SBIR Phase I: Active Control of Gas Turbine Engines Using Eddy Current Sensors

该小型企业创新研究第一阶段项目将利用通用动力先进技术系统（GDATS）涡流传感器（ECS）阵列，开发用于主动控制叶片振动和发动机稳定性（失速和浪涌）的算法。对飞机机动性和效率的需求不断增加，促使发动机设计师生产更轻的发动机，这些发动机必须在稳态和动态发动机面扭曲水平增加的情况下运行。这种发动机需要主动控制系统以保证安全运行。与GDATS紧密合作，积极参与发动机故障检测的信号分析和诊断工具的开发。我们将在主动控制算法的开发中利用正在进行的ECS诊断工具的开发。目前的ECS诊断工具已经能够提供尖端间隙曲线，以及振动和失速指标。我们建议将ECS系统的功能从诊断扩展到燃气轮机发动机的主动和自动实时控制。从这个项目中，我们期望开发利用GDATS ECS阵列对燃气轮机叶片振动和稳定性进行主动控制的算法。GDATS ECS阵列是目前安装在联合攻击战斗机上的首选传感器系统。软件系统升级，能够使用ECS数据计算必要的指标，并估计主动振动和发动机稳定控制所需的干扰，将是非常可取的。如果能够实现这一点，将减少主动控制所需的新传感器的数量，从而可能节省数百万美元。

This Small Business Innovation Research Phase I project will address the development of algorithms for active control of blade vibration and engine stability (stall and surge) using the General Dynamics Advanced Technology Systems (GDATS) eddy current sensor (ECS) array. The increased demand for aircraft maneuverability and efficiency drive the engine designers to produce lighter engines that will have to operate in the presence of increased levels of steady-state and dynamic engine-face distortion. Such engines demand active control systems for safe operation. Working closely with GDATS, the proposer has been actively involved in the development of signal analysis and diagnostic tools for the detection of engine faults. We shall leverage this ongoing development of diagnostics tools for the ECS in the development of active control algorithms. Current ECS diagnostic tools are already able to provide tip clearance profiles, as well as vibration and stall indicators. We propose to extend the functionality of the ECS system beyond diagnostics to active and automatic real-time control of gas turbine engines. From this project we expect to develop algorithms for active control of gas turbine engine blade vibration and stability that make use of the GDATS ECS array. The GDATS ECS array is currently the favored sensor system for installation on the Joint Strike Fighter. A software system upgrade capable of using ECS data to compute the necessary indicators and estimate the disturbances needed for active vibration and engine stability control will be highly desirable. If this can be accomplished it will reduce the number of new sensors needed for active control, thus potentially saving millions of dollars.