In order to improve the working accuracy of machine tool products,taking the inlet throttle governing circuit as the re-search object,the study on the reliability and sensitivity of its speed accuracy was carried out.The velocity-load characteristics of inlet throttle governing circuit were analyzed systematically,and the velocity expression of hydraulic cylinder piston could be deduced.The stochastical perturbation theory and fourth-order moment technology were used to establish a model for velocity reliability analysis of in-let throttle governing circuit.Finally,the sensitive parameters affecting the speed accuracy were determined by the reliability sensitivity analysis.The research results show that the valve opening of throttle valve has the greatest influence on the reliability of speed accuracy,so the design should be reduced and the tolerance should be strictly controlled in the design process.
关键词
节流调速回路/速度精度/随机摄动理论/四阶矩技术/可靠性灵敏度分析
Key words
throttle governing circuit/speed accuracy/stochastical perturbation theory/fourth-order moment technology/reliability sensitivity analysis
维普
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