SIMULATION: Transactions of The Society for Modeling and Simulation International

Brown, Donald

doi: 10.1177/003754977001400201pmid: N/A

Evert, Carl F.

doi: 10.1177/003754977001400202pmid: N/A

Fahrland, David Arthur

doi: 10.1177/003754977001400203pmid: N/A

Tramposch, H.; Jones, H.A.

doi: 10.1177/003754977001400204pmid: N/A

Anderson, Dennis U.; Knopp, Thomas J.; Bassingthwaighte, James B.

doi: 10.1177/003754977001400205pmid: 21423785

The fitting of mathematical models to physiological sys tems can be tedious and difficult, whether one uses analog or digital computer methods. Both methods have their pros and cons depending on the available hardware and software and on the type of modeling. In recent years many digital simulation languages have been written com bining analog-like and digital features to facilitate model ing, but, for a variety of reasons, none of these was suit able for our applications. We, therefore, designed a new digital simulation control system, SIMCON, which is de scribed in this paper.The primary objectives were to provide:(1) Maximum man-machine interaction at run-time, in cluding visual displays, digital control, and both con tinuous analog and digital parameter adjustment(2) The ability to generate solutions and to fit them to experimental data or other theoretical curves with a minimum of computer memory(3) The option to use a mathematically oriented language, FORTRAN, and block operators with variable input/ output.The result is a relatively general and simple simulation system which is easy to use and has wide versatility.

Clemence, C.R.

doi: 10.1177/003754977001400206pmid: N/A

This paper describes a procedure for simulation of digital control systems on an analog computer with digital logic. The digital elements are only those normally provided in the digital panel now available as an optional accessory from most analog computer manufacturers. When used in conjunction with the conventional analog amplifiers and integrators connected as track-hold devices, it is possible to simulate complete systems which include not only the straightforward single-rate system but also those having two or more sampling rates or subsystems, and those having delayed or skip sampling characteristics. The digital logic connections for some simple but typical problems are given and are suggestive of those required for more sophisticated applications.A couple of oscilloscope photographs are included which show the informative presentation which can be obtained with this simulation technique.

Schiesser, W.E.

doi: 10.1177/003754977001400207pmid: N/A

Ross, L.W.

doi: 10.1177/003754977001400208pmid: N/A

Korn, Granino A.

doi: 10.1177/003754977001400210pmid: N/A

Chai, A.S.

doi: 10.1177/003754977001400209pmid: N/A