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判别机械系统稳定性的乃奎斯特（以下简称乃氏）判据；导出了适用于矿用装载机械系统稳定性判别的乃氏判别式；提出了改善矿用装载机转向系统稳定性的途径。
The criterion of determining the stability of the mechanical system is the Nyquist criterion (hereinafter referred to as Nai’s), and the Nautic’s discriminant applicable to the stability of the mining machinery system is derived. The way to improve the stability of the steering system of the mining loader is proposed .