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72
Impacts of Mixed Use and Density on Utilization of Three Modes of Travel: Single-Occupant Vehicle, Transit, and Walking,"
- Transportation Research Record
, 1994
"... Findings from an empirical analysis to test the impacts of land-use mix, population density, and employment density on the use of the singleoccupant vehicle (SOV), transit, and walking for both work trips and shopping trips are presented. The hypothetical relationships tested focused on whether the ..."
Abstract
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Cited by 152 (7 self)
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there is a relationship between urban form and modal choice, whether this relationship exists when controlling for non-urban form factors, whether this relationship is linear or nonlinear, and whether a stronger relationship exists between modal choice and urban form when they are measured at both trip ends
Modal Space
"... Control systems for shakers are necessary to remove both shaker dynamics as well as coupling effects between the shaker and the structure under test. Little attention has been given to shaker control for nonlinear structures. This paper presents the design, implementation and results of a shaker con ..."
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Control systems for shakers are necessary to remove both shaker dynamics as well as coupling effects between the shaker and the structure under test. Little attention has been given to shaker control for nonlinear structures. This paper presents the design, implementation and results of a shaker
Isochronous manifolds in self-triggered control
"... Abstract — Feedback control laws are predominantly implemented on digital platforms as periodic tasks. Although periodicity simplifies the analysis and design of the implementation, new applications call for more efficient utilization of available resources such as processor utilization. To address ..."
Abstract
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Cited by 4 (1 self)
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continue our exploratory journey in the field of self-triggered control for nonlinear systems. In our previous work, we exploited the geometry of homogeneous and polynomial control systems to identify one dimensional manifolds along which the execution times scaled in a predictable manner. In this paper we
Continuation model predictive control on smooth manifolds
"... Abstract: Model predictive control (MPC) anticipates future events to take appropriate control actions. Nonlinear MPC (NMPC) describes systems with nonlinear models and/or constraints. Continuation MPC, suggested by T. Ohtsuka in 2004, uses Krylov-Newton iterations. Contin-uation MPC is suitable for ..."
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for nonlinear problems and has been recently adopted for minimum time problems. We extend the continuation MPC approach to a case where the state is implicitly constrained to a smooth manifold. We propose an algorithm for on-line controller implementation and demonstrate its numerical effectiveness for a test
Neural-Network-Based Near-Optimal Control for a Class of Discrete-Time Affine Nonlinear Systems With Control Constraints
"... Abstract—In this paper, the near-optimal control problem for a class of nonlinear discrete-time systems with control constraints is solved by iterative adaptive dynamic programming algorithm. First, a novel nonquadratic performance functional is introduced to overcome the control constraints, and th ..."
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Cited by 22 (6 self)
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Abstract—In this paper, the near-optimal control problem for a class of nonlinear discrete-time systems with control constraints is solved by iterative adaptive dynamic programming algorithm. First, a novel nonquadratic performance functional is introduced to overcome the control constraints
Subdivision shells with exact boundary control and non-manifold geometry
- International Journal for Numerical Methods in Engineering
"... We introduce several new extensions to subdivision shells that provide an improved level of shape control over shell boundaries and facilitate the analysis of shells with non-smooth and non-manifold joints. To this end, modified subdivision schemes are used that enable to relax the continuity of the ..."
Abstract
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Cited by 8 (5 self)
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We introduce several new extensions to subdivision shells that provide an improved level of shape control over shell boundaries and facilitate the analysis of shells with non-smooth and non-manifold joints. To this end, modified subdivision schemes are used that enable to relax the continuity
Nonlinear Torque Control Of A Spark Ignition Engine
, 2000
"... : In vehicles the produced engine torque is closely related to the manifold pressure, which is determined by the position of the throttle. In order to satisfy new comfort and safety requirements or to reduce NO x and HC emissions using variable cam timing an intervention of a torque control is ne ..."
Abstract
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Cited by 4 (0 self)
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is needed. We propose two controller design approaches for this task. First, a new continuous nonlinear controller design method, called modied optimal control, is applied. State of the art controllers are implemented in digital signal processors. We therefore derive a hybrid nonlinear time discrete
Nonlinear Dynamics and Control of Integrally Actuated Helicopter Blades
- Proceedings of the 13th Adaptive Structures Conference
, 2005
"... Abstract: A set of nonlinear, intrinsic equations describing the dynamics of beam struc-tures undergoing large deformations is presented. The intrinsic kinematical equations are derived for the general case of a moving beam. Active force/strain terms are added to the equations to take into account a ..."
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Cited by 4 (4 self)
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, analytical results and then utilized to analyze the dynamic behavior of an active helicopter blade. Beside the analysis of the inherent dynamics of this system in terms of eigenvalues and vectors, the modal controllability of the blade is discussed under the influence of rigid body mo-tion. In a final step
ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING
"... Feedforward A/F control in turbocharged gasoline engines with variable valve timing requires knowledge of exhaust manifold pressure, Pe. Physical conditions in the manifold make measurement costly, compelling manufacturers to implement some form of on-line estimation. Processor limitations and the c ..."
Abstract
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Cited by 5 (1 self)
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Feedforward A/F control in turbocharged gasoline engines with variable valve timing requires knowledge of exhaust manifold pressure, Pe. Physical conditions in the manifold make measurement costly, compelling manufacturers to implement some form of on-line estimation. Processor limitations
Digital second-order sliding mode control for uncertain nonlinear systems
- Automatica
"... Abstract In this note, we analyze the discrete-time implementation of a second-order sliding mode control (2-SMC) scheme. The treatment is detailed for a simple class of feedback-linearizable nonlinear systems expressed in the Brunowsky normal form. First, it is shown that the direct discretization ..."
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Cited by 4 (1 self)
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Abstract In this note, we analyze the discrete-time implementation of a second-order sliding mode control (2-SMC) scheme. The treatment is detailed for a simple class of feedback-linearizable nonlinear systems expressed in the Brunowsky normal form. First, it is shown that the direct
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