电液伺服阀放大器的机内测试技

Built-in test technology for electro-hydraulic servo-valve amplifier

[目的]电液伺服阀的工作环境恶劣、测试性设计欠缺,为了提高电液伺服阀的易用性和维修性,需开展机内测试设计。[方法]针对电液伺服阀内放大器的特点,提出一体化机内测试(BIT)方法,开展BIT软/硬件实现和防虚警措施的具体设计,并搭建闭环电液伺服系统进行验证。[结果]试验结果表明,该BIT设计方法可行,实现了在线、快速的故障检测功能。[结论]BIT方法是降低电液伺服系统全寿期维护成本的有效途径,具有一定的工程应用价值。

[Objectives]The electro-hydraulic servo valve operates in a harsh working environment but lacks integrated testability.In order to improve the usability and maintainability of electro-hydraulic servo valves,it is necessary to design a built-in test(BIT).[Methods]A BIT method involving the characteristics of the valve amplifier is proposed.On this basis,the implementation of BIT software/hardware and the concrete design of anti-false alarm measures are given,and a closed-loop electro-hydraulic servo system is constructed for verification.[Results]The verification test results show that this design method is feasible and can quickly detect faults online.[Conclusions]The BIT method is an effective way to reduce the maintenance cost of the electro-hydraulic servo system life cycle,giving it certain engineering application value.