Suspension systems for ground testing large space structures

  • 101 Pages
  • 2.74 MB
  • English

National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, For sale by the National Technical Information Service] , [Washington, D.C.], [Springfield, VA
Large space structures (Astronautics), Space vehicles -- Vibration -- Testing -- Equipment and supplies, Springs (Mecha
StatementRonald R. Gold ... [et al.].
SeriesNASA contractor report -- 4325., NASA contractor report -- NASA CR-4325.
ContributionsGold, Ronald R., Langley Research Center.
The Physical Object
Paginationx, 101 p.
ID Numbers
Open LibraryOL17633252M

Format: Book, Government Document, EBook; LOC call number: TLC6 A3 no ; Published: Washington, D.C.: National Aeronautics and Space Administration. For ground testing of controlled flexible space structures an active suspension design is proposed to eliminate dynamic reaction forces from the suspension cables.

Abstract: The purpose of this article is to present the process of design and simulation, design, and testing of a Rocker-Bogie-like suspension system, for use in an all-terrain electric wheelchair. This suspension is a base of a six-wheel remote-controlled platform adapted to the rough-terrain conditions.

The first stage of the designing process is to create a CAD model and perform the. to simulate ground-based validation testing for flexible space structures. A suspension system based on a concatenation of two four-bar parallelogram linkages to simulate a zero-gravity environment for the flexible space structures on the ground, has been developed.

Three dynamic models are presented: a flexible two-beamstructure in space, a. Dynamics and control of a large displacement suspension system for ground testing of flexible space structures. By Mercedes C. Reaves, As the development in flexible space structures expands, the need for an efficient and accurate suspension system for ground tests increases accordingly.

In this article, a disk suspension system was developed. design,and optimization of suspension system. Study of existing suspension systems and parameters affecting its performance.

Determination of design parameters for suspension system. SUSPENSION SYSTEM The suspension of vehicles needs to satisfy a number of requirements which depend on different operating conditions of the vehicle.

This chapter investigates the properties and use of tensile fabric and suspension structures in buildings with initial references to bridges which are more commonly associated with this form of structure. The starting principle of catenary action and resolution of a suspension bridge cable forces is followed the example of a real stadium roof.

Suspension Systems products. Ceiling System - Radians® – Curving Modular Panels USG Ceilings Metal Ceilings - Stretch Metal Planks Hunter Douglas Architectural (Europe).

Portable Life Support Systems EVA Systems Testing Overview The Johnson Space Center (JSC) is uniquely positioned to provide engineering design, development, and testing for spaceflight vehicles and systems.

Capability is available in the areas of human space vehicle systems, life support systems and environmental control, flight. Dependent Suspension Systems This type of suspension acts as a rigid structure in which any movement of one wheel is transmitted to the other wheel as well, in the rear or the front.

The force is also transmitted from one wheel to the other. It is mainly used in heavy vehicles. Examples are Leaf Spring Suspension, Watt’s Linkage etc. [9] B. first person that used a spring in the suspension system of a vehicle, and Mors of Paris first fitted a suspension system with shock absorbers in Today, there are many kinds of suspension systems with complex structures and elements, some of which will be discussed here.

Figure I Early form of suspension systems for horse-drawn carts.

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signal or ground reference plane as well as grounding topologies to achieve electric safety and good performance of the system, are presented. The characteristics of shield structures, shielded power cables as well as their connections to ground are also presented.

Finally in the last section, some recommendations to design the. residential structures), framing systems typically consist of the roof structure that supports the roof. deck, exterior and interior load-bearing walls, beams, girders, posts, and floor framing.

Shear walls (or steel moment frames in homes with large windows or other large openings) provide the strength to resist lateral loads. 41 Rev.

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D – Transmission Line Standards Wood Pole Structures Overhead Ground Wire Assembly 41 Rev. C – Transmission Line Standards Suspension Insulator Assemblies Single String 41 Rev. C – Transmission Line Standards Suspension Insulator. Reactive Component of Impedance of a Large Grounding System Coupling Between Test Leads Buried Metallic Objects 7.

Earth Resistivity 8. Ground Impedance General Methods of Measuring Ground Impedance Testing the Integrity of the Ground Grid Instrumentation 9. Earth Potential Equipotential Lines Potential. The overvoltage damaged 7 of the Avionics WRAs that had to be replaced. Later, in a Texas hangar I found an improper HZ system bond which resulted in 31 volts (p-p) on the HZ neutral conductor.

Since the aircraft generally use the structure as a neutral conductor and as a "ground" reference, it raises Cain with the electronics. better systems. Ceiling and drywall grid, trims, and, transitions engineered to install faster and easier, and perform better. Shown above: Painted Grid System (l) and PRELUDE XL with DUNE (r).

It is buried deep within the brain and constitutes an evolutionarily old structure. The limbic system includes the thalamus, hypothalamus and amygdala. The limbic system plays a central role in arousing fight-or-flight situations, such as job interviews, Black Friday shopping trips.

only for supporting structures of spherical storage tanks. Chapters 7 and 8 calls for requirements of flat-bottomed, cylindrical above-ground storage tanks and under-ground storage tanks, respectively. Examples of design procedure for each type of tanks in chapters 4 through 8.

Best test plan templates and examples in description of test plan structure and what it should contain, all parts of test plan, IEEE standard.

Main possibilities of EasyQA test management tool. Grounding Electrode System and Grounding Electrode Conductor Part III zNEC (Grounding Electrode System) Electrodes Water Pipe if 10 ft. or more of metal water pipe is in contact with the earth. Metal Frame of the Building or Structure where the following methods are used to make an earth connection: (1,2,3,4).

A system of mechanical linkages, springs, dampers that is used to connect the wheels to the chassis is known as a suspension system.

It has usually done two works-controlling the vehicle’s handling and braking for safety and keeping the passengers comfortable from bumps, vibrations, etc. utility meter earth ground at a location where the grounding grid is closest to the electric meter ground. All electrical equipment and instruments and above ground structures susceptible to lightning strikes are connected to this grounding grid (see Figure 4).

Larger above ground structures, such as buildings, will tie into the grounding. Construction Systems and their Ranges of Application Composite construction using steel decking Span range 6 to 15 m Structure depth to mm Cellular beams in composite construction Span range9 to 18 m Structure depth to mm Fabricated or rolled beams with large web openings Span range9 to 20 m Structure depth to mm.

Thus, the suspension system includes springs, shock absorbers and their suspension system of a motor vehicle is divided into the rear end suspension and front end suspension.

Types of Suspension System. Following are the 15 different types of the suspension system. Front End Suspension System; Rigid axle front suspension. Independent front suspension. Suspension Structures building structures in which the main elements that support the load (wires, cables, chains, grids, sheet diaphragms, and so on) are subject only to forces of extension.

Suspension structures, which exist under conditions of extension, make possible the full use of the mechanical properties of high-strength materials (for example. Degree of Master of Engineering in High Performance Structures Abstract Structural design requires a full understanding and knowledge of all the components comprising the structure.

The main element of a cable suspended bridge is the cable system. Special attention on aspects other than mathematical calculations should be. impedance that is on the order of ten times the value of the resistive component for large substations.

If applicable (e.g., GIS structures), take into consideration inductive coupling between grid conductors. These factors can have a considerable impact on the potential rise of the grounding grid and on the measured ground impedance. Home» Innovative Vibration Test Equipment & Measuring Products» Suspension Component Test Systems.

Suspension Component Test Systems. Acoustic quality, vehicle dynamics and stability, and driver comfort play an increasingly important role in the development of new chassis and suspension systems – both passive and active.

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We additionally see requirements for bonding steel rebar in concrete in IEEE (Emerald Book) Section and IEEE (Green Book) Section and Magnetic build up, harmonics, transients, EMI/EMF and other objectionable currents that can build up on steel rebar will need a path to ground.

Suspension system design excellence follows the basic laws of physics using design synthesis techniques, a methodical process for suspension geometry development. Suspension geometry is the foundation of vehicle performance from which high-confidence suspension components and .Ground Control Suspension Systems is your stop for high quality American Made Performance Suspension for your BMW, Honda, Acura, Mustang, Camaro, Mustang, ETC!J.

Rope Decent System (RDS) or Bosun’s Chair - One of the most common and popular types of equipment employed for washing windows. - Refer to Primary Suspension Systems Guide for More Information.

K. Monorail System - Monorail systems are often used to access difficult-to-reach or otherwise inaccessible exterior or interior glass areas.