Optimal vibration control and co-design of very flexible actuated structures
Optimal vibration control and co-design of very flexible actuated structures
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DOI：
10.1016/j.jsv.2016.05.018
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发表时间：
2016-09
影响因子：
4.7
通讯作者：
S. Maraniello;R. Palacios
中科院分区：
文献类型：
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作者：
S. Maraniello;R. Palacios
将单点打靶法应用于超柔梁的最优控制和结构与控制的联合设计(协同设计)。其目的是评估一体化设计方法的可行性、优点和局限性，以处理表现出大振动和更普遍的强非线性耦合的执行结构。针对最优控制问题和协同设计问题所定义的大设计空间，提出了一种基于梯度的设计方法。对具有大刚体运动的柔性驱动摆的情况进行了数值研究。研究了局部基函数集(B-样条基函数)和全局基函数集(离散正弦基函数集)对提高激励权威性的影响，表明了参数化时频分辨率对过程收敛特性和结果质量的重要性。发现了围绕特定设计点的控制和结构规则之间的锁定，从而突出了顺序设计方法的缺点。相反，控制律和结构的同时设计被认为是为了有效地探索设计空间的更大区域。
The single shooting method is applied to the optimal control and combined structural and control design (co-design) of very flexible beams. The objective is to assess feasibility, advantages and limitations of an integrated design approach when dealing with actuated structures exhibiting large oscillations and, more generally, strongly nonlinear couplings. A gradient based approach is proposed for the large design space defined by both the optimal control and co-design problems. Numerical studies are presented for the case of a very flexible actuated pendulum with large rigid-body motion. The impact of local (B-splines) and global (discrete sines) set of basis functions is investigated for increasing levels of actuation authority, showing the importance of the time–frequency resolution of the parametrisation on the convergence properties and outcome quality of the process. Locking between control and structural disciplines around specific design points is found, thus highlighting the disadvantage of a sequential design approach. Simultaneous designing of control law and structure is seen, instead, to explore efficiently larger regions of the design space.