This paper presents a slew maneuver control design of three-axis rotational flexible spacecraft. The focus of the work is to investigate the nonlinear effect of the three axis maneuver for a flexible spacecraft when a vibration suppression technique for linear systems such as input shaping is used in the control design. A simple method of slewing three-axis rotational spacecraft using input sha...

In general, microelectromechanical systems (MEMS) are excited using a nonlinear electrostatic field. Due to the nonlinearity, the frequency of the device response to a step input depends on the input magnitude. As a result, traditional shaping techniques which are based on linear theory fail to provide good performance over the whole voltage range. In this paper, we develop a new methodology fo...

Abstract: The main objective of this work is to analyze the brushless DC (BLDC) motor drive system with input shaping using classical control theory. In this paper, different values of damping ratio are used to understand the generalized drive performance. The transient response of the BLDC motor drive system is analyzed using time response analysis. The dynamic behaviour and steady state perfo...

When a robot manipulator is required to be light, long or to move quickly, its link tends to flex. When the link flexes, its end position is difficult to control. In fact, the flexibility brings about undesirable attributes such as non-minimum phase, tip vibration and complicated dynamics. As a result, in contrast to a rigid-link robot, control of the flexible-link robot is more challenging and...

This paper presents experimental investigations into the applications of feedforward control schemes for vibration control of a flexible manipulator system. Feedforward control schemes based on input shaping and filtering techniques are to be examined. A constrained planar single-link flexible manipulator is considered in this experimental work. An unshaped bang-bang torque input is used to det...

Input shaping is a method of reducing residual vibrations in computer-controlled machines. Shaped command profiles are generated by convolving a sequence of impulses, an input shaper, with the desired command signal. The shaped command profile will move the system without residual vibration. The performance of several types of input shapers is compared to the time-optimal flexible-body control ...

Input command shaping for temperature control of fast-ramp RTP systems is investigated from an open-loop-input point of view, i.e., for a given desired temperature recipe a set of lamp command profiles is determined such that the resulting set of measured temperatures approaches the desired recipe as closely as possible. Because of the inherent nonlinear behavior of RTP systems, a command shapi...