Abstract
- In 2013, a real-time collision prevention approach based on static hulls was introduced at the 46th CIRP CMS. The present text describes the latest research results in this area. The main focus is the influence of the collision prevention system on the running manufacturing process to evaluate the practical use. Therefore, the impact was qualified by investigating the system among industrial conditions. This article describes the recognized drawbacks and suggests new approaches to compensate them. Central issue is the increased downtime of the process, caused by unnecessary or too early stop signals of the systems. One presented approach concerning this problem is the extension of the 2-hull principle to 3 hulls and the introduction of user-defined target speeds. Another object of investigation was the data provided by the CNC control which is used to get detailed information about the current state of the machine tool. It is shown how this state information can be exploited to establish a condition system making the used collision prevention approach much more flexible and smarter compared to the solution presented at the 46th CIRP CMS 2013.Another fundamental part of the overall approach is the proper modeling of the static hulls. This article extends the existing calculation method for the hull distances by considering the jerk. It is shown under which circumstances the jerk has an essential influence on the braking distance and therefore on the collision prevention method.