Abstract : This paper delves into the optimization design methods of hydraulic servo systems, proposing a design approach that considers the overall functional design, performance indicators, and multiple schemes for comprehensive optimization. Keywords : Hydraulics; Servo system; Optimization 1 Overview A servo system, also known as a follow-up system, is an automatic control system capable of tracking input command signals to achieve precise position, speed, or force output. Most servo systems have a detection feedback loop. By continuously detecting changes in the output of the controlled object under various disturbances, comparing it with the command value, and using the deviation between the two, the system is automatically adjusted to eliminate the deviation and ensure that the output of the controlled object always tracks the input command value. The block diagram below shows the frequency conversion control system of an oil depot's zero-dispensing filling system, which is a typical closed-loop servo system. The system operates as follows: when a large number of oil loading arms are opened, the pressure in the main oil pipeline system decreases. The pressure sensor feeds back the signal from the detection unit to the regulator. The regulator compares the feedback signal with the set standard value, and the difference is sent as an analog quantity to the frequency converter. The frequency converter then adjusts the output frequency, increasing the pump unit speed and output flow, thus raising the pressure in the oil supply main. Conversely, when fewer loading arms are open, the frequency converter adjusts the pump unit speed to decrease, reducing the output flow, ensuring the system maintains steady-state operation, thereby protecting the equipment and saving energy. [b][align=center]For more details, please click: Research on Optimization Design Methods of Hydraulic Servo Systems[/align][/b]