5 papers
Cyclic Reformulation-Based Identification and Polytopic Uncertainty Modeling for Multirate Systems
Hiroshi Okajima, Kakeru Ono
Modern control systems increasingly rely on heterogeneous sensors operating at different sampling rates, where intermittently missing outputs pose fundamental challenges for system…
Stable Inversion of Discrete-Time Linear Periodically Time-Varying Systems via Cyclic Reformulation
Hiroshi Okajima
Inverse systems for discrete-time linear periodically time-varying (LPTV) plants are fundamental to feedforward control and iterative learning control of multirate and periodic sys…
Closed-Loop Identification of Periodically Time-Varying Systems via Cyclic Reformulation
Hiroshi Okajima
This paper studies closed-loop identification of linear periodically time-varying (LPTV) plants, with emphasis on open-loop unstable plants for which open-loop experiments are not…
LMI Optimization Based Multirate Steady-State Kalman Filter Design
Hiroshi Okajima
This paper presents an LMI-based design framework for multirate steady-state Kalman filters in systems with sensors operating at different sampling rates. The multirate system is f…
Cyclic Reformulation Based System Identification for Periodically Time-varying Systems
Hiroshi Okajima, Yusuke Fujimoto, Hiroshi Oku +1
This paper addresses a system identification for linear periodically time-varying plants in the discrete-time setting. A system identification algorithm for linear, periodically ti…