A rigorous unsteady state and spatially multidimensional model is presented and solved to describe the dynamic behavior of the primary and secondary drying stages of the lyophilization of a pharmaceutical product in vials for different operational policies. The results in this work strongly motivate
Analytical Modeling of Chatter Stability in Turning and Boring Operations: A Multi-Dimensional Approach
โ Scribed by E. Budak; E. Ozlu
- Publisher
- International Academy for Production Engineering
- Year
- 2007
- Tongue
- English
- Weight
- 526 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0007-8506
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โฆ Synopsis
In this study, an analytical model for the stability of turning and boring processes is proposed. The proposed model is a step ahead from the previous studies as it includes the dynamics of the system in a multidimensional form, uses the true process geometry and models the insert nose radius in a precise manner. Simulations are conducted in order to compare the results with the traditional oriented transfer function stability model, and to show the effects of the insert nose radius on the stability limit. It is shown that very high errors in stability, which limit predictions can be caused when the true process geometry is not considered in the calculations. The proposed stability model predictions are compared with experimental results and an acceptable agreement is observed.
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