Determination of Weak Knock Characteristics for Two-Stroke Spark Ignition UAV Engines Based on Mallat Decomposition Algorithm

<div>Time-domain diagram of the cylinder pressure signal and the engine vibration signal collected synchronously at 5000 rpm when the ignition advance angle is 25°CA. (a) The time-domain diagram of the cylinder pressure signal. (b) The time-domain diagram of the engine vibration signal.</div>

Mathematical Problems in Engineering

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Figure 10

Figure 10: Determination of Weak Knock Characteristics for Two-Stroke Spark Ignition UAV Engines Based on Mallat Decomposition Algorithm 