Electronic angle resolver

Details Electronic angle resolver Electronic angle resolver

1979-12-21

1982-06-15

Ruggiero, Joseph F.

Boots, shoes, and leggings

340347SY, 364603, 364817, G06G 722, G06J 100

Patent

active

043354432

ABSTRACT:
The circuit of the angle resolver compares a first angle to a second angle and produces an output voltage which is an analog representation of the angular difference between the two. One of the angles, which might be a controlled variable is represented by a pair of electrical signals from an electronic compass, for example, which are analog representations of the sine and cosine of the angle. Within the angle resolver circuitry, an analog switch and integrator form an output voltage which is accurately proportional to the sine of the angular difference between the two angles in accordance with: sine (A--B)=(sin A) (cos B)--(cos A) (sin B), where B might be the reference angle, and A, the unknown angle. For cases where A is nearly equal to B, A--B is a small angle, and sin (A--B)=A--B. The values of cos B and sin B are very simply linearly approximated in the present invention by the technique of sampling and integrating the sin A and cos A inputs. By the use of RC differentiators at the sin A and cos A inputs to the circuitry, the errors introduced by the linear approximations of cos B and sin B are compensated to a high degree with minimum cost and complexity.

REFERENCES:
patent: 3464016 (1969-08-01), Kerwin et al.
patent: 3509556 (1970-04-01), Schmidt
patent: 3576986 (1971-05-01), Brickner et al.
patent: 3984672 (1976-10-01), Jones
patent: 4021658 (1977-05-01), Rhodes
patent: 4138729 (1979-02-01), Bayer et al.

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