4results about How to "Avoid catastrophic failure" patented technology

The invention discloses a design method capable of giving consideration to both toughening and crack path controllability for a brittle material, and belongs to the technical field of fracture mechanics and artificial intelligence crossing, and the method comprises the steps: employing an input coding method based on space-response double-domain fusion to carry out feature extraction; introducing a channel attention mechanism to perform weighted fusion on the extracted double-domain features, and generating prediction results for different key tasks; evaluating the reliability of a prediction result by adopting a phase field verification and closed-loop adaptive optimization mode, and carrying out iterative training and optimization on the neural network; and taking the optimized neural network as a fitness evaluation function of double-target genetic optimization, and performing multi-target optimization on defect generation parameters. According to the invention, through fusion of the spatial domain and the response domain, geometric morphology and dynamic response characteristics are cooperatively extracted, and the prediction precision of complex fracture behaviors is improved; through non-dominated sorting multi-objective optimization under physical constraints, a high-toughness and path-controllable optimal solution is output, and brittle materials are pushed to cross an active controllable fracture design.

The application provides a method and device for monitoring the running state of a vehicle engine, a controller and a storage medium, wherein the method comprises: acquiring a monitoring signal of the vehicle engine in a running state in real time, performing sliding window slicing and normalization processing on the monitoring signal to generate a window sequence; inputting the window sequence into a trained feature extraction model to output an instantaneous latent vector, the feature extraction model being used to capture subtle changes of early weak faults of the engine in time domain, frequency domain and phase, and the instantaneous latent vector being used to compress and represent the current health state characteristics of the engine; outputting an early fault risk value through an early warning module, and outputting an early warning signal when the continuous multiple early fault risk values are all greater than a dynamic threshold. The application realizes the promotion of the detection granularity from the second-level overall energy to the millisecond-level transient state, greatly reduces the detectable signal-to-noise ratio threshold, and significantly improves the capture ability of early weak faults of the engine.

The application belongs to the technical field of special robots, and particularly relates to a high-integration anti-radiation main-backup redundant collaborative robot joint module, which solves the problem that a collaborative robot joint module cannot normally serve due to various radiation effects caused by ray ionization in a nuclear radiation environment; the joint module is composed of a module integrated by a mechanical structure and a redundant comprehensive electronic circuit system; the redundant comprehensive electronic circuit system comprises a low-voltage power supply system, a servo driving system, a communication system, a sensing and perceiving system, an MCU control system and a constant temperature system, and all of them are integrated with main-backup function modules; the main-backup function modules work independently; the MCU control system detects fault signals of the main-backup modules of each system, and controls automatic switching of the main-backup function modules in each system; the redundant comprehensive electronic circuit system of the application is highly integrated and mechanically and electrically assembled with the mechanical structure inside a joint module shell; the shell is made of radiation-resistant lightweight material, and each system inside the joint has high-integration redundancy, radiation resistance and independence.

The invention relates to the technical field of breather valves, in particular to a breather valve operation monitoring method and system.The breather valve operation monitoring method is characterized in that a pressure sensor and a temperature sensor are arranged on a cavity, and the following core steps are executed: firstly, the current temperature Tn and pressure Pn in the cavity are obtained; secondly, the current ventilation rate is calculated according to the pressure change in the cavity cooling process and compared with the rated ventilation rate, and if the current ventilation rate is lower than a rated value which is equal to the first threshold value k1 or the second threshold value k2, a ventilation valve performance alarm (k1gt, k2) is output; and finally, according to the current temperature Tn, querying a reference pressure-temperature corresponding relation to obtain a standard pressure P0, and if the current pressure Pn is lower than the standard pressure P0 which is equal to a third threshold k3 or a fourth threshold k4 and exceeds a corresponding set time, outputting a ventilation valve state alarm (k3gt, k4). And real-time and accurate diagnosis and early warning of performance degradation and damage faults of the breather valve are realized.