Steering force in the drivetrain from research into formula student

Deep space drilling is necessary for appropriate chemical and biological sampling for subsurface exploration. The Robotic Planetary Drilling System (RPDS), which is currently being developed by our team, is designed to be a compact self-propelled, steerable electromechanical drilling system that can penetrate into large depths in planetary bodies. In this paper we present the detailed innovative mechanical design of the RPDS. Its main components are: a) the drill bit/cuttings bucket, b) the rotary propulsion unit including novel three 3-degree of freedom (DOF) propulsion actuators, c) the power/control module, d) the non-rotating steering unit including three 1-DOF steering actuators and e) the communication module. Three 3-DOF propulsion actuators uniformly distributed around the rotary propulsion unit impart rotating, linear motion to the drilling bit, while another three 1-DOF steering actuators provide the steering force for automatic directional control. The RPDS is propelled in the manner of a turning screw, which offers simpler kinematics structure, higher efficiency and thus, potential for miniaturization and deep drilling. The mathematical modeling and analysis of the RPDS that were conducted to evaluate its performance are also being presented in this paper.

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Escort Tug Performance Prediction Using Computational Fluid Dynamics

Journal of Ship Research ◽

10.5957/jsr.2016.60.2.61 ◽

2016 ◽

Vol 60 (02) ◽

pp. 61-77

Author(s):

Brendan Smoker ◽

Bart Stockdill ◽

Peter Oshkai

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Flow Separation ◽

Travel Speed ◽

Hydrodynamic Forces ◽

Full Scale ◽

Computational Fluid Dynamics Cfd ◽

Cfd Method ◽

Thrust Forces ◽

Steering Force

In this paper, we outline and validate a computational fluid dynamics (CFD) method for determining the hydrodynamic forces of an escort tug in indirect towing mode. We consider a range of yaw angles from 0° to 90° and a travel speed of 8 knots. We discuss the effects of scaling on prediction of flow separation and hydrodynamic forces acting on the vessel by carrying out CFD studies on both model and full-scale escort tugs performing indirect escort maneuvers. As the escort performance in terms of maximum steering forces is strongly dependent on the onset of flow separation from the hull and skeg of the tug, the model-scale simulations under-predict the maximum steering force by 12% relative to the full-scale simulations. In addition, we provide a method for converting the hydrodynamic forces of the CFD escort study into towline and thrust forces.

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Direct adaptive steering – independent control of steering force and wheel angles to improve straight line stability

Proceedings - 5th International Munich Chassis Symposium 2014 ◽

10.1007/978-3-658-05978-1_8 ◽

2014 ◽

pp. 75-89 ◽

Cited By ~ 1

Author(s):

Satoshi Miura

Keyword(s):

Independent Control ◽

Straight Line ◽

Steering Force

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Force Field-Based Control of Dynamic Particles with User-Specified Paths

International Journal of Image and Graphics ◽

10.1142/s0219467815500096 ◽

2015 ◽

Vol 15 (03) ◽

pp. 1550009

Author(s):

Muhammad Rusdi Syamsuddin ◽

Jimwook Kim ◽

Sung-Hee Lee

Keyword(s):

Force Field ◽

Real Time ◽

Target Location ◽

Attraction Force ◽

B Splines ◽

Human Figure ◽

Physics Based Animation ◽

Steering Force ◽

Animation System ◽

Number Of Particles

We present a framework to design force fields that drive particles to follow a path under the physics-based animation system. In this framework, a user interactively specifies the desired path, represented by a Bezier curve using a GUI and the attraction force that drives a particle toward the target location. Then, the framework automatically defines the steering force to make a particle follow the desired path. To this end, we use B-splines to define the steering force that best approximates the user-specified path. We demonstrate the effectiveness of our method by showing a large number of particles following the desired path and forming an animated human figure. Our method creates a stable behavior of particles and is fast enough to run in real time.

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Effects of Ground Surface Condition on Steering Force for Tractors with Electronic Power Steering System

Journal of Biosystems Engineering ◽

10.5307/jbe.2005.30.6.327 ◽

2005 ◽

Vol 30 (6) ◽

pp. 327-332

Author(s):

S. S. Lee ◽

K. S. Lee ◽

W. Y. Park ◽

S. Y. Kim ◽

J. Y. Lee ◽

...

Keyword(s):

Surface Condition ◽

Ground Surface ◽

Steering System ◽

Power Steering System ◽

Power Steering ◽

Steering Force

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A STUDY ON THE INFLUENCE OF GEOMETRIC SUSPENSION PARAMETERS ON A FSAE VEHICLE STEERING FORCE REDUCTION

10.20906/cps/cob-2015-1798 ◽

2015 ◽

Author(s):

Andre Tognolli ◽

Agenor de Toledo Fleury ◽

Roberto Bortolussi

Keyword(s):

Suspension Parameters ◽

Force Reduction ◽

Steering Force

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Assessment of the Evaluation Procedures of Drivers with Disabilities

The Occupational Therapy Journal of Research ◽

10.1177/153944929501500301 ◽

1995 ◽

Vol 15 (3) ◽

pp. 147-164 ◽

Cited By ~ 6

Author(s):

Stephen Sprigle ◽

Belinda O. Morris ◽

George Nowachek ◽

Patricia E. Karg

Keyword(s):

United States ◽

Reaction Time ◽

Range Of Motion ◽

Grip Strength ◽

Occupational Therapists ◽

The United States ◽

Persons With Disabilities ◽

Evaluation Procedures ◽

Ability To Drive ◽

Steering Force

Surveys were sent to 403 driver evaluators and trainers throughout the United States whose clientele includes persons with disabilities, and 138 responses (35%) were received from 44 states. Most of the respondents were experienced evaluators, and 62% were occupational therapists. They were asked to report on the methods, equipment, and criteria used when assessing an individual's ability to drive. The measurement of specific driving characteristics (i.e., brake reaction time, steering force) was reported as being more important than measuring nonspecific physical characteristics (i.e., range of motion, grip strength), yet only one half of the respondents measured most of the defined driving characteristics. Most characteristics were measured through observation or a functional test rather than by using equipment. The overwhelming majority of evaluators used subjective criteria or no criteria when judging the findings of a test. Despite these results, two thirds of the evaluators reported being satisfied with their current evaluation equipment.

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