GOALI: Software Enabled Variable Displacment Hydraulic Pumps

软件驱动变量泵perry Y. Li和Tom chase明尼苏达大学液压系统在许多工业领域发挥着重要作用。液压系统的独特优势在于它能够在小封装中提供更高的力和更高的功率。随着行业的成熟，必须开发利用这些优势的新方法以保持竞争力。在这个项目中，提出了一种机电一体化的方法来重新设计变量泵。当前的变量泵体积较大，动态响应较低。紧凑和高性能的变量泵可以显著提高能源效率和解决新的应用。通过将紧凑型固定排量泵与高速脉宽调制（PWM）开关阀相结合，一种高度可控的紧凑型变量排量泵将能够实现许多新的软件功能。这些特性可用于提高系统效率和性能的许多方面。在这项研究中，将解决两个关键障碍。1)开发高速开/关PWM阀；2)开发PWM控制系统的建模和控制设计框架。此外，将通过实验演示各种软件启用功能。该项目将提高液压泵的功率和力密度，以及总体上使用液压系统的能源效率。通过提供紧凑的液压电源，将有可能占领新市场并激发新的应用，例如液压个人机器人，救援工具，液压动力系统等。所提出的思想可以很容易地推广到可变排量马达和可变液压变压器的设计中。在本研究中开发的高流量高速PWM开关阀也将用于许多其他液压控制应用。本文还将为有限频率PWM控制系统的建模和设计提供一个严格的理论框架。由于PWM的广泛应用，这一领域的进展将影响运动控制的许多领域，但是，仍然缺乏严格的理解。本研究结果将影响各种控制和流体动力课程的课程设置。研究生将参与跨学科研究，通过定期咨询和暑期实习与行业密切互动。本科生将通过参与实验和设计项目来参与这项研究。通过定期会议，该项目将促进当地流体动力行业与大学之间的牢固关系。此外，还将建立与当地电力电子研究小组的交流。

Software Enabled Variable Displacement PumpsPerry Y. Li and Tom ChaseUniversity of MinnesotaHydraulics that plays an important role in many industry sectors. The distinct advantage of hydraulics is its ability to deliver high forces, higher power in small packages. As the industry matures, new ways to exploit these advantages must be developed to remain competitive.In this project, a mechatronics approach is proposed to redesign variable displacement pumps. Current variable displacement pumps are relatively large and their dynamic responses are low. Compact and high performance variable displacement pumps can significantly improve energy efficiency and address new applications. By combining a compact fixed displacement pump with a high speed pulse width modulated (PWM) on/off valve, a highly controllable, compact variable displacement pump capable of achieving many new software enabled feature will be possible. These features can be used to improve many aspects of system efficiency and performance. In this research, two key obstacles will be addressed. 1) A high speed on/off PWM valve will be developed; 2) A modeling and control design framework for PWM controlled systems will be developed. In addition, various software enabled features will be demonstrated experimentally.This project will improve the power and force density of hydraulic pumps, and the energy efficiency of the use of hydraulics in general. By making available hydraulic power supplies that are compact, it will be possible to capture new markets and to inspire new applications, such as hydraulic personal robots, rescue tools, hydraulic power trains, etc. The proposed idea can be readily extended to the design of variable displacement motors, and variable hydraulic transformers. The high flow high speed PWM on/off valve that will be developed in this research will also be useful for many other hydraulic control applications. A rigorous theoretical framework will also be developed for the modeling and design of finite frequency PWM controlled systems. Advances in this area will impact many areas of motion control since PWM is widely used, but yet, rigorous understanding is still lacking. The results of this research will impact the curricula of various controls and fluid power courses. The graduate students will participate in interdisciplinary research, with close interaction with industry through regular consultation and summer internship. Undergraduate students will be involved in this research through participation in experiments and design projects. Through regular meetings, this project will foster strong relationships between the local fluid power industry and the university. In addition, exchanges with a local power electronics research group will also be established.