Power bond graph is used to established the bond graph model of the lifting and dropping of hydraulic pile hammer and state space equation in the paper for hydraulic pile hammer is perplexing nonlinear system . in order to attain the graph that pressure , position , velocity , acceleration vary with time in the course of driving pile simulation procedure solving state space equation is designed on the basis of combining four - order runge - kutta method with predicator - corrector method , dynamic simulation of the hydraulic system is studied in matlab 6 . 5 . it is convenient to analyse dynamic characteristics of the hydraulic syste m , beneficial to the design and parameter optimization of the hydraulic system . in the final part of the paper , under detailed analysis of the control characteristics for double - acting hydraulic pile hammer with double cylinders , control system based on the programmable logic controllers founded on technology of modern compute is designed 由于液压打桩锤液压系统是一个复杂的非线性系统，本文采用功率键合图法建立液压打桩锤上行、下降的键合图模型和状态空间方程，通过四阶龙格?库塔法和预估?校正法相结合编制了仿真程序对状态空间方程求解，在matlab6 . 5中进行液压系统的动态仿真，获得液压打桩锤运动过程中压力、位移、速度、加速度等随时间变化的曲线图。此曲线图方便了对液压系统动态特性分析，为液压系统的设计和参数优化提供了有益的借鉴。最后，在深入分析双缸双作用液压打桩锤控制系统的功能要求后，采用了以现代计算机技术为基础的新型工业控制装置? plc可编程控制器，设计出了双缸双作用液压打桩锤的电器控制系统。
Series full - auto pipe expander with drawing device and program interface is used with extruding machine . it is also used solitarily , while expanding pipes , the machine adopts translation , the action is steady and corret , it does not damage pipe materical , the machine adoptes double - infrared heating oven type , each oven is equipped with heating cire , the shaping method adopts expanding - end shaping , the size of pipe mouth is correct . on its panel , there is a transfer swith of expanding solvent type pipe socket ( straigh port ) and expanding sealloop type pipe socket ( rport ) . the choice of expanding pipe type is very convenient , the technologocal adaptability is strong , its main electric control elements are all imported . the syetem charecteristics are steady and reliable 配有与主机配套的接料牵引装置和相应的程序接口，既能与挤管主机联线使用，又可以作单机使用；扩管时管材的移动均采用平移方式，动作平稳准确而且不易损伤管材；这种机型采用红外线加热方式且为双加热炉型，每个加热炉都配有中心加热炉芯；成型方式均采用扩管头定型方式，管口成型尺寸准确；该机型在控制面板上设有扩溶剂型承接口（直口）和扩弹性密封圈型承接口（ r口）的转换开关，扩管方式选择十分方便，工艺适应性强；主要的电器控制元件均采用进口元件，系统性能稳定可靠。
Yg832 electronic multifunctional stretcher , adopting ac servo system and exactitude screw arbor drive , has many characteristicses , such as reasonable structure , simple operation , low noise and smooth run etc , adopting scm control , displayed by lcd , intellective interface , deposit the data into the database if connected with the computer Yg832多功能拉伸仪，采用交流伺服驱动，滚珠丝杆传动，具有结构合理，操作简单，噪声低，运行平稳等特点，电器控制采用单片机控制，液晶中文显示，人机对话界面，与电脑连接可建立数据库。
This machine is adaptive to sticking labels on bottles of a long tube shape that cannot stand stably during liquor filling , such as small injection bottles , ampoules , and other medicine bottles , as well as batteries . the entire machine is of s304 stainless steel or oxidation p rocessed alloy aluminium , with all the main electric and control units of internationally famous brands , among which the driving system japanese import , and the photoelectric control system german import . all these factors mentioned above can ensure a stable and accurate label sticking operation 该设备适用站立不稳的长筒瓶贴标，如口服液瓶小注射瓶安培瓶电池针剂药品瓶等，整机为s304不锈钢与经氧化处理的铝合金制成。主要电器控制元件均是国际知名品牌，贴标头驱动系统为日本原装进口件光电控制系统为德国原装进口件，确保了贴标的准确性和稳定性。
By applying the micro - electronics , micro - controller and field bus technology into the renovation of low voltage switchgear , people can design the communication - capable low voltage switchgear . the new products can realize the intelligentization and function combination of the traditional low voltage switchgear . also you can realize the systematization and automation for the controlling of low voltage switchgear by using of the field - bus communication technique 将微电子、微处理器和现场总线技术应用于低压开关电器的改造中，所设计出的可通信低压开关电器，能实现传统低压电器元件功能的组合化和智能化，并能够通过总线通信技术的应用实现低压电器控制的系统化和自动化，它代表着21世纪低压电器的一个重要的发展方向。
Model ssj fourshuttled circular loom is specialized for manufacturing polypropylene cylindric sack , which covers little floor area and has the advanced electric control function . it is of high production efficiency , reasonable structure , little wear and tear , and longer usful life . the machine applies ac frequency - converter stepless speed regulating to lift electric machine , and shows the function of automatic halt when silk warp and weft are broken Ssj型四棱圆织机是生产聚丙型筒状编织袋的专用机，占地面积小，整机有先进的电器控制功能，生产效率高，结构合理，磨损小，寿命长，提升电机采用交流变频无极调速，并具有经、纬丝断丝后自动停机和显示功能。
Sgk - b250 plastic pipe belling machine attribute semiautomatic opportunities for the single - use . such models use infrared heating , molding method adopts expand the headers to finalize the design , orifice size precise shape . the control panel don ' t have the conversion switch to control over the type of solvent for expansion socket ( vertical ) and ring - for flexibility expansion socket ( r ) . expanding way is very easy choice and technics adaptability is strong , the main electrical control components are imported , system performance is stable and reliable B250塑料硬管扩口机，属半自动型作单机使用，扩管时管材由人工搬至扩管工位：这种机型采用红外线加热方式：成型方式均采用扩管头定型方式，管口成型尺寸准确：该机型在控制面板上没有扩溶剂型承插口(直口)和扩弹性密封圈型承插口( r口)的转换开关，扩管方式选择十分方便，工艺适应性强：主要的电器控制元件均采用进口元件，系统性能稳定可靠。
