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Telemetry and Remote Control, IRE Transactions on

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Includes the top 50 most frequently downloaded documents for this publication according to the most recent monthly usage statistics.
  • 1. Telemetering system for the X-17 missile

    Publication Year: 1957 , Page(s): 1 - 14
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    This paper describes the circuits, components and packaging of a high performance airborne six-channel FM/FM telemetering system developed by the Lockheed Missile Systems Division for use in the Air Force X-17 Missile Program. The package, weighing 31–1/2 pounds and measuring 8 inches in diameter by 14 inches long obtains highly accurate information under the severe environmental conditions encountered by a hypersonic ballistic missile. By utilizing time division multiplexing on four channels, 79 quantities are measured. A bridge-modulated subcarrier oscillator permits the use of variable reluctance transducers on commutated channels. Where possible, plug-in components were reduced in size by transistorization, printed wiring boards, and encapsulation techniques. The antenna coupling device is a radial folded cavity which carries the full structural load, and permits excitation of longitudinal r-f currents on the surface of the vehicle. The philosophy and techniques associated with the development and application of this system resulted in many useful features providing exceptionally high information capacity, accuracy, reliability, and versatility. View full abstract»

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  • 2. Telemetering receiving system at the Air Force Missile Test Center

    Publication Year: 1957 , Page(s): 6 - 9
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    The receiving system used at the Missile Test Range in Florida and the West Indies is described. An over-all picture of the radio-telemetering ground receiving equipment is offered including the antennas, rf distribution facilities, and demodulation equipment. Several units of this system have been developed expressly for use at the Air Force Missile Test Center (AFMTC). The requirements leading to the design, along with the performance capabilities and operational utilization of the equipment are discussed. Some significant test results are outlined, and the current methods of testing the receiving system is presented. View full abstract»

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  • 3. Telemetering receiving system at the air force missile test center

    Publication Year: 1957 , Page(s): 1
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (82 KB)  

    The receiving system used at the missile test range in Florida and the West Indies is described. An overall picture of the radio — telemetering ground receiving equipment is offered including the antennas, r-f distribution facilities, and demodulation equipment. Several units of this system have been developed expressly for use at the AFMTC. The requirements leading to the design, along with the performance capabilities and operational utilization of the equipment are discussed. Some significant test results are outlined, and the current methods of testing the receiving system is presented. View full abstract»

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  • 4. Function generation on the differential analyzer extended to the analog computer

    Publication Year: 1955 , Page(s): 8 - 12
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    This paper discusses the technique of “generating” certain analytically-defined mathematical functions by continuously solving a differential equation having the desired function as solution. This principle was first applied to the mechanical differential analyzer, described in the first section. The characteristics of the differential analyzer and the electrical analog computer are compared, and extension of this function generating scheme to the latter machine is discussed. Methods are described for determining a differential equation yielding a given function as its solution. Finally, experimental results obtained on an analog computer are described. View full abstract»

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  • 5. Application of the phase-locked loop to telemetry as a discriminator or tracking filter

    Publication Year: 1958 , Page(s): 20 - 35
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    This paper studies a system of FM detection suggested by work done in optimum-demodulation theory, and a summary of the problems of ordinary discriminators is made so that possible improvement may be demonstrated readily. This summary points out an important defect of FM discriminators which affects the data accuracy of the telemeter but which is rarely recognized. The system study deals with generalized optimum filtering for transient signals applicable to commutated signals and operators such as discrimination. The solution for particular applications with respect to the phase-locked loop or optimum-demodulation system is offered. With these applications available, noise and transient signals are studied to see how the system fits the practical system. Normalized charts are made which may be applied to any standard telemetering channel that may be designed. A comparison of this system with ordinary discriminators shows a large threshold improvement and a reduction in over-all system error. Graphs of the comparison of these effects are also included. Heuristic suggestions of application are offered for further study. View full abstract»

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  • 6. PDM-PAM conversion system

    Publication Year: 1957 , Page(s): 1 - 11
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    The requirements and methods for changing pulse amplitude modulation to pulse duration modulation are met by a PDM to PAM Converter. This unit functions over a wide range of input signals and can include, if desired, servo correction of zero and full scale references. As part of an integrated system, the converter is augmented with an all electronic commutator simulator, gate generators, and patching facilities. The converter features provisions for switching in the absence of up to five information channels, protection against generation of false master pulses, and a compensated duty-cycle circuit. View full abstract»

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  • 7. Low level transistorized chopper amplifier

    Publication Year: 1957 , Page(s): 1 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (6740 KB)  

    Low-level transistorized chopper amplifiers have been constructed for a specific missile application. With minor modifications, these amplifiers can meet the requirements for general usage. The chopper is capable of processing 900 signals per second at a common mode rejection of 1000:1. The gain is smoothly adjustable ± 20 percent of full scale and the output is linear within 1 percent of a straight line drawn between the end points. Operation is consistent over a temperature range of +40°F to 165°F with less than 10 percent variation in gain. The amplifier's rise time is less than 300 microseconds. Input impedance is 25 k or better and output impedance is 5 k or less. Ripple is less than 10 millivolts peak. View full abstract»

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  • 8. A new transistor-magnetic FM/FM subcarrier discriminator

    Publication Year: 1957 , Page(s): 1 - 9
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    Recently there has been sane interest in a phased-locked loop to replace the bandpass filter in the demodulator section of telemetering systems. Carl Gilchrist of the Jet Propulsion Laboratory of the California Institute of Technology has-done some very interesting work with such loops. The techniques applied by Richman in the development of his “quadricorrelator” scheme are also of interest here3. His article appears in the January 1954 Proceedings of the IRE. View full abstract»

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  • 9. A solid-state pulse-width modulator

    Publication Year: 1957 , Page(s): 1 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (880 KB)  

    In conjunction with a program to investigate circuit techniques applicable to digital data reduction systems, various transistor-magnetic circuit combinations have been investigated. In such circuits the transistor is used as a switch1, 2 and the square loop magnetic material3 is switched between opposite saturated states. These transistor-magnetic (Tramag) techniques have been used to produce circuits to obtain a pulse-width or frequency output directly proportional to the applied input voltage. View full abstract»

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  • 10. High-speed high-accuracy multiplexing of analog signals for use in digital systems

    Publication Year: 1957 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (620 KB)  

    The past few years have seen rapid strides in the understanding and use of digital systems. In the field of telemetry, pulse code modulation systems have been developed and tested with excellent results. An airborne PCM system is made up of the analog pickup devices, a switch or multiplexer for sampling more than one channel, an analog-to-digital converter, and an rf transmitter. The objective of this paper is to describe the multiplexing function. First, some of the necessary characteristics unique to PCM are described, followed by a description of a multiplexer that meets these requirements, and finally, a transistorized multiplexer that includes further refinements. View full abstract»

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Aims & Scope

This Transactions ceased publication in 1958. The new retitled publication is IEEE Transactions on Aerospace and Electronic Systems.

Full Aims & Scope