Showing papers by "Sumeet S. Aphale published in 2014"
TL;DR: In this paper, a new vibration damping technique based on Integral Force Feedback (IFF) is described. But the proposed technique allows an arbitrary damping ratio to be achieved by introducing an additional feed-through term to the control system, which results in an extra degree of freedom that allows the position of the zeros to be modified and the maximum modal damping to be increased.
25 citations
TL;DR: In this paper, an improvement to Integral Force Feedback (IFF) damping control is proposed, which allows any arbitrary damping ratio to be achieved for a system by introducing a new feed-through term in the system.
13 citations
04 Jun 2014
TL;DR: Simulations show full damping of the first resonant mode whilst also achieving bandwidth greater than the natural frequency of the plant, allowing for high speed scanning with accurate tracking.
Abstract: Positive Velocity and Position Feedback (PVPF) is a widely used control scheme in lightly damped resonant systems with collocated sensor actuator pairs. The popularity of PVPF is due to the ability to achieve a chosen damping ratio by repositioning the poles of the system. The addition of a necessary tracking controller causes the poles to deviate from the intended location and can be a detriment to the damping achieved. By designing the PVPF and tracking controllers simultaneously, the optimal damping and tracking can be achieved. Simulations show full damping of the first resonant mode whilst also achieving bandwidth greater than the natural frequency of the plant, allowing for high speed scanning with accurate tracking.
11 citations
TL;DR: In this paper, a structured PI tracking controller is used to place a zero at a specific location to cancel the induced pole induced by the integral tracking controller, which effectively reduces the order of the system by one.
2 citations
TL;DR: In this article, a pole-placement technique was proposed to achieve substantial damping of the resonance and shift the system resonance to a substantially higher frequency, which is beneficial to a number of systems such as nanopositioners employed in Scanning Probe Microscopes, where the achievable bandwidth is severely limited by the resonant frequency of the positioner.
1 citations