可靠性强化试验技术在某型伺服作动器研制中的适用性探索

目的探索可靠性强化试验技术在典型机电液一体化产品伺服作动器研制过程中的适用性。方法以某型伺服作动器为研究对象,从故障激发的角度对可靠性强化试验技术的应用进行可行性分析,在响应调查和应力分析的基础上,结合产品的工作特点设计适用于该类伺服作动器的可靠性强化试验方案,包含低温步进应力试验、高温步进应力试验、快速温度循环试验10个循环、振动步进应力试验(包含气锤式三轴向六自由度超高斯随机振动方式及电磁振动台随机振动方式)及综合环境应力试验5个循环,并依此进行试验。结果在快速温度循环试验及综合环境应力试验过程中,均有效地激发出了产品的漏油故障,与相似产品外场暴露的漏油故障模式相吻合。结论可靠性强化试验技术可有效地应用于典型机电液一体化产品伺服作动器的研制过程,设计的可靠性强化试验方案可有效地激发外场出现频率较高的故障,可作为该类产品研制的试验手段之一。

Application of Reliability Enhancement Testing Technology in Development of Steering Gear

Objective To explore applicability of reliability enhancement test technology in development of typical electromechanical-hydraulic integration products-steering gear. Methods With a steering gear as object of study, the feasibility of reliability enhancement test technology was analyzed from exciting failure. Based on response investigation and stress analysis, a reliability enhancement testing of RET was designed in combination with working features of the product, including low-temperature stepping stress test, high-temperature stepping stress test, rapid temperature cycling test of 10 cycles, vibration stepping stress test (including three axis and six degree of freedom random vibration of air hammer and electromagnetic platform vibration) and comprehensive stepping stress test of 5 cycles. The experiment was carried out on this basis. Results Oil leakage failure was effectively excited in the rapid temperature cycling test and comprehensive stepping stress test. It is coincided with the failure of similar products used in the field. Conclusion The reliability enhancement test technology can be effectively used in development of electromechanical-hydraulic integration products, and can effectively activate the weakness with higher frequency in the field, and can be used as one of the methods in development of steering gear.