This paper presents a technique to estimate the average time separation of events (TSE) in stochas-tic timed Petri nets that can model time-independent choice and have arbitrary delay distributions associated with places. The approach analyzes nite net unfold-ings to derive closed-form expressions for lower and upper bounds on the average TSE, which can be ef-ciently evaluated using standard st...

This paper addresses the problem of guidance and control for an Autonomous Surface Craft (ASC). A path following approach is used for steering the vehicle along a predefined path. The presented solution is based on the definition of an error vector that should be driven to zero by the path-following controller. The proposed methodology for controller design assumes a polytopic Linear Parameter ...

This paper presents a technique to estimate the average time separation of events (TSE) in stochastic timed Petri nets that can model time-independent choice and have arbitrary delay distributions associated with places. The approach analyzes nite net unfoldings to derive closed-form expressions for lower and upper bounds on the average TSE, which can be eeciently evaluated using standard stati...

A shared lane keeping assistance system supports the driver in the steering task. In contrast to an autonomous system, the shared system works in parallel with the driver by applying an additional torque on the steering wheel. This means the system and the driver perform the steering task in cooperation. As the driver is still part of the control loop a driver model is required to predict the s...

This paper presents a new approach to closed-loop control of optical jitter with a new liquid crystal beam steering device. In contrast to conventional fast steering mirrors, where the laser beam is reflected of the controlled mirror surface, the transmissive liquid crystal beam steering device optically redirects the laser beam. The new device has no moving parts and requires low operating pow...

In spite of the presence of powered wheelchairs, some of the users still experience steering challenges and manoeuvring difficulties that limit their capacity of navigating effectively. For such users, steering support and assistive systems may be very necessary. To appreciate the assistance, there is need that the assistive control is adaptable to the user's steering behaviour. This paper cont...

This paper introduces balanced switching schemes to compensate linear and quadratic gradient errors, in the unary current source array of a current-steering digital-to-analog converter (DAC). A novel algorithm is proposed to avoid the accumulation of gradient errors, yielding much less integral nonlinearities (INLs) than conventional switching schemes. Switching scheme examples with different n...

Optical phased arrays are versatile components enabling rapid and precise beam steering. An integrated approach is followed in which a 1D optical phased array is fabricated on silicon-on-insulator. The optical phased array consists of 16 parallel grating couplers spaced 2 mum apart. Steering in one direction is done thermo-optically by means of a titanium electrode on top of the structure using...

This paper describes a conceptual model for computational program steering. By exploiting previous results attained in program monitoring, debugging, and connguration, the abstractions and mechanisms derived from this model are shown suitable for both algorithmic and human interactive steering. A characterization of existing systems for computational steering using the model's abstractions demo...

In this paper, we extend our previous model circuit for steering in C. elegans to control a more realistic biomechanical model of forward locomotion. We show that the identified steering circuit is sufficient to steer the full body during forward locomotion while only innervating a few of the anterior most neck muscles. Analysis of the sensorimotor transformation and phasic stimulation experime...