DOI: 10.28979/jarnas.1283735 ISSN:

Improving Endpoint Position Control in Hydraulic Testing Machines with a Fuzzy Logic Based Approach

Serkan ANLAK, Ekrem DÜVEN
  • General Medicine
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During the repetitive operation of hydraulic test machines, some undesirable vibration movements at the piston end points, which are called the system output, and some negativities such as not fitting to the set value may occur. In order to eliminate these negativities and improve system performance, a fuzzy logic-based approach has been developed and applied on the control system in this study. A real hydraulic system design was created in the laboratory environment to test the improvements made. PID control is widely used in such systems in practical applications. However, with the use of a standard (fixed coefficient) PID control alone, problems such as endpoint vibration and/or non-adjustment to the set value caused by parameters changes cannot be completely overcome. In current applications, when such a situation is encountered, the controller coefficients need to be readjusted by an operator. In this study, it is aimed to automatically adjust these controller coefficients with a fuzzy logic-based method and thus improve the performance of the hydraulic testing machines. When the development was made on the standard PID controller used in the hydraulic testing machine, which determined the relevant coefficients with a fuzzy logic based inference, an average improvement of more than 10% was achieved in the oscillation amplitude set values.

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