Preshaping Profiler for Flexible Spacecraft Rest-to-Rest Maneuvers
Toshio Kamiya, Ken Maeda, and Naoto Ogura (*1)
Tatsuaki Hashimoto, Shin-ichiro Sakai (*2)
(*1) NEC TOSHIBA Space Systems, Ltd., Fuchu, Tokyo, 183-8551, Japan
(*2) JAXA-ISAS, Sagamihara, Kanagawa, 229-8510, Japan
Abstract: A new feedforward algorithm for flexible spacecraft maneuvers is presented.
We call this preshaping profiler the nil-mode-exciting (NME) profiler. This algorithm is
designed particularly for single-axis rest-to-rest rotational maneuvers (switching
maneuvers) with linear actuators. Generally spacecraft with large flexible structure has a
lot of large-mass flexible-modes. Therefore, uncertainity of high-order modes needs to
be considered for high-accuracy controller design. This paper presents an extrainsensitive
maneuvering method which overcomes above-mentioned difficulties. This
algorithm includes a preshaping profiler formulated from sampling function (also known
as sinc function), consequently feedforward control inputs generated from the
preshaping profiler have no frequency response above a certain designed frequency.
Therefore residual vibration at the end-point of maneuver can be highly reduced with
minimum loss of maneuver agility.
Keywords: Attitude control, Flexible structure, Attitude Maneuver, Preshaping profiler,
Flexible mode
柔軟衛星高速マヌーバ用の周波数事前成形プロファイラ
摘要：柔軟衛星の高速マヌーバのための新しいフィードフォワード制御アルゴリズム（NME プロフ
ァイラと称する）を提案する。大型柔軟構造物を有する衛星の姿勢マヌーバのためには柔軟物の固
有振動数の不確定性に対するロバスト性が重要であり、大型構造物の場合、多数の大有効質量の柔
軟モードを有するため、過去に提案された方式ではロバスト性確保が難しい場合が多い。提案する
NME プロファイラは、コントローラと柔軟構造モードの理想的な周波数分離を可能とし、これらの
欠点を克服する周波数事前成形プロファイラである。