This study aims to optimize the single-track process parameters (laser power P, scanning speed V, powder feed rate F) and multi-track, multi-layer pathparameters (overlap distance L, Z-axis increment Delta Z) in In62...
详细信息
This study aims to optimize the single-track process parameters (laser power P, scanning speed V, powder feed rate F) and multi-track, multi-layer pathparameters (overlap distance L, Z-axis increment Delta Z) in In625 laser cladding. The optimization objectives include clad width W, height H, melt pool area S, and dilution rate D. A Taguchi experimental design was employed, utilizing bubble plots and surface plots to visually present the influence trends of process parameters on the optimization objectives. Analysis of variance (ANOVA) and signal-to-noise ratio (S/N) analysis were conducted to assess the significance and impact of the process parameters on the optimization objectives. Using the entropy-weight TOPSIS method, the optimal parameter combination (P = 450W, V = 9 mm/s, F = 10.21 g/min) was determined based on the C value of the comprehensive evaluation index. The pathparameters were optimized using a combination of theoretical analysis and experimentation to obtain the optimal overlap distance (L = 730 mu m) and Z-axis increment (Delta Z = 180 mu m). The optimized parameters were validated through multi-track, multi-layer experiments, and the results show that the fusion cladding layer prepared with the optimized parameters has a uniform and dense organization, uniform hardness distribution, small fluctuation of friction coefficient, and stable performance of the fusion cladding layer. The optimized parameters contribute to the effective implementation of multi-track, multi-layer laser cladding processes, providing a reliable foundation for surface repair and modification in practical applications.
This article presents two interrelated problems-along tracking and cross tracking-in guidance design for curved path following for unmanned surface vehicles. Since these two types of directional tracking are interacti...
详细信息
This article presents two interrelated problems-along tracking and cross tracking-in guidance design for curved path following for unmanned surface vehicles. Since these two types of directional tracking are interactively constrained in most research work, an iteration mechanism is first put forward to optimize the pathparameter in each closed loop such that along tracking will not affect cross tracking in the subsequent time period. An extended line-of-sight (ELOS) guidance principle is then proposed by varying the look-ahead distance with the cross-track error such that sideslip in cross tracking can be promptly compensated through vehicle heading amendment. Both simulation and experimental results verify the effectiveness of the proposed methods, which perform better than the conventional line-of-sight (LOS) and integral LOS (ILOS) guidance laws.
暂无评论