基于SAP的采购系统设计

本文以项目软件工程过程为基础,对系统进行调研,针对用户需求进行业务蓝图设计与系统分析,并依据设计理念进行系统测试与实现,进行项目实施及后续支持描述与优化.建立一个以加快响应速度、降低采购成本、提高经济效益为主要目的,基于SAP物料管理为主要内容的易于维护的采购平台.     

A Study on PC/104 Embedded Automatic Balancing Control System

In this paper,an embedded real-time control system for automatic rotor balancing was studied.Benefiting from the modular design,this system can be easily reconstituted or expanded under different working conditions.The special designed hardware resists harsh environment.As an embedded application,it was very important to save system consumptions on both hardware and software,so the algorithms for unbalance vibration identification and attenuation were deduced,meantime a unified fast algorithm structure was achieved through the geometric analysis.Based on this structure,the signal processing algorithm was tested by an open data source,while the control algorithm was simulated using a basic rotor model,and then connected to a hyper gravity machine running online auto-balancing.The result confirms that the unbalancing vibration is effectively restrained.     

A Simulation Study of Higee Rotor Auto-balancing Based on Iterative Learning Control

Hypergravity technology has a wide application prospect on many industry areas for its powerful ability on muitiphase flow transport and reaction.In its long-term operation,vibration control of higee rotor is an important guarantee for high-quality continuous outputs.Offline approach has great influence on continuity of the whole production line.In order to study online auto-balancing control strategy,a mathematical model of higee rotor was established.Then basic Iterative Learning Control(ILC)algorithm and its improved structure based on vector analysis were introduced.Pure injection balancer and electromagnetic balancer were separately used as the actuator.Three different control algorithnts(P control using Cohen-Coon parameter tuning law,basic ILC,and improved ILC based on vector analysis)were compared under single eccentric mass disturbance and continuous ones.Simulation results manifested the effects of ILC in rotor auto-balancing control,especially on the"over-control"issue during the balancing process.     

基于SAP的采购系统设计

本文以项目软件工程过程为基础,对系统进行调研,针对用户需求进行业务蓝图设计与系统分析,并依据设计理念进行系统测试与实现,进行项目实施及后续支持描述与优化。建立一个以加快响应速度、降低采购成本、提高经济效益为主要目的,基于SAP物料管理为主要内容的易于维护的采购平台。     

用于转子自动平衡的双盘电磁型平衡头移动控制方法研究

电磁型自动平衡系统通过在线辨识转子系统不平衡量,计算并控制平衡盘移动至最佳平衡位置,从而减小或消除原系统的振动。但该技术的工业化应用受到移动控制过渡时间长且可能令系统瞬时振动增强的限制,实例罕见。针对其在移动控制上的不足,采用系统仿真方法研究了可相对转轴正反两个方向任意转动的双平衡盘移动控制策略,并对两类特殊情况给出了解决措施。实验表明使用该控制策略平衡头移动迅速准确,缩短了动平衡时间,规避了系统瞬时振动增强的可能。