TL;DR: In this paper, a method for generating shaped command inputs which significantly reduce or eliminate endpoint vibration is presented for the Space Shuttle Remote Manipulator System simulator (DRS), where the desired system inputs are altered so that the system completes the requested move without residual vibration.
Abstract: A method is presented for generating shaped command inputs which significantly reduce or eliminate endpoint vibration. Desired system inputs are altered so that the system completes the requested move without residual vibration. A short move time penalty is incurred (on the order of one period of the first mode of vibration). The preshaping technique is robust under system parameter uncertainty and may be applied to both open and closed loop systems. The Draper Laboratory’s Space Shuttle Remote Manipulator System simulator (DRS) is used to evaluate the method. Results show a factor of 25 reduction in endpoint residual vibration for typical moves of the DRS.
TL;DR: A review of command-shaping research since it was first proposed in the late 1950s can be found in this paper, where the important milestones of the research advancements, as well as application examples are used to illustrate the developments in this important research field.
Abstract: The control of flexible systems is a large and important field of study. Unwanted transient deflection and residual vibration are detrimental to many systems ranging from nano-positioning devices to large industrial cranes. Thousands of researchers have worked diligently for decades to provide solutions to the challenging problems posed by flexible dynamic systems. The work can roughly be broken into three categories:1) Hardware design, 2) Feedback control, and 3) Command shaping. This paper provides a review of command-shaping research since it was first proposed in the late 1950’s. The important milestones of the research advancements, as well as application examples, are used to illustrate the developments in this important research field.
TL;DR: In this article, a combined feedback and input shaping controller is developed for a 10-ton bridge crane at the Georgia Institute of Technology to address both sources of oscillation, and the controller achieves good positioning accuracy and significant sway reduction.
TL;DR: In this paper, the dynamic behavior of a planar gantry crane with hoisting of the load is investigated and the command generation method of input shaping is proposed for reduction of the residual vibration.