面向固—液两相软性磨粒流的嵌入式实时测控系统研究

发布时间：2018-02-12 20:24

本文关键词： 固-液两相软性磨粒流实时框架有限状态机嵌入式Linux 小波包　出处：《浙江工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：目前,对于软性磨粒流抛光加工方法的研究工作,主要集中于理论分析与仿真研究。为了充分了解软性磨粒流的实际运行和加工状态下的情况,以及进一步探讨软性磨粒流的加工工艺方法,以适应不同加工条件和加工环境的需要。因此,研究面向固-液两相软性磨粒流的测控系统具有必要性,本文的主要工作如下: (1)研究并总结了固-液两相软性磨粒流的抛光影响因素,建立了软性磨粒抛光影响因素实体关系模型;应用磨削加工中的经验公式普林斯顿方程研究了磨粒浓度对抛光的影响。为设计面向固-液两相软性磨粒流的嵌入式实时测控提供所需的测量变量与控制变量。 (2)针对软性磨粒流的流道微小,无法在流道内部使用接触型传感器,采用二次信号-振动信号对软性磨粒流的加速度振动信号进行数字信号分析。通过小波包分析提出一种基于小波包的能量的特征信号为被控变量的测控方法。 (3)采用面向对象技术,从软性磨粒流测控系统的需求出发,结合有限状态机理论和嵌入式实时操作系统多线程并发模型,设计了面向软性磨粒流嵌入式实时测控系统软件的轻型框架,以此框架为复用基础扩展设计软性磨粒流的嵌入式实时测控系统。 (4)面向固-液两相软性磨粒流的嵌入式实时测控系统采用双核架构的实现方案,集合DSP的高速的实时数字信号处理能力和嵌入式Linux应用程序接口实现了面向固-液两相软性磨粒流的嵌入式实时测控系统。并对运行于DSP系统的软件采用单调速率调度算法对系统实时可调度性进行分析。分析结构显示系统满足实时性可调度。
[Abstract]:At present, the research work of soft abrasive flow polishing method is mainly focused on theoretical analysis and simulation. In order to meet the needs of different processing conditions and processing environments, it is necessary to study the measurement and control system for solid-liquid two-phase soft abrasive flow. The main work of this paper is as follows:. 1) the influence factors of solid-liquid two-phase soft abrasive flow are studied and summarized, and the solid relation model of soft abrasive polishing factors is established. The effect of abrasive concentration on polishing is studied by using the empirical formula Princeton equation in grinding process, which provides the necessary measurement and control variables for the design of embedded real-time measurement and control for solid-liquid two-phase soft abrasive flow. (2) the flow channels for soft abrasive flow are too small to use contact sensors within the runner, The acceleration vibration signal of soft abrasive flow is analyzed by using quadratic signal-vibration signal, and a method of measuring and controlling the characteristic signal of energy based on wavelet packet is proposed by wavelet packet analysis. In order to meet the requirement of soft abrasive flow measurement and control system, we adopt object oriented technology, combine finite state machine theory and multithread concurrent model of embedded real time operating system. A lightweight framework of embedded real-time measurement and control system software for soft abrasive flow is designed. Based on this framework, an embedded real-time measurement and control system for soft abrasive flow is designed. The embedded real-time measurement and control system for solid-liquid two-phase soft abrasive flow adopts a dual-core architecture. The high speed real time digital signal processing capability of DSP and the embedded Linux application program interface are used to realize the embedded real time measurement and control system for solid liquid two phase soft abrasive flow. The software running in DSP system is controlled by single speed. Rate scheduling algorithm is used to analyze the real-time schedulability of the system, and the analysis structure shows that the system meets the real-time schedulability.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TP273

【参考文献】