scholarly journals Design and Experimental Study of Progressive Spring for Formula Student Race Car

2021 ◽  
Author(s):  
Anmol Shripad Patil ◽  
Eshita Nandi ◽  
Prasad Nanasaheb Punekar ◽  
Suyash Wagh
Keyword(s):  
Vehicle Dynamics ◽  
Design Procedure ◽  
Ride Quality ◽  
Linear Rate ◽  
Spring Rate ◽  
Roll Control ◽  
Race Car ◽  
Linear Spring ◽  
Design Calculations ◽  
Major Factors

Abstract The purpose of carrying out the present work is to design, manufacture & test the progressive springs on an FS vehicle. This is one type of helical spring with a variable spring rate. The main purpose of designing progressive springs is to avail all the advantages of the variable spring rate over the linear spring rate and better ride quality along with roll control, compared to linear rate springs. We took several factors of vehicle dynamics under consideration before settling on progressive springs. Before starting with the design procedure, we had set objectives and followed the standard methodology of spring design to get the required output. Along with that, we took design philosophy under consideration. We reviewed all the parameters before finalizing the spring material as it is one of the major factors. We carried out all the necessary design calculations to complete the dimensions and stiffness of the spring. The conclusion helped us to achieve better ride quality and roll control accompanying the optimized spring design satisfying all the necessities such as load, stiffness, and deflection of progressive springs.

A novel tuned mass-conical spring system for passive vibration control of a variable mass structure

2021 ◽  
pp. 107754632110004
Author(s):  
Sanjukta Chakraborty ◽  
Aparna (Dey) Ghosh ◽  
Samit Ray-Chaudhuri
Keyword(s):  
Variable Mass ◽  
Design Procedure ◽  
Time History ◽  
Tuned Mass Damper ◽  
Water Tank ◽  
Mass System ◽  
Mass Damper ◽  
Linear Spring ◽  
Spring System ◽  
Elevated Water

This article presents the design of a tuned mass damper with a conical spring to enable tuning to the natural frequency of the system at multiple values, as may be convenient in case of a system with fluctuations in the mass. The principle and design procedure of the conical spring in the context of a varying mass system are presented. A passive feedback control mechanism based on a simple pulley-mass system is devised to cater to the multi-tuning requirements. A design example of an elevated water tank with fluctuating water content, subjected to ground excitation, is considered to numerically illustrate the efficiency of such a tuned mass damper associated with the conical spring. The conical spring is designed based on the tuning requirements at different mass conditions of the elevated water tank by satisfying the allowable load bearing capacity of the spring. Comparisons are made with the conventional passive tuned mass damper with a linear spring tuned to the full tank condition. Results from time history analysis reveal that the conical spring-tuned mass damper can be successfully designed to remain tuned and thereby achieve significant response reductions under stiffening conditions of the primary structure, whereas the linear spring-tuned mass damper suffers performance degradation because of detuning, whenever there is any fluctuation in the system mass.

BACKSTEPPING CONTROL OF NONLINEAR ROLL MOTION FOR A TRAWLER WITH FIN STABILIZER

2021 ◽  
Vol 159 (A2) ◽  
Author(s):  
H Demirel ◽  
A Doğrul ◽  
S Sezen ◽  
F Alarçin
Keyword(s):  
Lift Coefficient ◽  
Design Procedure ◽  
Nonlinear Damping ◽  
Backstepping Control ◽  
Roll Motion ◽  
Scaled Model ◽  
3 Dimensional ◽  
Roll Control ◽  
Fin Stabilizer ◽  
Volume Method

A backstepping control design procedure for nonlinear fin roll control of a trawler is presented in this paper. A roll equation consisting of linear and nonlinear damping and restoring moment on the roll response is expressed. Flow analyses are carried out for a scaled model of trawler type fishing vessel including fin stabilizers on both sides of the hull. The fin stabilizer geometry is chosen as NACA 0015 foil section which is widely used in the literature. The flow analyses are performed by using a commercial computational fluid dynamics (CFD) software based on finite volume method. The flow problem is modeled in a 3-dimensional manner while the flow is considered as steady, incompressible and fully turbulent. The numerical model consists of the ship wetted surface and the fin stabilizer in order to investigate the hull-fin interaction. Non-dimensional lift coefficients of the fin stabilizer for different angles of attack are gained. Both controlled and uncontrolled roll motions are examined and simulated in time domain for the maximum lift coefficient. Backstepping controller for roll motion has given a rapid and precise result.

Active Aerodynamics Through Active Body Control: Modelling and Static Simulator Validation

2020 ◽  
Author(s):  
Henrique de Carvalho Pinheiro ◽  
Francesco Russo ◽  
Lorenzo Sisca ◽  
Alessandro Messana ◽  
Davide De Cupis ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Control Strategy ◽  
Vehicle Dynamics ◽  
Fuzzy Logic Control ◽  
High Performance ◽  
Subjective Evaluation ◽  
The Body ◽  
Race Car ◽  
Logic Control ◽  
The Stability

Abstract Active aerodynamics is a growing field in the race car and high-performance vehicles segments, since each situation on the track may require different aero forces to achieve the best vehicle dynamics performance. This paper presents an active aerodynamics control system developed through the active control of the body trim. By interchanging four different setups on the suspension heights with a fuzzy logic control, relevant advantage is obtained in terms of lap time reduction. Two systems, a PID and a Feedforward logic, are studied to implement the control strategy and important differences are found in the stability of tire-ground forces benefiting the latter. Furthermore, the system was validated in a Driver-In-the-Loop (DIL) static simulator with a more realistic road conditions and important insights in terms of subjective evaluation.

Low-speed vehicle dynamics and ride quality using controlled D.C. electromagnets

Automatica ◽  
1977 ◽  
Vol 13 (6) ◽  
pp. 605-610 ◽  
Author(s):  
B.V. Jayawant ◽  
P.K. Sinha
Keyword(s):  
Vehicle Dynamics ◽  
Ride Quality ◽  
Low Speed

scholarly journals Design and Analysis of Inclined Belt Conveyor System for Coal Loading for Weight Reduction

2020 ◽  
Vol 9 (2) ◽  
pp. 707-711
Keyword(s):  
Weight Reduction ◽  
High Reliability ◽  
Design Procedure ◽  
Belt Conveyor ◽  
Element Analysis ◽  
Conveyor System ◽  
Geometrical Modelling ◽  
Solid Works ◽  
Design Calculations ◽  
Reliability Of Operation

Belt conveyor is used for the transportation of material from one location to another. Belt conveyor has high load carrying capacity, large length of conveying path, simple design, easy maintenance and high reliability of operation. This paper discuss about study of design procedure and analysis of inclined type belt conveyor system for coal loading application.1 The paper shows design calculations of conveyor, trajectory of the material on conveyor, power and belt design and stresses on pulley due to belt tensions at and slack and tight side. The results comprises of capacity, power calculations on pulley, stress analysis on pulley drive shaft, on components of belt conveyor and its effect. The Belt conveyor used for coal processing industry is considered to have a design capacity is 250 TPH and speed of the conveyor to be 115 ft. /min. Geometrical modelling has been done using Catia V5R20 and finite element analysis is done in Solid works 2018. This paper discusses the conveyor design and weight optimization. Material weight reduction is accomplished using ASHBY charts and ASME standards and finally weight optimisation and performance index has been discussed.

Backstepping Control of Nonlinear Roll Motion for a Trawler with Fin Stabilizer

2017 ◽  
Vol Vol 159 (A2) ◽  
Author(s):  
H Demirel ◽  
A Doğrul ◽  
S Sezen ◽  
F Alarçin
Keyword(s):  
Lift Coefficient ◽  
Design Procedure ◽  
Nonlinear Damping ◽  
Backstepping Control ◽  
Roll Motion ◽  
Scaled Model ◽  
3 Dimensional ◽  
Roll Control ◽  
Fin Stabilizer ◽  
Volume Method

A backstepping control design procedure for nonlinear fin roll control of a trawler is presented in this paper. A roll equation consisting of linear and nonlinear damping and restoring moment on the roll response is expressed. Flow analyses are carried out for a scaled model of trawler type fishing vessel including fin stabilizers on both sides of the hull. The fin stabilizer geometry is chosen as NACA 0015 foil section which is widely used in the literature. The flow analyses are performed by using a commercial computational fluid dynamics (CFD) software based on finite volume method. The flow problem is modeled in a 3-dimensional manner while the flow is considered as steady, incompressible and fully turbulent. The numerical model consists of the ship wetted surface and the fin stabilizer in order to investigate the hull-fin interaction. Non dimensional lift coefficients of the fin stabilizer for different angles of attack are gained. Both controlled and uncontrolled roll motions are examined and simulated in time domain for the maximum lift coefficient. Backstepping controller for roll motion has given a rapid and precise result.

Design of a Formula SAE Race Car: Vehicle Dynamics and Performance

1982 ◽  
Author(s):  
Campbell Duncan Carter ◽  
Cindy Barr Sherman ◽  
Ronald D. Matthews
Keyword(s):  
Vehicle Dynamics ◽  
Formula Sae ◽  
Race Car ◽  
And Performance

Computer Aided Design of Mixed Flow Turbines for Turbochargers

1979 ◽  
Vol 101 (3) ◽  
pp. 440-448 ◽  
Author(s):  
N. C. Baines ◽  
F. J. Wallace ◽  
A. Whitfield
Keyword(s):  
Mass Flow ◽  
Computer Aided Design ◽  
High Speed ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Design Procedure ◽  
Mixed Flow ◽  
Computer Aided ◽  
Design Calculations ◽  
Aided Design

The paper describes a comprehensive computer aided design procedure and its use to investigate mixed flow turbines for automotive turbocharger applications. The outside dimensions of rotor and casing as well as blade angles are determined from one-dimensional design and off design calculations, the detailed blade shape from quasi-three-dimensional analysis and mechanical stressing and vibration programs, and geometric data are presented as outside views and sections of the rotor by a graphics subroutine. The procedure consists of a series of separate programs rather than a single program, so that the designer’s intervention at each stage of the process can be applied. Two mixed flow rotors were designed, manufactured and tested in a specially designed high speed dynamometer. The first was intended to achieve a substantial increase in mass flow over the reference radial rotor without loss of efficiency, while the latter was intended as a direct replacement of the reference radial rotor, but should give more favorable pulse performance when operating in conjunction with an engine due to changes in the operating map viz: a) lower tip speeds for best efficiency, and b) flatter mass flow characteristics. Both effects were predicted by analysis and confirmed by tests.

Master and Slave Hydrostatic Bearing Systems for Machine Tools

1966 ◽  
Vol 8 (2) ◽  
pp. 152-161 ◽  
Author(s):  
G. P. Kearney
Keyword(s):  
Machine Tools ◽  
Journal Bearing ◽  
Load Capacity ◽  
Design Procedure ◽  
High Load ◽  
General Analysis ◽  
Hydrostatic Bearing ◽  
Hydrostatic Bearings ◽  
Design Calculations ◽  
High Load Capacity

Master and slave systems utilize two types of hydrostatic bearing in order to provide high load capacity in conjunction with non-redundant location by rigid-film hydrostatic bearings. Master bearings are controlled both by applied thrust and by their clearance, and they also control the thrust in the slave bearings which act independently of their own clearances. A journal bearing is used to illustrate analysis of bearing systems, redundant locations, and master and slave systems. A general analysis of master and slave systems is given and a design procedure, advantages, fields of application, and design calculations for individual bearings are outlined in the text and appendixes.

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