基于PIC单片机的螺旋轮式驱动管道检测机器人控制系统设计

设计开发了一台小型螺旋轮式驱动管道检测机器人。采用以PIC单片机作为系统的核心控制器,数字式PWM作为电机驱动控制方式,车轮旋转速度作为反馈量的全闭环伺服控制系统。并利用C#语言开发出一套上位机控制软件,通过Wifi无线通信的方式实现对管道机器人的远程遥控。为了提高控制系统的精度和性能,采用了模糊自适应PID控制算法。在实验平台上的运行表明:该机器人具有很好的稳定性和可控性。     

一种硫化机的无传感器伺服驱动系统

正本发明提供一种硫化机的无传感器伺服驱动系统,由硫化机控制器、伺服驱动器、伺服电机、油泵、油缸、比例压力阀、换向阀、溢流阀、油箱组成,伺服驱动器输出接口与比例压力阀电连接,硫化机控制器的流量信号与伺服驱动器电连接,硫化机控制器的油压信号与伺服驱动器电连接,伺服驱动器内置信号比较器,信号比较器的信号比较对象     

新型伺服驱动控制系统在全钢载重子午线轮胎两鼓成型机上的应用

介绍新型伺服驱动控制系统在全钢载重子午线轮胎两鼓成型机上的应用。新型伺服驱动控制系统的控制器和伺服轴模块在伺服运动控制方面具有优良特性,通过伺服驱动系统的速度与位置控制,完成轮胎成型过程的各个精准动作要求,实现轮胎成型;同时利用组态软件实现人机交互操作、过程参数修改和实时状态的监控和诊断,提高设备的自动化程度。     

基于80 C196KC单片机的Smith伺服控制器

讨论全数字伺服系统中的时间滞后，通过Smith预估控制器补偿系统中的时间滞后，提出一种应用80C196KC单片机的宽范围、高精度调速的控制方案及算法。对于非滞后系统采用Smith伺服控制器，可以简化系统、提高性能指标。     

电液伺服纠偏系统在输送带生产中的应用

介绍电液伺服纠偏系统在输送带生产中的应用，详细说明该系统的组成、工作过程及相关参数设计。该系统由光电传感器、位移传感器、电液伺服阀、液压缸和纠偏辊等装置组成。当涂胶过程帆布出现跑偏时，跑偏信号通过电液伺服控制器放大后驱动电液伺服阀，控制纠偏辊移位，从而对跑偏帆布实施纠偏。     

PROFIBUS现场总线智能化DP从站的设计

针对PROFIBUS现场总线的特点 ,介绍利用 80 3 2单片机与ASIC芯片SPC3控制器设计智能化DP从站的方法 ,具体讨论该从站的结构和硬件组成、智能PID控制算法 ,说明这是一种先进的设计方法     

电液混合型注塑机用的数字化伺服控制系统

本实用新型公开了一种电液混合型注塑机用的数字化伺服控制系统。该控制系统包括注塑机电脑控制器、油泵马达、油泵马达用伺服控制器、预塑马达及预塑马达用伺服控制器。油泵马达用伺服控制器接有马达启动信号线，注塑机电脑控制器与油泵马达用伺服控制器接有预塑状态信号线和流量指令信号线。     

全电动注塑机自动控制理论研究

研究了注塑机锁模机构伺服驱动器的技术,提出了一种基于DSP的全电动注塑机运动伺服控制器的设计思路。针对注塑工艺设计伺服电机控制器具有功能简化、成本降低等优点。本文通过对合模机构的伺服运动控制的研究,可以起到举一反三的效果,把伺服控制器的设计思想推广到射胶、熔胶等机构。伺服控制器的研究主要是针对交流永磁同步电机,也研究了廉价的无刷直流电机在全电动注塑机上的应用。     

节能型高效伺服注塑机设计

根据传统注塑机的特点,开发了节能型高效伺服注塑机,该机采用以交流永磁伺服同步电机为动力源的电液混合式驱动系统,采用交流同步伺服控制器和永磁式同步伺服马达作为控制主核心的控制系统。通过能耗对比实验表明,电机完全根据实际工况进行自动调速,大大降低了辅助工段的能量损耗,节能效果高达50％-60％。空载和满载（14MPa）响应时间小于180ms,生产效率提高20％以上。     

塑料部件精密热焊接机

美国Sonitek公司最近向市场推出了全电动热焊接塑件装置系统,其商品名为Servostaker电热焊机,装配有伺服驱动电机、数字处理控制器,可根据各种应用场合精密热焊接热塑性塑料件。     

Neural network model-based predictive control of liquid-liquid extraction contactors

The inherent complex nonlinear dynamic characteristics and time varying transients of the liquid-liquid extraction process draw the attention to the application of nonlinear control techniques. In this work, neural network-based control algorithms were applied to control the product compositions of a Scheibel agitated extractor of type I. Model predictive control algorithm was implemented to control the extractor. The extractor hydrodynamics and mass transfer behavior were modeled using the non-equilibrium backflow mixing cell model. It was found that model predictive control is capable of solving the servo control problem efficiently with minimum controller moves. This study will be followed by more work concentrated on using different neural network-based control algorithms for the control of extraction contactors.     

现场总线技术在ZL26滤棒成型机中的应用

ZL26滤棒成型机总线系统使用Profibus-DP总线协议,将CPU315-2DP程序控制器、AMK伺服控制系统、OPC触摸屏、IPC工控机、阀岛、模拟量输入输出组成一个通信及控制的系统。从系统的组成、硬件组态、运行原理方面进行分析阐述。     

Advanced process control for injection molding

This paper deals with the application of advanced control strategies to an injection molding process. Of particular interest is the control of one variable during the cooling phase of the molding process. Due to the cyclic dynamic nature of injection molding, the controlled variable must be regulated over a short cycle; the full process is completed within 10 seconds. Therefore, a key control objective is rapid setpoint regulation. A closed-loop strategy has been implemented for the regulation of pressure within the mold during the cooling cycle. First order plus dead time models of the process have been identified from plant step responses. The performance of several control algorithms for this process are compared in simulation studies. These algorithms have given comparable regulatory and servo responses. Finally, the effectiveness of the closed loop controi system has been demonstrated experimentally using the PI algorithm. Simulated and experimental results are in excellent agreement.     

Parameter adaptive control techniques for anaerobic digesters—real-life experiments

Different digital control schemes for anaerobic digesters of wastewater treatment plants are proposed. The process dynamics are briefly discussed and a simplified process model is adopted for the specific control purposes. By employing parameter adaptive control techniques, three nonlinear adaptive control algorithms are developed: substrate concentration control, methane production rate control and a strategy which is a combined method of the two previous control schemes. Extensive simulation results are presented. These algorithms are applied on a municipal wastewater treatment plant. The results obtained are discussed.     

ADAPTIVE CONTROL OF A HEAT EXCHANGER USING FUNCTION BLOCKS

Many adaptive control strategies require on-line identification, which implies that a digital computer is needed for implementation. The objective of the work presented in this paper is to demonstrate that adaptive process control can be accomplished by combining relatively simple digital control algorithms called function blocks. These function blocks are easily implemented in low-level microprocessor-based digital controllers without requiring a computer. The feasibility of these methods is illustrated through an industrial heat exchanger control example, and the performance benefits of this adaptive approach are illustrated by means of simulation results.     

ADAPTIVE CONTROL OF A HEAT EXCHANGER USING FUNCTION BLOCKS

Many adaptive control strategies require on-line identification, which implies that a digital computer is needed for implementation. The objective of the work presented in this paper is to demonstrate that adaptive process control can be accomplished by combining relatively simple digital control algorithms called function blocks. These function blocks are easily implemented in low-level microprocessor-based digital controllers without requiring a computer. The feasibility of these methods is illustrated through an industrial heat exchanger control example, and the performance benefits of this adaptive approach are illustrated by means of simulation results.     

基于AMESim和Matlab／Simulink的注塑机合模液压伺服系统的仿真研究

利用AMEsim和Matlab／simulink的各自特点,以电液伺服阀闭环PID控制的注射机合模液压系统为研究对象,建立了液压系统的动态模型。再利用遗传算法对PID控制参数进行了整定。同肘分析了开环比例控制和闭环比例控制的注射机合模液压系统。结果表明：PID闭环控制的注射机合模液压伺服系统具有较好的响应速度、稳定性与精度。     

ADAPTIVE POLE-PLACEMENT CONTROL OF A CONTINUOUS POLYMERIZATION REACTOR

A simulation of the polymerization of methylmethacrylate in a CSTR is adaptively controlled by two types of pole-placement algorithms. The strongly nonlinear polymerization process, exhibiting multiple steady states, presents difficult control problems for conventional feedback controllers. The performance of an adaptive explicit SISO controller and that of an adaptive implicit multivariable controller are compared and evaluated as applied to this process. The plant is identified by a recursive least squares estimator. Modifications made to the estimation algorithm help to maintain adequate closed-loop results. A simple warm-up procedure is introduced that successfully initializes the controller and estimator during plant start-up. Good servo and regulatory control are achieved by both pole-placement schemes.     

Neural‐Networks‐Based Feedback Linearization versus Model Predictive Control of Continuous Alcoholic Fermentation Process

In this work advanced nonlinear neural networks based control system design algorithms are adopted to control a mechanistic model for an ethanol fermentation process. The process model equations for such systems are highly nonlinear. A neural network strategy has been implemented in this work for capturing the dynamics of the mechanistic model for the fermentation process. The neural network achieved has been validated against the mechanistic model. Two neural network based nonlinear control strategies have also been adopted using the model identified. The performance of the feedback linearization technique was compared to neural network model predictive control in terms of stability and set point tracking capabilities. Under servo conditions, the feedback linearization algorithm gave comparable tracking and stability. The feedback linearization controller achieved the control target faster than the model predictive one but with vigorous and sudden controller moves.     

前馈伺服控制系统的仿真分析

针对小型伺服仍然存在对输入信号的跟踪和响应有延迟、有滞后等缺陷,在传统的比例微分积分即PID控制的基础上引入前馈控制,并对前馈控制不同的增益大小进行了仿真分析,最终验证伺服控制系统中引入前馈控制能够有效地改善控制系统的响应速度和跟随性能,但是前馈控制器的增益选择尤为重要,在增益合理的情况下,引入前馈控制能够改善系统性能,在一定程度上满足伺服系统高速高精度控制的需求。