Robust Access Control for a Positioning Mechanism with Mechanical Flexibility.
TLDR
In this article, a vibrationless access control which is robust for parameter variations is proposed. But, the authors consider the case where the control force has no frequency component within the range of varying natural frequencies.Abstract:
This paper describes a vibrationless access control which is robust for parameter variations. It is important for the vibrationless access control of a positioning mechanism with mechanical flexibility to eliminate residual vibration at a target position even if natural frequencies of the mechanism vary. From the relation between the residual vibration amplitude and the frequency spectrum of feedforward control force, it is found that the control force can be robust for the natural frequency variations if the control force has no frequency component within the range of varying natural frequencies. In the proposed method, an enlarged system is first constructed in the modal coordinates for a virtual mechanism which has a few natural frequencies within the varying range of the concerned natural frequency. The optimal control theory is next applied to the enlarged system and the vibrationless feedforward control force is calculated. The improved robustness of the proposed vibrationless access control is demonstrated with experimental results.read more
Citations
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Journal ArticleDOI
Robust motion control of flexible systems using feedforward forcing functions
Peter H. Meckl,R. Kinceler +1 more
TL;DR: Simulation results indicate superior vibration attenuation compared to the minimum-energy forcing function, especially when some error in natural frequency exists.
Proceedings ArticleDOI
Feedforward Control Considering Input and States Constraints with Eliminating Residual Vibration
TL;DR: Compared to conventional techniques, this technique can hold at all times the residual vibration to an extremely low value no matter how the resonance frequency of the plant may fluctuate within the range of the estimate.
Proceedings ArticleDOI
Robust vibration suppression control profile generation based on time-frequency uncertainty
Li Zhou,Eduardo A. Misawa +1 more
TL;DR: In this article, a robust control profile is generated which suppresses all the high frequency resonant dynamics in a flexible dynamic system, which is the shifted time-limited version of the functions that optimally achieve the time-frequency localization.
Proceedings ArticleDOI
Input command shaping techniques for robust, high-performance control of flexible structures
Sungyung Lim,Jonathan P. How +1 more
TL;DR: Key advantages of the convex approach for complex systems are that it does not require a priori knowledge of the input profile, and it enables much greater flexibility for including additional actuator, performance, and robustness metrics.
Proceedings ArticleDOI
Time optimal voltage-constrained deceleration velocity profile design for disk drives
TL;DR: A time optimal voltage-constrained deceleration velocity profile is derived for a disk drive with a rotary head positioning actuator that makes better utilization of both supply voltage and actuator motor back EMF.
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