共查询到20条相似文献,搜索用时 31 毫秒
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本文针对一种新型叶片式电液伺服马达,讨论了定子过渡曲线在提高马达性能中的作用和设计准则,并从改善曲线的力学特性和动态特性两方面着重探讨了高次曲线在提高马达性能方面所具有的优越性,试验结果证明了高次曲线有利于提高马达的性能。 相似文献
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非圆齿轮液压马达的输出转速及其运转过程中的平稳性对马达的性能有较大的影响,在对马达配流规律和轮系运动规律分析的基础上,以角排量的脉动率为衡量指标,分析了马达运转的平稳性;以缝隙流动为基础,建立了马达转速与输入流量间的计算式,为该类马达输出转速分析提供了理论基础。结果表明,为形成指定转速所需马达的输入流量并非等于理论流量,行星轮公转速度越大,内齿圈内外径比值越小,所需的实际流量越大。帕斯卡蜗线型马达的运转平稳性要优于高阶椭圆型。研究结果对这类马达的工程应用具有一定的参考价值。 相似文献
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本文介绍了一种新型仿真转台用叶片式无脉动连续回转电液伺服马达的工作原理,并详细地说明了该马牵提高超低速、高频响、宽调带、高精度等性能指标方面所具有的优势。 相似文献
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文章分析总结了PROFIBUS—DP总线从站设计中通信接口的设计方法,介绍了一种带PROFIBUS—DP总线接口的TLC532交流同步伺服电机单轴位置控制器的结构原理,设计了一种基于PROFIBUS—DP总线的交流伺服控制系统,并对控制器与PROFIBUS—DP总线进行通信的接口硬件电路和软件流程部分进行了设计,将PROFIBUS—DP总线应用在伺服电机的速度和位置控制系统中,改变了传统的控制方法,对柔性制造系统和工控自动化的发展有重要意义。 相似文献
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Wen-Hou Chu Pi-Cheng Tung 《International Journal of Machine Tools and Manufacture》2005,45(7-8):933-939
This paper describes the development of an automatic welding control system for alternating current shield metal arc welding. This method could replace manual operations which require a well-trained technician. We have derived a mathematical model of the welding control system and identified system parameters. An adaptive sliding mode controller, estimates the bound of uncertainties, and modulates the rate of the electrode feed mechanism that regulates the arc current. The electrode feed-rate mechanism with this controller is driven by an AC servomotor, which can compensate for both the molten part of the electrode and undesirable fluctuations in the arc length during the welding process. The method can be easily applied to any welding system in which the electrode is consumed during the welding process. By maintaining the magnitude of the arc current at the desired value and the stability of the arc length, excellent welding performance is obtained. The simulation and the experimental results both show that this automatic welding control system, based on the adaptive sliding mode controller, can perform effectively. 相似文献
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A genetic algorithm is used to search for the rhythmical control of eight joints in a quadruped robot. The search is used to find a fixed number of Fourier coefficients for each joint. Each set of coefficients is considered to be a controller for the robot, and it is evaluated using a simulator of the dynamics of the walking pattern generated by the controller. The fitness of a controller is higher if it generates more stable and faster walking. Effective controllers are further evaluated using a purpose-built robot that is physically modeled in the simulator. We present initial results from this simulation system, and show good correspondence between the simulator-generated dynamics and the movement of the robot under control of the same set of coefficients. The results presented here suggest that stable limit cycles may exist in the dynamics of quadruped walking. 相似文献
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交流伺服技术是研制开发各种先进机电一体化产品的关键性技术,针对伺服系统具有时变性、模型的不确定性等,提出采用基于遗传算法的PID自适应控制算法,实现控制器参数的在线自寻优。仿真结果表明,该控制算法具有很强的鲁棒性、抑制外界干扰性和良好的动态性能。 相似文献
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根据工程实际的需要,提出一种基于CAN总线的伺服电机正反转同步控制方案。即将一台正转交流伺服电机与一台反转交流伺服电机实现龙门同步控制,以此来实现单轴的运动。通过试制样机实现了系统的控制目的,并将同步控制误差范围控制在1 mm内,其运行结果达到设计要求。 相似文献
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The objective of this paper is to describe how to retrofit a traditional milling machine, which has the hand wheel-manipulated ladder lead screw transmission system, with a d.c. servo-drive system. In this research, a d.c. servomotor is used as the actuator instead of the hand wheel to operate a milling machine table. A PC/AT is used to handle the data acquisition and the control signal calculation for various types of motion condition. The control laws are designed and written as C language software programs. In order to reduce the cost of the approach given in this study, the new type of low-cost PWM motor driver, and position and velocity feedback circuits are all designed and implemented. Additionally, a classical PID control method with relay adjustment is used to design the controller for this converted system in order to verify the approach availability. Finally, the system output response and the controller performance are investigated based upon the experimental data of this milling machine system operating in different specified motion situations. 相似文献
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手轮脉冲驱动均匀化控制 总被引:2,自引:0,他引:2
本文分析了数控系统手轮驱动存在的问题,提出了全新的手脉冲驱动均匀化控制法,这种方法基于运动控制芯片MCX314的“固定脉冲驱动过程中脉冲数可改变”这一性能来实现,在手轮大倍率快速放心转时驱动脉冲序列保持均匀高速输出,脉冲不会丢失,实现加减速控制和驱动速度控制,克服步进电机失步问题,解决了目前手轮驱动存在的一系列关键问题。 相似文献