... Φ = projection matrix 3D printing scanning strategy laser powder bed fusion optimal control residual stress deformation Remark. Notice that the formulation of the feature-level state-space equation in Eq. (4) and the optimization in Eq. (7) allows a variable number...

... studied to mitigate chatter and expand the boundary of machining stability. This paper presents a discrete time-delay optimal control method for chatter suppression. A dynamical model incorporating the time-periodic and time-delayed characteristic of active chatter suppression during the milling process...

... the influence of these factors, thus eliminating the risk of rapid drill wear and catastrophic drill breakage. 21 02 2007 07 08 2007 12 05 2008 controllers cutting cutting tools drilling field buses fuzzy control optimal control The high-performance drilling (HPD) process...

...C. Mei; J. G. Cherng; Y. Wang Chatter, a violent relative vibration between a workpiece and a cutting tool, is a frequent problem in a machining operation. Among the many factors which contribute to the problem, regenerative chatter is found to be the most detrimental. Optimal control is designed...

... programming was applied to a simulation of the cylindrical grinding process in order to explore the characteristics of optimal grinding cycles. Optimal cycles were found to consist of distinct segments each with predominant constraints. An optimal control policy was formulated with the infeed rate within each...

... cycle. The simulated optimal cycles were found to consist of distinct segments with predominant constraints. This provided the basis for an optimal control policy whereby the infeed rate is determined according to the active constraint at each segment of the cycle. Accordingly, the controller...

... we propose an integrated control scheme combining both of them. In this paper the theory of the sequential logic control and the optimal control for flow progression manipulation in RTM is reviewed first. An integrated control approach is then proposed. Simulation results show that the control...