On the active control of a rotor-bearing system using shape memory alloy actuators: an experimental analysis

Borges, Jader Morais; Silva, Antônio Augusto Moura da; Araújo, Carlos José de; Pimentel, Roberto Leal; Aquino, Alberdan Santiago de; Senko, Richard; Reis, Rômulo Pierre Batista dos

doi:10.1007/s40430-018-1175-8

Cited by 16 publications

(20 citation statements)

References 14 publications

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“…SMA helical springs can be successfully employed for this purpose because this geometry allows satisfactory vibration reduction and uses less quantities of material, which creates a large field of possibilities to vibration control. Other arrangements that employ different types of SMA like wires, smart rubber, and coil springs are presented in the literature (Borges et al, 2018; Enemark et al, 2015; He et al, 2007; Ma et al, 2015).…”

Section: Geometry Of Bearing Using Vibration Control With Sma Helimentioning

confidence: 99%

“…Bearing support employing four SMA helical springs on flexible bearing: (a) detail of the SMA bearing assembled on rotor and (b) SMA bearing design (Borges et al, 2018). …”

Section: Geometry Of Bearing Using Vibration Control With Sma Helimentioning

confidence: 99%

“…The prototypes mentioned previously adopt geometrical assembly and elements, such SMA helical springs, because this geometry allows for stiffness adjustments, modifying mechanical properties (Borges et al, 2018; Senko, 2018). SMA springs are able to change equivalent stiffness of rotor bearings.…”

Section: Mathematical Approachmentioning

confidence: 99%

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Design and experimental analysis of a smart bearing using shape memory alloy springs

Oliveira

Silva

Araújo

et al. 2020

Journal of Intelligent Material Systems and Structures

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Among many rotating machinery vibration sources, there is one due to resonance, when the machine operation frequency crosses the natural frequency region. This study proposes a smart bearing that employs shape memory alloy NiTi helical springs for vibration-level reduction. This smart bearing is capable of dynamically changing its stiffness during machine acceleration or deceleration, keeping its natural frequency far from resonance. Activated by Joule effect and cooled by forced air convection, the prototype installed in horizontal rotating machinery reaches reduction of vibration amplitude of about 63% (root mean square) and 73% (Peak) at critical speed, with response time between 12–15 s. Compared with the results of the reference articles, satisfactory amplitude reduction and better response time were observed.

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Section: Geometry Of Bearing Using Vibration Control With Sma Helimentioning

confidence: 99%

“…Bearing support employing four SMA helical springs on flexible bearing: (a) detail of the SMA bearing assembled on rotor and (b) SMA bearing design (Borges et al, 2018). …”

Section: Geometry Of Bearing Using Vibration Control With Sma Helimentioning

confidence: 99%

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Design and experimental analysis of a smart bearing using shape memory alloy springs

Oliveira

Silva

Araújo

et al. 2020

Journal of Intelligent Material Systems and Structures

Self Cite

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“…Shape memory alloys (SMAs) are used as an attractive actuator in robot-assisted tools [1], bio-inspired robots [2][3][4], automotive equipment [5], aerospace [6,7], soft robotics [8], damping applications [9], and MEMS devices [10] due to their high strain, adaptability to systems, and high energy density. The difference between cooling and heating paths is called a hysteresis phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Tracking control of an SMA-driven actuator with rate-dependent behavior using an inverse model of hysteresis

Shakiba

Yousefi‐Koma

Ayati

2020

J Braz. Soc. Mech. Sci. Eng.

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Hysteresis is a nonlinear phenomenon which may cause inaccuracies and delay in control applications. Shape memory alloys (SMAs) have an asymmetric saturated hysteresis. In addition, the excitation frequency changes the hysteresis behavior of SMA-driven systems and makes them challenging to track reference inputs at different frequencies. In this study, a rate-dependent Prandtl-Ishlinskii model coupled with a deadband function is proposed to characterize the asymmetric and saturated hysteresis behavior as well as its rate-dependency. Unknown parameters of the model are identified using genetic optimization algorithm in MATLAB Toolbox based on measured data. The identified model is validated to consider the excitation frequency effect with a different measured data set. The inverse model is also proposed as a compensator to mitigate hysteresis nonlinearity effects especially the frequency effect in tracking control. Although the proposed compensator cannot fully compensate for hysteresis effects, it can reduce the input-output hysteresis. The proposed rate-dependent compensator as a feedforward controller combined with a proportional-integral-derivative (PID) controller as a feedback mitigates hysteresis effects. The PID controller is used to improve the accuracy of compensated system and remove the steady-state error. Experimental results illustrate that the proposed controller has a great accuracy in tracking control to consider the excitation frequency effect as well as the asymmetric saturated hysteresis.

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“…Shape memory alloys (SMAs) have been widely utilized as an actuation source of devices in scientific research and industrial applications in many areas such as robotics, orthodontic treatment, aerospace engineering, biotechnology and medical devices and civil engineering structures (see [1][2][3][4][5]). The actuators based on SMA are silent, compact in size, noiseless, biocompatible and excellent in power-to-weight ratio when compared to traditional actuators.…”

Section: Introductionmentioning

confidence: 99%

Development of a cascade position control system for an SMA-actuated rotary actuator with improved experimental tracking results

Moghadam

Zakerzadeh

Ayati

2019

J Braz. Soc. Mech. Sci. Eng.

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Hysteresis and significant nonlinearities in the stress-strain-temperature characteristics of shape memory alloy (SMA) actuators prevent effective utilization of these actuators and make them difficult to control. Due to these effects, the position control of SMA actuators has been a great challenge for many industrial applications. In this study, a cascade control for position tracking using torque and position measurement of an SMA-actuated rotary actuator is considered. The effects of the SMA characteristic model on control performance are also focused when simulation consequences are directly applied in practice. Based on nonlinear and unknown dynamics of an SMA actuator, a torque regulation adaptive controller using modified Brinson model is developed that requires to approximate the parameters of the system by only measuring SMA force and actuator rotation. Although it is shown that only an approximate model of the system is sufficient to develop the proposed controller, the system dynamic is simulated using MATLAB software, and the characteristics of SMA wire is considered by both modified Brinson constitutive model and Liang and Rogers constitutive model. The controller gains are regulated for both of the mentioned models using simulation. Finally, the performance of both controllers is further evaluated experimentally, and the accuracy of the proposed controller based on the modified Brinson model is compared to the controller based on the Liang and Rogers model. It is shown that since the Brinson model has a better prediction of the SMA wire behavior, the simulation results based on the modified Brinson model have better conformity to reality.

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On the active control of a rotor-bearing system using shape memory alloy actuators: an experimental analysis

Cited by 16 publications

References 14 publications

Design and experimental analysis of a smart bearing using shape memory alloy springs

Design and experimental analysis of a smart bearing using shape memory alloy springs

Tracking control of an SMA-driven actuator with rate-dependent behavior using an inverse model of hysteresis

Development of a cascade position control system for an SMA-actuated rotary actuator with improved experimental tracking results

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