An LQR torque compensator for driveline oscillation damping

Templin, Peter; Egardt, Bo

doi:10.1109/cca.2009.5281020

Cited by 44 publications

(21 citation statements)

References 5 publications

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“…The tire characteristics, including the torsional stiffness, the nonlinear longitudinal force, and the vertical vibration, have a certain effect on the longitudinal vibration. However, in some literatures on the longitudinal vibration, the tire torsional elasticity and the tire slip characteristics are not considered in detail [18]. In this part, the influence of the tire torsional stiffness and slip on longitudinal vibration are studied firstly and then the sensitivity analysis of the two factors is conducted.…”

Section: Sensitivity Analysis Of the Tirementioning

confidence: 99%

“…A different type of dual-inertia model was designed. The differences are that the second inertia was equivalent to the inertia of vehicle mass and an equivalent damping, representing the tire dynamics, was connected in series to half-shaft [18]. Also, a dual-inertia model was expressed in the form of a transfer function to design controller in literature [19].…”

Section: Introductionmentioning

confidence: 99%

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A Reduced‐Order Model for Active Suppression Control of Vehicle Longitudinal Low‐Frequency Vibration

Hao

Zhao

Huang

2018

Shock and Vibration

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Establishing a prediction model, with linearity and few dof (degree of freedom), is a key step for the design of a control algorithm based on the modern control theory. In this paper, such a model is needed for active suppression of vehicle longitudinal low-frequency vibration. However, many dynamic processes in the vehicle have different effects on the vibration. Therefore, a detailed coupling model is firstly established, considering the dynamics of the torsional vibrations of the driveline and the tire, the tire force nonlinearity, and the vehicle vertical and pitch vibrations. Based on this model, sensitivity analysis is conducted and the results show that the tire slip, the torsional stiffness of the half-shaft, and the tire have great influences on the longitudinal vibration. Then a three-dof model is obtained by linearizing the tire slip into damping. A parameter estimation method is designed to obtain the model parameters. Finally, the model is validated. The time domain response, error analysis, and frequency response results demonstrate that the 3-dof model has a good consistency with the detailed coupling model. It is suitable as a control-oriented model.

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Section: Sensitivity Analysis Of the Tirementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Reduced‐Order Model for Active Suppression Control of Vehicle Longitudinal Low‐Frequency Vibration

Hao

Zhao

Huang

2018

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…Bemporad et al (2001) proposed some simple models with two masses where the first represented the engine and the second the vehicle which included the powertrain, clutch and shafts. Templin and Egardt (2009) investigated a torsional drivetrain model with only two degrees of freedom. A more detailed model was developed by Walha et al (2011) to study the effect of the eccentricity defect on the dynamic behavior of a coupled clutch-helical two stage gear system.…”

Section: Introductionmentioning

confidence: 99%

“…Wu and Guangqiang (2016) developed a torsional driveline model to analyze torsional vibration and reduce the gear rattle. Ghorbel et al (2017) proposed a linear model with 22 DOFs including the main subsystems of an automotive drivetrain (engine, clutch, two helical gear stage and disc brake) to investigate their dynamic behavior and modal properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of the gear local damage and profile error of the gear on the drivetrain dynamic response

Ghorbel

Zghal

Abdennadher

et al. 2018

jtam

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The dynamic modeling of vibration of a drivetrain is used for increasing our information about vibration generating mechanisms, especially in the presence of some kind of gear faults. This paper describes a research work on the automotive driveline modeling, vibration analysis, and the effect of gear defects on the dynamic behavior of the system. Firstly, main drivetrain components including the engine, clutch, single stage spur gearbox and disc brake are modeled, respectively. The nonlinear dynamic model is simulated by a thirteen degrees of freedom (DOF) system and the nonlinear function is due to the dry friction path. Secondly, two types of defects are modeled and introduced into the spur gear system; local damage and profile error. Then, the nonlinear equations of motion are solved by the numerical Runge Kutta method and a comparative study of the dynamic behavior of the system in healthy and defected cases is discussed for each fault type. The influence of the defects on the vibration response is presented in the time and frequency domain. Finally, analysis of the two defects together is presented.

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“…In some previous studies, linear quadratic regulator (LQR) and H infinity controllers were proposed to damp driveline oscillations for conventional vehicles (Lefebvre et al, 2003;Templin and Egardt, 2009). Uncertainties in parameters such as vehicle mass were discussed in the design of an H infinity controller.…”

Section: Introductionmentioning

confidence: 99%

Drivability improvements for a single-motor parallel hybrid electric vehicle using robust controls

Wang

Zhang

et al. 2014

J. Zheijang Univ.-Sci.

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For a single-motor parallel hybrid electric vehicle, during mode transitions (especially the transition from electric drive mode to engine/parallel drive mode, which requires the clutch engagement), the drivability of the vehicle will be significantly affected by a clutch torque induced disturbance, driveline oscillations and jerks which can occur without adequate controls. To improve vehicle drivability during mode transitions for a single-motor parallel hybrid electric vehicle, two controllers are proposed. The first controller is the engine-side controller for engine cranking/starting and speed synchronization. The second controller is the motor-side controller for achieving a smooth mode transition with reduced driveline oscillations and jerks under the clutch torque induced disturbance and system uncertainties. The controllers are all composed of a feed-forward control and a robust feedback control. The robust controllers are designed by using the mu synthesis method. In the design process, controloriented system models that take account of various parameter uncertainties and un-modeled dynamics are used. The results of the simulation demonstrate the effectiveness of the proposed control algorithms.

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An LQR torque compensator for driveline oscillation damping

Cited by 44 publications

References 5 publications

A Reduced‐Order Model for Active Suppression Control of Vehicle Longitudinal Low‐Frequency Vibration

A Reduced‐Order Model for Active Suppression Control of Vehicle Longitudinal Low‐Frequency Vibration

Effect of the gear local damage and profile error of the gear on the drivetrain dynamic response

Drivability improvements for a single-motor parallel hybrid electric vehicle using robust controls

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