频率辨识开环系统传递函数，传递函数为 ，试通过正弦扫频及Bode图拟合来辨识该传递函数，写出其设计思想和详细推导过程，并给出仿真程序和仿真结果-Open-loop frequency identification system transfer function, transfer function, the sine sweep test and the Bode plot by fitting to identify the transfer function, write its design and detailed derivation and simulation program and simulation results are given