4 results about "Functional decomposition" patented technology

The application discloses a kind of based on MBSE joint simulation technology's cabin ventilation system design method, first obtain the heat and air consumption parameter of ship cabin equipment, synchronization to the SysML system model based on MBSE construction;System function and performance requirement are analyzed by requirement modeling, and parameter modeling obtains the ventilation and cabin target environment parameter requirement;Design system physical architecture, complete function decomposition and sub-equipment distribution, and the architecture feasibility is verified by function simulation;Performance simulation model is constructed, and the optimal scheme is selected by simulating actual working condition, and the performance feasibility is verified by long-time simulation;Finally complete system three-dimensional digital design and space arrangement, and complete design after verifying space feasibility.The application realizes cabin ventilation system whole-process model-driven design, significantly improves design efficiency and reliability, reduces design rework risk.

This invention discloses a fatigue state evaluation system and method for unmanned aerial vehicle (UAV) operators. It employs a strategy combining functional decomposition and task orientation to construct a hierarchical evaluation system encompassing four dimensions: eye-tracking perception, cognitive integration and attention allocation, task-related eye-tracking performance, and eye-tracking-fatigue iterative learning and adaptation. This system is quantitatively represented through 36 underlying indicators. A task-situation gating weighting model based on a normal cloud model and Shapley value game is constructed. Expert verbal ratings are converted into cloud drops to retain fuzziness and randomness. Shapley values ​​are used to eliminate redundant indicator coupling, and subjective and objective weights are dynamically integrated through task-situation gating factors. This invention can accurately quantify operator fatigue state in conjunction with task context, solving the problem that traditional static evaluation is difficult to adapt to dynamic environments and individual differences. It improves the robustness and accuracy of UAV inspection personnel status assessment and has strong applicability.

This invention relates to the field of reliability engineering technology, specifically to a method and system for allocating certainty reliability indicators for an electrically driven turnout tamping machine based on a material-energy-information network. The method first performs functional decomposition and performance analysis of the entire machine, extracting key performance parameters of each subsystem and constructing performance margins. Based on certainty reliability theory, it determines the material-related reliability. Secondly, it establishes energy and information networks through the electric traction power supply relationship and the telemetry and control link, respectively, calculating the energy-related reliability and information-related reliability of each subsystem, and combining these three to obtain the subsystem functional reliability. Based on this, the system reliability is expressed as the minimum value of the subsystem functional reliability. System reliability interval constraints and performance margin mean and variance constraints are introduced to construct an optimization model with causal importance-weighted subsystem functional reliability as the objective function. An intelligent optimization algorithm is used to solve for the reliability indicators and margin allocation of each subsystem. This method can achieve refined and quantitative allocation of reliability indicators for each subsystem of an electrically driven turnout tamping machine under small sample and uncertain conditions, improving the reliability and safety of the entire machine under complex operating conditions.

A method and an apparatus for generating conceptual design for mobility apparatus. The method includes: generating problem definition data according to a requirement specification of a user; generating function data according to functional decomposition for each aircraft mission based on the requirement specification and the problem definition data; extracting element data of a main configuration of the aircraft based on design concept data searched for based on the required function data and databased external data; and generating matrix data having airframe configuration data of the aircraft based on a combination of the element data of the main configuration.