A Trade-off Between Energy Saving and Cycle Time Reduction by Pareto Optimal Corner Smoothing in Industrial Feed Drive Systems
A Trade-off Between Energy Saving and Cycle Time Reduction by Pareto Optimal Corner Smoothing in Industrial Feed Drive Systems
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DOI：
10.1109/access.2021.3056755
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发表时间：
2021-01-01
期刊：
影响因子：
3.9
通讯作者：
Uchiyama, Naoki
中科院分区：
文献类型：
--
作者：
Nshama, Enock William;Msukwa, Mathew Renny;Uchiyama, Naoki
除了提高运动精度外，提高生产率同时减少计算机数控机床的碳足迹在制造业中也是至关重要的。一些研究已经提出了拐角平滑方法，通过利用轴向限制来获得时间最优的轨迹来改善分段线性路径的周期时间。在这些方法中，节能不被视为一个目标。本文提出了一种产生Pareto最优角平滑轨迹的方法，该轨迹权衡了最小化周期时间和能量消耗这两个矛盾的目标。线性路径轨迹和光滑拐角轨迹分别采用有限加速度法和运动学拐角光滑法描述。辨识了工业双轴进给传动系统的能耗模型，并将其用于求解双目标优化问题。从最终得到的帕累托前线中，最佳权衡轨迹被选为最小化这两个目标的轨迹。实验证明了该方法的有效性，最优折衷轨迹分别达到了65.87%和60.44%的时间和节能潜力。
Apart from improving motion accuracy, increasing productivity while reducing computer numerical control machine tools' carbon footprint is vital in the manufacturing industry. Several studies have proposed corner smoothing methods that improve cycle time for piecewise linear paths by exploiting axial limits to achieve time-optimal trajectories. Energy-saving is not considered an objective in these methods. This paper presents a method of generating Pareto optimal corner smoothing trajectories that trade-off the contradicting objectives of minimizing cycle time and energy consumption. The trajectories along linear paths and smoothed corners are respectively described using jerk limited acceleration profiles and kinematic corner smoothing methods. An energy consumption model of an industrial two-axis feed drive system is identified and used in solving the bi-objective optimization problem. From the resulting Pareto frontier, the best trade-off trajectory is selected as the one that minimizes both objectives. The proposed method's effectiveness is vindicated experimentally, where the best trade-off trajectory achieves respectively 65.87 % and 60.44 % of the time and energy-saving potentials.