通过建立各缸空燃比不均匀的产生及传递模型,提出了一种利用改进遗传算法进行参数辨识的方法。新方法只需一个宽域氧传感器(universal exhaust gas oxygen sensor,UEGO)便能完成参数辨识,大幅度简化试验过程的同时能显著降低试验成本。...通过建立各缸空燃比不均匀的产生及传递模型,提出了一种利用改进遗传算法进行参数辨识的方法。新方法只需一个宽域氧传感器(universal exhaust gas oxygen sensor,UEGO)便能完成参数辨识,大幅度简化试验过程的同时能显著降低试验成本。结合卡尔曼滤波算法建立的各缸空燃比观测器,构建了平衡各缸空燃比的反馈控制系统。GT-Power与Simulink联合仿真结果表明:新方法能将各缸空燃比差异从原来的±10%减至±1%以内。展开更多
With the increase of bridge reconstruction schemes, synchronous lifting of a bridge is more and more widely used. In order to solve the problems associated with the synchronoas lifting of a bridge, a multi-cylinder sy...With the increase of bridge reconstruction schemes, synchronous lifting of a bridge is more and more widely used. In order to solve the problems associated with the synchronoas lifting of a bridge, a multi-cylinder synchronous lifting power and monitoring system has been developed. This is a distributed control system, which is com- posed of an industrial computer workstation, a programmable logical controller and a hydraulic control system. The system can achieve distributed control and centralized operation of actuators, and centralized management of infor- mation. It not only can implement multi-cylinder synchronous lifting with an unbalanced load, but also can moni- tor the pressure, displacement and stress at each lifting point. The performance of the multi-cylinder synchronous system is verified through its application to several bridge lifting engineering projects. The details of such a project are given.展开更多
文摘通过建立各缸空燃比不均匀的产生及传递模型,提出了一种利用改进遗传算法进行参数辨识的方法。新方法只需一个宽域氧传感器(universal exhaust gas oxygen sensor,UEGO)便能完成参数辨识,大幅度简化试验过程的同时能显著降低试验成本。结合卡尔曼滤波算法建立的各缸空燃比观测器,构建了平衡各缸空燃比的反馈控制系统。GT-Power与Simulink联合仿真结果表明:新方法能将各缸空燃比差异从原来的±10%减至±1%以内。
基金supported by the Ph.D. Programs Foundation of Ministry of Education of China under Grant No. 20070056010Tianjin Municipal Natural Science Foundation under Grant No.07JCZBJC09900Tianjin key technology research for majorproject under Contract No.05ZHGCGX00500
文摘With the increase of bridge reconstruction schemes, synchronous lifting of a bridge is more and more widely used. In order to solve the problems associated with the synchronoas lifting of a bridge, a multi-cylinder synchronous lifting power and monitoring system has been developed. This is a distributed control system, which is com- posed of an industrial computer workstation, a programmable logical controller and a hydraulic control system. The system can achieve distributed control and centralized operation of actuators, and centralized management of infor- mation. It not only can implement multi-cylinder synchronous lifting with an unbalanced load, but also can moni- tor the pressure, displacement and stress at each lifting point. The performance of the multi-cylinder synchronous system is verified through its application to several bridge lifting engineering projects. The details of such a project are given.
