高温高压流变仪围压控制系统设计

发布时间：2018-02-01 19:40

本文关键词： 流变仪围压基本比例输出 PID 仿真测试　出处：《机械设计与制造》2017年11期 　论文类型：期刊论文

【摘要】：针对在高温高压流变仪围压控制中传统PID算法存在改变目标速率时会产生超调的缺点,提出一种基于基本比例输出的PID控制算法控制加压和减压过程,并通过理论分析了算法的可行性。依据高温高压流变仪围压系统的特性,在实际实验的基础上建立了系统加压和减压的数学模型,用Simulink工具箱对加压和减压过程进行了仿真,并在高温高压流变仪上对控制算法进行了测试,仿真和测试结果表明基于基本比例输出型PID控制算法跟踪效果好,响应速度快,满足控制要求。
[Abstract]:In view of the disadvantage that the traditional PID algorithm can overshoot when changing the target rate in the high temperature and high pressure rheometer confining pressure control, a PID control algorithm based on basic proportional output is proposed to control the pressurization and decompression process. The feasibility of the algorithm is analyzed theoretically. According to the characteristics of the high-temperature and high-pressure rheometer confining pressure system, the mathematical model of pressure and decompression system is established on the basis of practical experiments. The process of pressurization and decompression is simulated with Simulink toolbox, and the control algorithm is tested on the high temperature and high pressure rheometer. The simulation and test results show that the PID control algorithm based on basic proportional output has good tracking effect, fast response speed and meets the control requirements.
【作者单位】：中国地质大学机械与电子信息学院;湖北九洲数控机床有限责任公司;
【基金】：国家自然科学基金委员会资助项目(41227001) 国家科技支撑计划课题(2015BAF32B03)
【分类号】：TH76;TP273
【正文快照】： 1引言当前人类还无法对地球深部物质进行直接取样和检测,高温高压流变仪则是当前用来模拟地幔的高温高压环境,进行地球深部岩石力学研究的有效工具[1]。流变实验用时长,为保证实验工作效率,缩短仪器围压系统的加压和减压时间是主要措施,但当围压处于超高压状态时,加压和减压速

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