In this paper, the control distortion near the zero crossing point is magnified; a method to minimize the distortion is proposed.
本文中，在接近零交叉点附近的控制畸变被放大，提出了一种减小这种畸变的方法。
When their orbit eccentricity or inclination are near zero, some problems may occur when the GPS Kepler orbit elements fitting method is applied to fit their broadcast ephemeris parameters.
导航卫星一般采用近圆轨道，当卫星轨道偏心率或者轨道倾角接近于零时，利用GPS卫星开普勒轨道根数拟合卫星广播星历会出现一些问题。
A new braking system model was built from a study on the solution method of the friction brake torque under the conditions of braking to near zero speed and braking lock.
研究了制动近零状态和制动抱死状态下制动力矩的求解理论，开发了一种新的制动系统模型。
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