智能电液执行机构控制器的设计

发布时间：2018-10-31 13:41

【摘要】：随着液压传动及其控制技术的发展，，电液执行机构广泛应用于石油、化工、电力、冶金等现代工业控制系统中，电液执行机构以有压液体作为动力源，通过对阀门开度大小的调节，进而调节系统的压力、温度、流量等参数。基于微处理器技术的迅猛发展和自动化仪表技术的崛起，为了适应高质量、高速度的工业控制需求，开发研制新型智能电液执行机构成为广大科技工作者的追求目标。文章首先对电液执行机构整机构成、特点及性能指标等作了分析，执行机构整体由控制器和执行器两部分组成，其中执行机构控制器是实现智能化电液执行机构的核心技术。文章针对于执行机构控制单元进行开发设计。采用ATmega16L单片机作为核心控制器，智能控制器根据工业现场实际要求，通过对阀门开度控制信号和位置反馈信号进行采集、转换、计算和比较，发出控制信号决定并执行换向阀的换向、交流伺服电动机的起停运转，推动液压缸推杆的伸缩，进而对阀门转角大小、开度百分比进行精确定位。阀门位置反馈信号的检测采用直线位移传感器，电机电流、电压信号检测装置采用霍尔型电流互感器，采用闭环控制方式，并增设液晶显示、RS-485串行口数字通讯模块，实现了远程或本地人机对话，同时采取多种断信号保护和抗干扰措施，使整个系统具有良好的功能扩展性和稳定性，较一般的执行机构而言，更符合智能化、数字化、人工化的标准。为了验证理论设计的合理性，进行了大量实验室调试和工业现场调试，实验结果表明，本智能电液执行机构控制器符合工业现场要求、控制精度达到预期目标，最终将新型电液执行机构投入工业生产，理论应用于工程实践。
[Abstract]:With the development of hydraulic transmission and its control technology, electro-hydraulic actuators are widely used in modern industrial control systems such as petroleum, chemical industry, electric power, metallurgy and so on. The pressure, temperature and flow rate of the system are adjusted by adjusting the opening of the valve. Based on the rapid development of microprocessor technology and the rise of automatic instrument technology, in order to meet the needs of high quality and high speed industrial control, it has become the pursuit goal of the majority of scientific and technological workers to develop a new type of intelligent electro-hydraulic actuator. In this paper, the structure, characteristics and performance index of the electrohydraulic actuator are analyzed. The actuator is composed of two parts: the controller and the actuator, among which the actuator controller is the core technology to realize the intelligent electro-hydraulic actuator. In this paper, the control unit of the actuator is designed and developed. The ATmega16L microcontroller is used as the core controller. According to the actual requirements of the industrial field, the intelligent controller collects, converts, calculates and compares the valve opening control signal and the position feedback signal. The control signal is issued to determine and execute the reversing of the reversing valve, the starting and stopping operation of the AC servo motor, the expansion of the push rod of the hydraulic cylinder is promoted, and the precise positioning of the valve rotation angle and opening percentage is carried out. The valve position feedback signal is detected by linear displacement sensor, electric current and voltage signal detection device adopts Hall current transformer, adopts closed loop control mode, and adds liquid crystal display and RS-485 serial port digital communication module. The remote or local man-machine dialogue is realized. At the same time, a variety of signal protection and anti-jamming measures are taken to make the whole system have good function expansibility and stability. Artificial standards. In order to verify the rationality of the theoretical design, a large number of laboratory and industrial field debugging have been carried out. The experimental results show that the intelligent electro-hydraulic actuator controller meets the requirements of the industrial field, and the control precision reaches the expected goal. Finally, the new electrohydraulic actuator is put into industrial production, and the theory is applied to engineering practice.
【学位授予单位】：西安工程大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TP273.5;TH137

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