective was not
achieved because this project could not be applied on the target FPGA and
therefore this project has not been used on the real tools.
Author: Nurotul Auliya, Ir.
Nanang Sulistiyanto,M.T., Dr. Mohamad Hairol Bin Jabbar
Journal Code: jptlisetrogg150002
