金刚石液压机位置和力控制系统设计

发布时间：2018-03-17 20:57

本文选题：金刚石　切入点：位置控制　出处：《西华大学》2017年硕士论文　论文类型：学位论文

【摘要】：人造金刚石、CBN等超硬材料需要使用金刚石压力机在高温高压条件下合成。研究金刚石压力机的液压动力系统,提升金刚石压力机性能,对超硬材料的发展有重要作用。但我国现存的大批金刚石压力机性能不高,与国外压力机对比还有较大的差距。针对这种情况,研究金刚石压力机的液压系统,提升金刚石压力机性能是超硬材料合成加工发展的一个方向。本文设计了一种基于电液比例控制的金刚石压力机升级方案,以解决现存老式压机位置和压力精度低的控制问题。首先,针对金刚石压力机工作过程,确定了压力机位置同步和压力控制升级方案,并选型主要的升级元件。然后,建立了压力机位置控制数学模型,并分析了位置模型静态和动态特性。在Simulink模块中使用跟踪式控制策略建立了位置同步模型,并使用PID控制算法对同步模型进行校正。通过Simulink模块研究了压力机位置同步性能和干扰因素对同步精度的影响。Simulink仿真结果表明:跟踪式同步控制策略满足金刚石压机同步精度要求,背压和一般负载等干扰因素对同步精度几乎无影响。其次,根据金刚石压力机压力控制升级方案,建立了压力控制数学模型。通过PID控制算法校正,利用Simulink模块仿真了压力机在超压和保压时的工作情况。研究了超压和保压的压力偏差情况,以及压力控制滞后问题。仿真结果表明:压力控制方案满足要求,相同面积比的大增压器可以提高补压速度。最后以实际压机项目为依托,验证了压力控制升级方案满足要求。同时压机升级方案扩大了液压系统使用范围,提高了客户的使用性
[Abstract]:Synthetic diamond CBN and other superhard materials need to be synthesized by diamond press under high temperature and high pressure. The hydraulic power system of diamond press is studied to improve the performance of diamond press. It plays an important role in the development of superhard materials. However, the performance of a large number of diamond presses in our country is not high, and there is still a big gap between them. In view of this situation, the hydraulic system of diamond presses is studied. Improving the performance of diamond press is a direction in the development of superhard material synthesis and processing. In this paper, an upgrade scheme of diamond press based on electro-hydraulic proportional control is designed. In order to solve the problem of low position and low pressure precision of the existing old press, firstly, according to the working process of the diamond press, the position synchronization and pressure control upgrade scheme of the press is determined, and the main upgrade components are selected. The position control mathematical model of press is established, and the static and dynamic characteristics of position model are analyzed. The position synchronization model is established by using tracking control strategy in Simulink module. The PID control algorithm is used to correct the synchronization model. The simulation results show that the tracking synchronization control strategy meets the requirements of diamond. The simulation results show that the position synchronization performance of press and the influence of interference factors on the synchronization accuracy are studied by Simulink module. The precision requirement of synchronizing press, The interference factors such as back pressure and general load have little effect on the synchronization accuracy. Secondly, according to the pressure control and upgrading scheme of diamond press, the mathematical model of pressure control is established, and corrected by PID control algorithm. The Simulink module is used to simulate the working conditions of the press when the pressure is overpressure and holding the pressure. The pressure deviation of the pressure and the pressure control lag are studied. The simulation results show that the pressure control scheme meets the requirements. The large supercharger with the same area ratio can increase the speed of filling pressure. Finally, based on the actual press project, it is verified that the pressure control and upgrade scheme meets the requirements. At the same time, the upgrade scheme of the press expands the scope of use of the hydraulic system and improves the customer's serviceability
【学位授予单位】：西华大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH137;TQ163

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