由气门加速度积分和气门升程微分得到两路气门速度信号。
Two kinds of valve velocity data were got from valve acceleration integral and displacement differential.
气门加速度信号的微小漂移，将导致积分的速度信号严重失真。
Small shifting of acceleration signal will result in the abnormal alteration of valve velocity.
压电式加速度传感器的漂移问题在气门动态特性试验中难以避免。
It is unavoidable for the shifting problem of piezoelectric acceleration sensor in the experiment of valve dynamic characteristic.
对顶置式气门机构进行了运动学分析，通过平底推杆的运动规律求得气门的升程、速度和加速度，分别给出了精确解和近似解。
In this paper, kinematics of upper air valve unit is analyzed. The displacement, velocity and acceleration of air valve are calculated by accurate and approximate methods.
对顶置式气门机构进行了运动学分析，通过平底推杆的运动规律求得气门的升程、速度和加速度，分别给出了精确解和近似解。
In this paper, kinematics of upper air valve unit is analyzed. The displacement, velocity and acceleration of air valve are calculated by accurate and approximate methods.
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