Self-organizing fuzzy control of constant cutting force in turning |
| |
Authors: | Ruey-Jing Lian Bai-Fu Lin Jyun-Han Huang |
| |
Affiliation: | (1) Department of Industrial Management, Vanung University, No. 1, Wanneng Rd., 320 Jhongli City, Toayuan County, Taiwan;(2) Department of Vehicle Engineering, National Taipei University of Technology, No. 1, Sec. 3, Jhongsiao E. Rd., 106 Taipei City, Taiwan |
| |
Abstract: | Constant force control is gradually becoming an important technique in the modern manufacturing process. Especially, constant
cutting force control is a useful approach in increasing the metal removal rate and the tool life for turning systems. However,
turning systems generally have nonlinear with uncertainty dynamic characteristics. Designing a model-based controller for
constant cutting force control is difficult because an accurate mathematical model in the turning system is hard to establish.
Hence, this study employed a model-free fuzzy controller to control the turning system in order to achieve constant cutting
force control. Nevertheless, the design of the traditional fuzzy controller (TFC) presents difficulties in finding control
rules and selecting an appropriate membership function. Moreover, the database and fuzzy rules of a TFC are fixed after the
design step and then cannot appropriately regulate ones real time according to the system output response and the desired
control performance. To solve the above problem, this work develops a self-organizing fuzzy controller (SOFC) for constant
cutting force control to evaluate control performance of the turning system. The SOFC continually updates the learning strategy
in the form of fuzzy rules, during the turning process. The fuzzy rule table of this SOFC can be begun with zero initial fuzzy
rules which not only overcome the difficulty in the TFC design, but also establish a suitable fuzzy rules table, and support
practically convenient fuzzy controller applications in turning systems control. To confirm the applicability of the proposed
intelligent controllers, this work retrofitted an old lathe for a turning system to evaluate the feasibility of constant cutting
force control. The SOFC has a better control performance in constant cutting force control than does the TFC, as verified
in experimental results. |
| |
Keywords: | Constant cutting force control Self-organizing fuzzy controller Turning system |
本文献已被 SpringerLink 等数据库收录! |
|