SOLAR ORIENTING DEVICE FOR EXPANDABLE FLAT-PANEL ARRAY
Abstract
The effects of solar declination change on the total angular error of the array and the position for mounting the sun sensor are treated. Curves of total angular error versus declination change for various values of the tracking drive error are presented. An example is outlined for calculating the possible period of unattended operation of the solar orienting device and its array for a particular set of initial conditions which contain a constant declination value. The tracking rate for the array is examined to obtain an insight into some of the important parameters affecting its operation. The requirements for automatic declination control applicable to the solar orienting device were examined, and a feasible approach to the sensor is presented. A circuit diagram illustrates the additional hardware needed for two-axis automatic control. Sensor modification is discussed for the purpose of removing the dead zone which, under certain tracking conditions, can occur. Experimental results gained from the breadboard model of the mount and drive unit are given, and the sun sensor accuracy is also obtained. Photographs of the breadboard mount and sun sensor are included.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 26, 1962
- Accession Number
- AD0273551
Entities
People
- G.j. Mckeel
Organizations
- Goodyear Aerospace