摇臂探测车悬架多工况拓扑结构优化设计

为减轻探测车的悬架重量,保证足够大的刚度,基于变密度法对摇臂悬架进行了结构拓扑优化设计.对摇臂和摆杆的载荷工况和边界条件进行了简化,选取3种极限受载情况进行了准静力学分析,确定了优化时的各工况载荷.以最小柔度为目标函数,体积分数为约束条件,利用Hyperworks软件分别对摇臂和摆杆进行了多工况结构拓扑优化设计.依据体积分数为0.2的最优拓扑结构,并考虑探测车的几何通过性及悬架的工艺性要求,进行了摇臂和摆杆的结构设计.用MSC.Nastran软件对设计结果进行了有限元分析.结果表明,刚度和强度均满足设计要求,证明了悬架结构设计的合理性.     

新型刻度盘式自动归位钢筋弯曲机设计

钢筋弯曲机是建筑工地必不可少的机械,如何更有效提高机械生产效率,减少工人劳动强度,提高钢筋加工角度精度以及有更好的安全措施是钢筋制作中被普遍关注的问题.通过对国内现有钢筋弯曲机使用中发现的问题比较,设计了一款提高加工效率,减小劳动强度,提高加工精度,打弯钢筋后可以自动归位并带有平面刻度盘的新型钢筋弯曲机.     

自动弯曲机弯曲模的CAD和CAM系统

本文介绍自动弯曲机弯曲模的ＣＡＤ、ＣＡＭ系统。文中分析常规方法设计弯曲模所存在的困难，提出弯曲成形动态模拟的思想，建立弯曲成形的数学模型和力学模型，介绍成型模拟的计算方法。文中发展了设计及修改凸轮廓线的方法，从而保证凸轮廓线上各点的几何连续。研究两种干涉检查方法（图形显示法，计算法），为模具和凸轮的合理设计提供了有效的评价依据。     

齿轮传动的等弯曲强度优化设计

本文是在以前的基础上，进一步完成齿轮传动等弯曲强度表达式，并产其优化设计模型。借助已开发的优化程度，可进行齿轮传动等弯曲强度优化设计。     

为月球车低能耗越障的摇臂悬架参数多目标优化

为满足月球车能耗低、重量轻的使用要求,基于月球车的越障工况,以各驱动电机能量消耗为目标函数,对月球车的摇臂悬架参数进行了优化,并建立了摇臂悬架参数模型。分析了月球车越障通过性条件,建立了悬架参数多目标优化的数学模型。采用极大极小值法,将多目标函数统一成单目标函数,利用序列二次规划法(SQP)进行优化分析,得到了悬架参数的优化值。结果表明,越障时电机能量消耗明显降低。     

基于STC12C541OAD的新型摄像摇臂云台控制器设计

设计了一种新型7.5 m摄像摇臂控制器,该控制器以单片机STC12C5410AD为控制核心,采用了万向摇杆电位器、直流减速电机、电机驱动芯片LMD18200、电压转换芯片LM7525和蓄电池电量管理等模块电路,详细阐述了系统组成原理、软硬件设计.实验结果表明该系统控制器具有性能稳定、兼容性好和成本低等优点.     

摇臂钻床简易数控系统设计

针对管板工件孔数多、形状特殊,且同一工件批量生产的特点,提出了摇臂钻床点位控制的数控方案,通过微机对步进电机的控制,实现Ｘ轴、Ｙ轴的精确定位。采ＷＩＮＤＯＷＳ操作系统,使该系统具有方便的操作和存储功能     

摇臂钻床数控改造设计方案

通过对中、小型锅炉厂摇臂钻床进行数控改造,改善了锅炉集箱打孔、管板钻孔的加工工艺,降低了废品率,提高了产品质量,文中介绍了数控改造的设计主导思想及设计方案。     

基于Matlab的曲柄摇杆机构运动分析

为分析机构是否能够满足给定的运动规律和运动空间的要求,必须对机构的运动规律进行研究。运用Mat-lab强大的计算功能,对曲柄摇杆机构的运动规律进行了求解,并使其结果可视化,从而使机构的运动分析直观、简单和精确,提高了曲柄摇杆机构的设计精度和效率。     

遗传算法在曲柄摇杆机构优化设计中的应用

本文采用遗传算法 ,对曲柄摇杆机构再现已知运动规律问题进行了优化设计。文中对优化问题的数学模型和遗传算法在解决此问题时的计算过程进行了比较全面的描述。通过与传统的惩罚函数法在同一问题中应用结果的对比 ,表明了该算法的有效性     

ZL15轮式装载机摇臂零件有限元分析

摇臂零件的弯曲扭断是ZL15轮式装载机工作装置的常见故障之一.采用传统的类比方法进行装载机结构设计往往带有局限性.通过对装载机摇臂零件不同工况下的受力分析研究,建立最危险工况下的结构有限元模型,通过有限元分析计算,设计人员在设计阶段就能清晰地了解零件每一点的应力、应变、位移及构件的稳定性与动态特性,发现其设计的薄弱环节,同时可方便地对零件结构作反复的修改,以减小其应力集中区,从而提高摇臂零件的工作强度,改善装载机工作装置的综合性能,达到优化设计的目的.     

Multi-stage optimum design of magazine type automatic tool changer arm

To enhance machining efficiency, tool change time has to be reduced. Thus, for an automatic tool changer attached to a machining center, the tool change time is to be reduced. Also the automatic tool changer is a main part of the machining center as a driving source. The static attributes of the automatic tool changer using the commercial code, ANSYS Workbench V12, were tried to interpret. And the optimum design of automatic tool changer arm was proposed by performing the multi-stage optimum design. The shape optimization of the automatic tool changer was proposed and the result was verified to obtain acceptable improvements. It is possible to obtain an optimized model in which the maximum deformation, maximum stress, and mass are reduced by 10.46%, 12.89% and 9.26%, respectively, compared with those of the initial model. Also, the results between conventional method by the design of experiments and proposed method by the multi-stage optimum design method were compared.     

Calculation on the pitch angle of rocker of a rocker lunar rover in uneven terrain and path planning

For the concerted motion of rocker lunar rover, the pitch angle of rocker of a rocker lunar rover in uneven terrain must be calculated. According to the character of passive shape-shifting adaptive suspension of rocker lunar rover, the model of rocker lunar rover and the model of terrain were both simplified. The pitch angle of rocker was calculated using forward solving, reverse solving and the method of offsetting the curve of terrain re- spectively. Because of the banishment of the nonlinearity of equation sets of calculation by reverse solving, the calculation of the pitch angle based on reverse solving was programmed by means of MATLAB. Simulations were carried out by means of ADAMS. The result verified the validity of the calculation based on reverse solving. It provides the theoretical foundation for motion planning and path planning of rocker lunar rover. As applications of the calculation of pitch angle of rocker, the multi-attribute decision making of path based on the concerted motion planning and the predictive control on lunar rover based on the Markov prediction model were introduced.     

Calculation on the pitch angle of rocker of a rocker lunar rover on uneven terrain and path planning

Forthe concertedmotion of rockerlunar rover,the pitch angle of rocker of a rocker lunar rover in uneven terrain must be calculated.According to the character of passive shape-shifting adaptive suspension of rocker lunar rover,the model of rocker lunar rover and the model of terrain were both simplified.The pitch angle of rocker was calculated using forward solving,reverse solving and the method of offsetting the curve of terrain respectively.Because of the banishment of the nonlinearity of equation sets of calculation by reverse solving,the calculation of the pitch angle based on reverse solving was programmed by means of MATLAB.Simulations were carried out by means of ADAMS.The result verified the validity of the calculation based on reverse solving.It provides the theoretical foundation for motion planning and path planning of rocker lunar rover.As applications of the calculation of pitch angle of rocker,the multi-attribute decision making of path based on the concerted motion planning and the predictive control on lunar rover based on the Markov prediction model were introduced.     

平面曲柄摇杆机构图解设计新法探究

根据曲柄摇杆机构的特殊几何关系，给出了平面曲柄摇杆机构图解设计的新方法——特征三角形法．     

闭气塞自动检测装置的控制设计

为了实现火工品闭气塞的自动检测，利用可编程控制器（PLC）进行整体控制设计、以顺序控制继电器指令（SCR指令）作为实现控制的主要设计方法，实现了闭气塞的输送、定位、检测、抓取等环节按一定时序有节拍的控制、对闭气塞的几何尺寸、表面缺陷和表面粗糙度各参数的检测可以一次性顺序完成，并可实现零件的连续自动检测、在上位机中使用工控组态软件编写监控程序以实现检测系统的运行控制、实践结果表明：该方法与传统检测法相比较，显著的提高了闭气塞检测精度，检测速率每分钟可达12～16件，且性能稳定，控制品质好.     

复演位置的曲柄摇杆机构动力性能优化设计

已知曲柄摇杆机构的连杆三个运动位置,在满足许用传动角条件前提下,以机构动力性能为寻优目标,确定曲柄摇杆机构的几何尺寸。     

Fault-tolerant design for joint of HIT/DLR space robot arm

The joint reliability design for the HIT/DLR space robotic arm has been discussed in this paper. The redundant controller unit, redundant CAN bus communication unit and latch-up power protection unit have been outlined. The fault-tree of the joint has been built. Moreover, the algorithm for fault detection has been improved, and the fault-tolerant strategies of the joint have been proposed. Experimental results demonstrate the high reliability of the fault-tolerant design for the joint.