Blade automatic positioning method under rotational speed-free synchronous sensor

The invention relates to a blade automatic positioning method under a rotational speed-free synchronous sensor. The method includes the following steps: step 1: opening manual turning of a casing, andrecognizing a one-to-one correspondence relation between blade numbers and output signals of a tip timing sensor; step 2: obtaining a pulse sequence {V}; step 3: obtaining a blade arrival time sequence {t}; step 4: obtaining an included angle sequence; step 5: obtaining an included angle template sequence of an adjacent blade {theta}; step 6: obtaining a new included angle sequence, and performing blade numbering matching on the included angle sequence; and step 7: extracting a tip timing signal of a specific blade. 本发明涉及一种无转速同步传感器下的叶片自动定位方法，步骤如下：步骤一：打开机匣人工盘车，识别出叶片编号与叶尖定时传感器输出信号的一一对应关系；步骤二：获取脉冲序列{V}；步骤三：获取叶片到达时刻序列{t}；步骤四：获取夹角序列步骤五：获取相邻叶片夹角模板序列{θ}；步骤六：获取新的夹角序列对此夹角序列进行叶片编号匹配；步骤七：提取特定叶片的叶尖定时信号。