Towards Comprehensive Modeling and Large Angle Tracking Control of a Limited Angle Torque Actuator with Cylindrical Halbach

Chen, Silu; Kamaldin, Nazir; Teo, Tat Joo; Liang, Wenyu; Teo, Chek Sing; Yang, Guilin; Tan, Kok Kiong

doi:10.1109/tmech.2015.2443016

Cited by 27 publications

(8 citation statements)

References 18 publications

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“…The first is a corresponding control method for adapting the complex characteristics [17]. A robust position controller is proposed for the LATM applied in fuel control of gas turbine engines [18].…”

Section: Introductionmentioning

confidence: 99%

“…As the voice coil motor is a kind of LATM, this control method is also of reference value for other LATMs. A robust output feedback control with high-gain observer is proposed to handle both model uncertainty and the angular-dependent nonlinear current torque relationship of the LATM with the cylindrical Halbach magnetic array in [17]. By this method, the LATM can track the sinusoidal position signal in the range of 60°, and the error is no more than 0.87%.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Operational range extension method for limited‐angle torque motors with irregular slot numbers

Wang

et al. 2021

IET Electric Power Appl

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A modified model of a limited-angle torque motor (LATM) with irregular slot numbers is proposed for developing an operational range extension method for LATMs. The modified model is derived by considering the effects of the asymmetrical winding structure and magnetic flux leakage, which are validated by finite element analysis and experimental measurements. Based on the modified model, accuracy and time consumption of the simulation can be improved. For the operational range extension method, extended angle range selection theory and constraint conditions are proposed, and the relationship between the sinusoidal tracking characteristic and leading parameters is established by theoretical analysis. A simulation and a prototype machine experiment on an LATM using the new method are carried out. The results show that the proposed operational range extension method can reduce the weight and volume of the LATM without changing sinusoidal tracking characteristics, which proves the feasibility of applying the new method in the oscillating scan system to realize lightness and miniaturisation of the system.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Operational range extension method for limited‐angle torque motors with irregular slot numbers

Wang

et al. 2021

IET Electric Power Appl

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“…The experimental results showed that the bending mode of the boring bar was actively damped, and the dynamic stiffness of the system increased significantly. To increase the damping and static stiffness of the boring bar during cutting, Chen et al [19,20] designed a 3-degree freedom linear magnetic actuator. Cutting tests showed that the cutting rate could be improved using this method.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Composite Boring Bar Dynamic Characteristics Considering Shear Deformation and Rotational Inertia

Zhang

Ren

et al. 2020

Applied Sciences

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A boring bar is a tool used to install cutters and transfer power during boring. Because the boring bar in a narrow workspace is usually slender, chatter often occurs in the boring process. To improve the chatter stability of the boring bar, researchers have designed composite material boring bars with high dynamic stiffness to meet the requirements of high-speed boring. However, the effect of the shear deformation and rotational inertia were ignored. In this paper, a model of a composite boring bar considering shear deformation and rotational inertia is established based on the Adomian Modified Decomposition Method (AMDM). The dynamic characteristics, such as the vibration mode shapes, natural frequency, and chatter stability of the composite boring bar considering the shear deformation and rotational inertia, are analyzed comprehensively. The analysis results show that, when the shear deformation and rotational inertia are considered, the composite boring bar can exhibit different vibration mode shapes. Moreover, the natural frequencies and the cutting depth will be reduced. The results are helpful to improve the understanding about dynamic characteristics of the composite boring bar, and to provide guidance for designing of boring bars. Moreover, accurate adjustment of the cutting speed and depth in CNC boring can be based on the analysis results.

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“…The advantages of quasi-Halbach arrays are well known, and include applicability for a wide range of electromechanical devices [ 6 ]. Even so, there are still recent developments and designs for specific applications under research, such as, for example, for limited angle torque actuators [ 7 ] and for assemblies in which the flux density can be altered by a mechanical operation [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Design Methodology of a Dual-Halbach Array Linear Actuator with Thermal-Electromagnetic Coupling

Eckert

Filho

Perondi

et al. 2016

Sensors

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This paper proposes a design methodology for linear actuators, considering thermal and electromagnetic coupling with geometrical and temperature constraints, that maximizes force density and minimizes force ripple. The method allows defining an actuator for given specifications in a step-by-step way so that requirements are met and the temperature within the device is maintained under or equal to its maximum allowed for continuous operation. According to the proposed method, the electromagnetic and thermal models are built with quasi-static parametric finite element models. The methodology was successfully applied to the design of a linear cylindrical actuator with a dual quasi-Halbach array of permanent magnets and a moving-coil. The actuator can produce an axial force of 120 N and a stroke of 80 mm. The paper also presents a comparative analysis between results obtained considering only an electromagnetic model and the thermal-electromagnetic coupled model. This comparison shows that the final designs for both cases differ significantly, especially regarding its active volume and its electrical and magnetic loading. Although in this paper the methodology was employed to design a specific actuator, its structure can be used to design a wide range of linear devices if the parametric models are adjusted for each particular actuator.

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Towards Comprehensive Modeling and Large Angle Tracking Control of a Limited Angle Torque Actuator with Cylindrical Halbach

Cited by 27 publications

References 18 publications

Operational range extension method for limited‐angle torque motors with irregular slot numbers

Operational range extension method for limited‐angle torque motors with irregular slot numbers

Analysis of the Composite Boring Bar Dynamic Characteristics Considering Shear Deformation and Rotational Inertia

Design Methodology of a Dual-Halbach Array Linear Actuator with Thermal-Electromagnetic Coupling

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