Advanced Materials Research Vols. 466-467

Abstract: To meet the needs of certain series of airborne electrical accessory test, a set of airborne electrical accessory integrated test system is built. The core of the test system is IPC, the hardware and software adopt modular structure. Based on computer control, database processing, self-identification and security technology, the integration and intelligent on airborne electrical accessory test are realized in system. The application results show that this system can not only improve the efficiency of maintenance support, but also has the further ability of extendibility.

Abstract: To solve fluctuation problem in production plan and scheduling among factories, a logic framework of production dynamic scheduling among factories based on multi-agent technology was constructed. In this framework, the production dynamic scheduling multi-agent negotiation rules and mechanism among factories were established. Furthermore, the production dynamic scheduling multi-agent negotiation procedure among factories was investigated. Finally, the simulation system of production dynamic scheduling among factories based on multi-agent is demonstrated and validated by Flexsim software. It has shown the proposed method can improve the adaptability and stability of production plan and scheduling, and provide a support for optimal and dynamic production plan and scheduling among factories.

Abstract: To satisfy the demand of inlet pressure for air powered engine, it is necessarily to design control valve. The design idea of control valve was proposed, and the models for simulation design were established. These models are air bottle state model, open area model of control valve, spool dynamic model and shape calculation model of characteristic vent. Based on these models, the joint simulation and the experiment test have been done. The result shows that the designed control valve can provide required inlet pressure for air powered engine and satisfy the work demand well. The result of the experiment verifies the rationality and validity of the simulation design, and the method can be used in the design of the congener valve.

Abstract: Technology of computer simulation makes the use of the computer software to simulate of the actual system to obtain data on target behaviors, and fluid simulation software CFdesign is one of computer simulation software. Firstly, this paper gives the reason why it adopts fluid simulation software CFdesign to simulate circulatory system of cold side based on parameters of the simplest thermoelectric conversion system and the comparison of simulation software .Then it introduces circulatory system of cold side on thermoelectric conversion test platform, which utilizes waste heat of automobile exhaust. In order to have a suitable circulatory system of clod side, to build the model of circulatory system of cold side by CATIA, it adopts fluid simulation software CFdesign to access to simulation of temperature field

Abstract: We will propose a kind of new controller for the nonlinear singularly perturbed system with immeasurable states on the basis of the Fuzzy Singularly Perturbed Model (FSPM). An observer is designed to approximate the immeasurable tracking errors. Two-step approach and Schur theory are used to solve Bilinear Matrix Inequation(BMI) to achieve the gains of the controller and the observer. It can make the states of the plant to follow those of the stable reference model. Lyapunov constitute techniques can be used to prove the stability of the closed-loop systems. Finally the simulation is offered to illustrate the effectiveness of the proposed approach.

Abstract: In aircraft flight control law design, the first key is to establish actual aircraft mathematical model, then according to the model of dynamic output information, analysis control law design is appropriate. But in the movement the aircraft is a complex dynamics system, modeling is very complex. This paper firstly carry out comprehensive feasibility analysis, on a plane modeling consideration simplified, secondly, in actual applications verified using the perturbation method of nonlinear equation linearization, establish the plane mathematics model.

Abstract: In this paper, an improved algorithm of general radial basis (RBF) function neural network is introduced, based on improved algorithm, the neural network realized quickly fault diagnosis and self-update of neural network structure, and the neural network is applied to the on-line fault diagnosis expert system. The expert system deals with the fault data that send from on-line monitoring equipment by using neural network, and it can discover the fault type and give reasonable solution by forward reasoning. Meanwhile, the expert system has the ability of achieving new knowledge based on the application of self-update ability of RBF neural network.

Abstract: Aiming at the problems of the anterior cruciate ligament (ACL) reconstruction in knee joint, such as deficiency in effective effect evaluation and insufficiency in operation safety, a zero gravity based force-measuring robot is developed to measure the pre- and post-operative tension of the knee joint ACL. The requirements for the robot's configuration and control are analyzed with regard to the ACL operation environment. Then the mathematical model of the ACL lateral force is deduced. The mechanical configuration and the control system design of the force-measuring robot for knee joint ACL are presented in detail. Lastly, experiments on measuring precision of the displacement and force of the mandrel, and the post-operation evaluation on the ovine bone, are implemented. The results show that the robot is effective for ACL reconstruction evaluation and the mathematics model of ACL forced in lateral direction is valid.

Abstract: This paper presents the development of a simulation environment in Matlab/Simulink for the analysis of the Sub-System of a kind of self-propelled gun and the design of fault tolerant control laws for this configuration. The environment includes the input module, output module and Simulation Nucleus and modeling of several types of engine failure. The simulation environment capable of implementing failure prediction has been implemented successfully as groundwork for analysis of the engine subsystem of self-propelled gun. Preliminary simulation results show the simulation environment is efficient for the Probabilistic neural network. Both abnormal oil pressure and rotate speed failures have been simulated. The simulation environment provides the necessary tools for the development and testing of advanced fault tolerant control laws.