Linear control analysis on a PC

Article Abstract:

Caplin Software's Caplin linear control analysis program for IBM PCs and compatibles is based on the classic LCAP2 developed by Aerospace Corp for analysis of space launch vehicles on mainframe computers. The $195 program ($49 for students) analyzes single-input/single-output (SISO) linear control systems interactively using transforms; among the classical analysis tools included are frequency response, sampled-data transforms and multirate sampled-data transforms, digital filter transformations using the Tustin, prewarped Tustin and matched pole-zero approximations, and root solving and root locus. The program handles only transfer functions or polynomials of degree 30, 999 polynomials or transfer functions, 25 continuous blocks, 20 discrete time blocks and five zero order holds. Caplin lacks some useful but non-critical functions, but it is highly recommended for its technical capabilities at such a low price.

Product information, Computer aided engineering, Mathematical software, Statistical software, Control systems, Evaluation, Software Packages, Statistical/Mathematical Software, Scientific Research, Linearization, Computer-Aided Engineering, Caplin Software, Caplin (Mathematical software)

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Editing made easy

Article Abstract:

The object linking and embedding (OLE) capabilities that Microsoft Corp is adding to its Windows graphical user interface (GUI) will make it much easier to edit and revise documents. OLE enables segments of documents to be treated as objects. This includes creating a pictorial description of the segment in the device-independent Metafile format and employing extended Windows dynamic-link library functions to enable applications to utilize objects at a high level. Other capabilities of OLE-based Windows include faster scrolling and the ability to select, edit and save graphical or spreadsheet segments in their native format from within a document.

Product development, Microsoft Corp., MSFT, Word processing software, Product introduction, Object oriented programming, New Technique, Enhancements, Windowing, Object-Oriented Programming, Microsoft Windows 3.0 (GUI)

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