A novel design method for 3D elliptical vibration-assisted cutting mechanism

Zhang, Chen; Song, Yun hye

doi:10.1016/j.mechmachtheory.2019.01.007

Cited by 16 publications

(4 citation statements)

References 23 publications

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“…Piezoelectric actuators have several advantages, including their small size, light weight, strong driving force, low noise, nanometer-level resolution, ultra-high repeatable positioning accuracy, and excellent dynamic characteristics. As a result, they find wide application in fields such as precision manufacturing [6], biomedicine [7], ultra-precision micro-and nano-processing [8,9], aerospace [10], robotics [11], and precision optics [12]. PZT FSM offers advantages such as fast response speed, high pointing accuracy, a high resonant frequency, and strong resistance to electromagnetic interference.…”

Section: Hysteresis Modelingmentioning

confidence: 99%

Research on Bandwidth Improvement of Fine Tracking Control System in Space Laser Communication

Lv,

Liu,

Gao

et al. 2023

Photonics

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Piezoelectric fast steering mirror (PZT FSM) is the core component of the fine tracking system for space laser communication, and its actuator is a piezoelectric ceramic. Consequently, there is a hysteretic nonlinear disturbance throughout the entire range of the FSM’s steering. To enhance the fine tracking system’s performance, this paper innovatively analyzes and verifies the effect of the PZT FSM hysteresis characteristics on the error suppression bandwidth of the fine tracking system. Firstly, the rate-dependent hysteresis model is established by serially connecting the Prandtl–Ishlinskii (P-I) model with the dynamic linear mode. The inverse model is designed as a feedforward controller, followed by the conduction of open-loop feedforward compensation experiments. Subsequently, we propose a compound control method based on the rate-dependent hysteresis mode and conduct a simulation analysis. Finally, the experimental platform for the fine tracking system is set up, and the optimization effect of compensating for hysteresis nonlinearity on the fine tracking system is verified. The experimental results show that the nonlinearity of the PZT FSM is improved by 30% in the middle- and high-frequency ranges, and the error suppression bandwidth of the fine tracking system is improved by 41.7%. This effectively enhances the fine tracking system’s error suppression capability.

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Section: Hysteresis Modelingmentioning

confidence: 99%

Research on Bandwidth Improvement of Fine Tracking Control System in Space Laser Communication

Lv,

Liu,

Gao

et al. 2023

Photonics

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show abstract

“…On the other hand, ultrasonic elliptical with vibrations assisted cutting is gaining favor because of its importance to scholars' improved cutting endurance, outstanding machining precision, and decreased cutting device wear [34][35][36][37][38]. For example, Nath et al [39] found that using the ultrasonic elliptical with vibrations-assisted cutting (UEVAC) technology and lowering the speed ratio during tungsten carbide cutting might reduce the force of cutting and tool flank wear while improving surface smoothness.…”

Section: Introductionmentioning

confidence: 99%

Mechanics of AlCuNiTi alloy orthogonal micro-cutting

Nguyen,

Fang

2023

Modelling Simul. Mater. Sci. Eng.

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The mechanical behavior of AlCuNiTi alloy during orthogonal micro-cutting consists of conventional cutting and complex-dimensional vibration cutting (CDVC) are investigated using molecular dynamics (MD). The material removal mechanism is studied in terms of phase angle, amplitude ratio, and vibration frequency. In both techniques, the stress and strain are localized in the contiguous location between the sample and the cutting tool. The sample temperature during CDVC is noticeably greater than during classical cutting, which might benefit the transition phase and make CDVC smoother. The total mean value cutting force of the CDVC decreases as the frequencies of vibration and ratios of amplitude increase; however, the mean values of force under the CDVC with different phase angles demonstrate hardly ever statistically significant change. The quantity of atoms in the chip indicates that the machined surface rate is higher under the CDVC, with a higher frequency of vibration, smaller phase angle, and amplitude ratio. Under CDVC, the chip of plastic deformation gets more pronounced and severe with a frequency of oscillation at 150 GHz, an amplitude at 1.5, and a phase angle degree of 75○ due to the lowest cutting ratio.

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“…For decades, EVC devices evolved from 2D to 3D, and many experiments verified their superiority in the machining of difficult-tomachine materials. Since the 1990s, in-depth research works have been conducted on elliptical vibration cutting and designing EVC devices (Tan et al, 2018;Kim and Loh, 2007;Zhang and Song, 2019). The machinability of difficult-toprocess material was also examined in Lu et al (2017) and Dong et al (2020), and path planning was reported on in Kim and Loh (2008), Jieqiong et al (2013) and so on.…”

Section: Introductionmentioning

confidence: 99%

Parameter tuning of robust adaptive fuzzy controller for 3D elliptical vibration-assisted cutting

Wang

et al. 2021

Mech. Sci.

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Abstract. Elliptical vibration cutting (EVC), as a precision machining technology, is used in many applications. In precision machining, control accuracy plays an essential role in improving the machinability of difficult-to-machine materials. To improve the control accuracy, dynamic and static characteristics of the system need to be tuned to obtain the optimal parameters. In this paper, we use a glowworm algorithm with an improved adaptive step size to tune the parameters of a robust adaptive fuzzy controller. We then obtain the optimal controller parameters through simulation. The optimal solution of the controller parameters is then applied to a 3D EVC system model for simulation and closed-loop testing experiments. The results indicate that a good agreement between the ideal curve and the tracking signal curve verifies the optimality of the controller parameters. Finally, under certain cutting conditions, the workpieces of three different materials are cut with two different cutting methods. The study revealed that the surface roughness value is reduced by 20 %–32 %, which further verifies the effectiveness of the optimal controller's parameters.

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A novel design method for 3D elliptical vibration-assisted cutting mechanism

Cited by 16 publications

References 23 publications

Research on Bandwidth Improvement of Fine Tracking Control System in Space Laser Communication

Research on Bandwidth Improvement of Fine Tracking Control System in Space Laser Communication

Mechanics of AlCuNiTi alloy orthogonal micro-cutting

Parameter tuning of robust adaptive fuzzy controller for 3D elliptical vibration-assisted cutting

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