programming (matching) problem of center of gravity (C.G.) and pressure center (P.C.) for air-air missile directly effect maximum available overload, maneuverability, characteristics of moment of force and scheme and ...
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programming (matching) problem of center of gravity (C.G.) and pressure center (P.C.) for air-air missile directly effect maximum available overload, maneuverability, characteristics of moment of force and scheme and implementation of control system for the missile. The programming criteria were built from various relative consideration, such as aerodynamic properties, flight performance, power plant characteristics and control system design. Available maximum overload estimation was provided, which is used to verify whether design of thrust curve and programming of C.G. and P.C. is reasonable. The design procedure according to programming criteria for C.G. and P.C. was introduced. Design example for wingless trust vector control missile was given, the results have shown that available maximum overload may satisfy requirement of missile maneuver and characteristics of moment of force coincide with design requirement of control system throughout reasonable programming of C.G. and P.C.
In developing object-oriented (OO) software, the first important thing is to identify objects and define the model of communicating relationships between objects. While designing objects the authors again have to anal...
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In developing object-oriented (OO) software, the first important thing is to identify objects and define the model of communicating relationships between objects. While designing objects the authors again have to analyse by what relations the subobjects are connected together. So it is of utmost importance to study the relationships between objects in OO system for finding out object analysing criteria. But up to now it still is a very confusing respect on the naming, definitions and the usage of relations among objects. This paper is for the purpose of discarding the confusion. To this end, a 3-dimensional relation model (3DRM) is suggested. In the 3DRM framework, a series of relations among objects are discussed, and a clear relation hierarchy is performed. Therefore the foundation is established for further study of the OO software development methodology (OOM).
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