Fault-tolerant control method and characteristic analysis of hydraulic redundant EMA system
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摘要: 研究了一种应用于未来多电飞机的复合式余度机电作动系统,它由2台双绕组无刷直流电动机组成,形成4个电气控制通道和2个电动机控制通道的余度结构,具有"单故障工作、双故障安全"的容错能力.分析了容错工作状态下电动机和逆变器的损耗、减速器的力矩纷争等性能,提出了在"单故障工作"时应采用电动机功率损耗均衡控制方法以获得最佳的综合性能,同时分析了"双故障安全"时系统的输出能力,并通过仿真分析和比较了各种状态下系统的跟踪性能,最后给出一组容错运行状态下电动机的温升试验数据.Abstract: A kind of hydraulic redundant electro-mechanical actuator (EMA) system used in the next generation more power aircraft was focused on, which is made up of two brushless DC motor with dual electrical channels. In such case, the fault-tolerant operation capability of‘fault -operation/fault-safe’ was advanced. The loss of inverter and motor and force fighting in the retarder were analyzed. A motor loss balance method by which EMA system would obtain the best synthetic performance under the situation with one channel fault was brought forward. Then the system output capability under the situation with two channels fault was analyzed. The tracking performances under different situations were simulated and analyzed. Finally a set of data of the motor temperature rise examination under fault-tolerant operation was presented.
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Key words:
- blushless DC motor /
- electro-mechanical actruator /
- fault-tolerant control /
- redundancy
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