High-Precision Bi-Directional Beam-Pointing Measurement Method Based on Space Solar Power Station System

Area of Science:

• Space engineering
• Wireless power transmission
• Optical metrology

Background:

• Wireless energy transmission efficiency from Space Solar Power Stations (SSPS) is limited by beam control accuracy.
• Existing methods neglect factors like antenna deviation and modulation errors, reducing energy transmission efficiency.

Purpose of the Study:

• To propose an innovative high-precision bi-directional beam-pointing measurement method.
• To enhance beam-pointing control accuracy by improving measurement precision for SSPS.

Main Methods:

• Utilizes interferometer goniometry for precise guiding beam pointing measurement.
• Employs power field reconstruction for energy-transmitting beam offset angle measurement.

Main Results:

• Achieves 0.05° guiding beam-pointing measurement accuracy under dynamic conditions, surpassing the traditional 0.1°.
• Provides measurement accuracy better than 0.11 m for energy center offset distance.
• Offers measurement accuracy better than 0.012° for energy beam offset angle.

Conclusions:

• The proposed bi-directional measurement method significantly improves beam-pointing accuracy for wireless energy transmission.
• This advancement provides a foundation for more efficient and reliable power beaming from SSPS to satellites.