Gear Shifting Control for Medium Truck without Clutch

2011 ◽  
Vol 52-54 ◽  
pp. 2138-2144
Author(s):  
Yong Dan Chen ◽  
Jun Qiang Xi ◽  
Chun Guang Xu
Keyword(s):  
Theoretical Analysis ◽  
Mathematical Models ◽  
Control Strategy ◽  
Free State ◽  
Engine Control ◽  
Gear Shift ◽  
The Road ◽  
Clutch Control ◽  
Synchronisation Phase ◽  
Gap Time

Traditionally a gear shift with clutch control makes the synchronisation phase unnecessarily long torque gap time. Gear shifting by engine control realizes fast gear shifts by controlling the engine instead of sliding the clutch to a torque-free state in the transmission. Detailed mathematical models of different driveline states are presented and to improve driving comfortable. Theoretical analysis results are compared with experimental ones from the road experience in equal conditions in order to prove the validity of the gear shifting control strategy.

Powerful Gear Shifting Control for Hybrid Electric Bus with Automated Manual Transmission

2012 ◽  
Vol 195-196 ◽  
pp. 1023-1029
Author(s):  
Yong Dan Chen ◽  
Jun Qiang Xi ◽  
Chun Guang Xu
Keyword(s):  
Predictive Control ◽  
Control Strategy ◽  
Simulation Analysis ◽  
Hybrid Electric Bus ◽  
The Road ◽  
Electric Bus ◽  
Parallel Hybrid ◽  
Automated Manual Transmission ◽  
Hybrid Electric ◽  
Synchronisation Phase

Traditionally a gear shift with clutch and synchronizer control makes the synchronisation phase unnecessarily long torque gap time. Based on the benefit of a single shaft parallel hybrid electric bus (PHEV), fast gear shifting and reducing the shafts speed oscillation can be realized by controlling the electric machine with Model Predictive Control (MPC ) method instead of sliding the clutch and synchronizer to a torque-free state in the transmission. Detailed mathematical models of different driveline states are presented and to improve driving comfort. Theoretical and simulation analysis results are compared with experimental ones from the road experiment in equal conditions in order to prove the validity of the gear shifting control strategy.

scholarly journals Coordinated Control of RSC and GSC for DFIG System under Harmonically Distorted Grid Considering Inter-Harmonics

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 28 ◽  
Author(s):  
Bo Pang ◽  
Hui Dai ◽  
Feng Li ◽  
Heng Nian
Keyword(s):  
Theoretical Analysis ◽  
Control Strategy ◽  
Coordinated Control ◽  
Delay Compensation ◽  
Pass Filter ◽  
Grid Connection ◽  
Distorted Grid ◽  
Negative Impacts ◽  
Doubly Fed ◽  
Grid Side

For improving the performance of a doubly fed induction generator (DFIG) system under a harmonically distorted grid, this paper proposes a coordinated control strategy which is effective for grid inter-harmonics as well as grid integer harmonics. In order to suppress the negative impacts caused by grid harmonics, including inter-harmonics, this paper introduces an additional harmonics suppression controller, which contains a Chebyshev high-pass filter and a modified lead element considering the delay compensation. The proposed controller is employed in the rotor side converter (RSC) and grid side converter (GSC). Based on the proposed harmonics suppression controller, a coordinated control strategy between RSC and GSC is developed, in which the control targets, including the sinusoidal output current, constant power, or steady generator torque, can be achieved for DFIG, while GSC is responsible for maintaining the sinusoidal total current to guarantee the power quality of the grid connection. The effectiveness of the proposed method is verified by the theoretical analysis, and the experimental results derived using a 1 kW DFIG system validate the correctness of the theoretical analysis.

Road Feel Design for Vehicle Steer-by-Wire System Based on Joystick

2013 ◽  
Vol 336-338 ◽  
pp. 734-737
Author(s):  
Hong Yu Zheng ◽  
Ya Ning Han ◽  
Chang Fu Zong
Keyword(s):  
Computer Simulation ◽  
Control Strategy ◽  
Vehicle Speed ◽  
Control Module ◽  
Matlab Simulink ◽  
The Road ◽  
Steering Feel ◽  
Steer By Wire ◽  
Simulation Results ◽  
Wire System

In order to solve the problem of road feel feedback of vehicle steer-by-wire (SBW) system based on joystick, a road feel control strategy was established to analyze the road feel theory of traditional steer system, which included return, assist and damp control module. By verifying the computer simulation results with the control strategy from software of CarSim and Matlab/Simulink, it shows that the proposed strategy can effective get road feel in different vehicle speed conditions and could improve the vehicle maneuverability to achieve desired steering feel by different drivers.

Study on Electro-Pneumatic Clutch for Automatic Mechanical Transmission

2011 ◽  
Vol 148-149 ◽  
pp. 1149-1153
Author(s):  
Wu Chao Zhang ◽  
Yong Zhai
Keyword(s):  
Diesel Engine ◽  
Field Experiment ◽  
Control Strategy ◽  
Engine Speed ◽  
Mechanical Transmission ◽  
Control Law ◽  
Clutch Engagement ◽  
Automotive Powertrain ◽  
System Requirements ◽  
Clutch Control

The clutch control is one of the cores and most difficult issues in the development of an AMT system. In this paper the pneumatic clutch engagement characteristic is analyzed. Thereto, a simulation model of an automotive powertrain comprises a diesel engine, drivetrain and wheels driving a vehicle through tire-road adhesion are built using Matlab/Simulink. In the simulation, a refined control law of constant engine speed in part process is proposed and tested. The engaging speed and displacement of the clutch vary with the accelerate paddle opening, engine speed, clutch driven plate speed and gears according the control law. Field experiment results show that the control strategy fulfills the system requirements.

The Technology Study of New Asymmetrical Half-Bridge Converter

2014 ◽  
Vol 986-987 ◽  
pp. 1884-1887
Author(s):  
Yue Fen Wu
Keyword(s):  
Theoretical Analysis ◽  
Control Strategy ◽  
Bridge Circuit ◽  
Technology Study ◽  
Soft Switch ◽  
Dc Bias ◽  
The Common ◽  
Simulation Results

Because the shortcomings of the common asymmetrical half-bridge circuit can't achieve soft switch and has DC bias for the transformer, the paper studies a new asymmetrical half-bridge circuit. Compared with the traditional asymmetrical half-bridge circuit, the circuit is added an auxiliary switch and diode by the composition of the slip. Thus the converter can achieve the control strategy of symmetric PWM. At last the simulation results show that the theoretical analysis is correct.

A Model Predictive Control Strategy for Lateral and Longitudinal Dynamics in Autonomous Driving

2020 ◽  
Author(s):  
Irfan Khan ◽  
Stefano Feraco ◽  
Angelo Bonfitto ◽  
Nicola Amati
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Control Strategy ◽  
Autonomous Driving ◽  
Maximum Speed ◽  
Reference Trajectory ◽  
Vehicle Speed ◽  
The Road ◽  
Speed Regulation ◽  
Road Geometry

Abstract This paper presents a controller dedicated to the lateral and longitudinal vehicle dynamics control for autonomous driving. The proposed strategy exploits a Model Predictive Control strategy to perform lateral guidance and speed regulation. To this end, the algorithm controls the steering angle and the throttle and brake pedals for minimizing the vehicle’s lateral deviation and relative yaw angle with respect to the reference trajectory, while the vehicle speed is controlled to drive at the maximum acceptable longitudinal speed considering the adherence and legal speed limits. The technique exploits data computed by a simulated camera mounted on the top of the vehicle while moving in different driving scenarios. The longitudinal control strategy is based on a reference speed generator, which computes the maximum speed considering the road geometry and lateral motion of the vehicle at the same time. The proposed controller is tested in highway, interurban and urban driving scenarios to check the performance of the proposed method in different driving environments.

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