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Aug 2, 2013
08/13

by
Schoenwetter, Howard K.; Flach, D. R.; Souders, T. M.; Bell, B. A.

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Topic: Function generators (Electronic instruments)--Testing.

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Topics: Machinery, Kinematics of, Function generators (Electronic instruments)

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551

Jun 27, 2010
06/10

by
Admire, J. R

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Rayleigh-Ritz iterative solution technique for structural modal response analysis under static loads using IBM 7094 computer

Topics: FUNCTION GENERATORS, POTENTIOMETERS (INSTRUMENTS), SERVOMECHANISMS, ERROR SIGNALS

Solid-state logarithmic-function generator is compact and provides improved accuracy. Generator includes a stable multivibrator feeding into RC circuit. Resulting exponentially decaying voltage is compared with input signal. Generator output is proportional to time required for exponential voltage to decay from preset reference level to level of input signal.

Topics: NASA Technical Reports Server (NTRS), FUNCTION GENERATORS, LOGARITHMS, SOLID STATE DEVICES, Caron,...

Apparatus and technique for generating logical functions and circuits have been developed. They provide aid in designing and constructing hardware to generate logic circuits, by defining circuit connections required to generate these functions. With this method, it is possible quickly and automatically to design logic, while eliminating involved and time-consuming mathematical manipulations.

Topics: NASA Technical Reports Server (NTRS), FUNCTION GENERATORS, LOGIC CIRCUITS, LOGIC DESIGN,...

A tangent function generator is provided which utilizes input signals proportionate to the sine and cosine of a given angle. The equipment accomplishes a trigonometric manipulation which forms an output signal substantially independent of the input reference voltage but proportional to the tangent of the angle. The device uses a multiplier and operational amplifier.

Topics: NASA Technical Reports Server (NTRS), FUNCTION GENERATORS, INTEGRATED CIRCUITS, TANGENTS,...

An electromechanical device for generating both sine and cosine functions is described. A motor rotates a cylinder about an axis parallel to and a slight distance from the central axis of the cylinder. Two noncontacting displacement sensing devices are placed ninety degrees apart, equal distances from the axis of rotation of the cylinder and short distances above the surface of cylinder. Each of these sensing devices produces an electrical signal proportional to the distance that it is away...

Topics: NASA Technical Reports Server (NTRS), COSINE SERIES, ELECTROMECHANICAL DEVICES, FUNCTION...

Solid State Ci-150 analog computer - Comcor, Inc.

Topics: solid, analog, diode, potentiometer, function, panel, meter, generators, amplifier, volt, diode...

Producing seamless tiled images from multiple displays includes measuring a luminance profile of each of the displays, computing a desired luminance profile for each of the displays, and determining a spatial gradient profile of each of the displays based on the measured luminance profile and the computed desired luminance profile. The determined spatial gradient profile is applied to a spatial filter to be inserted into each of the displays to produce the seamless tiled display image.

Topics: NASA Technical Reports Server (NTRS), DISPLAY DEVICES, FUNCTION GENERATORS, LUMINANCE, SPATIAL...

Discrete/Continuous (D/C) control theory is a new generalized theory of discrete-time control that expands the concept of conventional (exact) discrete-time control to create a framework for design and implementation of discretetime control systems that include a continuous-time command function generator so that actuator commands need not be constant between control decisions, but can be more generally defined and implemented as functions that vary with time across sample period. Because the...

Topics: NASA Technical Reports Server (NTRS), ALGORITHMS, CONTROL THEORY, CONVOLUTION INTEGRALS, KERNEL...

The ability of the Ramp Generator to output linear ramp function stimuli to the space shuttle aerosurfaces is determined. Recommendations are included.

Topics: NASA Technical Reports Server (NTRS), AVIONICS, COMPUTER PROGRAMS, FUNCTION GENERATORS,...

Analog Hybrid, Ci-5000 computer- Comcor, Inc. 1964

Topics: digital, analog, servo, solid, function, diode, comcor, hybrid, control, logic, servo set, diode...

In this paper a simple, inexpensive, membership function circuit for fuzzy controllers is presented. The proposed circuit may be used to generate a general trapezoidal membership function. The slope and horizontal shift are fully programmable parameters.

Topics: NASA Technical Reports Server (NTRS), FUNCTION GENERATORS, COMPUTERIZED SIMULATION, LOGIC CIRCUITS,...

A simple highly flexible device for synthesizing complex vibration mode patterns is described. These mode patterns can be used to identify vibration mode data. This device sums selected sine and cosine functions and then plots the sum against a linear function.

Topics: NASA Technical Reports Server (NTRS), COSINE SERIES, FUNCTION GENERATORS, SINE SERIES, VIBRATION...

A prototype controller for the ESTAR (electronically scanned thinned array radiometer) instrument has been designed and tested. It manages the operation of the digital data subsystem (DDS) and its communication with the Small Explorer data system (SEDS). Among the data processing tasks that it coordinates are FEM data acquisition, noise removal, phase alignment and correlation. Its control functions include instrument calibration and testing of two critical subsystems, the output data formatter...

Topics: NASA Technical Reports Server (NTRS), CONTROLLERS, DATA PROCESSING, DATA SYSTEMS, RADIOMETERS,...

AD-2-24PB analog computer - Applied Dynamics

Topics: diode, model, repetitive, patchboard, amplifiers, generators, color, mfd, function, integrator,...

R&D Report 1972-29 : The feasibility of correcting for failure of constant luminance in a colour television system D.T. Wright In a colour television transmission system such as the PAL system a constant-luminance failure is caused because the red, green and blue separation signals used to form the chrominance and luminance signals are not linearly related to the light outputs required from the red, green and blue display picture-tube phosphors. As a result, not all of the displayed picture...

Topics: luminance, signal, correction, colour, saturated, corrected, displayed, signals, frequencies,...

The NASA Langley Research Center (LaRC) Cockpit Motion Facility (CMF) motion base has provided many design and analysis challenges. In the process of addressing these challenges, a comprehensive suite of software tools was developed. The software tools development began with a detailed MATLAB/Simulink model of the motion base which was used primarily for safety loads prediction, design of the closed loop compensator and development of the motion base safety systems1. A Simulink model of the...

Topics: NASA Technical Reports Server (NTRS), COCKPITS, COMPUTERIZED SIMULATION, SOFTWARE DEVELOPMENT...

A submillimeter wave-generating integrated circuit includes an array of N photoconductive switches biased across a common voltage source and an optical path difference from a common optical pulse of repetition rate f sub 0 providing a different optical delay to each of the switches. In one embodiment, each incoming pulse is applied to successive ones of the N switches with successive delays. The N switches are spaced apart with a suitable switch-to-switch spacing so as to generate at the output...

Topics: NASA Technical Reports Server (NTRS), FUNCTION GENERATORS, INTEGRATED CIRCUITS, MICROWAVE...

From the bitsavers.org collection, a scanned-in computer-related document. eai :: 16-231R-V :: Information Manual for the EAI 231R-V Analog Computing System Aug64

Topics: analog, mode, computing, eai, logic, patching, computer, function, electronic, input, analog...

Materials handling equipment - Rushmore & Weber Inc.

Topics: music, musical, harmonic, harmonics, cahill, sine, wave, electrical, function, electronic, function...

Exact Electronics Function Generations Flyers (200 Series, Type 301, Type 255)

Topics: output, ramp, waveform, generator, outputs, frequency, main, amplitude, sine, function, main...

Methods are presented for the generation of random numbers with uniform and normal distributions. Subprogram listings of Fortran generators for the Univac 1108, SDS 930, and CDC 3200 digital computers are also included. The generators are of the mixed multiplicative type, and the mathematical method employed is that of Marsaglia and Bray.

Topics: NASA Technical Reports Server (NTRS), CDC 3200 COMPUTER, COMPUTER PROGRAMS, NUMERICAL ANALYSIS,...

Applied Dynamics, products and services

Topics: diode, hybrid, logic, amplifiers, function, analog, dfg, generators, dynamics, computer, diode...

EAI 231R-V analog computer, information manual

Topics: analog, mode, computing, eai, logic, patching, electronic, function, computer, input, analog...

From the bitsavers.org collection, a scanned-in computer-related document. wavetek :: FunctionGenBroch 60s

Topics: frequency, model, vcg, output, models, wavetek, khz, rack, generator, amplitude, rack mount,...

A prototype Walsh Function Generator (WFG) for the ESTAR (Electronically Scanned Thinned Array Radiometer) instrument has been designed and tested. Implemented in a single Xilinx XC3020PC68-50 Field Programmable Gate Array (FPGA), it generates a user-programmable set of 32 consecutive Walsh Functions for noise cancellation in the analog circuitry of the Front-End Modules (FEM's). It is implemented in a 68-pin plastic leaded chip carrier (PLCC) package, is fully testable, and can be used for...

Topics: NASA Technical Reports Server (NTRS), AIRBORNE/SPACEBORNE COMPUTERS, ARRAYS, DATA SYSTEMS, FUNCTION...

This paper is a hardware description manual for the Dynamic Stability Instrumentation System that is used in specific NASA Langley wind tunnels. The instrumentation system performs either a synchronous demodulation or a fast Fourier transform on dynamic balance strain gage signals, and ultimately computes aerodynamic coefficients. The DSIS consists of a double rack of instruments, a remote motor-generator set, two special stings each with motor driven shafts, and specially designed balances....

Topics: NASA Technical Reports Server (NTRS), AERODYNAMIC COEFFICIENTS, DATA ACQUISITION, DYNAMIC...