A thesis defense was held at Al-Khwarizmi College, Baghdad University, for the student Alaa Jasim Abd, a candidate for a master’s degree in the Mechatronic Engineering Department, on Monday morning, June 30th, 2025. The student achieved a pass with merit.
The thesis focused on enhancing hydraulic system performance by replacing the proportional valve with a digital valve unit. Two systems were experimentally implemented—conventional and digital—and simulated using PLC. A FLUIDSIM-Hydraulic program was used as a tool to simulate and control the system.
The DVU, composed of parallel on/off solenoid valves, is controlled by geometric-sequence-based logic. This approach demonstrated accurate control and improved lining properties, along with flexible operation at low flow rates. The results show that the digital system outperforms the conventional one in terms of accuracy and reliability, making it a promising choice for modern hydraulic control applications.
The study demonstrated that digital hydraulic systems offer practical and cost-effective solutions due to their simple design, low operational costs, and high performance in regulating response and speed. Furthermore, the results showed the system’s ability to meet the requirements of modern industrial applications, as it relies on intelligent control and accurate simulation.
