인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
실시간 강성 추정을 이용한 탄성 구동기의 강성 보정 부하 포트 제어 Stiffness-compensated Load-port Control of Series Elastic Actuators Using Online Stiffness Estimation
논문 기본 정보
- 저자정보
- 발행연도
- 2026.11
- 수록면
- 1,537 - 1,544 (8page)
- DOI
- 10.5302/J.ICROS.2026.26.0206
실시간 강성 추정을 이용한 탄성 구동기의 강성 보정 부하 포트 제어
초록·키워드
Series elastic actuators place an elastic element between the motor and the load, which attenuates external impacts but can make precise load position control difficult. Load-Port Control (LPC) transforms the position control input into the load-port path, which reduces the phase lag seen by load position feedback, using complementary-filter-based acceleration estimation. However, LPC depends on the nominal stiffness in both the input transformation and the model-based acceleration estimation, so a mismatch between actual and nominal stiffness alters the reference response and the closed-loop characteristic equation, degrading performance. This paper proposes Stiffness-Compensated Load-Port Control (SC-LPC), which estimates stiffness from the motor-side dynamics residual and applies the estimate to the LPC input transformation, the feedback path, and the model-based acceleration branch. The singularity in the stiffness estimate at small spring deflections is mitigated through regularized regression of filtered signals with a projection. Closed-loop stability is assessed in two stages: a small-gain condition guarantees stability under the time-varying stiffness estimate, and equilibrium-point linearization evaluates local stability including motor model mismatch. Simulink simulations show that, for stiffness mismatch ratios from 0.5 to 2.0 with a matched motor model, SC-LPC reduces the worst-case root-mean-square error by about 95.3% and the worst-case peak difference by about 92.6% compared with the conventional complementary filter-based LPC. These results indicate that SC-LPC suppresses the effect of stiffness mismatch on the load position response.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.