66 results about "Stall (engine)" patented technology

The invention belongs to the technical field of aero-engine control, and particularly relates to a method and device for judging rotating stall of an aero-gas turbine engine. The method comprises thesteps that whether the engine is in a stopped state or not is obtained; if the engine is in a non-stopped state, the high-pressure conversion rotating speed of the engine is obtained; if the high-pressure conversion rotating speed is larger than a first set value, the outlet static pressure of a gas compressor is obtained, and the change rate of the outlet static pressure of the gas compressor iscalculated; if the change rate of the outlet static pressure of the gas compressor is larger than a second set value, whether the engine is in a restarted state or not is determined; if the engine isin a non-restarted state, the inlet static pressure of a fan is obtained; and the ratio of the outlet static pressure of the gas compressor to the inlet static pressure of the fan is calculated, and if the ratio is smaller than a third set value, that the engine is in a rotating stall state is determined. According to the method and device, the technical problem that the rotating stall cannot be judged in the working process of the engine is solved, the risk of surge is reduced, and the aerodynamic stability and reliability of the engine are improved.

A gas compressor rotation stall early warning method based on a time expansion convolutional network comprises the following steps: firstly, preprocessing dynamic pressure data of an aero-engine, and dividing a test data set and a training data set from experimental data; secondly, sequentially constructing a time convolutional network module, constructing a Resnet-v network module, constructing a time expansion convolutional network prediction model, and storing an optimal prediction model; finally, performing real-time prediction on the test data: firstly, adjusting the data dimension of the test set according to the input requirement of the time convolutional network prediction model; according to a time sequence, calculating a surge prediction probability of each sample through a time expansion convolutional network prediction model; and calculating the real-time surge probability of a pair of samples containing covariables and not containing covariables through a time expansion convolutional network prediction model, and observing the improvement effect of the covariables on the model prediction effect. The time domain statistical characteristics and the change trend are integrated, and the prediction precision is improved; and the active control performance of the engine can be improved, and certain universality is achieved.

The invention relates to the technical field of wind engine stall protection, and discloses a wind engine stall protection device which comprises a shell. A power shaft is movably connected to the middle of the shell, a brake pad is fixedly connected to the outer side of the power shaft, a brake cavity is formed in the inner wall of the middle of the shell, and reset springs are fixedly connectedto the inner wall of the middle of the brake pad. Centrifugal blocks are fixedly connected to the outer sides of the reset springs, and dielectric plates are fixedly connected to the middle inner walls of the centrifugal blocks. According to the wind engine stall protection device, the power shaft drives the brake pad to rotate, the brake pad drives the centrifugal blocks to rotate, and then positive plates, negative plates and the dielectric plates are used in cooperation, so that the effect of controlling on-off of electromagnets is achieved, the dielectric plates in the middles of the centrifugal blocks move along with the centrifugal blocks, the relative area of the positive plates and the negative plates is changed, the voltage between every two pole plates rises, the working voltageof a piezoresistor is reached, and the electromagnets are electrified to generate magnetic force repelling magnetic blocks.

The invention provides an axial flow compressor rotation stall prediction method based on a stacked long short-term memory network, and belongs to the technical field of aero-engine modeling and simulation. The method comprises the following steps: firstly, selecting and preprocessing surge experiment data of a certain type of aero-engine, and dividing the data into a training set and a test set; secondly, building and training a Stacked LSTM model, carrying out the real-time prediction on a test set by utilizing the finally trained model, and giving model loss and evaluation indexes; finally, carrying out real-time prediction on the test data by adopting a Stacked LSTM prediction model, and giving a change trend of the surge probability along with time according to a time sequence. According to the method, the time domain statistical characteristics and the change trend are integrated, and the prediction precision is improved; and the active control performance of the engine can be improved, and certain universality is achieved.

The subject matter of the present disclosure is directed to a turbine engine having an adaptive prognostic health management control system that passively monitors stall margin reductions and applies corrective trims to a power management schedule of the engine to recover operability over time whilst maintaining a sufficient level of stall margin over the life cycle of the engine. The control system can adjust the power management schedule as needed to sustain a target stall margin, which allows for a more optimized and gradual performance to operability trade-off.

The invention discloses an oil supply atomization device, a combustion chamber device and a micro jet engine, and the oil supply atomization device comprises an oil supply ring connected with an oil supply header pipe; and the evaporation pipe comprises a preheating part and an evaporation part, one end of the preheating part is connected with the oil supply ring, the other end of the preheating part is connected with the evaporation part, and the periphery of the preheating part is wrapped with a heat conduction piece. During working, the oil supply main pipe supplies fuel to the oil supply ring, the fuel enters the evaporation pipe from the oil supply ring and firstly enters the preheating part, and the heat conduction piece can quickly transfer heat in the combustion chamber to the fuel entering the preheating part, so that the fuel enters the evaporation part after being quickly preheated and is sprayed out after further heat transfer by the evaporation part; according to the micro jet engine, fuel can be fully preheated before entering the combustion chamber, so that the fuel is fully evaporated, atomized fuel hot steam which is uniformly distributed is formed, the atomization degree of the fuel is high, combustion is more sufficient and stable, the combustion chamber is not prone to stall, and the micro jet engine is not prone to surging, stopping in the air and the like.

Systems and methods are provided for actuating a clutch of a manual transmission of a vehicle comprising. An automatic emergency braking (AEB) system is configured to automatically initiate an AEB event and a brake controller is configured to automatically actuate a braking system of the vehicle. A powertrain controller in is configured to monitor vehicle parameters and determine when an engine ofthe vehicle is nearing stall. A clutch control module is configured to actuate a clutch hydraulic master cylinder and actuate the clutch. A vehicle sensor network is configured to detect objects surrounding the vehicle. The AEB system is configured to initiate the AEB event based on detected objects surrounding the vehicle and, when the AEB event is initiated, instruct the brake controller to automatically actuate the braking system and instruct the clutch control module to actuate the clutch when the vehicle is nearing stall.

The embodiment of the invention discloses a detection device for machine equipment, and the detection device comprises: a current sampling circuit which is electrically connected with a first circuitmodule of the machine equipment, and is used for collecting a current signal of the first circuit module; and the main control circuit that is used for receiving the current signal of the first circuit module and judging that the first circuit module fails when detecting that the current value of the first circuit module exceeds a first set current value. According to the embodiment of the invention, the first circuit module is any one steering engine part of the robot; the detection device collects a current signal of the first circuit module through the current sampling circuit, and then detects the current signal through the main control circuit to judge whether the first circuit module fails or not, that is, whether the robot arm steering engine stalls or not is judged by detecting thecurrent signal of the first circuit module, so that monitoring of stalling abnormality of the arm steering engine is realized.

The disclosure provides a method and a system for purge control. Methods and systems are provided for reducing engine stall incidence during canister purging. A fuel vapor canister is purged at a higher purge ramp rate to an engine with one or more cylinders selectively deactivated. In response to an indication of potential or partial engine stall, the deactivated cylinders are reactivated and thecanister purge ramp rate is lowered.