Impact Factor (2025): 6.9
DOI Prefix: 10.47001/IRJIET
In this
paper, the designing of robust controllers for well-known convey crane systems
in the presence of uncertainties is presented. Cranes play a great role in the
industrial environment, construction sites, ship-yard, and rial-yard because of
their efficiency and accuracy in moving heavy and dangerous materials from one
loading location to another. The main challenge in controlling such kinds of
systems is to minimize the undesirable swings when different payloads are
carried. This phenomenon is because the convey crane is classified as an under
actuated nonlinear system and there are many sources of uncertainties that
affect the plant of the physical system Hence, the stability of the convey
crane system in the presence of the uncertainties became a challenging task
between the researchers in the control engineering field and used as a
benchmark in universities. In this research, firstly, the stability of the
linearized model of the convey-crane system is analyzed using the edge theorem
in the presence of two uncertain parameters: the rope length and the weight of
the load, where the classical pole placement technique is used for stabilization
purposes. Secondly, the sliding mode control (SMC) is proposed in order to
stabilize the nonlinear model of the convey-crane system with the presence of
noise signals. In order to test the effectiveness of the proposed SMC
controller, a conventional PID control is applied to the linearized model of
the convey-crane system, where the PID parameters are tuned using the
well-known Ziegler-Nicholas method. The robustness against the uncertainties in
the parameters of the convey crane is achieved by using the Edge theorem,
whereas the robustness against the noise signal is tested by using MATLAB; the
simulation results show the superiority of the SMC controller over the PID.
Country : Palestine
IRJIET, Volume 7, Issue 8, August 2023 pp. 88-100