Because of the great elastance of load and deficiency of conventional PID control, variable coefficient PID control method is put forward to improve the pressure control precision of the hydraulic system. 而针对负载弹性较大而常规PID控制方法应用在该系统中有明显不足,本文提出用变系数PID控制方法提高液压系统压力控制精度,该方法简单有效,适合工业应用。
This paper presents the model of approximate broken-line elastance for the step recovery diode ( SRD) in case where transition time is not zero ( t(?) 本文提出阶跃管在阶跃时间t7≠0时的倒电容折线近似模型;
It is suggested that, the nonlinear elastance coefficient(β) causes damping and is closely related with the flow limitation and the airway collapse. 非线性弹性系数在哮喘音产生中起阻尼作用,它可能与气道塌陷及气流流量限制有密切关系。