Mechanical design engineering. NASA/university advanced design program: Lunar Bulk Material Transport Vehicle

Details Mechanical design engineering. NASA/university advanced design program: Lunar Bulk Material Transport Vehicle Mechanical design engineering. NASA/university advanced design program: Lunar Bulk Material Transport Vehicle

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988stin...9024455d&link_type=abstract

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Functional Design Specifications, Lunar Roving Vehicles, Lunar Soil, Lunar Surface Vehicles, Remote Control, Actuators, Cargo, Control Boards, Electric Batteries, Electronic Equipment, Feedback Control, Heaters, Linkages, Multilayer Insulation, Solar Radiation, Steering, Temperature Control

Scientific paper

The design of a Lunar Bulk Material Transport Vehicle (LBMTV) is discussed. Goals set in the project include a payload of 50 cubic feet of lunar soil with a lunar of approximately 800 moon-pounds, a speed of 15 mph, and the ability to handle a grade of 20 percent. Thermal control, an articulated steering mechanism, a dump mechanism, a self-righting mechanism, viable power sources, and a probable control panel are analyzed. The thermal control system involves the use of small strip heaters to heat the housing of electronic equipment in the absence of sufficient solar radiation and multi-layer insulation during periods of intense solar radiation. The entire system uses only 10 W and weighs about 60 pounds, or 10 moon-pounds. The steering mechanism is an articulated steering joint at the center of the vehicle. It utilizes two actuators and yields a turning radius of 10.3 feet. The dump mechanism rotates the bulk material container through an angle of 100 degree using one actuator. The self-righting mechanism consists of two four bar linkages, each of which is powered by the same size actuator as the other linkages. The LBMTV is powered by rechargeable batteries. A running time of at least two hours is attained under a worst case analysis. The weight of the batteries is 100 pounds. A control panel consisting of feedback and control instruments is described. The panel includes all critical information necessary to control the vehicle remotely. The LBMTV is capable of handling many types of cargo. It is able to interface with many types of removable bulk material containers. These containers are made to interface with the three-legged walker, SKITTER. The overall vehicle is about 15 feet in length and has a weight of about 1000 pounds, or 170 lunar pounds.

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