直接状态 meaning in English

straight state

In this thesis , based on mathematic model and real condition , analysis and compare of different control methods are carried out at first . then a propriety control law and optimized parameters are choosen and used into multi - body model in simpack . finally , kinds of dynamic character curves after measurement and calculation are given
论文首先在数学建模的基础上，根据实际情况，详细分析对比了直接状态反馈控制、 pid控制和状态观测器控制等常用的磁浮列车悬浮控制方法，然后将合适的控制规律及优化的控制参数用于simpack中的多体模型，通过计算，给出悬浮稳定性、运行平稳性以及列车曲线通过等动力学特性曲线。