An attractor feature parameter K was defined to quantitatively study a friction vibration attractor,and its variation was investigated in the running-in wear process.K was the feature parameter of the eigenvectors built with the attractor phase-space-matrix singular values obtained using the C-C method and the phase-space reconstruction theory. Results showed that friction vibration energy is lower in the beginning stage,the attractor volume is smaller and K is 9.36;when the running-in continues,the friction vibration energy increases,the attractor volume gets larger and K also increases gradually;friction vibration energy is stable after 43 min,attractor volumes are also stable and K fluctuates near 24.72;therefore,K can be used to quantitatively analyze the variation of friction vibration energy in the running-in process;the identification of wear state with K is consistent with that using friction coefficient,and K can be used to monitor the wear state of tribological pairs.%为定量研究摩擦副磨损过程中摩擦振动吸引子的变化，根据相空间重构理论，应用 C －C 法重构摩擦振动吸引子相空间矩阵，对相空间矩阵进行奇异值分解，通过奇异值构建矩阵奇异值特征向量，定义其特征参数为摩擦振动吸引子特征参数 K，并分析特征参数 K 在摩擦副磨合磨损过程中的变化规律。结果表明：磨合开始，摩擦振动能量较低，吸引子体积较小，K 值亦较小，为9．36；随磨合进行，摩擦振动能量逐渐增加，吸引子体积逐渐增大，K 值亦逐渐增大；43 min 后，摩擦振动能量保持平稳，吸引子体积趋于稳定，K 值在24．72附近平稳波动。因此，摩擦振动吸引子参数 K 可用于定量分析磨合过程中摩擦振动能量的变化；K 与摩擦因数对磨损阶段的判断一致，进而可用于磨损状态的识别。
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