In automation control system applications, the transmitted engine and clutch torque are unavoidable information for the control strategies. For example, these information are required to engine control, hybrid vehicle...
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LiDAR-camera extrinsic calibration (LCEC) is the core for data fusion in computer vision. Existing methods typically rely on customized calibration targets or fixed scene types, lacking the flexibility to handle varia...
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The interest in engine torque and clutch torque estimation is important in the automotive industry. They are determinant variables in engine and powertrain management like hybrid engine vehicle, automated transmission...
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× Nowadays, the dual clutch transmission is tending to be generalized because of the high yield of this kind of gearbox with sprockets. The dual clutch transmission also allows gear shifting without torque breaki...
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ISBN:
(纸本)9781509006274
× Nowadays, the dual clutch transmission is tending to be generalized because of the high yield of this kind of gearbox with sprockets. The dual clutch transmission also allows gear shifting without torque breaking. These kinds of transmissions are usually controlled in torque. To exploit all of the capacities of this technology in term of comfort and driving pleasure, accurate information of both clutch torque is mandatory. Further, the clutch torque cannot be measured on vehicle because of cost and packaging reasons. This paper proposes a technical solution of the clutch torque estimation in the dual clutch control framework. The estimation is based on an angular discrete domain Takagi-Sugeno switched observer and shaft torsion estimation from encoder sensors with a virtual teeth adding method. The methodology permits to obtain very interesting simulation results of clutch torque estimation on a complete vehicle simulation platform.
This paper aims to present a systematic methodology for designing a Replica of an Advanced Takagi-Sugeno (RATS) discrete observer. Advance observers for nonlinear systems under Takagi-Sugeno representation have been d...
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ISBN:
(纸本)9781509006274
This paper aims to present a systematic methodology for designing a Replica of an Advanced Takagi-Sugeno (RATS) discrete observer. Advance observers for nonlinear systems under Takagi-Sugeno representation have been designed for years using efficient structure such as non-PDC (Parallel Distributed Compensation), which it is powerful and, in some cases, it is the only observer able to estimate an unknown value. However, in spite of these advantages, this observer strategy presents an inconvenient: The use of matrix inversion. This paper will present the RATS observer which is equivalent an observer using the non-PDC structure without matrix inversion. By a stability analysis, not only the efficiency is proved but also its validity. Finally, some simulation results will emphasize the originality and the power of the proposed RATS observer.
This paper aims to present an original methodology to design an observer that can be used in idle speed control using a global command for the throttle and an individual command for the spark timing. To develop an eff...
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This paper aims to present an original methodology to design an observer that can be used in idle speed control using a global command for the throttle and an individual command for the spark timing. To develop an efficient control, we need previously to estimate unmeasured parameters such as the torque generated by each cylinder. Two observers are proposed: the methodology for the first one is based on a discrete periodic Takagi-Sugeno approach, and the second one on an unknown input observer. Finally, some simulation results showing the performance of the developed methodology are provided. The model used for our simulation is based on a dynamic hybrid one.
This paper aims to manage the problem of matrix inversion in advanced Takagi-Sugeno-based controllers such as most of the non-Parallel Distributed Compensation. These controllers are difficult to use in embedded compu...
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This paper aims to manage the problem of matrix inversion in advanced Takagi-Sugeno-based controllers such as most of the non-Parallel Distributed Compensation. These controllers are difficult to use in embedded computers that have limited performances due to technologic resources. The originality of the proposed method is to use an observer written under the descriptor form for approximating the fuzzy matrix inversion. Thanks to such an observer, the advanced controller can be approximated in both steady and transient phases. Consequently, an Estimation-based control Law for Approximating Takagi-Sugeno-based (ECLATS) controller is developed using Lyapunov stability analysis and Linear Matrix Inequalities formulation. This ECLATS controller can provide similar performances than the advanced fuzzy ones, but without any matrix inversion. Numerical examples prove the efficiency of the estimation by comparison.
Adaptivity for user "personalised" support is viewed as complementary to systems for cognitive support and is related to the following aspects of user modelling: individual user profile, user style/state dia...
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Adaptivity for user "personalised" support is viewed as complementary to systems for cognitive support and is related to the following aspects of user modelling: individual user profile, user style/state diagnosis, context of work and mental workload prediction. The paper reports the results of an empirical study revealing a particular kind of contextual influences on user behaviour, namely, the freedom to choose the set of operations to be performed from a larger set of tasks, valid for all users at the basic skill level of performance. Stability of patterns was found on the level of minimal reaction times (RTs), but not on the level of mean RTs. Neural networks successfully generalised the minimal RT profiles across contexts.
This paper presents a nonlinear control approach for quadrotor Micro Aerial Vehicles (MAVs), which combines a backstepping-like regulator based on the solution of a certain class of global output regulation problems f...
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This paper presents a nonlinear control approach for quadrotor Micro Aerial Vehicles (MAVs), which combines a backstepping-like regulator based on the solution of a certain class of global output regulation problems for the rigid body equations on SO(3), a robust controller for the system with bounded disturbances, as well as a trajectory generator using a model predictive control method. The proposed algorithm is endowed with strong convergence properties so that it allows the quadrotor MAVs to reach almost all the desired attitudes. The control approach is implemented on a high-payload-capable quadcopter with unstructured dynamics and unknown disturbances. The performance of our algorithm is demonstrated through a series of experimental evaluations and comparisons with another control method on normal and aggressive trajectory tracking tasks.
Generator protection misoperations may intensify a disturbance or even lead the power system to a major outage, especially when it occurs in a large power plant. Additionally, the power system expansion changes the sh...
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ISBN:
(纸本)9781509041695
Generator protection misoperations may intensify a disturbance or even lead the power system to a major outage, especially when it occurs in a large power plant. Additionally, the power system expansion changes the short circuit currents and, thus, from time to time the system requires a re-evaluation of protection coordination. In this paper, Itaipu power plant's modeling, analysis and coordination evaluation of the protection functions performed due to scheduled technological update are presented. Lessons learned and undesirable situations concerning operation of large generators connected to large transmission systems observed during this process were used to propose a set of guidelines for overexcitation protection coordination evaluation for generators with the same type of configuration.
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