Study Of Software For Optoelectronic Device Coupling System Simulation And Ptimization

Starting from the practical demand that software has been required for optoelectronic device coupling system designing, Optoelectronic Device Coupling System Simulation and Optimization Softwre (OSSO) has been developed on the base of multibody dynamics, owning the complete intellectual property rights. Further, by using interval analysis , methods for designing and optimizing multibody system have been studied, which makes it become an effective tool for the synthesis of mechanical system. The contents are as follow:(1) The simulation and optimization softwre for optoelectronic device coupling system designing has been developed by employing object-oriented method. The software is written by the standard C++ language. Its main characteristics lie below: from the dimension of system control, the system in this software is apt to expand to electromechanic and control systems by using the constrained modules designed by the observer and the controller (including inter-reaction); the rigid body and the flexible body have been dealt with together; the separation of the interface and implementation has been achieved by the design of framework programming and the extension for implementation has been inherited; the basic calculating steps have been guaranteed by virtual functions, and the other parts of the software have not been altered when expanding the new components.(2) The structure and function of OSSO has been elaborated. In OSSO, inter-graphic environments and part database, constraint database, force database have been employed, the mechanically geometric model with the total parameterization has been established. The solver uses Lagrange equation method of multi-rigid body dynamics to set up the dynamic equation for the system, studying the virtual mechanic system by statics, kinematics and kinetics, and outputing displacement, velocity, acceleration and counterforce curves. The results of simulation can be used in predicting performance of the mechanic system, scope of movement, test for collision, peak load and so on, and they also optimize parameters for the mechanic system.(3) The models of the multibody kinematics and kinetics which is founded on the interval analysis have been studied, and the relevant software has been developed. It includes that the template tetaprogramming technique has been used in the existed multibody system package which is based on the expression template in order to increase the efficiency of calculation greatly; the highly efficient solver of interval linear equations has been developed,by Newton's interval iteration method; the models of the interval analysis of the constraint database have been established, by replacing parts of template parameters with interval number. The parameters have been optimized according to the allowable output by using the interval analysis method.The methods of the multibody dynamics have become an efficient tool for designing parameters of the mechanical system, not merely as the pure analytic tool, which can supply the method for optimizing designing parameters according to the demand of performance for the mechanic design. By using the above package, the problem of the optimization design in the multibody mechanical system has been studied according to index of performance. The methods for designing parameters which optimize 6 freedom parallel mechanism have been realized according to the given positioning accuracy and the demand for the workspace.(4) When optoelectronic devices are aligned, coupling platform is required to the characteristics of multiple degree of freedom, long travel range and high resolution. Guide screw mechanism driven by stepping motor can satisfy the demand of long travel range, while, some factors such as peristaltic creeping and back clearance have the constraint on improvement of resolution. Flexible hinge is like a guide mechanism with a compact structure, a minute extension, a null mechanical friction and a null clearance movement, whose movement caused by the micro-elastic distortion of the hinge has the features of high accuracy and high stability. A platform for optoelectronic devices is developed by the combination of guide screw with flexible hinge, which resolves the contradiction between long travel range and high resolution, achieves optical fiber rough and fine two-step positioning. It shows that, by the theoretical and experimental study, the linear range of the real output displacement is about 90μm, controlled resolution is superior to 0.01μm and positioning accuracy, superior to 0.05μm.