In order to obtain an optimal performance of a ship controlled by a helmsman, the dynamics of the ship as well as those of the helmsman must be known. This paper deals with the description of a simulated ship-helmsman system. In particular the simulation of the helmsman by a nonlinear...

After having introduced in a simplified way the R-C-circuit-heat conduction analogy in one- and two-dimensional problems, the influence of variable properties is added to the electrical set-up.

Optimal control theory based on Pontryagin's minimum principle has been applied to the problem of specifying the best combination of minimum percent BOD waste treatment and effluent distribution policies for a single plant on a specified polluted river segment. The simulation analysis features a...

From a mathematical standpoint, numerical methods can be divided in two classes: (i) Direct methods, which give an exact result after some finite number of computations, and (ii) approximate methods, which only give an approximate result after any finite number of computations.

A new simple electronic multiplier achieves a static accuracy of 0.1 percent of full scale at extraordinarly low cost: only two d-c amplifiers sharing a common chopper are required, and a single two-tube triangle generator suffice for several multpliers. A new precision limiter circuit developed...

The succession of digital program steps in typical hybrid analog digital computer simulations is so similar to the stepwise solution of differential-equation systems that well-established continuoussystem-simulation languages, and especially interactive digital simulation systems, can serve as...

Transfer functions are an aid in the analysis of many linear systems. This paper presents an application of the Matric Computor, a revolutionary new analytic computing device, to the solution of certain problems described by transfer functions, with examples.

A method for the hybrid computer solution of the Cauchy problem for a general first order partial differential equation is presented. The method is based on the well known theory of characteristics and the solution is obtained by generating the characteristic curves of the partial differential...