GOALI: Software Enabled Variable Displacment Hydraulic Pumps

软件驱动的可变排量泵Perry Y.Li和Tom Chase来自明尼苏达水力大学，在许多工业部门发挥着重要作用。液压系统的显著优势是它能够在小包装中提供高力、高功率。随着行业的成熟，必须开发新的方法来利用这些优势以保持竞争力。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。目前的变量泵体积较大，动态响应较低。紧凑型和高性能变量泵可以显著提高能源效率并满足新的应用。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，将有可能实现高度可控、紧凑的变量泵，从而实现许多新的软件启用功能。这些功能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)开发高速开关式脉宽调制阀；2)开发脉宽调制控制系统的建模和控制设计框架。此外，还将对各种软件功能进行实验演示。该项目将提高液压泵的功率和力密度，并总体上提高液压使用的能效。通过制造紧凑的液压电源，将有可能占领新的市场并激发新的应用，如液压个人机器人、救援工具、液压动力总成等。建议的想法可以很容易地扩展到变量马达和变量液压变压器的设计。本研究所开发的大流量高速脉宽调制开关阀也可用于其它液压控制领域。还将为有限频率PWM控制系统的建模和设计开发一个严格的理论框架。由于PWM的广泛应用，这一领域的进展将对运动控制的许多领域产生影响，但仍缺乏严格的理解。这项研究的结果将对各种控制和流体动力课程的课程产生影响。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，还将与当地的电力电子研究小组建立交流。

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.