In this paper , the design of electric forklift driving controller is demonstrated . otherwise , can is added into this controller , so as to build up can networks with other modules equipped with can controllers . this paper is composed of 7 chapters : in the first chapter , the background of the paper is introduced ; in the second chapter , the structure of electric forklift is demonstrated ; in the third chapter , first the math model of series motor is found , then the motor is controlled as improved p1d control rule ; in the fourth chapter , the principle and realization method of forward and reverse rotation and back - feed brake are explained ; in the fifth chapter , the principle of can and design of application layer in can are illuminated ; in the sixth chapter , the principle of e2prom is clarified ; in the last chapter , summary of the whole paper is given , and prospect in this field is made 全文共分七章:第一章绪论,介绍了论文背景;第二章,系统综述,介绍了电动叉车的整车结构;第三章,串励电机的建模、改进的pid算法及其软硬件实现,首先根据串励电机的机电特性推导出数学模型,然后在此基础上结合pid控制规律对电机进行控制;第四章,串励电机的正反转及回馈制动,介绍了实现电机正反转及回馈制动的原理及方法;第五章, can网络实现模块间通讯,介绍了can总线原理及can总线应用层设计;第六章,用串行e ~ 2prom实现参数设定,介绍了串行e ~ 2prom的原理;结束语,对本论文进行了总结,并对该领域的发展进行了展望。
It also has a series of enhance functions such as : zero position automatic regulation , remote inspect the field control parameter and adjust control parameter pass number locked and so on . at the same time , it can carry though remote parameter enactment , remote control , self - diagnoses etc function by field bus hart protocal 除具有常规智能式的全部功能外,还具有一系列增强的功能,如零点自动调整,远程就地控制参数查看与调整控制参数密码锁定等。同时通过现场总线hart协议,进行远程参数设定远程控制自诊断等功能。
A practical approach has been brought forward that the priori information of signal and the external parameter do n ' t needed , on the basis of summarizing the methods of white noise elimination with wavelet and the different lipschtiz exponents and characters in time - scale plane of white noise and pd 本论文在总结各类小波去除局放信号中白噪方法的基础上,根据白噪和局放信号的不同李氏指数以及在时间一尺度平面上的不同特征,提出了一种不需信号的先验知识和外部参数设定的适合局部放电信号处理的实用方法。
It also has a series of enhance functions such as : zero position automatic regulation , remote inspect the field control parameter and adjust control parameter pass number locked and so on . at the same time , it can carry though remote parameter enactment , remote control , self - diagnoses etc function by field bus hart protocal 除具有常规智能式的全部功能外,还具有一系列增强的功能,如零点自动调整,远程就地控制参数查看与调整控制参数密码锁定等。同时通过现场总线hart协议,进行远程参数设定远程控制自诊断等功能。
For many years , the drying furnace has been adopted with sealed structure and electrical heated , dial instruments are used to control the temperature of the drying furnace and to keep it invariable . parameter setting is inputted by manual method , heating time is completely controlled by operators ’ experiences or their moods , meanwhile , its control function is singular , not only having no automatic heating time and insulating monitoring , having no drying process monitoring , but also having no function of automatic recording and report printing , the workers ’ labor intensity is bigger . thus two abnormal situations are always come forth , one is the insulating performance and intensity of works cannot be guaranteed reliably , it perhaps need to be dried repeatedly , the other is always to extend the drying time in order to ensure the drying quality 多年来干燥炉一直采用闷罐式结构和电加热方式,温度控制采用指针式温度控制仪表来实现炉温的恒定,其参数设定由人工输入,时间控制则完全凭操作者的经验、情绪来掌握,其控制功能单一,没有时间控制、绝缘自动监测功能,也没有干燥过程监视功能,更没有多要素记忆、打印存档功能,工人的劳动强度较大,所以就经常出现两种异常结果:一是工件的绝缘性能和强度得不到可靠保证,需要反复干燥;另一种是为保证干燥质量,往往要延长干燥时间。
This thesis tries to update the cmdsr system to achieve the characters below : real - time , better robust , higher recognition rate , non - special - man . considering the disadvantages of traditional improved spectrum subtraction speech enhancement , this thesis proposes the theory of fuzzy spectrum subtraction based on the fuzzy theory and improved spectrum subtraction speech enhancement ; as for the difficulties of detecting the endpoint of speech signal , the thesis gives the table of initial and the improved parameters , with which we can confirm the endpoints of mandarin digit speech ; the thesis puts forward two - level digit real - time speech recognition system , the first level is based on discrete hidden markov model which is linear predictive coding cepstrum ( lpcc ) and difference linear predictive coding cepstrum ( dlpcc ) , the second level is based on formant parameters ; as for the realization of hardware , the thesis depicts the realization of every part of cmdsr based on the tms320vc5402 in detail ; as for the development of software , the thesis gives the software design flow chart of cmdsr , simulates the basic theory with matlab language and gives the simulation results 针对传统的“改进谱相减法语音增强”参数设定单一、环境适应能力差的缺点,提出了一种利用模糊理论和“改进的谱相减法”结合的“模糊谱相减法语音增强” ;针对语音信号端点检测困难的特点,通过matlab仿真试验,给出了能够准确确定数码语音端点的初始和改进参数表;提出了利用基于线性预测编码倒谱参数和差分线性预测编码倒谱参数相结合的离散隐含马尔可夫模型进行第一级识别、利用共振峰参数进行第二级识别的两级汉语数码语音识别系统,在保证系统实时性的同时,实现连接汉语数码语音识别系统识别率的提高;在硬件实现上,详细阐述了基于tms320vc5402的连接汉语数码语音识别系统各部分硬件设计;在软件开发上,给出了连接汉语数码语音识别的软件设计各部分的流程图,并对各部分进行了matlab仿真,并给出了仿真结果。
It provides various kinds of function , such as flow chart , real time dynamic display , real time and historical trend chart , alarm , report , data logging , parameter setting etc . the function of flow calculation and compensation , data acquisition and storage , communication is also provided in flow calculator 计算机实现hmi人机接口和数据管理平台,具有工艺流程图、实时动态显示、实时和历史趋势图、报警、报表、数据记录、参数设定等功能。积算单元固化有流量计量专用软件和通讯软件,实现数据采集、计算、补偿、存储、通讯等功能。
Wide plus ak series intelligent pressure transmitter which is universal intelligent series transmitter , it introduced advanced production technology from america and japan adopts the world leading technique , pass through strict quality control . this kind of transmitter is searched and developed independently by our company that is pressure detect transmit unit in the industrial automation control system . it measures fluid pressure in the industry process and converts it into 420 ma dc signal output ; at the same time , it may be remote parameter setup , remote control , self - diagnosis by field hart protocol Wideplus - ak系列智能压力变送器是引进美国和日本的先进生产工艺,采用世界领先技术,经过严格的品质管理,由我公司自行研制和开发的通用智能型系列变送器,是工业自动化控制系统的压力检测变送单元,它测量工业过程流体压力,将其转化成4ma 20ma dc信号输出,同时通过现场hart协议可进行远程参数设定远程控制自诊断等功能。
In this paper , eliminating the periodic narrowband noise with wavelet packet has been put forward . the periodic narrowband noise eliminating method has been proposed that has the optimal wavelet packet base . the instances show that this approach can eliminate the periodic noise of pd signal , and its dose not need set the external parameters 通过分析周期性干扰和局部放电信号的小波包分解特性,采用了最优小波包基来剔除周期性干扰,实例证明能够很好的剔除局部放电信号中的周期性干扰,并且不需要外部参数设定。
The article in lead - zinc mineral tailing transmission pumps electric motors automatic control system of huang - shaping , for example , a detailed account of the system frequency conversion governor , ultrasound liquid position controller design models , debugging points and parameters set methods , and energy saving effect of a careful analysis 摘要文章以黄沙坪铅锌矿尾矿输送泵电动机自动控制系统为实例,详细介绍了系统中变频调速器、超声波液位控制器的设计选型、调试要点和参数设定方法,并对节能效果进行了认真分析。