Authors:
Alessandro Giua,
Carla Seatzu,
Giampaolo Usai,
Volume: 1, Page 438 Paper number 2181
Abstract:
In this paper we realize the design of an active--passive suspension
system for the axletree of a road vehicle based on a linear model with
four degrees of freedom. The optimal control law we propose aims to
optimize the suspension performance while ensuring that the magnitude
of the forces generated by the two actuators and the total forces applied
between wheel and body never exceed given bounds. We derive a solution
that takes the form of an adaptive control law that switches between
different constant state feedback gains. The results of our simulations
show that the bound on the active forces is a design parameter useful
for establishing a trade-off between performance and power requirement.
Authors:
Jonas Fredriksson,
Bo S. Egardt,
Volume: 1, Page 444 Paper number 1866
Abstract:
In this paper the problem of automating the gearshift process of a
manual transmission without synchronizers is investigated. The application
is very interesting from an integrated powertrain control point of
view, since it includes many different control tasks and encourages
the use of the engine as an actuator to the rest of the powertrain.
A model-based control law for the task of gearshifting is presented.
The controller is designed based on the backstepping methodology. It
includes control laws for transmission torque control as well as for
engine speed control. Simulations have shown good results for the gearshift
controller.
Authors:
Xiao-Yun Lu,
Karl J. Hedrick,
Volume: 1, Page 450 Paper number 1941
Abstract:
This paper considers the theoretical part for longitudinal control
of merging maneuver for Automated Highway System. The longitudinal
control problem for merging is proposed for different road layouts.
Then a unified mathematical model is established and a new concept
virtual platooning is proposed, which effectively avoids a two point
boundary value problem. Based on it, a rather general adaptive algorithm
is provided and proved. This algorithm has been implemented and tested
with automated cars.
Authors:
Jingang Yi,
Luis Alvarez,
Roberto Horowitz,
Carlos Canudas de Wit,
Volume: 1, Page 456 Paper number 2026
Abstract:
A controller for emergency braking of vehicles in Automated Highway
Systems (AHS) is designed. The scheme is based on the estimation of
both the LuGre tire/road friction dynamic model and the braking system
gain. The controller estimates the tire/road relative velocity which
achieves maximum braking force based on a quasi-static solution of
the LuGre friction model and sets the master cylinder pressure to track
that relative velocity. This control system is designed to work in
conjunction with antilock-braking-systems (ABS) providing two advantages:
less chattering during braking and a source of a priori information
regarding safe spacing.
Authors:
Rachid Outbib,
Ahmed Rachid,
Volume: 1, Page 462 Paper number 1092
Abstract:
In this paper we present a new nonlinear approach to control the speed
of a vehicle. We first propose a nonlinear transformation of a vehicle
dynamics model, which takes into account the main non linearities of
the process, to facilitate the control of the vehicle dynamics. Afterwards,
we establish that the nonlinear model can be made asymptotically stable
around a desired longitudinal speed.
Authors:
Alexander G. Loukianov,
Jaime Escoto Hernández,
Volume: 1, Page 464 Paper number 1671
Abstract:
This paper applies the block control method to form a decomposed control
law suitable for multivariable linear time-delay systems. A Block
Controllable Form is introduced, and a non-singular transformation
that reduces the system to this form, is proposed. Conditions of stability
of the closed-loop system are derived.
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