Abstract: Method of analysis text message syntactically and by content, which entails: step 1; Split syntaxes (made available to subscribers by the network operator) into tokens to store in a Syntax Trie; step 2. Pre-process an incoming text from a subscriber; step 3. Split the text (pre-processed in Step 2) into tokens; step 4. Look up paths that include the tokens (obtained in Step 3) in the Syntax Trie (initialized in Step 1); step 5: Return the look-up result, which is the path in the Syntax Trie that best reflects the user intent.

Abstract: The present invention provides a closed-loop control method for an electronic fuel injection piston-engine on an unmanned aircraft consisting of the following steps: determination of a set of control coefficients; preliminary determination of fuel injection flow; determination of the injection limit; determination of the actual injectable value; perform fuel injection; the opening of the air intake valve is controlled to ensure that the fuel-air ratio always remains within a specified range. The present invention also provides a method for modeling the operation of an engine at each operating range. In addition, the method of physically simulating the operating conditions according to the pressure ranges of the engine is also proposed. The simulation method to find the control coefficients corresponding to each operating model of the engine is presented, the fuel injection closed-loop control structure is built on a control simulation software.

Abstract: A system and method for controlling gas turbine engines with maximum thrust of less than 500 kgf. The control system includes electronic control unit (“ECU”), sensors and actuators. To ensure the requirement of compactness, physical control system simplicity but maintain stability and accurate operation for the engine, the control system does not include components such as Fuel Control Unit (“FCU”), alternator and corresponding rectifier circuits. A sensor, instead of alternator's wave form signal, is used to detect the rotational speed of the engine. Voltage regulation into the electric motor driving the fuel pump controls fuel flow, instead of the FCU. The control method consists of upper and lower limits computation calculation blocks of the control signal, and PID control algorithm block with coefficients designed to be suitable for the engine operating ranges. Control is implemented through a 7-step calculation process. Piecewise linearization modeling and tuning PID coefficients is also presented.