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在基于电流信号的铣削力估计中,提出将铣削力的估计分为常值部分与时变部分分开估计的策略.为了实现铣削力动态波形的精确估计,对实测电流信号和铣削力信号进行了深入的分析,提出采用分频估计的方式进行铣削力波形的估计.当使用电流进行铣削力估计时,先将电流信号按频率特征分解为不同电流分量,然后分别估计每种电流分量对应的铣削力分量大小,最后合成铣削力的估计值.不同转速、切深、切宽下的实验表明这种铣削力的估计方法可以很好地对动态的铣削力进行估计.
In the estimation of milling force based on the current signal, the strategy of dividing the estimation of milling force into two parts: the constant value part and the time-varying part is proposed separately.In order to realize the accurate estimation of the milling force dynamic waveform, the measured current signal and milling force signal In-depth analysis, the use of frequency estimation of the milling force waveform is proposed.When the current is used to estimate the milling force, the current signal is first decomposed into different current components according to the frequency characteristics, and then separately estimated for each current component of the corresponding milling Force component size and the final synthetic milling force.Experiments under different rotating speeds, depth of cut and width show that this milling force estimation method can estimate the dynamic milling force well.