Recursive Data Conversion for PDQ Management

Recursive Data Conversion for PDQ management Catherine Stolyarova CIM department (RK-9) of Bauman Moscow State Technical University [email protected]

The significance of electronic product data in development of the distributed design, production and usage of products in airspace industry, is raising more and more. We mean the product data to be the models in an internal format CAD systems (CAD model). The traditional paper document (both text and graphic) contains only that information that is drawn on a paper and so it can be interpreted always. But such tools as CAD systems, text editors and so on are required for interpretation of the electronic document.

Here are the current core inter-related challenge problems in the field of computer data processing Only integrated data can be stored

Data integration Inter-representation data exchange

Long term data retention

Data quality is vital for data exchange Data quality problems are identified primarily while data exchange Only quality data can be stored

Inter-domain data exchange

Inter-tool data exchange

Data quality

Here are the current core inter-related challenge problems in the field of computer data processing Only integrated data can be stored

Data integration Inter-representation data exchange

Long term data retention

Data quality is vital for data exchange Data quality problems are identified primarily while data exchange Only quality data can be stored

Inter-domain data exchange

Inter-tool data exchange

Data quality

One of arising problems is to ensure the quality of electronic product data. Product Data Quality is defined as absence of specified quality defects, relevant for intending usage of product data. The "Quality Defect" is any feature of product data impeding this usage. The task of data quality ensuring is equally important for: • just created CAD – models • the models created on earlier designed drawings

Method of Recursive Data Conversion

"Recursive data conversion” Level 1 Implies a similar natures of initial model and reconverted model, for example both models are 3-d solid models. Level 2 Can be used for creation of 3d model from 2d drawing with the continuous comparison, ensuring 3d model quality and validity.

Conversion SW -> STEP -> SW

Geometric Validation Properties (GVP) Volume = 2990933071.93 mm3 Surface area = 77312248.21 mm2 Center of gravity: (mm) X = 7696.20 Y = -2417.09 Z = 0.00

Volume = 12608308781.16 mm3 Surface area = 117053267.44 mm2 Center of gravity: (mm) X = 7696.19 Y = -2287.87 Z = 0.00

We can identify problems in the CAD model using recursive data conversion method

Errors of digitalizing identified with Method of Recursive Data Conversion

Original drawing of the body

3D view of error in the CAD model

Drawing generated with 3D CAD model

3D model after fixing of the error

Errors of digitalizing identified with Method of Recursive Data Conversion

2D drawing of the part

3D CAD model created with the drawing

Example of shape deviation

Place with error

The same place after fixing of error with SW. Shape deviation can be observed.

The "recursive data conversion" seems to be quite attractable technology and need of further development of theoretical background and carrying out of research activities.

The "recursive data conversion" seems to be quite attractable technology and need of further development of theoretical background and carrying out of research activities.

Thank You for Your Attention