Deep hole drilling methods are used for producing holes with a high length-to-diameter ratio, good surface finish and straightness. The process is subject to dynamic disturbances usually classified as either chatter vibration or spiralling. In this paper, we will focus on the application and use of multivariate control charts to monitor the process in order to detect chatter vibrations. The res...

In todays manufacturing industry, high-speed milling plays an important role. The main benefits of high-speed milling over conventional milling are the high material removal rates with relatively low cutting forces. The efficiency of high-speed milling is limited by the occurrence of regenerative chatter. Chatter is an undesired instability phenomenon, causing excessive tool vibrations, reduced...

Businesses deploy chatter bots to engage in text based conversations with customers that are intended resolve their issues. However, these chatter bots are only effective in exchanges consisting of question answer pairs, where the context may switch with every pair. I am designing a semantic architecture that enables chatter bots to hold short conversations, where context is maintained througho...

Chatter bots are software programs that engage in artificial conversations through a text-based input medium. They are extensively deployed in customer service applications. Existing approaches to artificial conversation generation emphasize grammatical and linguistic modeling techniques. They focus on generation of discrete sentence-level utterances. These approaches perform poorly in conversa...

Chatter suppression is essential for achieving high precision and surface quality in machining processes. In this paper, a control strategy is presented for chatter suppression in cutting process in the presence of tool wear and parameter uncertainties. A single-degree-of-freedom model of a turning process in the orthogonal cutting configuration is used to set up the nonlinear delay differentia...

. This paper outlines a strategy for the active control of the self-excited vibration of machine tools which arises when metal is turned, ground or milled. The requisite sensor and actuators for successful operation of such a scheme are outlined. Examples of the results of typical sensors are illustrated in a brief review of previous work. A simple single degree of freedom model of chatter is s...

ABSTRACT The machining of slim pieces is affected by the chatter phenomenon. In this paper a study of the factors that influence the surface roughness of slim pieces fabricated on a lathe under self-excitation chatter vibration is presented. The purpose of the study is to determine which are the variables more influents in the process. For this study a novel analytical model for predicting the ...

Deep hole drilling methods are used for producing holes with a high length-to-diameter ratio, good surface finish and straightness. The process is subject to dynamic disturbances that is classified as either chatter vibration or spiralling. In this work, nonlinear time series modeling is used to setup an on-line modeling approach of the time varying dynamics of the process. An on-line monitorin...