In frequent spee d the power spectrum of the engine load in plowing and the low random element of the engine load in rototilling can be simulated by a single peak spectrum funct ion.

• 在常用的速度范围内，犁耕发动机载荷以及旋耕发动机载荷的低频随机成分的功率谱均可以采用一种单峰谱函数拟合。