SBIR Phase I: Feed Forward Hydraulic Ripple Cancellation

这个项目的更广泛的影响/商业潜力预计将在两个主要领域实现。人们已经做了大量的努力来掩盖液压噪声，但建议的努力是为了在液压脉动产生之前消除它。传统的被动掩噪方法是不够的，因为它们只能在有限的工作范围内有效地工作。这是不够的，因为液压系统通常必须在很大的速度和负载范围内运行。首先，该项目有望使液压主动悬架系统更安静、反应更灵敏、更坚固，因此更容易被工业广泛采用。因此，主动悬架系统的使用可能会增加，从而提高车辆的安全性和舒适性，从而增加社会效益。该项目还有望对液压噪声产生更广泛的影响，而液压噪声一直是液压行业数十年来的长期痛点。它将允许制造更安静、更耐用的液压泵，用于主动悬架以外的许多应用。这项小型企业创新研究（SBIR）第一阶段项目是对使用主动缓冲器消除液压泵（如转子泵）产生的流量脉动的可行性进行调查。在典型的液压系统中，转子泵是先进的电液主动悬架执行器的核心。由于其几何形状，在恒定的泵转速下，正排量泵的流体流速波动很小。这些流量的微小变化会产生压力波动，从而产生严重的机械运动，从而产生令人讨厌或不健康的噪音。所提议的努力是专门针对减轻这种泵引起的声学和结构振动噪声。这项工作将结合先进的实验和计算机模拟技术来证明该方法在典型液压系统（主动悬架执行器）中的可行性。液压系统噪声是众多液压泵应用中普遍存在的问题。液压泵的一个主要困难是它们通常需要在很大的速度和压力范围内工作。传统的噪声控制装置通常只能在这个范围的一个相对狭窄的部分进行优化。

The broader impact/commercial potential of this project is expected to be realized in two principal areas. There have been extensive efforts to mask hydraulic noise, but the proposed effort is directed at eliminating the hydraulic ripple before it is created at the source. Traditional passive methods of masking noise are insufficient because they work effectively only in a limited operating range. This is inadequate because hydraulic systems typically must operate over a wide range of speed and loads. First this project is expected to make hydraulic active suspension systems quieter, more responsive and robust and, therefore, more readily and widely adopted by industry. The resulting likely increased use of active suspension systems will, therefore, have the added societal benefit of improved vehicle safety and comfort. This project is also expected to have a much wider impact on the hydraulic noise that has been a chronic pain point for the hydraulics industry for decades. It will allow for the manufacture of quieter and more durable hydraulic pumps for many applications beyond active suspension.This Small Business Innovation Research (SBIR) Phase I project is an investigation of the feasibility of using an active buffer to eliminate flow ripple from a hydraulic pump, such as a gerotor pump. In a representative hydraulic system, the gerotor pump is at the heart of an advanced electro-hydraulic, active suspension actuator. Due to their geometry, positive displacement pumps provide small fluctuations in their fluid flow rate at a constant pump RPM. These small changes in flow rate create pressure fluctuations that can create significant mechanical movement that results in objectionable or unhealthy noise. The proposed effort is directed specifically at mitigating acoustic and structural vibration noise caused by such a pump. The proposed effort will utilize a combination of advanced experimental and computer simulation techniques to demonstrate the viability of the approach in the representative hydraulic system (an active suspension actuator). Hydraulic system noise is a widespread pain point in numerous applications involving hydraulic pumps. A key difficulty with hydraulic pumps is that they are often required to perform over a wide range of speeds and pressures. Conventional noise control devices typically can only be optimized for a relatively narrow portion of this range.