Abstract: A rotor blade measurement system includes a microwave source and a probe. A directional coupler is attached to the source and the probe. A detector is attached to the directional coupler. The probe directs a microwave signal toward a rotor such that during rotation the rotor blade will pass through the path of the microwave signal. As the rotor blade passes the microwave signal is reflected back to the probe. The directional coupler separates the original microwave signal and the reflected signal. The detector then determines the energy level of the reflected signal. As each rotor blade passes the microwave signal it generates a reflected signal that can be analyzed over time. From the length and shape of the waveform of the reflected signal the amount of twisting and flutter in a rotor blade can be determined.

Abstract: A method and system assembles state transition tables (100) from a plurality of modular sub-tables (102). In one embodiment, each sub-table (102) defines an individual statement in a programming language. Combining multiple sub-tables (102) together into one large table (100) creates a dictionary for a programming language that can be used to, for example, compile code into the programming language or translate code from one language to another. Using sub-tables (102) simplifies construction of the larger table (100) and makes it easier to add, modify, or remove portions of the table (102).

Abstract: A flight control surface actuation system has a plurality of actuators attached to one or more summing levers. Each summing lever has an actuator output point that is attached to the flight control surface. The summing lever position corresponds with a sum of the positions of the actuators attached to it. If one of the actuators jams and becomes immovable, other actuators attached to the same summing lever as the malfunctioning actuator compensates for the malfunctioning actuator to bring the flight control surface to a neutral position. The summing lever makes it possible for flight control surface actuation systems to use actuators other than actuators having a bypass mode or any other features that prevent the actuators from jamming.

Abstract: A flow sensing venturi system includes a venturi body and a manifold mounted thereto. The manifold is thermally isolated from the venturi body. A multiple of sensor ports are formed into the manifold which support each individual sensor and provide communication between the sensor and one or more passageways. The passageways communicate with a single high-pressure and a single low-pressure sense line. The high and low pressure sense line tap respective high and low pressure areas within the venturi body. The sensor is individually screwed into the manifold to provide an airtight connection for two independent sensor input ports. Replacement of individual sensors is thereby greatly simplified.