Comparison between Rule-Based and Instantaneous Optimization for a Single-Mode, Power-Split HEV

2011 ◽  
Author(s):  
Namwook Kim ◽  
Aymeric P. Rousseau
Keyword(s):  
Single Mode ◽  
Rule Based ◽  
Power Split ◽  
Instantaneous Optimization

An Optimal Power Management Strategy for Hydraulic Hybrid Output Coupled Power-Split Transmission

2009 ◽  
Author(s):  
Rajneesh Kumar ◽  
Monika Ivantysynova
Keyword(s):  
Dynamic Programming ◽  
Power Management ◽  
Control Strategy ◽  
Management Strategy ◽  
Optimal Solution ◽  
Programming Approach ◽  
Power Management Strategy ◽  
Optimal Power ◽  
Power Split ◽  
Instantaneous Optimization

Power-split drive represents a class of Continuously Variable Transmission (CVT) that combines the convenience of CVT with the high overall transmission efficiency. In its hybrid configuration, a high pressure accumulator is used to capture the braking energy that is regenerated to aid the engine power during the next propulsion event. Output coupled power split drives are particularly suited for small and medium duty vehicle applications. In this work, optimal power management strategy has been designed based on Dynamic Programming approach. Although the control strategy obtained by Dynamic Programming is non-causal, it represents the benchmark solution against which other implementable power management schemes can be compared. Another control strategy based on instantaneous optimization is also discussed where a given cost function is minimized at every instant. It results in a sub-optimal solution that is practical and implementable. Finally, Dynamic Programming results are utilized to discuss the possible improvements that can be made to the instantaneous optimization based control strategy.

Modeling and Control of a Novel Power Split Hybrid Electric Vehicle

2014 ◽  
Author(s):  
Qadeer Ahmed ◽  
Haiwei Cai ◽  
Giorgio Rizzoni ◽  
Longya Xu
Keyword(s):  
Hybrid Electric Vehicle ◽  
Fuel Efficiency ◽  
Operating Mode ◽  
System Level ◽  
Operating Characteristics ◽  
Rule Based ◽  
Modeling And Control ◽  
High Fuel Efficiency ◽  
Power Split ◽  
Hybrid Electric

This paper presents a novel dual-clutch, transmission-less hybrid electric powertrain architecture using Dual Mechanical Port Machine (DMPM). The proposed architecture offers the vehicle to operate in four different modes i.e. charge depleting mode, charge sustaining mode, highway mode and braking mode. Power/energy flow in each operating mode is explored and operating characteristics of each prime mover in all four modes are analyzed. A detailed system level modeling is conducted for the proposed powertrain. The power split HEV offers a variety of control problems to insure its optimal performance. In this paper, a rule based control has been designed to meet some of the outlined control objectives. The simulation results show that the proposed HEV architecture with a rule based energy management scheme offers high fuel efficiency as compared to its conventional counterpart.

Optimal Design of Single-Mode Power-Split Hybrid Tracked Vehicles

2018 ◽  
Vol 140 (10) ◽  
Author(s):  
Zhaobo Qin ◽  
Yugong Luo ◽  
Keqiang Li ◽  
Huei Peng
Keyword(s):  
Optimal Design ◽  
Degrees Of Freedom ◽  
Single Mode ◽  
Topology Design ◽  
Hybrid Powertrain ◽  
Tracked Vehicles ◽  
Power Split ◽  
Skid Steering ◽  
Design Selection ◽  
Low Efficiency

Hybrid tracked vehicles are common in construction, agriculture, and military applications. Most use a series hybrid powertrain with large motors and operate at a relatively low efficiency. Although some researchers have proposed power-split powertrains, most of these would require an additional mechanism to achieve skid steering. To solve this problem and enhance drivability, a single-mode power-split hybrid powertrain for tracked vehicles with two outputs connected to the left and right tracks is proposed. The powertrain with three planetary gears (PGs) would then be able to control the torque on the two tracks independently and achieve skid steering. This powertrain has three degrees-of-freedom (DOF), allowing for control of the output torques and the engine speed independently from the vehicle running speed. All design candidates with three PGs are exhaustively searched by analyzing the dynamic characteristics and control to obtain the optimal design. Efficient topology design selection with parameter sizing and component sizing is accomplished using the enhanced progressive iteration approach to achieve better fuel economy using downsized components.

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