Dynamic Modeling and Spectrum Analysis of Macro–Macro Dual Driven System

Yu, Hanwen; Feng, Xianying

doi:10.1115/1.4032245

Cited by 11 publications

(7 citation statements)

References 11 publications

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“…The foremost characteristic of the dual-driven micro-feed mechanism is its capability to demonstrate a stable velocity under a minimal speed difference, without being influenced by the nonlinear friction. Yu and Feng 22 studied the micro-feed feature of a dual-motor servo system by considering the impact of friction. This study focuses on the low-speed characteristics of the dual-driven ball screw mechanism, and it finds that the speed of the screw demonstrates a noticeable crawling phenomenon when the speed of the screw motor is 1 rad/s under the single-driven condition, according to the repeated simulated system parameters.…”

Section: Simulation and Analysismentioning

confidence: 99%

Kinematic analysis and simulation of a new type of differential micro-feed mechanism with friction

Feng

Sun

2019

Science Progress

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This article presents a new micro-feed mechanism, whose main transmission component is the nut–rotary ball screw pair. The screw and nut are driven by two motors, and they rotate in the same direction, with their movements enabling micro-feeding. The main contribution of the micro-feed mechanism is to avoid the inevitable low-speed nonlinear creeping phenomenon caused by the inherent properties of traditional electromechanical servo system structure, thus realizing high precision micro-feed. In this study, the motion state of the working ball is analyzed using the principle of differential geometry, the friction at the contact points is calculated, the balance equation for force and moment is established, the influences of the screw and nut on the kinematic parameters of the ball at different velocities and the differences in the motion states of the ball in different drive modes are studied, and the mechanical efficiency of the dual-driven ball screw mechanism is calculated. The potential applications of the new micro-feed mechanism and the results of numerical analysis can be applied to advanced technology fields such as robotics, suspensions, powertrain, national defense, integrated electronics, optoelectronics, medicine, and genetic engineering, so that the new system can have a lower stable speed limit and achieve precise micro-feed control.

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Section: Simulation and Analysismentioning

confidence: 99%

Kinematic analysis and simulation of a new type of differential micro-feed mechanism with friction

Feng

Sun

2019

Science Progress

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“…For the DDMS based on the hydrostatic screw nut pair, Su proposed a numerical model for the flow boundary for the hydrostatic screw [7], and Liu investigated the boundary slip characteristics within the hydrostatic screw under both DDMS and CFDS driving methods [8]. For the DDMS based on the ball screw nut pair, Yu performed a velocity spectrum analysis [9], Du proposed a full component friction identification model [10], and Wang investigated the effect of torque harmonics on the speed fluctuations of linear feed systems at low speeds; compared with CFDS, DDMS avoids the system resonance caused by torque harmonics at certain speed points [11]. These studies have demonstrated that the DDMS has better low-speed micro-feed performance than the conventional drive feeding system (CDFS).…”

Section: Introductionmentioning

confidence: 99%

Friction Parameters Dynamic Change and Compensation for a Novel Dual-Drive Micro-Feeding System

Feng

et al. 2022

Actuators

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This paper introduces a novel dual-drive micro-feeding system (DDMS) to obtain precise micro-feed synthetic motion by rotating both the screw and the nut, which eliminates the effects of nonlinear friction at low micro-feeding speeds and has good resistance to external disturbances. For the DDMS system, firstly, the frictional force of the screw–ball–nut contact surface is analyzed, and the dynamic system model based on the unique frictional coupling model is established for the DDMS. Secondly, a velocity squared term is added to the Stribeck model to characterize the influence of the frictional coupling on the system. The correctness of the modified model is verified through experiments and frictional parameters identification by combining with the genetic algorithm (GA). The dynamic trend of the frictional parameters with different speed combinations is studied, and the method of fitting parameters using the modified Stribeck model is proposed. Finally, the DDMS three closed-loop error compensation model and the proportional derivative position controller with the friction feedforward compensator are put forward to realize the accurate position-tracking function. Experiment results show that the method reduces the average tracking error by about 60% compared to the conventional PD controller.

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“…At present, the main method of research on ball screw feed system control technology is to establish a control model and analyze the system dynamic properties according to the model, and then design a controller to meet the control requirements according to the dynamic properties of the system. At present, the commonly used modeling methods include finite element method [2], lumped mass method [3] and hybrid modeling method [4].…”

Section: Introductionmentioning

confidence: 99%

Dynamic properties analysis of ball screw feed system based on improved hybrid model

Sun

Liu

2022

J. Phys.: Conf. Ser.

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Ball screws are widely used as feed systems for machine tools due to their high transmission efficiency and long service life. However, the large inertia force generated by the ball screw in high-speed motion will excite its flexible mode and cause system vibration. In the actual working condition, the dynamics of the system will also change with the nut position and workpiece mass. In order to further study the modeling method and dynamic properties of the ball screw feed system, this paper firstly improves the traditional hybrid model by introducing an energy loss factor to modify the hysteresis damping of the model. Further, the rationality of the improved model is verified by hammer test. Finally, the model was used to analyze the dynamic properties of the system and to obtain the influence law of workpiece mass and nut position on the system natural frequency.

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Dynamic Modeling and Spectrum Analysis of Macro–Macro Dual Driven System

Cited by 11 publications

References 11 publications

Kinematic analysis and simulation of a new type of differential micro-feed mechanism with friction

Kinematic analysis and simulation of a new type of differential micro-feed mechanism with friction

Friction Parameters Dynamic Change and Compensation for a Novel Dual-Drive Micro-Feeding System

Dynamic properties analysis of ball screw feed system based on improved hybrid model

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