Development of FPGA based NURBS interpolator and motion controller with multiprocessor technique

Zhao, Huan; Zhu, Limin; Xiong, Zhenhua; Ding, Han

doi:10.3901/cjme.2013.05.940

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…Table 1 shows the statistics of arithmetic operations for DeBoor-Cox algorithm. 18 With the DeBoor-Cox algorithm, NC system can implement interpolation process, including curve subdivision, arc-length calculation, and interpolation point generation. However, these operations require to call the DeBoor-Cox algorithm repeatedly, which causes redundant computation.…”

Section: Conversion From B-spline To Piecewise Power Basis Functionsmentioning

confidence: 99%

Research of the real-time interpolation based on piecewise power basis functions

Wang

Liu

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part B:

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With the outstanding geometric properties of B-spline, its recursive algorithm has been widely applied in numerical control systems to compute interpolation points and their derivatives. However, some of the B-spline basis functions in the recursive algorithm are computed repeatedly during the numerical control interpolation, which makes the interpolation efficiency greatly deteriorated. To deal with this issue, an effective approach by converting B-spline to piecewise power basis functions is proposed in this article. With the proposed power basis functions, formulas for computing interpolation point and its derivative can be established explicitly. Thus, the repeated computation due to the implicit expression can be avoided. To further improve the real-time interpolation performance, curve subdivision based on the proposed power basis functions is implemented simultaneously. Theoretical analysis shows that the computational complexity of the proposed method can be reduced by 71.1% compared with the DeBoor-Cox algorithm during the computation of interpolation points and their derivatives. Furthermore, the computational complexity of the curve subdivision can be reduced by 64.5%. Experimental results on a two-dimensional butterfly and a three-dimensional pigeon show that the proposed methods can greatly improve the computational efficiency.

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Section: Conversion From B-spline To Piecewise Power Basis Functionsmentioning

confidence: 99%

Research of the real-time interpolation based on piecewise power basis functions

Wang

Liu

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…With the development of hardware technology, the emergence of multi-core processor has greatly improved the performance of the processor and the PC based CNC system. Zhao et al [6] proposed a non-uniform rational B-spline (NURBS) interpolator and motion controller which adopts the embedded multiprocessor. Tavares et al [7] proposed a methodology for embedded hard real-time software synthesis with multiple operational modes based on a multiprocessor.…”

Section: Introductionmentioning

confidence: 99%

Architecture Modelling and Task Scheduling of an Integrated Parallel CNC System in Docker Containers Based on Colored Petri Nets

et al. 2019

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With the diversification of product types and the development of complex CNC system functions, reconfigurable, and extensible CNC system must be developed to meet the needs of industrial production in the new era. To optimize the original architecture between the CNC system and the machine tool, and to improve the integration level of the industrial control system, an integrated parallel CNC system which could control multiple CNC machine tools based on high performance multi-core processor is proposed in this paper. Based on the virtualize container technology, the functional modules of the CNC system, such as the interpreter module and interpolation module, operate separately on each Docker containers. The system scheduling module uniformly schedules above functional modules and caches the data generated by each module to maximize the processing efficiency and resource utilization. For the modeling of system architecture, the colored Petri nets are used to establish the models of CNC system and task scheduling. Two strategies of task scheduling which based on task dependencies and data flow are presented to determine the priority of system function threads. According to the developed test platform, the real time of the virtual system environment, real-time system environment, and the communication module of integrated CNC are analyzed. Furthermore, test results show that the proposed integrated parallel CNC system has the ability of centralized control of two machine tools synchronously. INDEX TERMS Integrated parallel CNC system, docker containers, colored Petri nets, architecture modelling, task scheduling.

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“…With the rapid development of computer and microelectronics techniques, the realization of embedded motion control systems with combination of DSP and FPGA becomes the mainstream for the design of open architecture motion controller based on computer platform [7]. The standard peripheral interfaces for computer equipments, which exchange data with controllers, can be divided into two categories.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of High-Speed Real-Time Communication Architecture for PC-Based Motion Control System

Wang

Liu

et al. 2014

Intelligent Robotics and Applications

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Abstract. To enhance the efficiency and stability of real-time data acquisition and transmission in motion control process, a high-speed realtime communication architecture based on FPGA and DSP is developed in this paper. The direct-memory-access (DMA) control module initiates DMA transfers over the peripheral-component-interconnect (PCI) bus. After that, two first-in-first-out (FIFO) buffers work as caches and convert data widths between the PCI bus and the local bus. Consequently, the data caches can be accessed by DSP over the local bus under DMA mode. The size of data transferred each time is able to be adjusted according to the application requirements. Experiments are carried out to demonstrate that the proposed communication architecture is capable of achieving high speed and stability in data communication with low consumption of compute resources.

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Development of FPGA based NURBS interpolator and motion controller with multiprocessor technique

Cited by 6 publications

References 20 publications

Research of the real-time interpolation based on piecewise power basis functions

Research of the real-time interpolation based on piecewise power basis functions

Architecture Modelling and Task Scheduling of an Integrated Parallel CNC System in Docker Containers Based on Colored Petri Nets

Design and Implementation of High-Speed Real-Time Communication Architecture for PC-Based Motion Control System

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