履带车辆换挡离合器作为车辆起步离合器的技术

分析了装有行星变速箱的履带车辆的主离合器起步和换挡离合器起步过程,提出了利用换挡离合器作为起步离合器的无主离合器起步方法,并且制定了换挡离合器起步的控制策略。实车试验表明,利用换挡离合器起步的方案可行,基本满足起步过程的平顺性要求。     

汽车AMT自动离合器的局部线性化模糊滑模控制

由于受离合器的非线性动态特性、外部扰动以及参数时变等因素的影响，实现自动离合器的精确接合过程控制非常困难。采用局部线性化模糊滑模控制器（RWLFSMC）实现对无刷直流电动机驱动的自动离合器位置控制，RWLFSMC采用局部线性化技术来减少模糊规则数，同时设计缩放因子调整器来调整输出增益，保证控制器的实时性和有效性。数值模拟结果表明，与传统的模糊滑模控制器（FSMC）相比，RWLFSMC具有良好的轨迹追踪性能，此外对外部扰动、时延、参数时变等具有较高的鲁棒性。     

Do harlequin Mediterranean environments function as source sink for Blue Tits (Parus caeruleus L.)?

We investigate whether a mosaic of habitats of different quality functions as a source-sink system for the Blue Tit Parus caeruleus L. Breeding parameters, especially laying date, clutch size and breeding success have been studied in relation to the food supply in three habitats: two habitats, one rich and one poor, next to each other on the mainland (southern France) and one poor habitat on the island of Corsica. Food resources are more abundant and are available earlier in the season in the rich habitat than in both the mainland and the island poor habitats. The timing of breeding is nicely timed on the food peak of abundance in the rich mainland habitat and in the poor insular one but tits are mistimed in the poor mainland habitat because they start to breed too early in relation to food availability. Such patterns strongly suggest that the rich mainland habitat where birds produce many fledglings functions as a source from which birds emigrate in the poor habitat which functions as a sink. These birds which are genetically programmed to breed in the source habitat become mistimed in the sink. Tits on Corsica which are isolated from any mainland population have adjusted their breeding traits on the local patterns of food availability and abundance. This hypothesis is supported by the existence of a strong genetic component of laying date which has been experimentally proved.     

车辆制动与离合踏板联动问题的研究

安全问题是汽车和拖托机的关键性问题，利用液压技术解决制动与离合的配合问题在经济性方面有很强的优势。     

绿化用草皮装载输送机的设计研究

对绿化用草皮装载输送机的结构、主要参数、工作部件、工作性能和工作原理做了分析，并进行了机具的结构设计和试制。实践表明，设计达到了预期的效果，并在很大程度上提高了生产效率，可广泛应用于草坪种植基地。     

基于Ansys的发动机离合装置动力输出轴的仿真研究

针对传统的离合装置结构不适用于大功率收获机工作的问题,设计了一种可实现发动机对工作部件分步驱动的离合装置,利用有限元仿真分析方法对离合装置进行研究。结果表明：在接合过程中,输出轴与行走驱动皮带轮结合处一侧的应力较为集中,存在发生形变的可能,动力输出轴能在0.48s完成对负载扭矩的传递,实现稳定的扭矩输出,该装置可以有效保护发动机及工作部件的使用寿命。     

双离合器混合动力系统稳态工况的仿真

针对单轴并联式(ISG)混合动力系统中能量回收效率低等不足,设计了一套含双离合器的总成结构方案,并采用较大功率的电动机.根据汽车动力学理论计算了车辆在中国典型城市等多种工况下的需求动力,对新方案的动力和传动进行了稳态工况的建模和仿真,仿真及试验结果表明,新方案的动力性可以实现无转矩波动的状态切换过程,改善了状态切换过程中动力传递的平顺性,缩短工况过渡的时间(从8s缩短剑4s),燃油经济性和排放性能也有一定的提高.     

Modeling and control system simulation of automobile DCT

In order to reduce development time and cost of dual clutch automated mechanical transmission(DCT) control system,the dynamic model of automobile DCT control system is established by Matlab/SimDriveLine and the engine model is improved by neural network.Based on Matlab/Simulink,the simulation models of DCT control during starting phase,shift phase and shift rule are set up,and then the whole system of DCT is simulated.The simulation result indicates that the DCT system dynamic model and the designed controller are reasonable and feasible,and proofs that the model is suitable for developing DCT control system and improves the design efficiency of DCT system.     

推土机干式常接合主离合器液压助力装置的研制

为解决推土机干式常接合主离合器机械式操纵费力,容易给驾驶员带来疲劳的问题,我们在广泛吸收国内外工程机械产品先进液压技术的基础上,自行研制完成了推土机主离合器机械式操纵的液压助力装置。有效地减轻了驾驶员的劳动强度,提高了劳动效率,为同类农业机械产品离合器液压助力装置的研制提供了一个参考。     

离合踏板振动分析与优化

介绍了离合传动系统的基本结构及离合踏板振动的一些主观评价方法,然后以某轿车为例,对其进行离合踏板的振动测试,并对离合踏板振动产生的机理和结果进行频谱分析,确定了踏板发生振动的原因,并采用三种优化方案来改进踏板振动问题.根据对比分析发现,通过在液压回路中采用膜片式减振阀和螺旋管的方式,可以对踏板振动实现最大优化,以此来提高离合系统的舒适性.最终通过实车测试证明,该方案的改善效果比其它两种方案更理想.