液压挖掘机自动控制系统的设计和实现

为了提高液压挖掘机操纵系统自动化程度，对WY1.5型液压挖掘机的液压系统进行电液比例控制改造，在不改变原手动操纵系统功能的基础上，增设一套自动操纵系统，基于移动车辆控制器编程实现对挖掘机的自动控制。对改造后的液压挖掘机自动控制操纵系统进行试验，结果表明改造后自动操纵系统能够完成手动操纵系统的全部控制功能，运行稳定。     

用于水果实时分级系统的同步跟踪自动控制装置

研究了一种用于计算机视觉水果自动分级系统的同步跟踪自动控制装置。图像处理结果从计算机并行口输出到移位寄存器，利用接近开关产生的脉冲作为寄存器的移位信号，将处理结果在移位寄存器输出端口的位置与水果的实时位置保持一致，实现对水果的同步跟踪，并利用硬件操作步进电机的脉冲分配和相关动作，从而完成对分级执行机构的正确控制。     

Integrating effects of hunting policy, catastrophic events, and inbreeding depression, in PVA simulation: the Scandinavian wolf population as an example

Focusing on the wolf Canis lupus in Scandinavia as an example, criteria are proposed and an analysis performed to assess the effect on extinction risk of various control policies, while accounting simultaneously for effects of inbreeding depression and potential catastrophic events. Each control policy is characterized by a hunting pressure (the increase caused by hunting of annual mortality rates) combined with a hunting threshold (the population size below which hunting is not permitted). Catastrophes are taken into account by including the persistence of a severe catastrophe in the criterion for population viability. Based on these criteria, the results suggest that only a very limited amount of hunting should be permitted at low population sizes. The results also illustrate the importance of including a long-term perspective in modelling threatened populations.     

粮仓窗户远程自动控制系统设计

设计出一种粮仓窗户远程自动控制系统。根据仓内外的温度和湿度变化,自动开启或关闭窗户及通风机械,实现粮仓的自动通风,自动控制。该系统可与粮情检测系统、通风控制系统等结合,组成粮仓自动化管理系统。     

Landscape irrigation scheduling efficiency and adequacy by various control technologies

Automated residential irrigation systems tend to result in higher water use than non-automated systems. Increasing the scheduling efficiency of an automated irrigation system provides the opportunity to conserve water resources while maintaining good landscape quality. Control technologies available for reducing over-irrigation include evapotranspiration (ET) based controllers, soil moisture sensor (SMS) controllers, and rain sensors (RS). The purpose of this research was to evaluate the capability of these control technologies to schedule irrigation compared to a soil water balance model based on the Irrigation Association (IA) Smart Water Application Technologies (SWAT) testing protocol. Irrigation adequacy and scheduling efficiency were calculated in 30-day running totals to determine the amount of over- or under-irrigation for each control technology based on the IA SWAT testing protocol. A time-based treatment with irrigation 2 days/week and no rain sensor (NRS) was established as a comparison. In general, the irrigation adequacy ratings (measure of under-irrigation) for the treatments were higher during the fall months of testing than the spring months due to lower ET resulting in lower irrigation demand. Scheduling efficiency values (measure of over-irrigation) decreased for all treatments when rainfall increased. During the rainy period of this testing, total rainfall was almost double reference evapotranspiration (ET_o) while in the remaining three testing periods the opposite was true. The 30-day irrigation adequacy values, considering all treatments, varied during the testing periods by 0-68 percentile points. Looking at only one 30-day testing period, as is done in the IA SWAT testing protocol, will not fully capture the performance of an irrigation controller. Scheduling efficiency alone was not a good indicator of controller performance. The amount of water applied and the timing of application were both important to maintaining acceptable turfgrass quality and receiving good irrigation adequacy and scheduling efficiency scores.     

汽车发电机定子铁芯卷叠生产线自动控制系统的研制

汽车发电机定子铁芯卷叠新工艺生产线自动控制系统由自行设计的专用微机和日本三菱F—60可编程序控制器组成。以 Z80 CPU 为核心的专用微机具有计数带料长度、厚度实时检测及根据带料厚度变化自动决定带料长度等功能。F—60可编程序控制器能完成从带料至加工成定子铁芯成品整个工艺过程的自动控制,实现了高速冲裁机、卷绕专机之间及其与其它各台专机之间的协调控制,系统自动化程度高,控制灵敏、可靠。     

模糊控制技术在太阳热水系统工程中的应用

介绍了太阳热水系统工程的基本组成及特点，详细阐述了采用PIC系列单片机和模糊逻辑控制算法实现水温恒定控制的基本原理、电路设计、精确量的模糊化、模糊控制规则以及测控软件的编制。     

基于不同模糊算子的模糊推理方法及效果分析

给出了基于不同模糊算子的模糊推理方法 ,简单地介绍了模糊控制器的基本结构 ,比较分析了基于不同模糊算子的模糊推理方法的推理结果和计算机控制仿真效果     

一种单稳型环形振荡器的提出及其应用

提出了单稳型环形振荡器的原理和电路,用Multisim8仿真软件进行了电路仿真,介绍了单稳型环形振荡器的应用,讨论了集成74121单稳态触发器定时元件RC对暂稳时间的影响。按照交通灯控制信号的要求,安装调试了单稳型环形振荡器及控制信号产生电路。     

油田污水处理自动加药控制器的设计

以油田污水处理站为背景,研究污水处理过程中PPM控制问题。通过对油田污水处理过程控制原理的阐述和对自动控制系统结构模型的深入剖析,结合系统控制策略,建立了PPM加药控制模型。在此基础上,论述了基于PI算法的控制器设计。仿真试验结果表明,PPM加药控制方法可以中和系统离子浓度的变化,达到跟踪误差小,调节时间短等性能指标。