Study on Dynamic Performance of Linear Direct Drive Based on Pole Placement

Abstract

Permanent magnet linear synchronous motors (PMLSM) can serve as direct drive actuators for machine tools. However, PMLSM is more easily affected by load disturbance, force ripple and parameter variation. As a result, the design of an appropriate controller and research on dynamic performance are very important for PMLSM. In this paper, a feedback controller based on pole-placement is proposed to achieve desired tracking performance. The effectiveness and feasibility of the proposed method are demonstrated through theoretical analysis. The dynamic response and disturbance rejection ability for linear servo system were researched and the parameters which influence the dynamic performance of the system were discussed.

A nonprobabilistic time-variant reliability-based optimization approach to the reliable active controller design of structural vibration considering convex uncertainties

“…As is known to all, the control law, which is the “brain” of the active control system, plays an important role in vibration rejecting effects, and hence different controllers must lead to different control effects . To date, there have been great many research works on control strategies that achieve optimal controller designs, such as pole placement technologies, optimal control theories, and adaptive control policies . Traditional pole placement approach may not guarantee the uniqueness of the feedback control matrix and will be infeasible when dealing with the incomplete state feedback problem and the repetitive frequency control issue (weak engineering applicability); the adaptive control strategy, however, needs to assume that the disturbance source can be measured and has to achieve the online identification with respect to the transfer function of the control error path (computational versatility is not good enough) .…”