Need to look at it according to the specific graphics. Generally speaking, the impulse response function graph is a curve, with the horizontal axis representing time and the vertical axis representing response amplitude. If the graph is unimodal, it means that the system has a simple resonance frequency; If it is bimodal, it means that there are two different resonance frequencies in the system; If it is completely static, it means that the system is linear and the rotation is invariant. It should be noted that the transfer function and frequency response of the system can be further calculated by analyzing the impulse response function diagram, which is conducive to studying and optimizing the performance of the system.