共查询到19条相似文献,搜索用时 93 毫秒
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针对贴片机伺服系统数学模型未知,不能直接测量到频域性能的难题.架构基于贴片机的伺服辨识系统,其中包括激励信号的产生与加载、数据采集、控制对象辨识以及伺服系统控制性能分析等功能。使用伺服辨识系统可以辨识出伺服系统的数学模型,定量分析伺服系统的控制性能。同时,为直观调试伺服系统控制参数,应用先进伺服控制策略提供了条件;为提高贴片机的贴装效率和精度提供了有效研究手段。 相似文献
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为研制高频响、可记录数字伺服控制系统,以倍福的微型工控机和AD,DA模块为主要硬件,以TwinCAT为实时操作系统,以倍福的可编程控制器(PLC)为数字伺服控制编程语言,基于C#开发数字伺服控制系统界面。所设计的双路伺服控制系统具有良好的实时性、稳定性,数据更新周期为50 μs,输入输出延迟为150 μs,可不丢点记录各通道数据。内含扫频信号源,波形包括方波、三角波、正弦波,也可以用来测试系统频响。基于TwinCAT开发的数字伺服控制系统频响高,工作稳定,可用于各类液压伺服控制系统,也可用于系统特性测试。 相似文献
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介绍了数字伺服控制系统的误差源,对由其产生的误差进行了误差分析,并将该分析方法应用于某炮塔数字伺服控制系统,提出降低或削除误差的有效途径,为数字伺服控制系统的设计分析提供参考。 相似文献
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给出了一种基于DSP的舰载搜索雷达交流伺服控制系统的设计方法。采用高速数字信号处理芯片TMS320LF2407A作控制主体,交流变频器和交流无刷电机作驱动,采用先进的数字PID控制算法,组成全数字交流伺服系统,保证系统具有很高的精度、可靠的稳定性和良好的可扩展性。仿真试验表明该设计满足舰载雷达伺服控制系统的要求。 相似文献
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阐述了基于全数字伺服控制单元的位置控制系统的特点,并且对运动控制算法进行分析,介绍了欧姆龙公司最新推出的新型全数字交流伺服控制单元MCW151的原理和性能,阐述基于交流伺服控制单元MCW151的位置控制系统的特点,并且设计了一种新的高精度伺服控制系统。 相似文献
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基于正余弦编码器反馈处理的FPGA在伺服驱动中的应用 总被引:1,自引:0,他引:1
伺服驱动用于自动化系统、机器人、以及专用机器与机床的驱动系统等众多领域。这些要领域均对动力学、速度的稳定性和精度具有一定的要求,而满足这些要求时需要增加控制环的带宽。本文描述了一些基于FPGA的编码器方案以连接伺服驱动。由于数字滤波器在FPGA中的使用,位置信号的质量显著提高。用于伺服驱动后,这种较好的信噪比的信号可实现相对平滑(低噪)的电机电流,并可以提高控制环的增益。 相似文献
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为了提高舰载某型运动控制平台伺服控制系统的运行效率和响应能力,以计算机建模和虚拟样机技术为基础,应用ADAMS和Matlab/Simulink协同仿真技术,建立了三环永磁同步电机矢量控制模型,并设计了一种同步电机驱动下的三环伺服控制器。仿真结果表明,该三环伺服控制器能够有效提高系统的动态响应性能和跟随定位能力,并且满足工程控制的相应稳定性要求。 相似文献
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片式电子元件贴装设备是SMT行业的关键设备之一。介绍了片式电子元件贴装设备的工作原理、结构形式以及分类,分析了国内外贴片机的研究现状和虚拟样机在片式电子元件贴装设备开发的应用情况。 相似文献
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《Mechatronics》2020
Virtual process planning offers advantages in terms of predicting servo and contouring errors ahead of time, and taking corrective action by modifying the program or CNC parameters. Successful application of virtual process planning requires accurate models that capture the dynamics of feed drives. Identification of such models is typically time consuming.This paper presents a pole search method used in conjunction with least squares (LS) projection technique for identifying virtual machine tool drives. Compared to earlier research published in rapid identification, and the generic system identification method (i.e., a two-stage instrumental variable method), the parameter convergence has been improved significantly. This is achieved by reducing the number of unknown variables solved during LS estimation from eight to four (corresponding to each candidate pole triplet), and by avoiding the use of noisy position measurements and their time derivatives in the LS matrix pseudo-inversion. As a result, virtual feed drive models can be constructed using only in-process gathered data, without interrupting a machine tool's production for dedicated identification tests. Effectiveness of the new method is demonstrated in simulations and experimental case studies on two different machine tools, a gear grinding machine, and a 5-axis machining center. With the new method, servo errors can be predicted during the process planning stage to within 1-2% of closeness of their actual (experimental) values. 相似文献
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Luis Morales-Velazquez Rene de Jesus Romero-Troncoso Roque Alfredo Osornio-Rios Gilberto Herrera-Ruiz J. Jesus de Santiago-Perez 《Mechatronics》2010,20(2):265-272
The parameter identification process has an important role in servo systems tuning on computer numerical control (CNC) machine tools. The parameter identification is mostly done off-line due to the high computational load carried by the identification algorithms. In this work, we present a novel hardware architecture for an application specific processor implementing the recursive least-squares algorithm for the on-line identification. The developed processor is simulated and tested with the necessary elements to perform the CNC machine servo system control. The system was implemented in a low-cost FPGA, getting a maximum sample frequency of 40 kSps. 相似文献
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In order to alleviate the harm of co-location attack in cloud environment,a virtual machine placement strategy based on Shamir was proposed,and a virtual machine placement framework was designed.The security of key data was ensured by the blockchain in the proposed placement strategy.The virtual machine placement policy could effectively improve the security of the virtual machine and the load balancing capability of the cloud environment,and reduce resource waste.Finally,the effectiveness of the scheme is proved by simulation experiments. 相似文献
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驱动形式对贴片机动力学性能的影响 总被引:1,自引:1,他引:0
贴片机的驱动形式对贴片机的动力学性能影响很大。在新设计的贴片机结构基础上,分单驱与双驱两种情况,基于多体动力学原理建立了贴片机的虚拟样机模型,并就这两种情况进行了动力学仿真研究。结果表明,双驱结构贴片机相比单驱结构贴片机,所所需电机功率减小,受力状况明显好转。 相似文献
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This paper presents the design and control of a rotary dual-stage actuator (DSA) positioning system, which has a flexure-based beam driven by a voice coil motor (VCM) and a piezoelectric (PZT) actuator simultaneously. The design goal is to enable the two actuators complementary to each other for the combined ability of high positioning accuracy and a large tangential displacement range. To achieve a high tracking speed, the flexure beam is designed via finite element method (FEM) analysis to have sufficiently high open-loop bandwidth. System identification and measurements on the DSA prototype are also presented to verify the FEM analysis. Finally, the composite nonlinear control (CNC) method is applied to the DSA system. Experimental results demonstrate that the DSA servo system significantly outperforms the single-stage servo system in both step tracking and disturbance rejection. 相似文献