Method of Measuring the Moment of Inertia of Tractors and the Error Analysis
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摘要: 根据拖拉机的结构特点,构建了拖拉机转动惯量测量系统,建立了简化数学模型,设计了测量转动惯量的半框架。采用Pro/E软件精确获得测量用半框架的转动惯量,一次安装完成了拖拉机俯仰和侧倾转动惯量的测量,提高了测量精度。CF650型拖拉机转动惯量测量为例,对本文中所提出的测量方法进行了试验和误差分析,结果显示其转动惯量的相对误差小于3.10%,表明该方法的测量精度能满足工程要求。Abstract: Based on the structural characteristics of tractors, a system for measuring the moment of inertia of tractors was constructed. We also established a simplified mathematic model and designed a specialized half-framework for measuring the moment of inertia of tractor. Using the Pro/E software, the moment of inertia of the half-framework for measurement was obtained accurately. When the half-framework was fixed to the tractor, the moment of inertia of both pitch and roll can all be measured, and the measurement precision was improved. This method was validated in the measurement of moment of inertia for CF650 tractor made in Jiangsu Changfa Group, and the relative error of the moment of inertia was less than 3.10%. The results showed that this method had high precision and the system for measuring the moment of inertia of tractor established in this paper can meet the requirement of accuracy in engineering.
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