电液伺服阀放大器的机内测试技术

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

摘要:
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。

Abstract:
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.