BS 7285(1990) : 1990

Superseded

View Superseded by

METHOD FOR DESCRIBING CHARACTERISTICS OF SERVO-HYDRAULIC TEST EQUIPMENT FOR GENERATING VIBRATION

Available format(s)

Hardcopy , PDF

Superseded date

28-02-2017

Language(s)

English

Published date

01-01-1990

Publisher

British Standards Institution

Committees responsible
National foreword
Method
0. Introduction
1. Scope and field of application
2. References
3. Symbols
4. Units
5. Definitions
6. Characteristics to be supplied by the manufacturer
7. Hydraulic vibration generators
8. Control system
9. Hydraulic power system
10. Hydraulic vibration generator system
Annexes
A. Schematic diagrams
B. Methods for measuring or calculating various
     hydraulic vibration generator parameters
C. Selection of test mass
D. Servovalve control device
Tables
1. Values for displacement and acceleration PSDs
2. Vibration generator
3. Control system
4. Hydraulic power system
5. Complete hydraulic vibration generator system
6. Initial mode for a homogeneous test mass
Figures
1. Total distortion at a fixed frequency as a function
     of the acceleration
2. Total distortion as a function of the frequency at
     maximum acceleration for a given test mass
3. Example of system and single hydraulic stage
     servovalve drive requirements
4. Examples of rated sinusoidal characteristics
5. Example of a power spectral density acceleration
     (PSDa) profile
6. Schematic diagram of hydraulic test equipment for
     generating vibrations
7. Hydraulic linear vibration generator
8. Schematic diagram of a hydraulic power system
9. Boundary area defining values of D and L for
     different maximum operating frequencies
10. Typical servovalve control system block diagram

Hydraulic test equipment used for generating vibration has a wide range of characteristics. This standard establishes a list of the characteristics and the standard method of obtaining certain of these characteristics. Applies to hydraulic vibration generators, the servovalve control devices, the hydraulic power systems and the complete hydraulic vibration generator systems. Covers introduction, references, symbols, units, definitions, characteristics to be supplied by the manufacturer, hydraulic vibration generators, control system, hydraulic power system, hydraulic vibration generator system, schematic diagrams, methods for measuring or calculating various hydraulic vibration generator parameters, selection of test mass and servovalve control device.

Committee	GME/21
DevelopmentNote	Supersedes 87/70661 DC (09/2005)
DocumentType	Standard
Pages	46
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS ISO 8626 : 1989

BS 6140-2:1982	Test equipment for generating vibration. Methods of describing characteristics of auxiliary tables for test equipment for generating vibration
BS 3015:1976	Glossary of terms relating to mechanical vibration and shock
BS 4196-6:1981	Sound power levels of noise sources Survey method for determination of sound power levels of noise sources
BS 4575-1:1979	Fluid power transmission and control systems Guide for hydraulic equipment and systems