Breakaway Force Reduction in Pneumatic Cylinders utilizing Ultrasound

在需要平稳和准确启动的各种应用中，使用气动缸作为致动器是理想的。尽管这种方法不能充分实现，因为活塞和密封件之间的高粘附力导致高分离力。探索不同的可能解决方案尚未导致最佳的操作行为。相反，考虑到上述问题，这些方法引入了负面副作用，仅实现有限的改善。然而，一种替代和创新的技术，以减少分离力，可以发现在叠加的过程与高频超声波振动。这一实施概念的潜力已经在动力学和振动研究所进行了几次预测试。因此，通过叠加超声波振动来减少脱离力的描述和验证将在所提交的研究项目的框架内进行。自己的专业知识和预测试以及其他学者的研究工作为这一意图提供了基础。因此，开发技术实用性的基本证明是项目的主要目标。因此，将进行实验研究以及基于模型的接触力学描述，考虑材料特性，密封特性和超声振动属性。通过使用获得的结果和专业知识，将执行用于设计具有塑料-金属接触的减摩系统的标准程序。开发一个功能齐全的超声波辅助气动缸的设计准则的验证将结束研究项目。

Using pneumatic cylinders as actuators is desirable in a variety of applications requiring smooth and accurate start-ups. Though this approach can not be sufficiently realized since high adhesive forces between piston and seal cause high breakaway forces. Exploring different possible solutions has not yet led to an optimal operational behavior. On the contrary, these approaches introduce negative side-effects achieving only limited improvement considering the problem stated above. However, an alternative and innovative technology to reduce the breakaway forces can be found in superimposing the process with high-frequency ultrasonic vibrations. The promising potential of this implementation concept has already been examined at the Institute of Dynamics and Vibration Research by executing several pre-tests. Depiction and validation of the breakaway force reduction by superimposing ultrasonic vibrations thus are to be carried out within the framework of the submitted research project. Own expertise and the pre-tests as well as research work of other academics provide the basis for this intention. Therefore, developing a fundamental proof of technical usefulness is the main project objective. Thus experimental studies as well as model-based description of contact mechanics in consideration of material properties, seal characteristics and ultrasonic vibration attributes will be carried out. Compiling standard procedures for designing friction reduction systems with a plastic-metal-contact will be executed by usage of the gained results and expertise. Development of a fully functional ultrasonic assisted pneumatic cylinder for validation of the design guideline will conclude the research project.