Program simulation system including means for ensuring interacti

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Details

364300, G06F 1520

Patent

active

046775870

ABSTRACT:
An interactive simulation system for simulating an analog or a digital system defined by mathematical model representing the operation of the system. The mathematical model is represented by a network of function blocks specified by an operator, each function block providing an output corresponding to a primitive mathematical or logical operation on an input. The system iteratively steps through the network to simulate the system at sequential points in time. At least some of the function blocks represent delay functions in which their outputs are in response to the inputs during the previous iteration. The simulation system first receives from an operator the identification of the function blocks to be used in the network, the function blocks being entered from the input of the network to the output, except that any delay blocks are entered last. The system requests the operator to provide an identification of the connections to the inputs of each block, the system requesting each block's inputs in the order in which the blocks were entered and not stepping to the next until all of the inputs have been entered. When each block's input connections are entered, the system determines whether the input is provided by a previously entered block or by a block having a delay function. The system thus ensures that all of the inputs of all of the blocks are connected and that no zero-delay loops are present.

REFERENCES:
patent: 4386403 (1983-05-01), Hsieh et al.

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