Three methods of proportional pressure control on hydraulic presses were introduced and compared, which were open-loop control, closed-loop control based on PID and PID control with addition of initial signals. Results of comparison showe that the closed-loop control algorithm which is added with initial signals has many advantages such as simple control structure, easy debugging operations, stable system and high precision, and etc. The requirements of this hydraulic press on pressure control can be fully satisfied.%介绍了液压机比例压力控制的3种方法,即开环控制、基于PID的闭环控制、加入初始信号的PID控制.并对3种控制方法进行了比较.结果表明:采取的加入初始信号的闭环控制算法具有控制结构简单、调试方便、系统稳定、精度高等优点,完全满足该液压机对压力控制的要求.
展开▼
