Mixed H2/H attitude control of a LEO microsatellite in the presence of inertia matrix uncertainty

Yun Ping Sun, Ciann Dong Yang

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


Owing to a great decrease in size and weight, the pointing of microsatellite is vulnerable to disturbances and the uncertainty of moment-of-inertia variation. Mixed H2/H control, giving consideration to both stability robustness and root-mean-square (rms) performance, is an effective approach for attitude controller design of microsatellites in face of exogenous disturbances and plant uncertainties. This paper applies mixed H2/H controller to address a critical condition that during the translation thrusting the attitude of microsatellite is affected by the unbalanced torque of coupled thrusters and the resulting variation of moment-of-inertia from operation mode switch. By using linear matrix inequality method, the numerical solution of mixed H2/H state-feedback controller can be efficiently solved. The results of an integrated test including reaction wheel dynamics prove that mixed H2/H controller has satisfactory rms performance of pointing control and remarkable robustness to inertia matrix uncertainty by making a compromise between H2 and H costs.

Original languageEnglish
Pages (from-to)1354-1359
Number of pages6
JournalProceedings of the American Control Conference
Publication statusPublished - 2002 Jan 1
Event2002 American Control Conference - Anchorage, AK, United States
Duration: 2002 May 82002 May 10

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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