A Motion-Control Chip to Generate Velocity Profiles of Desired Characteristics

Cho, Jung Uk; Jeon, Jae Wook

doi:10.4218/etrij.05.0905.0030

Cited by 11 publications

(3 citation statements)

References 5 publications

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“…To make sure that a load can be moved to a specified position at a specified time along the infeed line, it is necessary to design the desired velocity profiles of the infeed's VCBs beforehand [1]- [9]. One of the most commonly used velocity profiles is that of a trapezoidal velocity profile [10]- [12].…”

Section: Introductionmentioning

confidence: 99%

Infeed Control Algorithm of Sorting System Using Modified Trapezoidal Velocity Profiles

Kim¹,

Choi²,

Jung³

2015

ETRI J

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This paper applies acceleration/deceleration control–based velocity profiles to an infeed control algorithm for a cross‐belt‐type sorting system to improve the accuracy and performance of the system's infeed. The velocity profiles are of a trapezoidal shape and often have to be modified to ensure that parcels correctly synchronize with their intended carriers. Under the proposed method, an infeed line can handle up to 5,600 items/h, which indicates a 40% increase in performance in comparison with its existing handling rate of 4,000 items/h. This improvement in performance may lead to a reduction in the number of infeed lines required in a sorting system. The proposed infeed control algorithm is applied to a cross‐belt‐type sorting system (model name: SCS 1500) manufactured by Vanderlande Industries.

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Section: Introductionmentioning

confidence: 99%

Infeed Control Algorithm of Sorting System Using Modified Trapezoidal Velocity Profiles

Kim¹,

Choi²,

Jung³

2015

ETRI J

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“…10 In order to enhance the capabilities and performance of sequential controllers, several parallel architectures have been proposed. Among them, field programmable gate array (FPGA) motion controllers are presented in some works for the design of smooth movements 11 and proportional-integral-derivative (PID) cores. 12 Also FPGA-DSP structures have been reported for numerical control 13 and the addition of MATLAB/Simulink developments.…”

Section: Introductionmentioning

confidence: 99%

A hardware–software system for coordinated multi-axis control based on a non uniform rational B-splines interpolator applied to industrial computer numerically controlled machines

Jaen-Cuéllar

Santiago-Perez

Romero-Troncoso

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part I:

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Motion controllers are widely used in many mechatronic applications such as computer numerically controlled machine tools and robots. These applications demand the use of high performance controllers. Some desirable characteristics in motion controllers are coordinated multi-axis control, smooth movements, and advanced interpolation methods. An important manufacturing aspect involves the production of a workpiece in a free form or using the parametric surfaces in modern computer aided design/computer aided manufacturing systems. The use of parametric curves and surfaces has become standard due to their ability to represent objects having complex surfaces with less data. Another mandatory characteristic of motion controllers is the real-time operation. The contribution of the present work is the design and implementation of a hardware-software system for multi-axis motion control featuring non uniform rational Bsplines interpolation. Advantages over other reported works are the hardware implementation which allows the application to real computer numerically controlled machines; also the parallel processing permits the incorporation of additional modules to form an integral system without dependence on external devices. Two experiments were carried out in a retrofitted-to-computer numeric control milling machine in order to show the efficiency of the developed system.

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“…In this algorithm, the calculation time can also be reduced and it is possible to generate any kind of velocity profile. This technique is built in several hardware circuits based on DSP and FPGA [8,9].…”

Section: Introductionmentioning

confidence: 99%

Application of Velocity Profile Generation and Closed-Loop Control in Step Motor Control System

Cho

Jeon

2006

2006 SICE-ICASE International Joint Conference

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Step motors are widely used in motion control systems. The step motor controller must perform high-precision positioning and smooth movement operation. In motion systems applying velocity profile control, the velocity of the motor gradually increases or decreases, to avoid the negative effect caused by the sudden change in velocity. Previous research proposes several step motor controller designs, that contain several modules, including a velocity profile generator, step motor driver, and feedback counter. These controllers are able to perform precise positioning and provide smooth motion operation. However, because these controllers operate in an open-loop control so the synchronous condition can be lost when disturbances in load torque exist. This paper presents the application of closed-loop control in the step motor controller. The control algorithm is based on two mode operations: open-loop and closed-loop. The controller operates in open-loop mode when it remains synchronized, and switches to closed-loop mode when it loses synchronization. This paper presents an algorithm for generating various velocity profiles and closed-loop control algorithms. The experiment is performed on a 16-b DSP, to verify the performance of the design. The experimental results show a velocity profile of unsymmetrical shape and demonstrate effective closed-loop control in an actual step motor system.

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A Motion-Control Chip to Generate Velocity Profiles of Desired Characteristics

Cited by 11 publications

References 5 publications

Infeed Control Algorithm of Sorting System Using Modified Trapezoidal Velocity Profiles

Infeed Control Algorithm of Sorting System Using Modified Trapezoidal Velocity Profiles

A hardware–software system for coordinated multi-axis control based on a non uniform rational B-splines interpolator applied to industrial computer numerically controlled machines

Application of Velocity Profile Generation and Closed-Loop Control in Step Motor Control System

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