An optimal vibration control logic for minimising fatigue damage in flexible structures

Ambrosio, Pasquale; Cazzulani, Gabriele; Resta, Ferruccio; Ripamonti, Francesco

doi:10.1016/j.jsv.2013.11.010

Cited by 29 publications

(12 citation statements)

References 16 publications

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“…In detail, for this application, an LQR modal control, based on the adaptation of the modal parameters is introduced to test the results of the identification algorithm. As known from literature [12], LQR control is based on the calculation of the control gains based on the minimization of the following cost function can be noticed that the control is able to recognize all the natural frequencies of the structure, reducing the vibration amplitude associated to the corresponding modes. On the contrary, the 77 Hz frequency is recognized as a disturbance frequency and the vibration components at that frequency are not reduced by active control.…”

Section: Resultsmentioning

confidence: 99%

An adaptive optimal control for smart structures based on the subspace tracking identification technique

et al. 2014

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A new method for the real-time identification of mechanical system modal parameters is used in order to design different adaptive control logics aiming to reduce the vibrations in a carbon fiber plate smart structure. It is instrumented with three piezoelectric actuators, three accelerometers and three strain gauges. The real-time identification is based on a recursive subspace tracking algorithm whose outputs are elaborated by an ARMA model. A statistical approach is finally applied to choose the modal parameter correct values. These are given in input to model-based control logics such as a gain scheduling and an adaptive LQR control

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Section: Resultsmentioning

confidence: 99%

An adaptive optimal control for smart structures based on the subspace tracking identification technique

et al. 2014

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“…One of the most efficient way to reduce vibration is to actively increase the system damping and, as a consequence, the energy dissipation associated to it [15][16][17][18][19][20][21][22]. The control forces can be designed as…”

Section: The Need Of Co-located Measurementsmentioning

confidence: 99%

On the use of electrical and optical strain gauges paired to magnetostrictive patch actuators

et al. 2014

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Giant Magnetostrictive Actuators (GMA) can be profitably used in application of vibration control on smart structures. In this field, the use of inertial actuators based on magnetostrictive materials has been consolidate. Such devices turn out to be very effective in applications of vibration control, since they can be easily paired with sensors able to ensure the feedback signal necessary to perform the control action. Unlike most widespread applications, this paper studies the use of patch magnetostrictive actuators. They are made of a sheet of magnetostrictive material, rigidly constrained to the structure, and wrapped in a solenoid whose purpose is to change the intensity of the magnetic field within the material itself. The challenge in the use of such devices resides in the impossibility of having co-located sensors. This limit may be exceeded by using strain gauge sensors to measure the deformation of the structure at the actuator. This work analyzes experimentally the opportunity of introducing, inside a composite material structure, both the conventional electric strain gauges and the less conventional optical sensors based on Bragg's gratings. The performance of both solutions are analyzed with particular reference to the signal to noise ratio, the resolution of the sensors, the sensitivity to variations of the electric and magnetic fields and the temperature change associated with the operation of the actuator.

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“…Vibrations suppression, feedforward and feedback actions, disturbance estimator, and modal control were researched. Modal space control method is used to reduce the tip vibration and trajectory control [23][24][25][26][27][28]. Lenord et al studied a flexible hydraulic mobile concrete pump truck.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of Truck Mounted Concrete Pump Boom by Virtual Prototyping

Ren

et al. 2017

Journal of Robotics

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By far there is lack of research on different working conditions between rigid and flexible dynamics of truck mounted concrete pump booms. First a 3D model has been established by using virtual prototyping technology of a 37 m long boom in Pro/Engineering software. Then the rigid body simulation model has been built. Next modal superimposition method is adopted to change the 4 rigid body booms into flexible ones. Kinematics law and dynamic characteristics of 4 common working conditions had been studied then. Next tip displacement and the first boom hydraulic cylinder force of the 4 working conditions between rigid and flexible models have been researched. Furthermore the first natural frequencies of the structure have been calculated. The results show that the frequency of the horizontal condition has the lowest of all and the roof condition has the largest of all. Besides the cylinder forces of the flexible model are larger than the corresponding rigid ones because of the flexible boom vibration. Finally an experiment has been done on a boom test rig which proved that the established simulation model is reasonable and the frequency results are correct. All of these provide design reference to mechanical manipulator as well as reducing product development cost of such mechanism.

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An optimal vibration control logic for minimising fatigue damage in flexible structures

Cited by 29 publications

References 16 publications

An adaptive optimal control for smart structures based on the subspace tracking identification technique

An adaptive optimal control for smart structures based on the subspace tracking identification technique

On the use of electrical and optical strain gauges paired to magnetostrictive patch actuators

Modeling and Analysis of Truck Mounted Concrete Pump Boom by Virtual Prototyping

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