SBIR Phase I: Materials for Structural Vibration Avoidance

* 9761032海恩斯 这个小企业创新研究第一阶段项目将详细介绍一种制造结构坚固材料的方法，其中材料的刚度可以通过电气方式改变。 如果这种创新的新型材料用于建造结构，那么改变材料的刚度就会改变结构的振动特性。 通过不断改变关键结构部件的刚度，振动将永远无法在任何共振频率下建立，因为共振频率将不断变化。 当前的主动阻尼系统使用致动器和先进的控制理论来主动干扰振动。 这些系统的一个基本问题是，它们会给系统增加能量，并且会变得不稳定。 它们基于对噪声特性的某种程度的预测和/或被控制的结构的模型，并且当预测或模型不能正确地表示当前情况时，可以增加而不是减少振动。 在这种方法中，基本的优点是能量不能被添加到系统中，因此它不会变得不稳定。 此外，还有不需要致动器并且需要比传统系统少得多的功率的实际优点。 使振动最小化的技术将在飞机、汽车、空间结构和高精度制造设备（例如机床或光刻机）中具有商业价值。 已经确定了一位投资者，他有兴趣资助这项技术的应用，如果研究成功，将其应用于扫描探针显微镜，其中振动排除了在工厂车间使用这些压力计分辨率仪器进行过程控制。 ***

*** 9761032 Haynes This Small Business Innovation Research Phase I project will detail a method to fabricate structurally strong materials where the stiffness of the material can be varied electrically. If this innovative new type of material is used to build structures, then changing the stiffness of the material changes the vibrational characteristics of the structures. By continually changing the stiffness of key structural components, vibrations will never be able to build up at any resonance frequency because the resonance frequencies will continually change. Current active damping systems use actuators and advanced control theory to actively interfere with vibrations. A fundamental problem with these systems is that they can add energy to the system, and can go unstable. They are based on some level of prediction of the noise characteristics and/or a model of the structure being controlled, and can increase instead of decrease vibrations when the predictions or models do not correctly represent the current situation. In this approach, the fundamental advantage is that energy cannot be added to the system, and thus it cannot go unstable. In addition there are practical advantages of requiring no actuators and requiring far less power than conventional systems. A technology to minimize vibrations would have commercial value in aircraft, cars, space structures, and high precision manufacturing equipment such as machine tools or lithography machines. An investor has been identified who is interested in funding an application of this technology, if the research is successful, to scanning probe microscopes where vibration precludes using these manometer resolution instruments on the factory floor for in-process control. ***