Generalized spiral torsion spring model

Muñoz-Guijosa, Juan Manuel; Caballero, Daniel Fernández; Cruz, Víctor Rodríguez de la; Sanz, José Luis Muñoz; Echávarri, Javier

doi:10.1016/j.mechmachtheory.2011.12.007

Cited by 29 publications

(14 citation statements)

References 2 publications

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“…The maximum stress does not coincide with the maximum energy density, because it reaches a point at which even though the stress in the traction zone begins to decrease, the total thickness of the crosssection also decreases; the traction stress that is achieved is very close to the maximum. This decrease in thickness offsets the drop in stress and the energy density therefore increases until it reaches the optimum cross-section with respect The energy density that could theoretically be reached with this cross-section is 0.924 Wh/kg, resulting in an increase of approximately 50% with respect to the optimized rectangular cross-section [20] and [21].…”

Section: Example Of Design and Analysis Of The Parametrization Et − Nmentioning

confidence: 98%

See 1 more Smart Citation

Optimization of Energy Density in Girders under Pure Bending with an Extruded Monolithic Cross-Section

Caballero¹,

Cruz²,

Muñoz-Guijosa³

2019

WJM

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Section: Example Of Design and Analysis Of The Parametrization Et − Nmentioning

confidence: 98%

“…A change of curvature of and a torque of M = 6667 N•m will be considered; for a width factor of n = 2. Table 1 shows the results obtained for the thickness of the traction skin [20] and [21].…”

Section: Example Of Design and Analysis Of The Parametrization Et − Nmentioning

confidence: 99%

Optimization of Energy Density in Girders under Pure Bending with an Extruded Monolithic Cross-Section

Caballero¹,

Cruz²,

Muñoz-Guijosa³

2019

WJM

View full text Add to dashboard Cite

show abstract

“…For solving the vibration mode ϕ(x), f x, t is ignored. Then, by substituting (8) into (6), the method of variable separation is used and it can be acquired…”

Section: Modelling Of Pmsm Under Stator Current Vector Orientationmentioning

confidence: 99%

“…The technology of mechanical elastic energy storage with STS as energy storage medium is a newly proposed energy storage method [4,5]. Owing to its high security, high efficiency, no pollution, easy to use, and no loss in spare time, the technology has gradually attracted the attention to some extent [6,7].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous suppression of torque ripple and flexible load vibration for PMSM under stator current vector orientation

Cong

Xia

et al. 2019

IET Electric Power Applications

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Torque ripple of permanent magnet synchronous motor (PMSM) will result in the distortion of current waveform and the load flexibility of spiral torsion spring (STS) will affect the control performance of driving system. This study focuses on a new control problem of simultaneous suppression of PMSM's torque ripple and flexible load's vibration. First, the Lagrange equation is used to establish the dynamic model of STS to describe its vibration mode. The overall model of STS directly derived by PMSM under stator current vector orientation is built. Then, based on the magnetic co-energy model of electromagnetic torque of PMSM, the constraint relation of optimal stator harmonic current under the condition of torque ripple minimisation is derived, and the controller based on stator current oriented closed-loop I/f control to suppress load vibration and torque ripple simultaneously is presented through backstepping control. A wide speed range identification method based on the least-square algorithm with a forgetting factor is also designed. The simulation and experiment show that the speed identification algorithm can estimate the speed accurately in a wide range. The proposed control scenario improves control performance, smoothes current waveform and inhibits torque ripple and load vibration effectively.

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“…These types of structures can be modeled as pure bending beams [10] . The base beam with no defects was designed using the materials shown in Table 1 .…”

Section: Design Of Sandwich Beam: No Defects Modelmentioning

confidence: 99%

Influence of skin wrinkles and resin insertions in maximum stress of transitions of pure bending sandwich beams

Caballero

Cruz

Muñoz-Guijosa

et al. 2015

Science and Engineering of Composite Materials

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The sandwich beam has emerged as a part of new engineering applications in recent years. Dimensional and mechanical control tests are used to avoid possible service failures. Sandwich beams are modeled as large deflection pure bending beams with monolithic ends. The manufacturing process of sandwich beams can lead to different dimensional and shape defects such as wrinkles in traction and compression skins, insertions of epoxy resin in foam core or in the skins, shape defects of the foam, etc. In order to study the maximum stress behavior of beams with different types of defects, a specific finite element model (FEM) has been developed. Finally, the results of FEM analysis are validated using experimental tests. The implications of these findings on the structural integrity of glass-fiber-reinforced polymer (GFRP)-foam sandwich composites are discussed.

show abstract

Generalized spiral torsion spring model

Cited by 29 publications

References 2 publications

Optimization of Energy Density in Girders under Pure Bending with an Extruded Monolithic Cross-Section

Optimization of Energy Density in Girders under Pure Bending with an Extruded Monolithic Cross-Section

Simultaneous suppression of torque ripple and flexible load vibration for PMSM under stator current vector orientation

Influence of skin wrinkles and resin insertions in maximum stress of transitions of pure bending sandwich beams

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