按需功率匹配的重型车辆E-ECHPS节能机理与协调控制研究

项目名称： 按需功率匹配的重型车辆E-ECHPS节能机理与协调控制研究

项目编号： No.51275211

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 江浩斌

作者单位： 江苏大学

项目金额： 80万元

中文摘要： 针对重型车辆液压助力转向系统（HPS）在能耗和转向路感方面存在的突出问题，从协调HPS的节能和转向操纵性出发，提出一种用电磁转差离合器（ESC）调节转向泵输出功率以实现低能耗及可变助力特性的新型电控液压转向系统（E-ECHPS），并创建重型车辆的理想转向助力特性；基于按需功率匹配思想，建立E-ECHPS中供能、输能和耗能元件之间的功率匹配关系，揭示E-ECHPS协调节能与操纵的机理；根据方向盘转角/转矩、车速和发动机转速对ESC电流进行非线性闭环控制，研究动态参数在线调节的自适应模糊滑模控制策略，基于李雅普诺夫函数演算规则参数的自适应率以增强控制系统的鲁棒稳定性；通过结构性能参数与控制参数的联合优化，提高系统的敏捷性；研究E-ECHPS系统的集成设计理论与优化匹配方法，研制E-ECHPS关键零部件和样机并进行试验验证，实现E-ECHPS比传统HPS节能30%以上、整车操纵稳定性显著提高。

中文关键词： 重型车辆；电控液压转向系统；馈能型电磁转差离合器；按需功率匹配；操纵稳定性

英文摘要： For solving the critical problem of energy consumption and steering feel of the heavy-duty vehicles hydraulic power steering system (HPS), aiming to the coordination of energy-saving and steering maneuverability, a new electronically controlled hydraulic steering system (E-ECHPS) is proposed, which is characterized by an electromagnetic slipping clutch (ESC) to adjust the steering pump output power to achieve low-power and variable assisted force features. The corresponding assist characteristic curve for heavy-duty vehicles is created. Based on the ideology of on-demand power matching, the relationship between power supply, transmission and terminal components of E-ECHPS is established to reveal the coordination mechanism between energy-saving and maneuverability. According to the steering wheel angle/torque, vehicle speed and engine speed, the ESC current is controlled in nonlinear closed-loop. The adaptive fuzzy sliding mode control strategy for dynamic parameters on-line setting is investigated. Using the Lyapunov function, the adaptive rate of rule parameters is deduced, which enhances robust stability of control system. The agility of the E-ECHPS system is improved by the joint optimization of the structural and control parameters, and the system integrated design theory and optimization matching method ar

英文关键词： Heavy-duty vehicle；Electronically controlled hydraulic power steering；Energy reclaiming type electromagnetic slip clutch；On-demand power match；Handling stability