外加电压对三氧化二铝/黄铜摩擦副摩擦的主动控制试验研究

Study on Active Control of Friction of Alumina/Brass Couple

研究了用外加电压法对三氧化二铝／黄铜摩擦副的低速滑动摩擦行为进行主动控制的技术．结果表明：通过合理选择控制算法中的步长参数，能使摩擦系数的波动幅度得到有效控制；摩擦系数预定目标值与实测值之间的误差可控制在 ３％ 之内，即摩擦系统能够达到较高的控制精度．由初始值到达目标值所需过渡过程的长短与控制算法中的步长参数有关，试验中稳定系统的过渡过程约为 １０～３０ ｍ ｉｎ．上述结果显示。

Experimental study on frictional behaviors of Al 2O 3/Cu rubbing couple at a low sliding speed was carried out to explore a technology of active control of friction. The experimental results show that by selecting step size parameter of control algrithm properly, the fluctuation of the friction coefficient vs. time curve can be reduced prominently. The difference between the target coefficient and the achieved friction coefficient is less than 3%. Therefore, the rubbing system can reach a stage of stable friction coefficient under the specific control procedure. The transition period, about 10～30 min before the target friction coefficient is achieved for non oscillating systems,is mainly determined by the step size parameter of the control algrithm. Thus active control of friction is possible by applying a controlled external electric field.