Computer-Aided Program Analysis System (CAPAS)

1991 ◽  
Author(s):  
Hiromi Uchimaru ◽  
Minoru Takahashi ◽  
Hirotoshi Tonou ◽  
Hisanori Yasugi
Keyword(s):  
Program Analysis ◽  
Computer Aided ◽  
Analysis System

ELEMENT-FREE METHODS VS. MESH-LESS CAE

2006 ◽  
Vol 03 (04) ◽  
pp. 445-464 ◽  
Author(s):  
HIDEYUKI SAKURAI
Keyword(s):  
Mesh Generation ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Generation Task ◽  
3D Objects ◽  
Computer Aided ◽  
Analysis System ◽  
Mesh Less ◽  
Element Free ◽  
Cae System

Element-free methods (EFreeMs) are expected to eliminate the mesh generation task. However, a computer aided engineering (CAE) system by EFreeM for complex three-dimensional (3D) objects has not yet been developed. This paper discusses the obstacles to the CAE and way to solve them. A 3D groundwater flow analysis system with an EFreeM is presented as a practical CAE. In the system, instead of pursuing mesh-less CAE, a unique mesh is employed to achieve the practical CAE. Some 3D examples show the performance and usefulness of the system. Two serious drawbacks of the EFreeM are also discussed from the viewpoint of the practical CAE.

The Design Of Digital Test Simulator

1992 ◽  
pp. 71-81
Author(s):  
Mohamed Othman ◽  
Bambang Sunaryo Suparjo
Keyword(s):  
Computer Aided Design ◽  
Logic Circuit ◽  
Testability Analysis ◽  
Computer Aided ◽  
Digital Test ◽  
Analysis System ◽  
Aided Design ◽  
Controllability And Observability ◽  
Combinational Logic Circuit ◽  
Pascal Language

Digital Test Simulator is a Computer Aided Design (CAD) tools written in Turbo Pascal language ver. 5.0. It is a gate level simulator to measures the testability values of a combinational logic circuit. It was developed based on the testability analysis system called Computer-Aided MEsurefor LOgic Testability (CAMELOT). The measurement of the testability, controllability and observability for every nodes are based on the topologyical description of the circuit. The final results produced by simulator can be expressed in the form of table and histogram. Comparison of the various nodal testability values allows the areas of poor testability to be readily identified and the inprovement can be done to the circuits to make it more testable. Key Words: Logic circuit; Computer-Aided Design; CAMELOT approach; Digital Test Simulator

scholarly journals Forward kinematic analysis of a 3-RRRS mechanism with subordinate driving variables using a computer-aided geometric method

2019 ◽  
Vol 16 (4) ◽  
pp. 172988141987066
Author(s):  
Liangwen Wang ◽  
Tuanhui Wang ◽  
Fannian Meng ◽  
Wenliao Du ◽  
Caidong Wang ◽  
...  
Keyword(s):  
Analytical Method ◽  
Kinematic Analysis ◽  
Visual Basic ◽  
Geometric Method ◽  
Kinematics Analysis ◽  
Kinematic Chains ◽  
Computer Aided ◽  
Parameterized Model ◽  
Moving Platform ◽  
Analysis System

The 3-RRRS mechanism (RRRS refers to kinematic pairs of a branched chain consisting of three R pairs (Rotational pairs) and one S pair (Spherical pair), successively) is used between a moving platform and a static platform, through which six-dimensional motion of the moving platform relative to the static platform can be achieved. Selecting six independently drivable joints from nine active joints makes it problematic to deal analytically with the kinematics of the 3-RRRS mechanism. In this article, a novel computer-aided geometric method for kinematic analysis is developed. This method can automatically detect the independently drivable joints for arbitrary kinematic chains. This method can be easily implemented compared to the analytical method of the forward kinematics. Based on the constraint relationship of the 3-RRRS mechanism, a general 3-RRRS mechanism digital model is built in the SolidWorks Application Program Interface embedded Visual Basic environment, in which the platform sizes and active driving angles are driven by the parameterized model, to make the moving platform move to the corresponding pose. After the pose of the moving platform is confirmed, the coordinate system is built in a preliminary sketch. The parameters are measured by the SolidWorks measuring functions, and the pose of the moving platform is obtained by combining homogeneous matrices. Using the computer-aided geometric method, the detailed kinematics formula is not required. The accuracy and efficiency of the computer-aided geometric method were assessed with some examples of kinematic analysis for the 3-RRRS mechanism. The results showed that the proposed method obtained competitive precision and calculation time to the analytical method and is beneficial as a convenient solving process. By using Visual Basic programming, a reachable poses analysis of the mechanism can be merged into the kinematics analysis system of the computer-aided geometric method. The computer-aided geometric method could be widely applied to kinematics analysis of mechanisms.

scholarly journals The Computer Aided Fault Tree Modeling and Analysis of the Refrigerator Evaporator Failure

2014 ◽  
Vol 8 (1) ◽  
pp. 26-30 ◽  
Author(s):  
Quanyu Yu ◽  
Jie Liu ◽  
Kangkang Zhang
Keyword(s):  
Qualitative Analysis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Analysis Procedure ◽  
Tree Analysis ◽  
Modeling And Analysis ◽  
Tree Modeling ◽  
Computer Aided ◽  
Analysis System

The paper analyzes the various factors that cause failure of refrigerator evaporator. The refrigerator evaporator failure spectrum is constructed through qualitative analysis of the fault tree system after building a corresponding fault tree system. There is an analysis procedure of fault tree system based on computer aided fault tree analysis system (CAFTA).

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