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Two cost functions, based on the disturbance sensitivity grammian, are presented that can be used to find the optimal position of an active vibration control actuator. The disturbance sensitivity grammian is a novel parameter in the field of active vibration control, and by minimizing the "size"...
The control of a two-link manipulator with a sliding flexible link that traverses inside a rigid link is considered. Since the plant possesses time-varying dynamics that change with the position of the tip, and considerable uncertainty, a fixed controller is unsatisfactory in terms of both...
Isoparametric element tends to lock in shear for very thin plates. Though numerical techniques such as reduced-integration or selective reduced-integration are used to avoid this effect, they do not necessarily guarantee the solution to the problem, even if they increase notably the possibility...
This paper considers the design of open-loop fuel/time optimal controllers for flexible space struc tures using a frequency domain approach. The control system consists of a time-delay filter whose output signal is the optimal control profile when it is subject to a step input. A constrained...
A mechanical actuator to generate adjustable force and its control algorithm have been developed to reduce ship structural vibration of a single harmonic component of main engine rotating frequency The actuator generates a unidirectional sinusoidal force using the vectorial sum of centrifugal...
The application of repetitive control to the problem ofattenuation of vibration in a class of engineer ing structures excited by periodic disturbances occurring at a fundamental frequency and its integer multiples is examined. The internal model principle is employed to design controllers for a...
The primary objective of this paper is to present new periodic control strategies for the control of flapping motion of an individual helicopter rotor blade in forward flight, which is represented by a differential equation with periodic coefficients. First, an algebraic procedure based on...
The concept of the linear active resonator (LAR) as a vibration absorber is presented. It is formed of a classical passive absorber with a simple dynamic linear feedback. The LAR is, on one hand, a well-known passive absorber but has, on the other hand, an additional actuator that produces a...
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