液压控制系统的模糊-PID算法研究

Study of Hydraulic control System Based on Fuzzy-PID Algorithm

摘要:

在LABVIEW平台上将模糊控制算法和PID控制算法相结合设计出一套应用于液压装置性能检测的测试与控制系统,该系统使用模糊-PID自适 应控制器,通过模糊规则的建立,对PID的参数进行动态的调整,提高系统的动静态特性,克服传统液压装置效率低,可靠性差,结果受人工影响等不足,本系统中液压缸采用摩擦较低的单活塞杆油缸,缸内径D＝40 mm,活塞杆直径d=20 mm,油缸最大行程为100 cm,经过反复测试,控制误差都在+0.5 mm,达到了系统设计的要求;最终结果表明:系统实时响应快、超调小、稳定可靠,可以实现对油缸位移的精确控制。

Abstract:

it designs a set of the test and control system for the hydraulic device performance testing based on fuzzy control algorithm and PID control algorithm with LABVIEW software. The system uses adaptive fuzzy PID controller, through the establishment of fuzzy rules, the PID parameters dynamically adjust the system’s dynamic and static characteristics. it overcomes some disadvantages of the conventional hydraulic devices, such as low efficiency、poor reliability、the testing results were affected by operator. The system uses single rod cylinders with a low-friction cylinder, inside diameter of the cylinder is D=40mm, piston rod diameter is d=20mm, maximum stroke of the cylinder is 100cm, after repeated testing, control errors are +0.5mm, reaching the system design requirements. The final results showed that:the system can response with time fast, the system has small overshoot, the system is stable and reliable, the system can achieve precise control of the cylinder displacement.