Modeling, Optimization and Control of Advanced Switched Inertance Hydraulic Converters

先进开关惯性液压转换器的建模、优化和控制

• 批准号: RGPIN-2017-05906
• 负责人: Wiens, Travis
• 金额: $ 1.53万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=668542
• 关键词: Modeling; Optimization; Control; Advanced; Switched

Every hydraulic circuit wastes energy. A recent study estimated the average energy efficiency of hydraulic equipment in the US at 21%, wasting energy on the order of 10 billion liters of diesel fuel yearly. Canada can expect to have a similar overall efficiency and proportionate waste of energy. Much of the energy wasted in hydraulic circuits is lost when high pressure flows are throttled by control valves in order to control flow or pressure. A technology that has potential to make a revolutionary change in the efficiency of these circuits is the Switched Inertance Hydraulic Converter (SIHC). Unlike throttling valves, which lose energy when reducing flow or pressure, SIHCs convert a high-pressure, low-flow input into a controlled low-pressure, high-flow output (or vice versa), converting pressure energy into flow energy at high efficiency rather than losing it. If applied across the industry, SIHCs can be expected to make a significant impact in the worldwide consumption of fossil fuel. This grant application is concerned with modeling and optimization of these devices, particularly to do with the complex wave propagation effects that limit their practical implementation.***Switched inertance converters are the hydraulic equivalent to the now-ubiquitous electrical DC-DC switching converters which revolutionized the efficiency of everything from phone chargers to high power battery chargers. SIHCs use the inertia of a fluid flowing through a tube (the “inertance tube”) to efficiently regulate flow or pressure. While the high theoretical efficiency of these converters is attractive, their widespread adoption has been hampered by a number of practical concerns. These include lower than optimal energy efficiency and unacceptably high acoustic noise emissions. The research proposed in this Discovery Grant application will address some of the basic science behind each of these issues.***We will develop and validate new dynamic models for the flow inside the inertance tube, taking into account effects such as cavitation at low pressure, as well as the effect of tapering the tube along its length. Preliminary studies have indicated that significant performance improvements can be achieved by carefully positioning the valves along the length of the inertance tube as well as shaping the tube to create internal reflections. We will use the models developed above to exploit these effects, with the goal of increasing efficiency and reducing noise emission, with the overarching goal of hastening the commercial acceptance of these devices.***I expect that this funding will position our lab at the forefront of this emerging technology, both generating new knowledge and training the next generation of engineers in this exciting field.**

每个液压回路都浪费能源。最近的一项研究估计，美国液压设备的平均能效为21%，每年浪费的能源约为100亿升柴油。加拿大可以期望有类似的整体效率和相应的能源浪费。当为了控制流量或压力而通过控制阀对高压流量进行节流时，在液压回路中浪费的大部分能量都被浪费了。一项有潜力在这些电路的效率方面做出革命性改变的技术是开关惯性液压转换器（SIHC）。与节流阀不同，节流阀在减少流量或压力时损失能量，sihc将高压、低流量的输入转换为可控的低压、高流量的输出（反之亦然），将压力能高效地转换为流量能，而不是损失。如果在整个行业中应用，预计sihc将对全球化石燃料消费产生重大影响。这项拨款申请涉及这些设备的建模和优化，特别是与限制其实际实施的复杂波传播效应有关。开关惰性转换器是液压等效的现在无处不在的电气DC-DC开关转换器，它彻底改变了一切的效率，从手机充电器到高功率电池充电器。sihc利用流体流过管（“惯性管”）的惯性来有效地调节流量或压力。虽然这些转换器的高理论效率很有吸引力，但它们的广泛采用受到一些实际问题的阻碍。这些包括低于最佳能源效率和不可接受的高噪音排放。本发现基金申请中提出的研究将解决这些问题背后的一些基础科学。***我们将开发并验证新的惯性管内部流动的动态模型，考虑到低压空化等影响，以及沿其长度变细的管的影响。初步研究表明，通过沿着惯性管的长度仔细定位阀门，并对管进行整形以产生内部反射，可以显著提高性能。我们将使用上面开发的模型来开发这些效果，以提高效率和减少噪音排放为目标，以加速这些设备的商业接受为总体目标。我希望这笔资金将使我们的实验室处于这一新兴技术的前沿，既能产生新知识，又能在这一令人兴奋的领域培养下一代工程师