重载车辆气压制动系统与油气悬架耦合协同控制方法研究

There are some problems on heavy-duty vehicle in the course of driving and braking, such as the rise of temperature causes the change of body posture, and causes unstable suspension performance, and reduce vehicle braking performance. These problems seriously affect the stability and safety of the heavy-duty vehicle. The project will research the cooperative control method of pneumatic braking system and hydro-pneumatic suspension for heavy-duty vehicle. The coupled system of Pneumatic Braking System and Hydro-pneumatic Suspension will be innovative designed. Energy transfer path for heavy-duty vehicle will be analyzed under driving and braking conditions. The distribution of temperature field in the coupled system will be obtained with the heating/cooling mechanism of the related parts. The influence factors of energy dissipation will be analyzed. The influence rule between complex temperature field and vehicle performance will be found. The matching law of the coupled system in the condition of temperature rise will be studied. Under the condition of complex temperature field, the control method of the active hydro-pneumatic suspension will be studied to improve the vehicle ride comfort. A braking force distribution control strategy will be proposed under the condition of complex temperature field to improve the response time of brake chamber, and to short braking distance, and to improve the stability of vehicle under braking and steering conditions using the yaw moment control. The research results provide new theory and method on the design of the coupled system of pneumatic braking system and hydro-pneumatic Suspension, has important scientific significance and application value.

重载车辆在行驶和制动过程中存在温升导致车姿变化大、悬架性能和制动效能不稳、制动跑偏乃至制动失稳等问题，严重影响车辆稳定性和行驶安全性。为解决上述问题，开展气压制动系统和油气悬架耦合系统协同控制方法研究。主要研究内容包括：气压制动系统和油气悬架耦合系统创新设计；研究重载车辆在行驶和制动过程中的能量传递转化路径，结合相关零部件生热/散热机理，分析进而获取耦合系统温度场的分布；研究耦合系统能量耗散的影响因素，获取复杂温度场对整车性能的影响规律；探索考虑温升条件下的耦合系统元件器匹配方法。研究耦合系统在复杂温度场条件下主动油气悬架控制方法实现对车辆平顺性控制；研究耦合系统在复杂温度场条件下制动力分配控制策略，在提高制动气室响应时间、缩短制动距离的同时实现横摆力矩控制，保证车辆制动和转向的稳定性。该项目研究成果可为气压制动和油气悬架耦合系统提供新的设计理论和方法，具有重要的科学意义和应用价值。

重载车辆在行驶和制动过程中存在温升导致车姿变化大、悬架性能和制动效能不稳、制动跑偏乃至制动失稳等问题，严重影响车辆稳定性和行驶安全性。为解决上述问题，开展气压制动系统和油气悬架耦合系统协同控制方法研究。针对气压制动系统和油气悬架系统具体特点，分别提出了2种以上创新设计方案；重点研究轮胎、制动盘、油气悬架零部件生热和散热机理；研究重载车辆在行驶和制动过程中的能量传递转化路径，分析进而获取耦合系统温度场的分布； 研究耦合系统能量耗散的影响因素，获取温度对整车性能的影响规律；探索考虑温升条件下的耦合系统元件器匹配方法。研究耦合系统在不同复杂温度场条件下油气悬架控制方法实现对车辆平顺性控制；研究耦合系统在不同温度条件下制动力分配控制策略。为验证控制理论的正确性，在全地面起重机上对气压制动系统和油气悬架系统进行改制并进行试验，该项目研究成果可为气压制动和油气悬架耦合系统提供新的设计理论和方法，具有重要的科学意义和应用价值。