动态载荷模拟可控加载与测试装置设计

针对目前国内普遍采用的加载装置只具备手动控制功能的问题,阐述了大功率设备驱动系统的动态载荷负载特性,提出了一套模拟可控加载与测试装置的整体设计方案。设计了基于磁粉离合器和永磁同步电机的机械加载装置、上位机控制界面、基于Freescale 56F8346 DSP的控制核心、基于电力电子技术的电机驱动装置、基于MAX1415的高精度电流采样、基于直流/直流转换电路的励磁电源以及基于霍尔传感器的励磁电源输出电流检测。最后开发了系统硬件和软件,并进行了实验测试。研究结果表明,所开发的装置实现了动态载荷的模拟加载及测控。该成果为大功率设备驱动系统的研究提供了一个软、硬件测试与性能分析的重要平台。

数字式可控加载装置的研究

在进行理论分析和系统仿真的基础上,设计了数字化可控加载装置,模拟了各种负载转矩、参数及负载变化对系统的影响,从而为拖动系统进行各种加载装置的性能研究提供了良好的平台,推进了高性能电机的发展和高性能拖动系统的研究。该装置具有动态响应快、稳态精度高、鲁棒性强、控制灵活等特点。最后,通过仿真及实验证明了可控加载装置理论的正确性及可行性。

可控加载装置的研究

介绍了可控加载装置的工作原理 ,利用异步电动机同轴连接直流电动机 ,通过控制直流电动机的电磁转矩改变异步电动机的负载 ,研究异步电动机的拖动性能。并介绍了加载装置的硬件实现和软件的基本结构。

一种可控式医疗设备提手加载试验装置的研制

本文详细介绍了一种可控式医疗设备提手加载试验装置的基本结构和工作流程。该装置主要由电控箱、触摸屏、伺服电机、滑轨、拉力传感器等构成,可规范医疗设备检测过程,提高医疗设备检测的准确性和效率。

Credibility and Security of Weighing System for Large Structure Object

The weighing system designed for large structure object is mainly composed of three parts. The part of hydraulic system is made up of hydraulic cylinders, high pressure hydraulic hoses and electric pumps; the part of computer controlling system comprises pressure sensors, displacement sensors, data acquisitions, RS 485 network and the computer controlling model; the part of loading system is composed of the fulcrum structure and the concrete girder. The measurement principle and composition of the weighing system are discussed in this paper. Credibility and security of the weighing system are fully considered during the design phase. The hydraulic system is controlled by pilot operated check valves in case of the sudden loss of system pressure. The states of all gauges and RS485 network are monitored by computer controlling system functioning in different modules. When the system is running incorrectly, it will be switched to manual mode and give alarm. The finite element method is employed to analyze fulcrum structure so that the system has enough intensity to be lifted. Hence the reliability of the whole system is enhanced.