Performance Analysis and Experimental Research of Electromagnetic-Ring Active Balancing Actuator for Hollow Rotors of Machine Tool Spindles

Pan, Xiaoyi; He, Xiaotian; Wei, Kunzhu; Wu, Haiyan; Jun, Gao; Jiang, Zhinong

doi:10.3390/app9040692

Cited by 8 publications

(9 citation statements)

References 22 publications

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“…However, the explicit method can avoid the highdimensional integral problem in the uncertainty inverse problem using the sensitive matrix together with the similar leastsquares form; it is still difficult to search the for optimal value of unknown parameters in many cases. This is because such an unbalanced response Y may not be linear to the input unknown eccentricity to produce divergence due to the unknown eccentricity interval and difficulty to converge due to the sensitivity of the initial value problem (Triet et al, 2020). To effectively overcome the problem, it has been proposed to introduce the micro-genetic algorithm and advance and retreat method to the maximum likelihood method in this paper, so that the initial value and interval in each iteration are variable, and the initial value starts from zero.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Identification of eccentricity of a motorized spindle-tool system with random parameters

2021

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Abstract. In order to improve the efficiency of identifying parameters using the maximum likelihood method and to avoid the sensitivity of initial values, a proposed method that combines the micro-genetic algorithm with the advance and retreat method is presented in order to identify the eccentricity of the spindle-tool system with random input and output parameters, which obey a certain probability distribution. Eccentricity without prior information is determined through an iterative procedure. The initial value starts from zero, and the interval is determined by the advance and retreat method. Then, the optimal value is searched in the corresponding interval, utilizing the micro-genetic algorithm. The initial value and interval at each of iterations are changed to ensure a fast and stable convergence. Eventually, a numerical example with three kinds of random deviations verifies the feasibility and validity of the proposed method.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Identification of eccentricity of a motorized spindle-tool system with random parameters

2021

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“…However, due to the separated structure of coil and counterweight, the existing EM actuator is quite difficult to install on site. To solve the problem, Pan et al [146] invented an integrated structure of dynamic and static ring, as shown in Figure 39. The equalization experiments were conducted at 3600 r/min, and therefore the novel mechanism can cut back the unbalance vibration by 87.5% among twenty seconds.…”

Section: Electromagnetic Actuatormentioning

confidence: 99%

A Review on Self-Recovery Regulation (SR) Technique for Unbalance Vibration of High-End Equipment

Pan

Huo

et al. 2020

Chin. J. Mech. Eng.

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The high-end equipment represented by high-end machine tools and aero-engines is the core component of the national intelligent manufacturing plan, and the mass unbalance is the main reason for its excessive vibration, that seriously impacts the operation efficiency and running life of the equipment. In order to change the traditional way that the fault of equipment can only be repaired by human, the self-recovery mechanism of human and animal are given to the equipment in this paper, which forms the self-recovery regulation (SR) system for unbalance vibration of high-end equipment. The system can online generate the self-recovery force to restrain the unbalance vibration of the equipment in operation, which is an important direction for the development of the equipment to the advanced intelligent stage. Based on the basic principles of SR technique, the typical engineering application cases of this technique in the field of aeroengine and high-end machine tools are introduced, and four related studies promoting the development of this technique are summarized and analyzed in turn. It includes feature extraction, imbalance location, regulation method and balancing actuator. Self-recovery Regulation (SR) Technique is an important way to realize intelligent manufacturing and intelligent maintenance. Relevant research can lay a technical foundation for the development of high-end equipment with self-health function.

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“…The gap between the rotating and non-rotating parts should be less than 0.5 mm, which makes the installation difficult. Integrative electromagnetic-ring balancing actuators solve these problems to a certain degree [30]. For example, the gap between the moving and static parts does not require adjustment during installation.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Novel Electromagnetic-Ring Active Balancing Actuator with Radial Excitation

Pan

et al. 2021

Chin. J. Mech. Eng.

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Imbalance vibration is a typical failure mode of rotational machines and has significant negative effects on the efficiency, accuracy, and service life of equipment. To automatically reduce the imbalance vibration during the operational process, different types of active balancing actuators have been designed and widely applied in actual production. However, the existing electromagnetic-ring active balancing actuator is designed based on an axial excitation structure which can cause structural instability and has low electromagnetic driving efficiency. In this paper, a novel radial excitation structure and the working principle of an electromagnetic-ring active balancing actuator with a combined driving strategy are presented in detail. Then, based on a finite element model, the performance parameters of the actuator are analyzed, and reasonable design parameters are obtained. Self-locking torque measurements and comparative static and dynamic experiments are performed to validate the self-locking torque and driving efficiency of the actuator. The results indicate that this novel active balancing actuator has sufficient self-locking torque, achieves normal step rotation at 2000 r/min, and reduces the driving voltage by 12.5%. The proposed novel balancing actuator using radial excitation and a combination of permanent magnets and soft-iron blocks has improved electromagnetic efficiency and a more stable and compact structure.

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Performance Analysis and Experimental Research of Electromagnetic-Ring Active Balancing Actuator for Hollow Rotors of Machine Tool Spindles

Cited by 8 publications

References 22 publications

Identification of eccentricity of a motorized spindle-tool system with random parameters

Identification of eccentricity of a motorized spindle-tool system with random parameters

A Review on Self-Recovery Regulation (SR) Technique for Unbalance Vibration of High-End Equipment

Optimal Design of Novel Electromagnetic-Ring Active Balancing Actuator with Radial Excitation

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