为研究新能源汽车CAN总线异常状态下的复杂特性,提出了基于数字化模型研究方法.利用MULITISIM软件建立了CAN总线物理模型,该模型数据与理论误差为2.8％.设计了一种CAN总线异常检测模型,研究了CAN总线在不同异常状态下的特性.以新能源汽车吉利EV300为基础搭建了CAN总线试验平台,对该试验平台进行了试验,对比实验数据结果和软件模型数据结果,误差在合理范围内.研究表明仿真模型可用于新能源汽车系统方案设计,为产品开发提供一种周期短、成本低的新方法.

为研究新能源汽车低压上电控制逻辑,分析了新能源汽车比亚迪秦EV的低压上电控制系统.对低压控制系统工作原理进行了分析,探索了比亚迪秦EV的低压上电逻辑.结合比亚迪秦EV新能源汽车的电路图进行了实验验证,利用低压上电控制逻辑提供低压不上电故障的思路,运用现代诊断设备成功解决了故障,实验证明探索性学习能成功验证新能源汽车低压上电控制逻辑.

为研究新能源汽车无钥匙进入系统控制逻辑,分析了新能源汽车比亚迪秦 EV 的无钥匙进入系统.对无钥匙进入系统工作原理进行了分析,探索了比亚迪秦EV的无钥匙进入系统.结合比亚迪秦 EV 新能源汽车的电路图进行了实验验证,利用无钥匙进入系统控制逻辑提供无钥匙进入系统故障的思路,运用现代诊断设备成功解决了故障,实验证明探索性学习能成功验证新能源汽车无钥匙进入系统控制逻辑.

为研究新能源汽车充电控制逻辑,分析了新能源汽车比亚迪秦 EV 的充电控制系统.对充电控制系统工作原理进行了分析,探索了比亚迪秦EV的充电逻辑.结合比亚迪秦 EV 新能源汽车的电路图进行了实验验证,利用充电控制逻辑提供充电故障的思路,运用现代诊断设备成功解决了故障,实验证明探索性学习能成功验证新能源汽车充电控制逻辑.

为研究新能源汽车高压上电控制逻辑,分析了新能源汽车比亚迪秦 EV 的高压上电控制系统.对高压控制系统工作原理进行了分析,探索了比亚迪秦EV的高压上电逻辑.结合比亚迪秦 EV 新能源汽车的电路图进行了实验验证,利用高压上电控制逻辑提供高压不上电故障的思路,运用现代诊断设备成功解决了故障,实验证明探索性学习能成功验证新能源汽车高压上电控制逻辑.

现代学徒制对师资队伍建设提高了要求,教师需具备双师能力即同时具备理论和实践教学能力.针对目前"双师型"教师队伍建设中出现的制度不健全、结构不合理、专兼职教师理论实践教学等问题,提出相应制度建设、师德教育、利用校内资源培养、行业技能培训、企业资源培养、校企双向挂职等方式进行"双师型"教师队伍建设,实践表明取得了良好的效果,教师理论教学实践能力、社会服务能力、科研能力得到了有效提高.

China’s economy is developing rapidly. This paper aims at the contradiction between the supply and demand of agricultural equipment technical talents and combines with the cultivation goal of agricultural machinery specialized talents to study and reform the training mode of applied technical talents in modern agricultural equipment. It aims to solve the problems of a large talent gap, serious aging, and old knowledge of agricultural equipment and technical talents. This study is conducive to alleviating the contradiction between talent supply and demand, and is helpful to the rural revitalization strategy and the "three high and four new" strategy of Hunan Province.

目的:解决传统机器人手运动模式和夹持功能单一,难以对不同摆放位置的食品包装盒进行夹持操作的问题.方法:提出了一种基于绳轮传动的欠驱动机器人手构型,实现机器人手左右两指间的平行夹持运动模式和指间自适应夹持模式.在此基础上,利用虚功原理对该欠驱动机器人手进行静力学分析,并对其两指间的末端夹持力进行求解.结果:无论包装盒是否位于中间位置,该机器人手的两指夹持力能保证包装盒的有效夹持.结论:该欠驱动机器人手的平行夹持运动稳定,且左右两指间可实现自适应夹持运动.

由于材料组织不均匀及尺寸误差等原因,高速电机转子在高速运转时会出现运转不平衡现象.为解决高速转子运转不平衡问题,设计了智能型高速转子动平衡检测系统,并使用该系统对高精度高速电机的转子进行动平衡检测与配平测试.试验结果表明,检测精度可达97.4％以上,平均配平时间为165.3 min,能够精确检测高速转子不平衡问题并实现快速配平.

履带式农业机械的工作环境一般较复杂恶劣,导致现有的履带式农业机械作业时履带张紧装置容易发生堵塞问题.履带在遇到冲击或者过沟过坎的情况下,若无缓冲功能将影响履带的使用寿命.通过改进设计了一款高强度履带式底盘,能增加履带的使用寿命,且拆装方便、结构稳固、不易发生堵塞.以履带式农用运输车为例,对所设计的履带式底盘进行试验和研究,改进和确定了该高强度履带式底盘的结构和参数.

为农业农村培养一批理论知识丰富、动手能力强的现代化农技人员,需要在教学环节和实践环节进行精心设计.线上教学采用实物演示加虚拟训练、线下以学生动手操演为主的方式可提高学生学习兴趣,确保教学实效.以课程模块为切入点,从学情分析、教学策略、教学实施、教学特色、教学改进等方面进行线上教学研究.

2022合金具有高强度、耐损伤、可时效强化等特点,可用于下一代超音速飞机蒙皮和战车装甲等领域,按构件形状的不同其来料可分为热轧和冷轧的区别.热轧板和冷轧板经时效处理后,发现热轧板较冷轧板的抗拉和屈服强度更高,但延伸率下降.在同种轧制实验条件下,垂直于轧制方向的抗拉和屈服高于沿轧制方向,延伸率降低.通过金相和透射电子显微镜发现,热轧板晶粒较冷轧板细小,再结晶晶粒多,且热轧板的析出相较冷轧板细小、密集的分布在铝基体中,在宏观上反应为抗拉强度及硬度更高.

Given the current situation of laboratory construction in higher vocational colleges, together with the exploration and practice of laboratory construction in Hunan Biological and Electromechanical Polytechnic, this paper elaborates the ba-sic idea of laboratory construction and management, summarizes the practical experience of reforming laboratory manage-ment system, strengthening the experimental team construction, as well as improving experimental teaching quality.

Based on ECAS, this paper intended to develop a modular air suspension height control system with WABCO4728800010 two-position three way solenoid valves and Free scale MC9S12D64 microprocessor as its core components. And a simulation test was conducted in MATLAB/Simulink environment. The air suspension height control strategy of this system was divided into four modules: start control module, dynamic adjustment module, manual adjustment module and errors adjustment module, which were controlled by module select switch. Simulation tests indicated that the air suspension height control strategy is featured by its logical control accuracy and debug convenience, and the modular design greatly reduced the system complexity and software development cycle and costs as well. Copyright © 2014 IFSA Publishing, S. L.

针对目前采用激光加热辅助车削加工工程陶瓷方面存在的缺陷及这些缺陷引起的表面质量问题,对影响工程陶瓷加工质量和精度的各个因素进行了综合的理论分析研究。以Al2O3工程陶瓷为例,进行了大量的试验及数据处理,绘制了切削深度、轴向进给速度、机床转速和激光功率等工艺参数对加工结果的影响曲线,分析出了采用激光加热辅助车削加工Al2O3工程陶瓷的最优参数范围。分析结果能够使工程技术人员对Al2O3工程陶瓷的加工性能有更深层次的认识,便于在加工过程中合理地选择相关参数,有效提高工件的加工精度和表面质量。

Based on the perspective of environmental protection and energy of the internal combustion engine and alternative fuel vehicle emission control technology, the advantages of electric vehicles and the driving force for development and China's development strategy are expounded. The main characteristics of electric vehicles and electric vehicles in the battery, motor and the engine driver with regard to the Issues and challenges, are analyzed.

本文主要探讨激光加热辅助切削Al2O3工程陶瓷时,不同加工工艺参数对加工表面质量的影响。通过实验结果对比分析,确定最佳的工艺参数。

This paper introduces the design of reverse springback compensation and node reverse springback offset compensation, one is to modify stress of dynain file to achieve reverse springback compensation, the other is to reverse offset the nodes of dynain file to achive reverse springback compensation. The example shows that both methods are effective.

Two tangent intake ducts of 4105 diesel engine and another one of ZH1105W diesel engine were investigated on the intake steady flow test-cell. Dimensionless vortex parameter and flow rate coefficient were obtained to evaluate these ducts to determine the final duct disposal. The result has shown that, with the nearly same vortex intensity of ZH1105W, the flow rate coefficient of the tangent intake duct of 4105 diesel engine is increased by 35%.

This article analysed the motion process of crank and slide block and described the motion model by OOP. The motion simulation procedure developed by C++ language can analysed motion parameter automatically.