In order to evaluate navigation performance of inertial measurement unit（ IMU）

convenient

efficient and low-cost evaluation methods are needed. A new method based on signal grafting is verified and analyzed

to evaluate the navigation performance of IMU. Three kinds of medium and low precision IMUs are used as samples

to check the evaluation effectiveness of the proposed method

the evaluation results using this method are compared with their actual road test results. Experimental results show that the navigation performances of the grafted IMU data matched much better with that of the real IMU data compared with the simulation IMU data. The proposed signal grafting method is not only reliable and feasible

but also low-cost and efficient

therefore

it has high application value in IMU performance evaluation of medium and low precision.