Wind Disturbance Models
Wind is the main source of antenna/telescope disturbance. It loads the antenna structure and causes pointing problems. The wind load is divided into mean (or static load) and variable load (gusts). The load depends on the wind speed, on direction of the wind with respect to the antenna structure (yaw), and on the antenna elevation position (pitch).
This chapter discusses models of steady-state wind, and a model of wind gusts. The steady-state model is obtained from wind tunnel data for different yaw angles and different antenna elevation positions. The model is verified with the 34-m antenna wind data obtained in the field.
The wind gust models include forces acting on the dish, wind torques at the drives, and wind disturbance at the velocity input of the velocity loop.
Steady-State Wind Disturbance Model
The antenna wind loads are typically separated into two components: steady-state (or mean, or static) and dynamic (gusts) load. Both the static and dynamic wind loads are used to...
KeywordsWind Speed Wind Tunnel Elevation Angle Unit Standard Deviation Friction Torque
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