Abstract
To improve the controllability of an electro-hydraulic position servo control system while simultaneously enhancing the anti-jamming ability of a PID controller, a compound PID controller that combines the beetle antennae search algorithm with PID strategy was proposed, and used to drive the position servo control system of the electro-hydraulic servo system. A BAS-PID controller was designed, and the beetle antennae search algorithm was used to tune PID parameters so that the disturbance signal of the system was effectively restrained. Initially, the basic mathematical model of the electro-hydraulic position servo control system was established through theoretical analysis. The transfer function model was obtained by identifying system parameters. Then, the PID parameter-tuning problem was converted into a class of three-dimensional parameter optimization problem, and gains of PID controllers were adjusted using the beetle antennae search algorithm. Finally, by comparing the effectiveness of different algorithms, simulation and experimental results revealed that the BAS-PID controller can greatly enhance the performance of the electro-hydraulic position servo control system and inhibit external disturbances when different interference signals are used to test the system’s robustness.
Highlights
Electro-hydraulic servo systems (EHSSs) have been widely used in the industry due to their advantages of high response, fast response, good stiffness, and high force [1]
To improve the PID controllability of an electro-hydraulic position servo control system, this paper proposes a Beetle Antennae Search Algorithm (BAS)-PID controller whose parameters are tuned by BAS
The overshoot Mp reflects the stability of the system, the rise time tr reflects the response capability of the system, and the settling time td reflects the adaptability of the system
Summary
Electro-hydraulic servo systems (EHSSs) have been widely used in the industry due to their advantages of high response, fast response, good stiffness, and high force [1]. With the development of digital technology, control theory, pattern recognition technology, and electronic technology, EHSSs have become one of the most popular topics in the fields of both scientific research and industrial engineering [2,3]. Due to the complexity of such control systems, it is considered urgent to develop control technology. The PID control system is the most popular control method. Due to its easy control structure, high robustness, and high accuracy, the conventional PID control system is the most widely used in industrial processes [10,11,12]
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