Research On The Theory, Method And Application Of Condition Adaptive Design For Complex Equipment

In order to enhance the adaptability of complex equipment which is under varied conditions, the theory of condition adatptive design for complex equipment is proposed. The architecture of the condition adaptive design is constructed. And four kinds of design methods have been studied, such as the operational condition-drived construction adaptive deformation design method/the characteristics adaptive combination design method of product process quality/the pattern adaptive identification design method for spatial structural strength and the performance adaptive restoration design method under environmental load stress. Combined with some practical projects, the Heduan condition adaptive design integrated system (HD-CADIS) has been developed by applying the condition adaptive design theory and method. The HD-CADIS has been applied in the design process of large-scale forging equipment, and achieved good effect.The organization structure of the full text is as follows:Chapter1gives the reviews of adaptive design included the basic theory and research status. The requirements of condition adaptive design for complex equipment are analyzed, and the shortage of present research for product adaptive design is proposed. Then the research content and architecture of the dissertation is presented.Chapter2constructs the theory architecture of condition adaptive design. From the perspective of complex adaptive system, the concepts of adaptive design such as the main body, dielectric body and adaptation are descripted.4characteristics and3operational mechanisms of the complex adaptive system are analyzed. The technical scheme framework of the condition adaptive design has been proposed.Chapter3proposes the adaptive deformation design method of product construction by using condition profile difference gene model. The product condition profile gene model is constructed by sequential process events and production environmental factors and natural environmental factors. The environmental profile difference gene model is calculated by5kinds of genetic evolution forms such as the loss, increase, recombination of the key chain gene and the loss, increase of the branch chain gene. The master product is selected by comparing design fluctuations. The new product structure is adaptively designed according to the expert system of hydraulic press products/parts environment-function-carrier knowledge. This method improves the reliability of the product design and makes the new products more effectively adapt to the complex condition. Finally, the environmental profile-driven product adaptable design method is applied to a hydraulic machine hydraulic system design process.Chapter4studies the characteristics adaptive combination design method of product quality for processes. The characteristics adaptive combination model of product comprehensive quality for multi-stage process is constructed by analyzing the volatility of quality characteristics of the process. The quality characteristics fusion model of the design and development process is proposed by using the tools of house of quality. The quality characteristics combination model of the trial process is proposed based on the Taguchi Quality Loss Model. The quality characteristics combination model of the run process is proposed based on the Quality-Cost Model. Then the total life cycle-based quality-driven product information model is established, and the qualitative and quantificational analysis is carried on the body part of forging equipment.Chapter5proposes the failure mode adaptive identification design method based on the spatial structure matrix hidden Markov model. The spatial structure strength stability mechanism of machinery and equipment is analyzed. By presenting behavior-structure gene expression and mechanism gene self-correlation matrix, the spatial structure features are described. In order to diagnosis the original mechanical fault, gene adaptive operations are used to separate the mechanical spatial structure into lots of HMMs, and the HMM parameters algorithm is combined with mechanism-statue gene expression operations to diagnose and debug the original mechanical fault quickly. By diagnosis mechanical spatial structure isolating, the improved model is closer to the actual situation and the computational efficiency is increased. The failure mode adaptive identification model is validated by a large scale forging equipment and the result is effective.Chapter6proposes the performance adaptive restoration design method based on the environmental load stress respond. The environmental factors of the operation system are researched as objects. Firstly, fault condition mechanism of the equipment is studied. Secondly, the system performances are analyzed with the environmental stress factors such as the temperature, the humidity, the vibration and so on. Then the environmental stress response model for the environmentally sensitive system is presented. The system performance reduces into a potential fault condition under the environmental stress. The model monitors environmental factors by the sensors and constructs a transcription factor array and a corresponding state enzyme array based on the monitoring data. The transcription factor array controls the environmental repair program while the state enzyme array controls the degree. Then the model prevents the potential failure turning to the functional failure and ensures the system performance during the normal operation. Finally through simulating the forging process, it verifies that the method is effective.Chapter7develops the HeDuan condition adaptive design integration system (HD-CADIS) with the practical project. The application and implementation in the digital design of complex forging equipment have proved the validity and feasibility of the proposed methods in this dissertation.Chapter8summarizes the dissertation and prospects the future research work.