火箭舵机转速排量复合调节电动静液作动器设计与研究

发布时间：2018-05-17 21:03

本文选题：电动静液作动器 + 转速排量复合调节　；参考：《哈尔滨工业大学》2014年硕士论文

【摘要】：电动静液伺服技术是伺服电机与容积式液压技术相结合的产物，是近二十多年来发展起来一项机电液一体化新技术，它既具有液压系统的功率密度大、润滑性好等特性，又具有电拖动系统接线方便、控制灵活等优点，所以受到世界各国液压学术界和产业界的高度重视，已经成为21世纪液压节能技术研究的重要方向。适逢航空飞行器功率电传技术（PBW）的发展趋势，用于飞机舵面控制装置的电动静液作动器成为该技术的一大研究热点。美国的几种最新型的战斗机已经配备了电动静液作动器，但现有的电动静液作动器基本都采用定量泵，已有学者指出，若采用变量泵构成转速排量复合调节，系统的动态特性和效率都有望进一步提高。本课题就是在火箭舵机这一全新的应用领域探究转速排量复合调节电动静液作动器的设计方法及性能。本文首先基于设计指标对火箭舵机进行运动学和动力学分析，基于分析结果和所给技术参数完成元件选型和作动器结构设计，并对所设计作动器进行了模态有限元分析；再从元件到分系统到整体建立了系统的数学模型，，为进一步进行系统的控制算法设计和模态分析奠定了基础。本系统有两个控制元件——变量泵与伺服电机，且它们的输出量——排量与转速——是相乘的关系，这样，系统实际上是本质非线性的系统，如果利用非线性控制理论进行反馈线性化，再进行极点配置或最优控制，系统的参数鲁棒性会较差，经过分析系统工况，将液压变量泵与伺服电机用不同的反馈量进行控制，且利用模糊控制器指定不同的控制目标，实现了系统的解耦控制，仿真与实验结果表明转速排量复合调节比单独调节一个变量的系统动态性能更为优良，一般工况下的能量效率也进一步提高，且由于电动静液系统本身便于集成，作动器模态指标也满足要求，从而证明了转速排量复合调节的优异性，也表明了本文设计方法的合理性和有效性。
[Abstract]:The electric static hydraulic servo technology is the product of the combination of the servo motor and the volumetric hydraulic technology. It is a new technology of mechanical and electrical integration developed in the last more than 20 years. It not only has the characteristics of high power density and good lubricity of the hydraulic system, but also has the advantages of electric drag system connection and flexible control, so it is subject to all the countries in the world. Hydraulic academia and industry attach great importance to it. It has become an important direction of hydraulic energy saving technology research in twenty-first Century.
As the development trend of power transmission technology (PBW) of aircraft, electric Hydrostatic Actuator Used in aircraft rudder control device has become a hot topic in this technology. Some of the latest types of fighter aircraft in the United States have been equipped with electric hydrostatic actuators, but the existing electrostatic and hydrostatic actuators are basically using quantitative pumps, some scholars have pointed out The dynamic characteristics and efficiency of the system are expected to be further improved if the variable pump is used to form a rotational speed displacement compound adjustment. This topic is to explore the design method and performance of an electric static hydraulic actuator with a rotational speed displacement compound adjustment in the new application field of rocket rudder.
In this paper, based on the design index, the kinematic and dynamic analysis of the rocket rudder is carried out. Based on the analysis results and the technical parameters, the component selection and the actuator structure are designed, and the modal finite element analysis is carried out for the designed actuator. The design of the control algorithm and modal analysis of the system lay the foundation.
The system has two control elements - variable pump and servo motor, and their output - displacement and speed - is the relationship of multiplication. In this way, the system is essentially nonlinear system. If the nonlinear control theory is used for feedback linearization and then pole placement or optimal control, the parameter robustness of the system will be After analyzing the operating conditions of the system, the hydraulic variable pump and the servo motor are controlled with different feedback quantities, and the fuzzy controller is used to specify different control targets. The decoupling control of the system is realized. The simulation and experimental results show that the dynamic performance of the speed displacement compound adjustment is better than that of a single variable. The energy efficiency under the like condition is further improved, and as the electric static fluid system itself is easy to integrate, the actuator modal index also meets the requirements, which proves the excellence of the speed displacement compound adjustment, and shows the rationality and effectiveness of the design method of this paper.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH137

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