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## What does the differential analyzer do?

The differential analyser is a mechanical analogue computer designed to solve differential equations by integration, using wheel-and-disc mechanisms to perform the integration. Multiplication is just a special case of integration, namely integrating a constant function.

When was differential analyzer invented?

The American electrical engineer Vannevar Bush and others at the Massachusetts Institute of Technology invented the first continuous integraph, later called a differential analyzer, during the early 1930s.

### Why was the differential analyzer important?

Before the invention of digital computers though, differential analyzers allowed mathematicians to make calculations that would not have been practical otherwise. It is hard to see today how a computer made out of anything other than digital circuitry printed in silicon could work.

Who invented differential analyzer?

Vannevar Bush
Harold Locke Hazen
Differential analyser/Inventors

In 1931, Vannevar Bush completed work on his most significant invention, the differential analyzer, a precursor to the modern computer.

## How does a mechanical integrator work?

Mechanical integrators A planimeter is a mechanical device used for calculating the definite integral of a curve given in graphical form, or more generally finding the area of a closed curve. An integraph is used to plot the indefinite integral of a function given in graphical form.

Is Kerrison predictor digital or analog computer?

Kerrison Predictor – Analog computers – Anti-aircraft guns – Artillery components – Artillery operation – Electro-mechanical computers – Military computers – Kerrison Predictor.

### What invention was heavily influenced by the Bush differential analyzer?

While still a professor at MIT, Bush was responsible for the development of the torque amplifier, the mechanism that made it possible to construct an accurate differential analyzer.

What was the first electronic computer?

ENIAC
ENIAC, in full Electronic Numerical Integrator and Computer, the first programmable general-purpose electronic digital computer, built during World War II by the United States.

## What do you mean by hybrid computer?

Hybrid computers are computers that exhibit features of analog computers and digital computers. The digital component normally serves as the controller and provides logical and numerical operations, while the analog component often serves as a solver of differential equations and other mathematically complex equations.

Why is the low pass filter called integrator?

Low Pass Filter as Integrator At low frequencies, the capacitive reactance tends to become infinite and at high frequencies the reactance becomes zero. Hence low pass filter can be said to be worked as an integrator.

### What is difference between ideal and practical integrator?

The practical integrator overcomes the limitations of an ideal integrator that uses a resistor Rf, in parallel with Cf. The basic circuit is shown in figure. A compensating resistor is added to compensate for bias current effects. The resistance Rf reduces the low frequency gain of the op- amp.

Is Planimeter analog or digital?

The digital planimeter is an enhanced version of the classic planimeter which represents an analog system on which petroleum engineer calculates the areas concerned on the same principle ( Figure 2).

## When was the differential analyzer used at MIT?

During the 1930s, Bush continued to develop this device, and many MIT laboratories benefited—including Harold Edgerton’s famous Strobe Lab and George Harrison’s Spectroscopy Lab. During World War II, the Differential Analyzer was used 24 hours a day, especially to help solve problems from the MIT Radiation Laboratory.

How are differential analyzers capable of integrating only one equation?

Source: M. Bowles, IEEE Annals of the History of Computing, vol. 18, no. 4, 1996, p. 6, with permission. An elementary differential analyzer, capable of integrating only one equation, can theoretically be made by having an input table (labeled I in Figure 3), and integrating device (D) and an output table (O).

### What makes a sphere rotate in a differential analyzer?

If the sphere is close to the center of the disk it will rotate very slowly (a small y value), and if near the edge of the disk (a large y value) it will rotate rapidly.