Variable-parameter-model-based iterative pre-compensation method of the tracking error

Zhang, Dailin; Chen, Huangchao; Wang, Zining; Zhao, Huan; Ding, Han

doi:10.1016/j.ymssp.2021.107687

Cited by 8 publications

(4 citation statements)

References 26 publications

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“…Generally, selecting conservative speed, acceleration and jerk parameters, which affect machining efficiency, is necessary to balance machining accuracy. Many scholars solve the problem from the perspectives of controller design [27], servo gain adjustment [28,29] or controller compensation to improve contour accuracy [30][31][32][33]. However, these methods should improve accuracy from the perspective of the controller itself.…”

Section: Introductionmentioning

confidence: 99%

Dynamic velocity planning method for parametric toolpath with mode-based tracking error control

Xiao,

Fang,

et al. 2023

Int J Adv Manuf Technol

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This paper presents a dynamic velocity planning method for tracking error prediction and control based on a theoretical model of a servo control system. A balance between machining efficiency and machining accuracy is achieved by the proposed approach compared with the traditional method of reducing kinematic constraints and sacrificing machining efficiency to improve machining accuracy. Firstly, this study introduces a timeoptimised algorithm based on velocity, acceleration and jerk and uses the pseudo-jump method to linearise nonlinear problems. Secondly, based on the three-loop model of PID servo control system commonly used in industry, a new tracking error prediction method based on kinematic parameters is proposed. A new feed rate planning control algorithm based on dynamic characteristics is proposed to realise the control of tracking error, considering the dynamic performance of the axis and based on the prediction results. Furthermore, because the speed control algorithm based on dynamic characteristics is not a linear constraint, this study proposes a method combining convex relaxation and pseudo jerk to linearise the nonlinear problem, effectively obtaining a near-optimal feed rate profile. Finally, on the basis of these research contributions, the experiments are compared with the traditional kinematics method. Results show that the new method has less tracking error and higher processing efficiency.

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Section: Introductionmentioning

confidence: 99%

Dynamic velocity planning method for parametric toolpath with mode-based tracking error control

Xiao,

Fang,

et al. 2023

Int J Adv Manuf Technol

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“…The spindle inertia significantly impacts the rapid acceleration and deceleration rotation process, affecting the operation equipment's dynamic performance. [5][6][7] As high-speed rotating equipment, the spindle inertia of the aero-engine will affect the dynamic performance of aircraft, such as attitude control, start and stop characteristics, acceleration, deceleration performance, and so on. As the core component of the aero-engine, the spindle inertia of assembly rotors will directly affect the performance of the aero-engine.…”

Section: Introductionmentioning

confidence: 99%

A novel assembly method of aero-engine rotors with minimized spindle inertia

Liu

Sun

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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Assembly is an essential part of aero-engine manufacturing, and the assembly quality will affect the engine’s stability and service life. Spindle inertia is an essential factor affecting aero-engine dynamic performance. Assembly can affect the spindle inertia of the aircraft engine, which in turn affects the dynamic performance of the engine. This paper proposes a transfer model of spindle inertia based on machining error transmission, studying the variation law of spindle inertia of multi-stage rotors under the influence of assembly, providing an optimized assembly method with minimized spindle inertia. The influence law of machining errors on spindle inertia is analyzed through the simulation and probability density method. The assembly results of the designed rotors verify the effectiveness of the inertia transfer and assembly model. The results show that the spindle inertia of multi-stage rotors is affected by machining errors, and the spindle inertia can be adjusted by changing the assembly methods. This paper provides a new idea for the transmission and adjustment of spindle inertia of assembly rotors.

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Section: Introductionmentioning

confidence: 99%

Dynamic velocity planning method for parametric toolpath with mode-based tracking error control

Xiao¹,

Fang²,

Li³

et al. 2022

Preprint

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This paper presents a dynamic velocity planning method for tracking error prediction and control based on a theoretical model of a servo control system. A balance between machining efficiency and machining accuracy is achieved by the proposed approach compared with the traditional method of reducing kinematic constraints and sacrificing machining efficiency to improve machining accuracy. Firstly, this study introduces a time-optimised algorithm based on velocity, acceleration and jerk and uses the pseudo-jump method to linearise nonlinear problems. Secondly, based on the three-loop model of PID servo control system commonly used in industry, a new tracking error prediction method based on kinematic parameters is proposed. A new feed rate planning control algorithm based on dynamic characteristics is proposed to realise the control of tracking error, considering the dynamic performance of the axis and based on the prediction results. Furthermore, because the speed control algorithm based on dynamic characteristics is not a linear constraint, this study proposes a method combining convex relaxation and pseudo jerk to linearise the nonlinear problem, effectively obtaining a near-optimal feed rate profile. Finally, on the basis of these research contributions, the experiments are compared with the traditional kinematics method. Results show that the new method has less tracking error and higher processing efficiency.

show abstract

Variable-parameter-model-based iterative pre-compensation method of the tracking error

Cited by 8 publications

References 26 publications

Dynamic velocity planning method for parametric toolpath with mode-based tracking error control

Dynamic velocity planning method for parametric toolpath with mode-based tracking error control

A novel assembly method of aero-engine rotors with minimized spindle inertia

Dynamic velocity planning method for parametric toolpath with mode-based tracking error control

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