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本文论述了基于微机的齿轮传动系统复合测试站,包括测量原理、两级并行处理系统结构和软件结构等。初级变换网络实现多参数同时获取,宏流水线系统实现实时处理,双口存储器和信号灯逻辑实现环形滑动窗控制异构处理机间的数据流量,并达到任务级同步。该两级并行处理结构提高了测试站的性能。 相似文献
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计算机数控系统的并行处理 总被引:1,自引:0,他引:1
为了系统地提高分布式多处理器数控系统的实时处理性能,从系统角度研究了数控系统核心任务的并行处理.设计了基于缓冲区队列同步的管道流并行处理和基于栅栏消息传递的主从站之间的同步算法,建立了并行处理的评价模型,并进行了实例说明与评价分析.通过模型分析,给出了影响系统并行处理性能的几个主要因素.结果表明,数控系统中采用并行处理,并在系统设计时通过模型进行系统评价和分析,能够为系统的设计和优化提供参考,达到提高分布式多处理器数控系统实时处理性能的目的. 相似文献
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本文论述了基于微机的齿轮传动系统复合测试站,包括测量原理、两级并行处理系统结构和软件结构等。初级变换网络实现多参数同时获取,宏流水线系统实现实时处理,双口存储器和信号灯逻辑实现环形滑动窗控制异构处理机间的数据流量,并达到任务级同步。该两级并行处理结构提高了测试站的性能。 相似文献
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针对目前检测仪器灵敏度低、实时性较差等问题,设计了以FPGA为核心的高精度QCM检测系统。并行处理、预测技术和FPGA可重构功能相结合,加快了数据处理速度,提升了硬件集成度,抑制了噪声干扰,提高了检测分辨率。为验证系统性能,在阻尼介质中进行了测试。结果表明,与QCM传感器一起配合,该系统完全满足高精度、实时测量的要求。 相似文献
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在装备测试领域,均需要对产品功能、性能进行测试,传统测试中,一般使用万用表、示波器进行简单的测试,难于胜任复杂的、长时间、重复性的测试场景,本文选取了基于Etest软件测试开发环境平台进行了系统集成测试系统的构建,验证了其与常见的测试变量的采集、处理、显示等关键技术问题。 相似文献
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为了对阀门电动装置的质量参数进行检测,设计了基于ARM的阀门电动装置测试系统,可对电动装置的转矩、行程、转速等性能参数进行精确检测。对测试系统的硬件结构与软件功能进行了研究。该测试系统已在实际测试过程中得到应用,经过实际运行,证明该系统性能稳定,达到了预期的效果。 相似文献
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Computational model for the control, performance evaluation, and calibration of a parallel mechanism
Ana Cristina Majarena Jorge Santolaria David Samper Juan José Aguilar 《The International Journal of Advanced Manufacturing Technology》2013,69(9-12):1971-1979
This paper presents a computational model that defines a methodology for the control, performance evaluation, and calibration of a parallel mechanism by means of the kinematic model, the kinematic parameter identification, and the control of the system actuators and sensors. The developed software has special relevance to the calibration of parallel mechanisms, allowing us to perform the system control, performance evaluation, and mechanism calibration in a single application. Parallel computing techniques are used to overcome the high computational cost involved with solving complex nonlinear kinematic models and parameter identification, obtaining a significant computational cost saving. Finally, the developed procedure is validated, obtaining an important improvement in the accuracy of the mechanism. This methodology can be used in mechanisms for metrology applications and machine tool processes. 相似文献
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M. D. Khomenko A. V. Dubrov F. Kh. Mirzade 《Optoelectronics, Instrumentation and Data Processing》2016,52(6):621-629
The development of additive technologies and their application in industry is associated with the possibility of predicting the final properties of a crystallized added material. This paper describes the problem characterized by a dynamic and spatially nonuniform computational complexity, which, in the case of uniform decomposition of a computational domain, leads to an unbalanced load on computational cores. The strategy of partitioning of the computational domain is used, which minimizes the CPU time losses in the serial computations of the additive technological process. The chosen strategy is optimal from the standpoint of a priori unknown dynamic computational load distribution. The scaling of the computational problem on the cluster of the Institute on Laser and Information Technologies (RAS) that uses the InfiniBand interconnect is determined. The use of the parallel code with optimal decomposition made it possible to significantly reduce the computational time (down to several hours), which is important in the context of development of the software package for support of engineering activity in the field of additive technology. 相似文献
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Recent advancements in simulation software and computation hardware make it realizable to simulate complex dynamic systems comprised of multiple submodels developed in different modeling languages. The so-called co-simulation enables one to study various aspects of a complex dynamic system with heterogeneous submodels in a cost-effective manner. Among several different model configurations for co-simulation, synchronized parallel configuration is regarded to expedite the simulation process by simulating multiple submodels concurrently on a multicore processor. In this paper, computational accuracies as well as computation time are studied for three different co-simulation frameworks: integrated, serial, and parallel. For this purpose, analytical evaluations of the three different methods are made using the explicit Euler method and then they are applied to two-DOF mass-spring systems. The results show that while the parallel simulation configuration produces the same accurate results as the integrated configuration, results of the serial configuration show a slight deviation. It is also shown that the computation time can be reduced by running simulation in the parallel configuration. Therefore, it can be concluded that the synchronized parallel simulation methodology is the best for both simulation accuracy and timeefficiency. 相似文献
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代谢组学是继基因组学和蛋白质组学之后生命科学研究领域一个新的分支,液相色谱-质谱(LC/MS)联用技术是代谢组学研究过程中广泛使用的一种代谢物检测方法。为快速处理LC/MS联用仪在检测过程中产生的大量原始数据,本研究将原始数据分组后由不同的计算节点完成预处理工作,提出了基于数据并行的预处理方法;为提高并行效率,提出了谱峰预识别算法。实验表明:27个小鼠血清样本原始数据在5个计算节点上分组并行处理,按照保留时间平均划分的加速比为2.87,按照谱峰平均划分的加速比为4.55;经大量数据和更多计算节点测试,数据并行处理方法比单计算节点串行处理方法的速度有很大提高,谱峰并行模式加速比Sp趋近于理想加速比P。该方法能够快速、准确地处理代谢组学研究过程中产生的海量数据。 相似文献
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A new screw theory method for the estimation of position accuracy in spatial parallel manipulators with revolute joint clearances 总被引:1,自引:0,他引:1
A. Frisoli M. Solazzi D. Pellegrinetti M. Bergamasco 《Mechanism and Machine Theory》2011,46(12):1929-1949
This paper presents a novel method based on screw theory for the analysis of position accuracy in spatial parallel manipulators with revolute joint clearances. The method is general, and can tackle with an arbitrary pose error function, expressed as a quadratic function of the end-effector displacement.The method performs a maximization of the pose error function, based on a 2-step computational procedure. The first computational step is analytical and leads to a sub-optimal estimate of the maximum pose error. This analytical solution represents the exact maximum pose error for the calculus of the angular accuracy in the special case of fully translational parallel mechanisms. The second computational step is numerical, and starting from the previous solution, can converge to the exact maximum pose error in a limited number of iterations.The relevance of the method is demonstrated through some application examples, where the worst-case angular and linear position accuracy in translating fully parallel manipulators is determined. As a further contribution, this paper shows how the position accuracy due to joint clearances in parallel manipulators is strictly dependent of the mechanism pose and its association to kinematic isotropy. 相似文献
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以先进制造中的机器人工作平台为应用背景,研究一种具有四个自由度的新型并联机器人机构。对这种机构的结构作了简要介绍,运用虚拟样机技术,在SolidWorks软件平台上构建该并联机器人机构模型。按照机构的结构几何尺寸,利用SolidWorks创建零件并进行虚拟样机装配,直接在运动仿真模块COSMOSMotion中,通过设定原动件运动参数进行运动仿真,并对仿真结果进行分析。分析结果证明完全可以运用SolidWorks软件完成并联机构的虚拟样机三维实体建模和运动特性分析,为并联机构的实际样机的试制奠定了基础。 相似文献
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针对6—3型Stewart平台并联机构运动学正解的问题,提出了一种新型的快速数值解法,该数值法能得到一个精确的惟一解。该方法主要是利用了6—3型Stewart平台的运动学反解的一些特性,得到一个有关杆长的微变量与动平台的微变量之间的线性方程式。再通过叠加杆长的连续的微小变量,得到6—3型Stewart平台的运动学正解。最后以反解为已知条件,通过算例进行了验证。同时采用Mathematica符号软件来提高求解位姿的计算效率。 相似文献