金刚石压机压力误差补偿的PID控制研究

金刚石压机压力控制系统性能的好坏决定了金刚石的合成品质,该液压系统是一个精度要求高、易受干扰、响应滞后的复杂机电液耦合系统,很难建立一个全程精确的系统模型。提出一种加入补偿因压力损失导致顶锤位移产生的误差,并结合单神经元PID的控制方法。采用位移传感器测量压机液压缸的有效行程,反馈至单神经元PID控制系统,引入有监督的Hebb性能学习指标,通过不断学习,自动调节PID控制器权值来提高跟踪精度。仿真实验表明,该控制方法易于处理器的编程,自适应性强,对系统的改进是有效的。

Research on PID Control of Diamond Press Based on Pressure Error Compensation

The performance of pressure control system of diamond press determines the quality of diamond synthesis. Because the hydraulic system is a complex electro mechanical hydraulic coupling system with the characteristics of high precision requirement, easy to be disturbed and response lag, it is difficult to establish a precise system mode of the entire process. A control method of compensation for the top hammer displacement error caused by pressure loss and combining the single neuron PID is proposed in this paper. The effective displacement of the press hydraulic cylinder is measured by displacement sensor and fed back to the single neuron PID control system. By introduced a supervised Hebb learning performance index to learn for self-correcting of PID control weight online, the tracking accuracy is improved. The simulation results show that the method is easy to program, strong adaptability, and it can improve the system effectively.