智能汽车电子真空助力器设计

为优化智能汽车电子真空助力器系统设计, 达到满足智能汽车的自适应巡航控制系统、自动紧急刹车系统的制动性能和控制性能的应用要求。利用AMESim 一维仿真软件分析汽车电子助力器主动控制匹配参数及ANSYS workbench 软件匹配电磁阀结构参数, 给出了电磁阀行程、驱动电参数和线圈参数等关键设计参数的匹配方法。该方法满足智能汽车的自适应巡航控制系统、自动紧急刹车系统的应用要求, 为提高EVB(Electronic Vacuum Booster)系统智能车辆制动控制的可靠性和舒适性提供借鉴参考。     

汽车自适应巡航控制系统研究现状与发展趋势

作为传统定速巡航的升级,自适应巡航控制(adaptive cruise control,ACC)系统可以提高驾驶舒适性和行车安全性.论文概述了ACC系统的发展历程,从环境感知技术、驾驶员跟车行为特性、车辆动力学建模、ACC系统控制算法、ACC系统功能扩展等方面对近年来ACC系统的最新研究成果进行了详细论述,在此基础上讨论并展望了ACC系统研究的共性问题与发展趋势.     

安装误差和动不平衡对旋转导弹惯性器件输出的影响及补偿

为了提高旋转导弹惯性器件的测量精度.建立了弹体坐标系和动平衡坐标系并给出其转换关系;给出了陀螺仪坐标系、加速度计坐标系分别与弹体坐标系之间的转换关系.推导了安装误差和弹体动不平衡引起的陀螺仪和加速度计的测量误差模型,并进行了仿真.结果表明,利用直接补偿和高通滤波补偿方法实现了对陀螺仪和加速度计测量结果的补偿,仿真结果验证了补偿方法的可行性.     

Optimization of Cockpit Ventilation for Polar Cruise Ships in Combination with Windscreen Defogging and Cabin Comfort Considerations

Polar cruise ships are exposed to extreme external conditions during voyages, resulting in cockpit windscreens that are prone to fogging and frosting, seriously affecting the driver’s vision and even threatening navigation safety. However, the current research mainly focuses on cabin comfort, ignoring the coupling of defogging and comfort. Accordingly, this paper combines cockpit-windshield-defogging design and cockpit comfort considerations, and proposes 108 orthogonal-ventilation design parameters based on the four basic ventilation methods. The effects of different air supply parameters on comfort and anti-fog characteristics are investigated by using fluid dynamics simulation methods. The entropy weight–TOPSIS algorithm is employed to find the optimal ventilation parameters. The results show that the “Down-supply up-return type vertical jet” air supply method corresponding to an air supply velocity of 1 m/s, an air supply temperature of 297 K, and an air supply relative humidity of 30% has the smallest Euclidean distance di+ from the positive ideal solution, and the largest Euclidean distance di− from the negative ideal solution; thus, it obtains a higher ci and the highest priority. This air supply method provides the best thermal comfort for the drivers, as well as the best anti-fogging and defogging effect. The results can be useful to provide suggestions for the future design of the air-conditioning systems in polar cruise ships.     

高超声速飞行器周期巡航条件的确定

针对不同已知条件,分别用Newton-Raphson迭代法和遗传算法确定了高超声速飞行器周期巡航的条件. 并且用胞映射法计算得到周期巡航不动点的吸引域. 结果表明,只要满足特定条件,高超声速飞行器就可实现周期巡航,且巡航初始值可在较大的范围内进行选择.     

Longitudinal Acceleration Tracking Control of Low Speed Heavy-Duty Vehicles

This paper presents a model matching control （MMC） method based on the sliding mode control （SMC） method for longitudinal acceleration tracking control in a vehicular stop-and-go cruise control system. The nonlinearity of the vehicle acceleration response at low speeds was analyzed to develop a transfer function model of the vehicle longitudinal dynamics using the least-mean-square system identification technique. This transfer function was then used to design the MMC controller, including an SMC feedback compensator. The system combines the advantages of the two control methods with robust control and rapid response. Simulations show that the controller enhances the rapid trackability to the vehicle acceleration and improves the system＇s robustness at low speeds compared with conventional PID MMC controllers.     

侵权视角下的邮轮旅客人身损害法律救济研究

邮轮旅游作为新兴的事物,在带来经济勃兴和满足消费者需求的同时,有关邮轮旅客人身损害纠纷的数量也呈现增长趋势。从近年来两起典型的邮轮旅客因人身损害涉诉的案例切入,分析在海上航程中发生人身损害纠纷时,邮轮旅客以侵权为诉因进行法律救济时如何确定管辖法院和法律适用,最终确定不同主体的法律责任,在侵权视角下为邮轮旅客提供维权指南。     

搭载EM-CVT的MPV动力性仿真分析

无级变速器(CVT)没有普通自动挡变速箱的传动齿轮,所以就没有自动挡变速箱的换挡过程,由此带来的换档顿挫感也随之消失,动力输出呈线性,在实际驾驶中非常平顺.而机电控制式无级变速器(EM-CVT)的控制更加简单,响应更快,从而使整车性能、耗油、废气排放的平衡,都更容易达到.文中利用AVL Cruise仿真软件,进行了EM-CVT传动系统建模仿真分析.应用该软件建立的车辆动力传动系统模型更容易调试且直观性强,不仅可以节省大量时间,而且便于分析仿真结果以及修正参数,从而快速完成系统的设计.     

便携导弹抗击巡航导弹作战效能研究

根据便携导弹和巡航导弹的基本性能指标,对便携导弹抗击巡航导弹的作战效能进行了分析计算,给出了计算结果,并提出了提高便携导弹抗击巡航导弹作战效能的技术途径。     

导弹变深度发射动力调节技术研究

该文针对导弹变深度发射提出通过改变发射装置高压室喷管喉部的通气面积来实现发射动力可调。通过内弹道设计和计算，给出了对应于发射深度范围的通气面积调节范围，并分析了通气面积对导弹运动、发射装置内弹道性能的影响。计算和分析结果表明，通过改变喷管喉部的通气面积，使导弹发射装置的燃气动力得到了有效调节，从而在理论上实现了导弹的变深度发射。