Optimum steering input determination and path-tracking of all-wheel steer vehicles on uneven terrains based on constrained optimization

Singh, Arun Kumar and Ghose, Debasish and Krishna, Madhava K (2012) Optimum steering input determination and path-tracking of all-wheel steer vehicles on uneven terrains based on constrained optimization. In: 2012 American Control Conference (ACC), 27-29 June 2012, Montreal, QC.

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Abstract

In this paper we propose a framework for optimum steering input determination of all-wheel steer vehicles (AWSV) on rough terrains. The framework computes the steering input which minimizes the tracking error for a given trajectory. Unlike previous methodologies of computing steering inputs of car-like vehicles, the proposed methodology depends explicitly on the vehicle dynamics and can be extended to vehicle having arbitrary number of steering inputs. A fully generic framework has been used to derive the vehicle dynamics and a non-linear programming based constrained optimization approach has been used to compute the steering input considering the instantaneous vehicle dynamics, no-slip and contact constraints of the vehicle. All Wheel steer Vehicles have a special parallel steering ability where the instantaneous centre of rotation (ICR) is at infinity. The proposed framework automatically enables the vehicle to choose between parallel steer and normal operation depending on the error with respect to the desired trajectory. The efficacy of the proposed framework is proved by extensive uneven terrain simulations, for trajectories with continuous or discontinuous velocity profile.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright of this article belongs to IEEE.
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	24 Feb 2014 07:58
Last Modified:	24 Feb 2014 07:58
URI:	http://eprints.iisc.ac.in/id/eprint/48452

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