We consider systems consisting of finite automata communicating by exchanging messages and working on the same readonly data. We investigate the situation in which the automata work with constant but different speeds. We assume furthermore that the automata are not aware of the speeds and they cannot measure them directly. Nevertheless, the automata have to compute a correct output. We call thi...

In this paper we propose a novel distributed clock synchronization protocol for networks of clocks which have different initial offsets and internal clock speeds. The algorithm is based on an PI-like consensus protocol where the proportional (P) part compensates the different clock speeds while the integral part (I) eliminates the different clock offsets. This synchronization protocol is formal...

The switching speeds of electronics cannot keep up with the transmission capacity offered by optics. All-optical switch fabrics play a central role in the effort to migrate the switching functions to the optical layer. Optical packet switching provides an almost arbitrary fine granularity but faces significant challenges in the processing and buffering of bits at high speeds. Generalized multip...

The back emf harmonics of a permanent magnet (PM) synchronous motor is a major source of torque ripple. For torque control applications including column fitted MDPS (motor driven power steering) systems, it is essential to reduce the mechanical vibrations due to torque ripples at low speeds. In this paper, a torque ripple reduction algorithm for interior PM synchronous motors is proposed. The h...

Studies of locomotion in mice suggest that circuits controlling the alternating between left and right limbs may have a modular organization with distinct locomotor circuits being recruited at different speeds. It is not clear, however, whether such a modular organization reflects specific behavioral outcomes expressed at different speeds of locomotion. Here, we use detailed kinematic analyses ...

This paper presents an analytical study of single-plane automatic balancing of statically and dynamically unbalanced rigid rotors, considering also the effect of partial unbalance compensation and vibration reduction. We consider a rotor equipped with a selfbalancing device consisting of a circular track with moving balls to compensate for rotor unbalance. The investigations include an analysis...

Concurrency is enjoying a second (or third? fourth?) youth. This is triggered by an anticipated revolution in the evolution of computer architecture, from faster, single-processor chips, to multi-processor chips with more and more processors [6]. This change brings hopes that the limits of Moore’s law will be overcome, but also fears that programming will become even harder than it already is. ...

It was recently presented that the Reluctance Synchronous Motor (RSM) is well suited for variable gear electric as well as for hybrid electric vehicles. This paper deeply investigates the capabilities of a Reluctance Synchronous Motor and proposes a multi parameter estimation scheme for Reluctance Synchronous Motor under variable-speed control. The proposed control evaluation model is fully eff...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Toni Tuovinen Name of the doctoral dissertation Model-Based Position Estimation for Synchronous Reluctance Motor Drives Publisher School of Electrical Engineering Unit Department of Electrical Engineering and Automation Series Aalto University publication series DOCTORAL DISSERTATIONS 86/2014 Field of research Industrial Elect...