Pogo Suppression on the Delta Vehicle

Abstract

A long succession of Delta vehicles (including their Thor/Delta and Thor/Agena predecessors) have experienced pogo instability in the twenty seconds prior to cutoff of the first stage. The study reported here led to the suppression of this instability on the ITOS-F vehicle launched in November 1973. Suppression was achieved by the addition of flow resistance to an existing accumulator installed in the lox suction line. The ability to achieve the suppression resulted from a joint study by The Aerospace Corporation and McDonnell Douglas Astronautics Corporation. The study was designed to develop a pogo stability model yielding eigenvalues and eigenvectors consistent with flight data over a range of vehicle configurations, engine operating conditions, and presence or absence of a lox accumulator. Extensive reduction of flight data in the form of spectral analyses was required. Based on this model, it was possible to optimize the accumulator resistance for vehicle stability.

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Document Details

Document Type
Technical Report
Publication Date
Jun 07, 1974
Accession Number
AD0784833

Entities

People

  • J. G. Payne
  • S. Rubin

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Astronautics
  • Bulk Modulus
  • Compressive Properties
  • Corporations
  • Data Reduction
  • Eigenvectors
  • Equations
  • Frequency
  • Fuel Pumps
  • Fuel Systems
  • Mathematical Models
  • Propulsion Systems
  • Pumps
  • Resonant Frequency
  • Transfer Functions
  • Vehicles

Readers

  • Combustion and Flow Dynamics.
  • Electrical Engineering
  • Space Exploration and Orbital Mechanics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster