基于SIMULINK的自动控制系统的仿真实验研究

针对自动控制系统的设计很大程度上还依赖于实际系统的反复实验、调整的普遍现象，结合具体的设计实例。介绍了利用较先进的MATLAB软件中的SIMULINK仿真工具和模糊控制工具箱来实现对自动控制系统建模、分析与设计、仿真的方法。它能够直观、快速地分析系统的动态性能和稳态性能，并且能够灵活地改变系统的结构和参数，通过快速、直观的仿真达到系统的优化设计。     

PLC和变频器在锅炉供暖控制系统中的应用

介绍了PLC和变频器在锅炉供暖控制系统中的应用,分析了传统供暖系统运行过程中存在的问题,针对这一问题运用PLC和变频技术对此系统进行了改进.讨论了控制系统的结构组成、工作原理、运行方式、硬件与软件设计,其中硬件设计包括PLC、变频器、传感器等,软件设计包括确定I/O点数、I/O口分配、系统控制电路图及程序流程等.新系统较好地解决了供暖系统存在的能耗大、稳定性差、劳动强度大和自动化不高等问题,提高了系统运行稳定性、可靠性、灵活性和供暖质量,节能效果明显,具有应用推广价值.     

Equilibrating Pressure with Auto-Control Valve in Water Distribution Networks

This paper probes into the feasibility of equilibrating pressure of water distribution network through using auto-control valves in theory and in the economy. An optimal valve control model is designed to minimize the sum of squares of residual pressure in the network. Such an analog simulation has been performed on the year 2003 programming network of a certain littoral district in North China, through which this paper confirms that it is feasible to equilibrate pressure with auto-control valves in theory. The research work has brought about a discovery of applicable conditions of valves in economic feasibility, which avoids a great economic loss due to the wild use of auto-control valve. In addition, simulated annealing algorithm is applied to optimize valve settings and shown to identify global optimum or near-optimum.     

油库仿真教学培训系统的研发

经过充分调研,根据我国大多数油库的特点设计了典型的油库模型,开发成功了油库仿真教学培训系统,为学生提供了一个接近于现场更有利于教学培训的平台。     

PLC变频器在高速分散机中的应用

本文针对中山涂料厂的高速分散机工作时,主机经常出现过载,依靠人工复位反复启动运转,造成分散稀释不均匀,质量不稳定。为提高生产效益,保证涂料质量。分析了如何使用PLC与变频器对高速分散机进行改造后,一次循环分散就可以达到均匀稳定的质量。     

滑动运动副接触刚度控制研究

设计并制造了基于NiTi形状记忆合金驱动的间隙可调整（或接触刚度可控）运动副．实验结果表明：这种运动幅间隙可控性好，其接触动刚度变化范围大（最大动刚度是原始动刚度的11倍），具有理想的自适应抗振特性．     

Improved Water Network Macroscopic Model Utilising Auto-Control Adjusting Valve by PLS

In order to overcome the low precision and weak applicability problems of the current municipal water network state simulation model, the water network structure is studied. Since the telemetry system has been applied increasingly in the water network, and in order to reflect the network operational condition more accurately, a new water network macroscopic model is developed by taking the auto-control adjusting valve opening state into consideration. Then for highly correlated or collinear independent variables in the model, the partial least squares （PLS） regression method provides a model solution which can distinguish between the system information and the noisy data. Finally. a hypothetical water network is introduced for validating the model. The simulation results show that the relative error is less than 5.2%. indicating that the model is efficient and feasible, and has better generalization performance.     

PLC和上位机在污水处理控制系统中的应用

结合苏州高新区第二污水处理厂的工艺特点,介绍了控制系统的构成和控制方式,并对由PLC、控制站和上位机组成的控制系统的主要功能进行了叙述。该系统实现了污水处理全过程的实时监测和控制。     

PMSM控制系统中SVPWM与SPWM的比较研究

对PMSM控制系统采用SVPWM和SPWM两种调制方法的性能进行对比,SVPWM方案较SPWM方案,不仅提高了逆变器的直流电压利用率,且减小了转矩脉动.     

基于MATLAB/SIUMLINK的压力自动调节系统的研究

试验产品进口压力的控制精度必须稳定、不振荡、不超调、连续可控,采用常规PID控制器的微分作用可以进行超前控制而减少控制系统的超调,提高控制系统的稳定性.但在实际中,对具有非线性、时变不确定等特性的系统控制常规微分作用往往不能发挥应有的作用.微分先行PID是理想型PID改进中的一种,它适合于给定值频繁变化的情况,将微分先行PID控制器运用于压力自动调节系统,并在仿真平台MATLAB的仿真环境SIMULINK下进行了仿真.仿真结果证实,微分先行PID控制器缩短了滞后时间,减小了超调量,其控制性能和动态特性均能获得较好的效果.