Autonomous guidance method to arbitrarily curved course with homogeneous matrix.

A Nonlinear Control Method for Autonomous Navigation Guidance

This paper deals with a nonlinear feedback control method based on Lie derivatives for the navigation guidance of unmanned aerial vehicles (UAVs). The paper proposes a modelling concept for planar and three-dimensional navigation together with proven algorithms to cope with the autonomous navigation along waypoints and on loiters. The steps that were performed in order to validate the autonomou...

Incremental Predictive Command of Velocity to Be Gained Guidance Method

In this paper, a new incremental predictive guidance method based on implicit form of velocity to be gained algorithm is proposed. In this approach, the generalized incremental predictive control (GIPC) approach is applied to the linearized model for compensating the guidance error. Instead of using the present state in popular model based predictive controller (MPC), in the new method both pre...

A Modified Midcourse Guidance Law Based on Genelarized Collision Course

Experiments in autonomous underground guidance

This paper presents the results of an experimental program for evaluating sensors and sensing technologies in an underground mining applications. The objective of the experiments is to infer what combinations of sensors will provide reliable navigation systems for autonomous vehicles operating in a harsh underground environment. Results from a wide range of sensors are presented and analysed. C...

A generalized upper bound solution for bimetallic rod extrusion through arbitrarily curved dies

In this paper, an upper bound approach is used to analyze the extrusion process of bimetallic rods through arbitrarily curved dies. Based on a spherical velocity field, internal, shearing and frictional power terms are calculated. The developed upper bound solution is used for calculating the extrusion force for two types of die shapes: a conical die as a linear die profile and a streamlined di...