Company Filing History:
5 out of 462 
1 out of 210 Years Active: 1989-2001
Title: Innovations of Tung Y Liu in Spacecraft Technology
Introduction
Tung Y Liu is a notable inventor based in Union City, CA (US), recognized for his contributions to spacecraft technology. He holds a total of 6 patents that focus on improving spacecraft performance and efficiency. His innovative approaches have significantly impacted the field of aerospace engineering.
Latest Patents
One of Liu's latest patents is centered around spacecraft and appendage stepping methods that enhance spacecraft attitude pointing and mitigate solar array slew disturbances. This invention involves a spacecraft equipped with a body and one or more flexible appendages. The controller implements methods to rotate these appendages towards the Sun, effectively reducing disturbances that affect the spacecraft's attitude. By timing the steps of the appendages, Liu's invention aims to cancel periodic disturbances, thereby improving overall spacecraft pointing performance.
Another significant patent involves a method using double thruster firings to deadbeat flexible solar arrays. This innovation includes a spacecraft with multiple thrusters strategically mounted to generate torque about a desired axis. The thruster firings are partitioned into two time-offset firings, which are calculated based on the dominant modal frequency of the spacecraft structure. This method enhances the control of the spacecraft's orientation and stability.
Career Highlights
Throughout his career, Tung Y Liu has worked with prominent companies in the aerospace sector, including Space Systems/Loral, LLC and Ford Aerospace & Communications Corporation. His experience in these organizations has contributed to his expertise in spacecraft technology and innovation.
Collaborations
Liu has collaborated with notable colleagues such as Scott W Tilley and John Scott Higham. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and advancements in aerospace technology.
Conclusion
Tung Y Liu's innovative contributions to spacecraft technology demonstrate his commitment to enhancing the performance and efficiency of space exploration. His patents reflect a deep understanding of the challenges faced in aerospace engineering and provide solutions that advance the field.