Distributed Linear Quadratic Optimal Control: Compute Locally and Act Globally

Compute Globally, Act Locally: Protecting Federated Systems from Systemic Threats

Building dependable federated systems is often complicated by privacy concerns: if the domains are not willing to share information with each other, a global or ‘systemic’ threat may not be detected until it is too late. In this paper, we study this problem using a somewhat unusual example: the financial crisis of 2008. Based on results from the economics literature, we argue that a) the impend...

Think globally, act locally

In a large cyber-physical system, even if individual system elements interact with one another only locally, effects of local decisions quickly spread across the system and combine to yield global consequences. In order to reason about such a system without impractical amounts of communication and computation, we must summarize the system’s global state, and base individual decisions at least p...

Think globally, act locally

This issue of Asia Pacific Allergy (Asia Pac Allergy) will be released at the beginning of its third year of circulation. Asia Pac Allergy is just two years old yet very active and on the way to developing into a leading publication in allergic disease research. We thank all the authors and readers for their efforts and contributions. Our current issue features two valuable reviews on the topic...

Optimal Linear Quadratic Control

Linear Quadratic Optimal Control

In previous lectures, we discussed the design of state feedback controllers using using eigenvalue (pole) placement algorithms. For single input systems, given a set of desired eigenvalues, the feedback gain to achieve this is unique (as long as the system is controllable). For multi-input systems, the feedback gain is not unique, so there is additional design freedom. How does one utilize this...