A method and device for engine starting μ comprehensive robust control of power split system
A robust control and robust controller technology, which is applied in the direction of engine starting, engine motor starting, control devices, etc., can solve the problems of not considering the perturbation of the output shaft damping parameters, ignoring the structure, etc., to reduce conservatism , the effect of ensuring robustness and robust stability
Active Publication Date: 2021-05-11
TONGJI UNIV
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[0005] The H∞ robust control method for the mode switching of the compound power split hybrid power system is aimed at the compound power split hybrid power system, only considering the influence of the change of the damping parameter of the input shaft (engine shaft) of the transmission system on the control, and not considering the perturbation of the damping parameter of the output shaft , in addition, although the H∞ control adopted considers the uncertainty of the system, but because it ignores the structural nature of the system uncertainty in the analysis, the controller designed according to this theory is relatively conservative
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Embodiment 1
[0071] This embodiment provides a comprehensive robust control method for engine starting μ of a power split system, which is used for engine start control of a power split hybrid system.
[0072] In the following, a detailed description will be given from the power-split hybrid system and μ-synthesis robust control method.
[0073] 1. Power split hybrid system
[0074] like figure 1 As shown, the power split hybrid power system includes engine 1, motor ISG4, motor TM7, single planetary gear and two-speed AMT gearbox 6, engine 1 is connected to planet carrier 3, motor ISG4 is connected to sun gear 2, ring gear 5 is connected to output The motor TM7 is connected with the output shaft through the two-speed AMT gearbox 6.
[0075] The present embodiment is directed to the engine starting process of switching from pure electric to e-CVT hybrid mode. Assuming that the vehicle initially runs in pure electric mode, the vehicle is driven solely by the motor TM. When the vehicle co...
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The present invention relates to a method and device for engine start μ comprehensive robust control of a power split system, which is used for engine start control of a power split hybrid power system. The method includes the following steps: the first step: adopting dynamic programming to solve the optimal dragging speed of the engine speed curve; the second step: estimate the reference speed curve at the output end of the gearbox; the third step: track the optimal dragging speed curve of the engine and the reference speed curve at the output end of the gearbox by pre-establishing a robust control closed-loop system, and obtain The expected torque of the motor ISG and the motor TM; the fourth step: according to the expected torque of the motor ISG and the motor TM, control the motor ISG and the motor TM to start the engine. Compared with the prior art, the present invention can effectively realize the quick start of the engine and improve driving comfort, ensure the robustness and robust stability of the system during the starting process, and reduce the conservatism of the robust control.
Description
technical field [0001] The invention relates to the field of power split hybrid power systems, in particular to a comprehensive robust control method and device for engine starting μ of the power split system. Background technique [0002] The power-split hybrid system has gradually become the mainstream technical solution of the plug-in hybrid commercial vehicle power system. Frequent switching between modes, but due to the underdamped characteristics of the power system, the problem of vehicle driving comfort during the mode switching process is more prominent, which plagues and restricts the industrial application of power split hybrid power systems. In particular, the switching process from pure electric to electronic-continuously variable transmission (e-CVT) hybrid mode not only involves engine starting, shifting element action, and power source power switching, but is also affected by the engine, motor, etc. The influence of dynamic characteristics, coupled with the ...
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IPC IPC(8): B60W20/15B60W40/00B60W10/08B60W10/06B60W50/00F02N11/08
CPCB60W10/06B60W10/08B60W40/00B60W50/00B60W2050/0039B60W2710/06B60W2710/08B60W20/15F02N11/0803Y02T10/62
Inventor 赵治国范佳琦李豪迪陈溢付靖
Owner TONGJI UNIV