WO2022044092A1 - ハイブリッド車両の制御方法、及び、ハイブリッド車両の制御装置 - Google Patents
ハイブリッド車両の制御方法、及び、ハイブリッド車両の制御装置 Download PDFInfo
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- WO2022044092A1 WO2022044092A1 PCT/JP2020/031900 JP2020031900W WO2022044092A1 WO 2022044092 A1 WO2022044092 A1 WO 2022044092A1 JP 2020031900 W JP2020031900 W JP 2020031900W WO 2022044092 A1 WO2022044092 A1 WO 2022044092A1
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- command value
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- rotation speed
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- B60W2540/10—Accelerator pedal position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2552/00—Input parameters relating to infrastructure
- B60W2552/15—Road slope, i.e. the inclination of a road segment in the longitudinal direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0605—Throttle position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
- B60W2710/082—Speed change rate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
- B60W2710/085—Torque change rate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/92—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Definitions
- the present invention relates to a hybrid vehicle control method and a hybrid vehicle control device.
- an electric vehicle In an electric vehicle, a configuration is known in which a generator is operated by an internal combustion engine such as an engine and the electric power generated by the generator is supplied to a motor of a drive system.
- a series-type hybrid vehicle Because the power generation system and the drive system are connected in series.
- various natural vibrations may occur, and one example is natural vibration such as torsional vibration generated in a shaft that transmits torque generated in an engine to a generator.
- JP2015-073308A discloses a technique for suppressing a natural vibration component generated in an electric vehicle. According to this technology, in the process of calculating the torque command value for the generator, feedforward (F / F) control is performed in order to control vibration (vibration control), and at the same time, feedback (F / B) control is performed. Will be done.
- the F / F filter processing is performed on the command value according to the desired rotation speed to calculate the F / F torque command value.
- the F / B filter processing is performed on the deviation between the estimated value of the rotation speed and the measured value, and the F / B torque command value is calculated.
- the F / F torque command value and the F / B torque command value are added to obtain the final torque command value for the generator.
- connection part such as an attenuator may be provided between the engine and the generator as a measure against sound vibration.
- periodic disturbances other than the basic order (natural vibration component) of the engine may occur at the connection portion, and system resonance may occur. Since the periodic disturbance that causes such system resonance is different from the natural vibration component, there is a problem that it cannot be reduced even by using the technique disclosed in JP2015-073308A.
- the method for controlling a hybrid vehicle is configured to be rechargeable by connecting a power generation system including a generator configured to connect an engine and a drive shaft and to rotate with the engine, and a power generation system. It is a control method of a hybrid vehicle having a drive system that is driven by receiving power supply from a battery. In this control method, the rotation speed command value for the power generation system is obtained according to the state of the drive system, and the torque command value for the power generation system is obtained so that the rotation speed of the power generation system becomes the rotation speed command value, and the torque command is given.
- Vibration suppression control is performed for the value to suppress the natural vibration component generated at the connection between the engine and the generator, the final torque command value for the power generation system is calculated, and the vibration is caused by a component different from the natural vibration component.
- the torque command value is used as the final torque command value without vibration suppression control.
- FIG. 1 is a schematic view of an electric vehicle according to the first embodiment.
- FIG. 2 is a block diagram showing details of the configuration of the generator controller.
- FIG. 3 is a block diagram showing control by the power generation controller.
- FIG. 4 is a flowchart showing switching control of vibration damping control.
- FIG. 5 is a timing chart showing the driving state of the power generation system of the comparative example.
- FIG. 6 is a timing chart showing a driving state of the power generation system of the present embodiment.
- FIG. 7 is a block diagram showing control by the power generation controller according to the second embodiment.
- FIG. 8 is a flowchart showing switching control of vibration damping control.
- FIG. 9 is a block diagram showing control by the power generation controller according to the third embodiment.
- FIG. 10 is a flowchart showing switching control of vibration damping control.
- FIG. 1 is a schematic view of an electric vehicle according to the first embodiment.
- the electric vehicle 100 includes a drive system 10 as a drive source, a power generation system 20 that supplies electric power to the drive system 10, and a control system 30 that controls the drive system 10 and the power generation system 20. Further, a sensor group 40 for acquiring an input value to the control system 30 is provided.
- An electric vehicle having a configuration in which the power generation system 20 and the drive system 10 are connected in series in this way is referred to as a series hybrid type.
- the drive motor 11 is connected to the drive wheels 14A and 14B via the reducer 12 and the shaft 13. Further, in the drive inverter 15, the DC power supplied from the battery 16 is converted into AC power. The drive wheels 14A and 14B are driven by the rotation of the drive motor 11 in response to the supply of AC power converted by the drive inverter 15. When the electric vehicle 100 performs regenerative braking, the AC power generated in the drive motor 11 is converted into direct current in the drive inverter 15 and then charged into the battery 16. As described above, the battery 16 is configured to be rechargeable and dischargeable.
- the engine 21 is connected to the generator 23 via the attenuator 22, and the generator 23 is rotated by the drive of the engine 21 to generate power.
- the AC power generated by the generator 23 is converted into DC power by the generator inverter 24 and then supplied to the drive system 10.
- the attenuator 22 is for suppressing torque fluctuations transmitted from the engine 21 to the generator 23.
- the attenuator 22 is attached to an inner hub connected to the shaft of the engine 21 and the shaft of the generator 23. It is a spring member provided between the outer hub and the connected outer hub.
- the attenuator 22 having such a configuration can absorb the torque fluctuation caused by the twist between the inner hub and the outer hub.
- the attenuator 22 is an example of a connection portion between the engine 21 and the generator 23, and for example, a low-rigidity shaft connecting the engine 21 and the generator 23 may be the connection portion.
- the control system 30 controls the drive system 10 and the power generation system 20 based on the vehicle speed, the accelerator pedal operation amount, the gradient, etc. input from the sensor group 40.
- the control system 30 includes a system controller 31 that controls the entire system, a drive motor controller 32 and a battery controller 33 that control the drive system 10, and a generator controller 34 and an engine controller 35 that control the power generation system 20.
- the system controller 31 controls the overall operation of the drive motor controller 32, the battery controller 33, the generator controller 34, and the engine controller 35.
- the power generation control unit 311 provided in the system controller 31 controls the battery controller 33, the generator controller 34, and the engine controller 35. In this way, for the power generation system 20, the amount of power generation is controlled by driving the engine 21 and controlling the generator inverter 24.
- the system controller 31 responds to the driver's accelerator pedal operation amount, vehicle speed, vehicle state such as gradient, SOC input from the battery controller 33, and input / output possible power, which are input from the sensor group 40 described later. , Generates command values for the drive system 10 and the power generation system 20.
- the power generation control unit 311 calculates a torque command value T * for the engine controller 35 and a rotation speed command value ⁇ G * for the generator controller 34 in order to generate the desired electric power in the power generation system 20.
- the generator 23 rotates with the engine 21.
- the power generation control unit 311 can obtain desired electric power from the power generation system 20 by controlling the generator inverter 24 at the same time.
- the drive motor controller 32 receives inputs of states such as rotation speed and voltage from the drive motor 11.
- the drive motor controller 32 drives a desired AC power by performing switching control of the drive inverter 15 in order to realize the torque command value T * generated by the system controller 31 based on these inputs. To obtain the desired torque.
- the battery controller 33 is configured to be able to communicate with the battery 16 in both directions, measures SOC (charge state: State Of Charge) based on the current and voltage charged and discharged in the battery 16, and outputs the SOC (charge state: State Of Charge) to the system controller 31. At the same time, the battery controller 33 calculates the input / output possible power of the battery 16 according to the temperature, internal resistance, SCO, etc. of the battery 16 and outputs the input / output power to the system controller 31.
- SOC charge state: State Of Charge
- the generator controller 34 is configured so that the rotation state of the generator 23 can be detected, and the generator inverter 24 rotates so that the generator 23 rotates at the rotation speed command value ⁇ G * generated by the power generation control unit 311. Switching control. As a result, desired DC power can be supplied from the power generation system 20 to the drive system 10.
- the engine controller 35 controls the throttle, ignition timing, and fuel injection amount of the engine 21 so as to be driven by the torque command value T * commanded by the system controller 31 according to the rotation speed and temperature of the engine 21.
- the sensor group 40 includes a vehicle speed sensor 41, an accelerator opening sensor 42, and a gradient sensor 43.
- the vehicle speed sensor 41 is arranged side by side on the drive wheels 14A, 14B, etc., and acquires the speed of the electric vehicle 100 by measuring the rotation speeds of the drive wheels 14A, 14B, and the like.
- the accelerator opening sensor 42 acquires the operation amount of the accelerator pedal.
- the gradient sensor 43 detects the gradient of the traveling path of the electric vehicle 100.
- the vehicle speed, the accelerator pedal operation amount, and the gradient acquired by the vehicle speed sensor 41, the accelerator opening sensor 42, and the gradient sensor 43 are input to the system controller 31.
- the sensor included in the sensor group 40 of the present embodiment is an example, and the control system 30 may perform control according to an input from another sensor.
- FIG. 2 is a block diagram showing details of the configuration of the generator controller 34.
- the generator 23 goes around with the engine 21 driven by the torque command value T * .
- the generator controller 34 controls the generator inverter 24 so that the generator 23 rotates at the rotation speed command value ⁇ G * . In this way, the generator 23 generates the desired electric power, and the generated electric power is supplied to the drive system 10.
- the generator controller 34 includes a power generation controller 341, a current command value calculator 342, a current controller 343, a three-phase two-phase current converter 344, a dq axis adder 345d, 345q, a decoupling controller 346, and two.
- a phase three-phase voltage converter 347 is provided. The detailed operation of these configurations will be described below.
- the power generation controller 341 receives the input of the rotation speed command value ⁇ G * generated by the system controller 31 and the actual rotation speed ⁇ G of the generator 23 input from the resolver 23A attached to the generator 23.
- the power generation controller 341 generates a final torque command value T fin * so that the rotation speed of the generator 23 becomes the rotation speed command value ⁇ G * .
- the current command value calculator 342 is detected by the final torque command value T fin * generated by the power generation controller 341, the DC voltage value V dc used to generate the PWM signal in the generator inverter 24, and the resolver 23A. Accepts the input of the actual rotation number ⁇ G. Then, the current command value calculator 342 generates dq-axis current command values I d * and I q * for the generator 23 based on these inputs.
- the current controller 343 inputs the dq-axis current command values I d * and I q * from the current command value calculator 342 and the dq-axis current measured values I d and I q from the three-phase two-phase current converter 344. accept.
- the current controller 343 sets the dq-axis voltage command values V d * and V q * so that the dq-axis currents I d and I q are equal to the dq-axis current command values I d * and I q * command values, respectively. Generate.
- the three-phase two-phase current converter 344 is provided with respect to the UV axis current measured values i u and i v detected by the UV axis current sensors 23U and 23V provided between the generator inverter 24 and the generator 23.
- the UVW phase By converting the UVW phase to the dq axis, the dq axis current measured values I d and I q are generated. Since the sum of the current vectors of the UVW phase becomes zero, the currents of all the phases can be known by measuring the currents of two of the UVW phases (UV phase).
- a dq-axis adder 345d and 345q are provided after the current controller 343.
- the dq-axis adders 345d and 345q have dq-axis voltage command values V d * and V q * output from the current controller 343 and dq-axis non-interference control command values output from the non-interference controller 346, respectively.
- Add V d_dcpl * and V q_dcpl * to generate the final dq axis voltage command values V d *' and V q *' .
- the non-interfering controller 346 receives the inputs of the dq-axis current measured values I d and I q from the three-phase two-phase current converter 344, and cancels the interference component generated between the d-axis and the q-axis. Calculate the dq-axis non-interference control command values V d_dcpl * and V q_dcpl * required for this purpose.
- the two-phase three-phase voltage converter 347 When the two-phase three-phase voltage converter 347 receives the final dq-axis voltage command values V d *' and V q *' output from the dq-axis adder 345d and 345q, the UVW from the dq-axis to these inputs. By converting to a phase, the UVW phase voltage command values V u * , V v * , and V w * are calculated. Then, the two-phase three-phase voltage converter 347 outputs the UVW phase voltage command values V u * , V v * , and V w * to the generator inverter 24.
- the generator inverter 24 performs PWM control according to the UVW phase voltage command values V u * , V v * , and V w * . As a result, the AC power generated by the generator 23 is converted into DC power and supplied to the drive system 10.
- the plant 200 outputs the generated power to the drive system 10 in response to the input of the final torque command value T fin * , and feeds back the actual rotation speed ⁇ G of the generator 23 to the power generation controller 341. Will be made to.
- FIG. 3 is a block diagram showing control by the power generation controller 341.
- the power generation controller 341 is shown by an alternate long and short dash line, and the plant 200 to be controlled is shown.
- the power generation controller 341 inputs a rotation speed command value ⁇ G * from the system controller 31, a feedback input of the actual rotation speed ⁇ G from the generator 23 constituting the plant 200, and a misfire determination flag of the engine 21.
- the final torque command value T fin * which is the command value for the plant 200, is output.
- the misfire determination flag FLG is detected, for example, by detecting an abnormality in the rotational speed of the engine 21 in the system controller 31.
- the power generation controller 341 includes a rotation speed control unit 51, a vibration damping control unit 52, and a vibration damping control switching determination unit 53.
- the rotation speed control unit 51 receives the rotation speed command value ⁇ G * generated by the system controller 31 (not shown in FIG. 3) and the actual rotation speed ⁇ G of the generator 23 which is a part of the plant 200.
- the rotation speed control unit 51 performs PI control so that the actual rotation speed ⁇ G becomes the rotation speed command value ⁇ G * , and generates a torque command value T * for performing the rotation speed control, for example.
- the torque command value T * is output to the vibration damping control unit 52.
- the vibration damping control unit 52 feedforward (F / F) control and feedback (F / B) control are performed.
- the vibration damping control unit 52 includes a model matching unit 521 related to F / F control, an F / F switch 522, a disturbance observer 523 related to F / B control, and an F / B switch 524.
- the model matching unit 521 is composed of a Gm (s) / Gp (s) filter, and performs F / F control that suppresses vibration of the transmission system. That is, by performing a Gm (s) / Gp (s) filter process on the torque command value T * , F / F control having a high vibration damping effect is performed, and a model matching torque T mm is generated.
- Gp (s) is a model showing transmission characteristics in the plant 200 (generator 23) with torque T as an input and rotation speed ⁇ G as an output.
- Gm (s) is a model (ideal model) showing transmission characteristics in an ideal plant 200 with torque T as an input and rotation speed ⁇ G as an output.
- the F / F switch 522 switches whether or not the model matching unit 521 filters the torque command value T * output from the rotation speed control unit 51 in response to the input from the vibration damping control switching determination unit 53.
- the model matching torque T mm that has passed through the model matching unit 521 is output as the F / F torque T ff .
- the torque command value T * is output as the F / F torque T ff without passing through the model matching unit 521.
- the F / F torque T ff is an example of the first command value.
- the disturbance observer 523 includes a disturbance estimation block 5231, a subtractor 5232, and an F / B filter 5233.
- the disturbance observer 523 calculates the disturbance estimated torque T dist_est based on the input of the final torque command value T fin * from the F / F switch 522 and the actual rotation speed ⁇ G from the plant 200.
- the detailed configuration is as follows.
- the disturbance estimation block 5231 performs a process using the transmission characteristic Gp (s) of the plant 200 on the final torque command value T fin * output from the F / F switch 522 to obtain the rotation speed estimation value ⁇ Gest . calculate.
- the subtractor 5232 calculates the deviation ⁇ G by subtracting the actual rotation speed ⁇ G output from the plant 200 from the rotation speed estimation value ⁇ Gest calculated by the disturbance estimation block 5231.
- the rotation speed estimated value ⁇ Gest is a value according to the command value and the actual rotation speed ⁇ G is a measured value
- F / B control can be performed based on the deviation ⁇ G between the two.
- the F / B filter 5233 calculates the disturbance estimated torque T dist_est by performing a filter process on the deviation ⁇ G calculated by the subtractor 5232.
- the F / B filter 5233 has H (s) / Gp (s), which is 1 / Gp (s) which is the inverse characteristic of the transmission characteristic Gp (s) of the plant 200, and the center frequency of the plant 200. It is composed of a bandpass filter H (s) having a characteristic matching the resonance frequency.
- the resonance frequency of the plant 200 is a resonance frequency caused by the torsional vibration generated in the attenuator 22.
- the F / B switch 524 switches whether or not the disturbance estimation torque T dist_est calculated by the disturbance observer 523 is applied in response to the input from the vibration damping control switching determination unit 53.
- the disturbance estimated torque T dist_est is output as the F / B torque T fb .
- the F / B switch 524 is off, the zero torque T 0 is output as the F / B torque T fb .
- the F / B torque T fb is an example of the second command value.
- the adder 525 adds the F / F torque T ff output from the F / F switch 522 and the F / B torque T fb output from the F / B switch 524, and the final torque command value T fin *. Is output.
- the final torque command value T fin * output from the adder 525 is input to the plant 200 after being affected by the disturbance d.
- the disturbance d is modeled and shown to be affected via the adder 200a.
- the vibration damping control switching determination unit 53 switches the F / F switch 522 and the F / B switch 524 in the vibration damping control unit 52. The details of this switching control are shown in FIG.
- FIG. 4 is a flowchart showing the vibration damping control switching control by the vibration damping control switching determination unit 53.
- the vibration damping switching control is stored as a program in the controller constituting the control system 30.
- step S1 the vibration damping control switching determination unit 53 determines whether or not the misfire determination flag FLG indicating the misfire of the engine 21 has been received from the system controller 31.
- the vibration damping control switching determination unit 53 receives the misfire determination flag FLG (S1: Yes)
- the vibration damping control switching determination unit 53 then performs the process of step S2.
- the vibration suppression control switching determination unit 53 then performs the process of step S3.
- step S2 the vibration damping control switching determination unit 53 turns off both the F / F switch 522 and the F / B switch 524, and stops the vibration damping control of both the F / F and the F / B.
- step S3 the vibration damping control switching determination unit 53 turns on both the F / F switch 522 and the F / B switch 524, and starts the vibration damping control of both the F / F and the F / B.
- the vibration damping control switching determination unit 53 operates with both the F / F switch 522 and the F / B switch 524 turned on. That is, F / F control and F / B control are performed, the model matching torque T mm is output as the F / F torque T ff , and the disturbance estimated torque T dist_est is output as the F / B torque T fb .
- the torsional natural vibration component in the attenuator 22 and the periodic disturbance (torque pulsation, etc.) from the engine 21 can be suppressed at the same time.
- the vibration damping control switching determination unit 53 operates with both the F / F switch 522 and the F / B switch 524 turned off. That is, F / F control and F / B control are not performed, the torque command value T * used for rotation speed control is output as F / F torque T ff , and zero torque T 0 is output as F / B torque T fb . Will be done.
- the vibration suppression control switching determination unit 53 turns off both the F / F switch 522 and the F / B switch 524 to avoid system resonance, and as a result, the input of the twist angle in the attenuator 22 has an allowable range. Since it is possible to suppress the occurrence of bottom thrust without exceeding it, it is possible to prevent the occurrence of system resonance.
- FIG. 5 is a timing chart showing the driving state of the power generation system 20 of the comparative example.
- the vibration damping control switching determination unit 53 as in the present embodiment is not provided, and the vibration damping control using the F / F control and the F / B control is performed in all time zones. It is assumed that it has been damaged.
- FIG. 6 is a diagram showing a driving state of the power generation system 20 of the present embodiment. Therefore, the vibration damping control switching determination unit 53 is provided, and the vibration damping control is stopped when the engine 21 misfires.
- FIGS. 5 and 6 show changes in three types of parameters, from the top, the rotation speed of the engine 21, the driving torque of the generator 23, and the torsional torque of the attenuator 22.
- the torque generated by the generator 23 and the torsional torque in the attenuator 22 when the rotation speed of the engine 21 is swept so as to increase with time are shown.
- the amplitude generated in torque is smaller in the example of FIG. 6 than in the example of FIG. 5, especially in the time zone near the center of the figure. Therefore, since the torque in the attenuator 22 does not exceed the allowable range (bottom thrust does not occur), the increase in the torsion angle of the shaft between the engine 21 and the generator 23 is suppressed, and the frequency other than the natural frequency is suppressed. It is possible to suppress the occurrence of system resonance caused by the components.
- the generator controller 34 may control the rotation speed of the engine 21.
- the electric vehicle 100 in which the control method of the first embodiment is used is a series hybrid type in which the drive system 10 and the power generation system 20 are connected in series, and finally controls the rotation speed of the generator 23 of the power generation system 20. This is performed using the torque command value T fin * .
- the rotation speed command value ⁇ G * obtained according to the state of the drive system 10 is obtained. Then, in the power generation controller 341, the rotation speed control unit 51 is obtained with a torque command value T * so that the rotation speed ⁇ G of the generator 23 becomes the rotation speed command value ⁇ G * , and the vibration suppression control unit 52 is used.
- the final torque command value T fin * is calculated by performing vibration suppression control with respect to the torque command value T * .
- the vibration damping control switching determination unit 53 should not perform vibration damping control. By switching, system resonance can be suppressed.
- the torsion angle of the attenuator 22 connecting the engine 21 and the generator 23 exceeds the permissible range, and the torque of the engine 21 is not properly transmitted to the generator 23. Large vibration and noise may occur.
- the system resonance is suppressed by turning off the vibration damping control by the vibration damping control switching determination unit 53, it is possible to suppress the occurrence of an abnormality in torque transmission in the attenuator 22.
- vibration damping control can be performed for the torsional natural vibration component of the attenuator 22 and periodic disturbance (torque pulsation, etc.) from the engine 21.
- the model matching unit 521 is a model which is the first command value by performing feedback control for reducing the torsional vibration component.
- the matching torque T mm is calculated, and the deviation ⁇ G between the estimated rotation speed ⁇ Gest and the actual rotation speed ⁇ G obtained based on the final torque command value T fin * is estimated as a disturbance, and the disturbance is suppressed.
- the disturbance estimated torque T dist_est which is the second command value, is obtained.
- the adder 525 calculates the final torque command value T fin * by adding the model matching torque T mm and the disturbance estimated torque T dist_est . In this way, by combining F / F control and F / B control, vibration damping control can be performed more effectively.
- the natural vibration component of the attenuator 22 and the periodic disturbance (torque pulsation, etc.) from the engine 21 can be suppressed, so that the natural vibration of the plant 200 can be suppressed.
- the components are suppressed, and the power generation system 20 can be stably driven.
- FIG. 7 is a block diagram showing control by the power generation controller 341 of the second embodiment. Compared with the block diagram of the power generation controller 341 of the first embodiment shown in FIG. 3, the input to the vibration damping control switching determination unit 53 is changed to the rotation speed ⁇ G output from the plant 200. ..
- FIG. 8 is a flowchart showing the vibration damping control switching control by the vibration damping control switching determination unit 53.
- step S1 the vibration damping control switching determination unit 53 determines whether or not the rotation speed ⁇ G output from the plant 200 is larger than the predetermined threshold value ⁇ Gth .
- the threshold value ⁇ Gth is the rotation speed of the generator 23 having a high possibility of misfire of the engine 21 or the like. Therefore, when the rotation speed ⁇ G of the engine 21 is larger than the predetermined threshold value ⁇ Gth , there is a high possibility that system resonance will occur.
- the vibration damping control switching determination unit 53 When the rotation speed ⁇ G is larger than the predetermined threshold value ⁇ Gth (S1: Yes), the vibration damping control switching determination unit 53 then performs the process of step S2 to suppress the vibration damping control. On the other hand, when the rotation speed ⁇ G is not larger than the predetermined threshold value ⁇ Gth (S1: No), the vibration damping control switching determination unit 53 performs the process of step S3 to perform the vibration damping control.
- the vibration damping control switching determination unit 53 operates with both the F / F switch 522 and the F / B switch 524 turned on.
- the vibration damping control switching determination unit 53 operates with both the F / F switch 522 and the F / B switch 524 turned off.
- the engine 21 is used only for power generation, unlike a relatively large engine connected to the drive wheels, there is a high possibility of misfire.
- vibrations other than the natural vibration component periodic disturbance
- system resonance will occur. Therefore, when the rotation speed ⁇ G of the generator 23 is relatively large, such as when the engine 21 is burning, the system resonance can be reduced by suppressing the vibration damping control. As a result, the input of the allowable range of twist angle in the attenuator 22 is avoided, and as a result, the generation of large vibration (bottom thrust) can be suppressed.
- the generator 23 Comparing the rotation speed ⁇ G and the combustion state at the time of starting the engine 21, the generator 23 is first driven as a starter to start rotation (motoring). After that, the rotation speed ⁇ G increases and the engine 21 is ignited, and when the rotation speed ⁇ G further increases, the engine 21 burns stably (firering).
- the threshold value ⁇ Gth as the rotation speed at which combustion starts after motoring and turning off the damping control when the rotation speed ⁇ G is larger than the threshold value ⁇ Gth , system resonance caused by misfire can be prevented. It can be suppressed, and as a result, the bottom thrust of the attenuator 22 can be prevented.
- the vibration (periodic disturbance) other than the natural vibration component is caused by the misfire of the engine 21 or the like. Since there is a high possibility that the resulting system resonance will occur, vibration damping control is suppressed. As a result, the occurrence of system resonance is suppressed, and as a result, the input of the allowable range of torsion angle in the attenuator 22 is avoided, and the generation of large vibration due to bottom thrust can be suppressed.
- the vibration control controlled command value is input to the plant 200, so that the vibration control effect against the torsional natural vibration component of the attenuator 22 and the periodic disturbance from the engine 21 (engine torque pulsation, etc.) can be achieved. Can be done.
- the rotation speed ⁇ G as compared with the case of performing the misfire determination, the time required for the switching determination of the vibration damping control is shortened. As a result, when periodic disturbance occurs, the vibration damping control can be turned off earlier, so that the occurrence of system resonance can be suppressed.
- the threshold value ⁇ Gth used for the switching determination of the vibration damping control using the rotation speed ⁇ G is set to the rotation speed at which the motoring is performed and the combustion (fa) after the motoring. Set at the boundary with the starting rotation speed of the earring).
- the rotation speed ⁇ G is larger than the threshold value ⁇ Gth , the firing of the engine 21 is in the stage of starting, so that the system resonance caused by the misfire is more likely to occur than the motoring state. Therefore, by turning off the vibration damping control, it is possible to suppress the occurrence of system resonance caused by misfire.
- FIG. 9 is a block diagram showing control by the power generation controller 341 of the third embodiment. Compared with the block diagram of the power generation controller 341 of the second embodiment shown in FIG. 3, the output of the plant 200 is input from the integrator 54 to the vibration damping control switching determination unit 53.
- the integrator 54 when the integrator 54 receives the input of the rotation speed ⁇ G from the plant 200 and the final torque command value T fin * from the adder 525, the integrator 54 integrates both and outputs P to the vibration damping control switching determination unit. Output to 53.
- FIG. 10 is a flowchart showing vibration damping control switching control by the vibration damping control switching determination unit 53.
- step S1 the vibration damping control switching determination unit 53 determines whether or not the output P of the plant 200 is positive. When the output P is positive (S1: Yes), the vibration damping control switching determination unit 53 then performs the process of step S2 to suppress the vibration damping control. On the other hand, when the output P is negative (S1: No), the vibration damping control switching determination unit 53 performs the processing of step S3 to perform vibration damping control.
- the vibration damping control switching determination unit 53 operates with both the F / F switch 522 and the F / B switch 524 turned on.
- the vibration damping control switching determination unit 53 operates with both the F / F switch 522 and the F / B switch 524 turned off.
- the product of the rotation speed ⁇ G and the final torque command value T fin * is used as the output P, but the output is not limited to this.
- the product of and ( Id ⁇ V d * + I q ⁇ V q * ) may be used as the output P.
- the generator 23 when the output P of the generator 23 is small, the generator 23 is generating electricity, so that the engine 21 is firing and is unique due to a misfire or the like. Since there is a high possibility that system resonance due to vibration (periodic disturbance) other than the vibration component will occur, vibration suppression control is suppressed. As a result, the generation of system resonance is suppressed, and as a result, the input of the allowable range of twist angle in the attenuator 22 is avoided and the generation of large vibration is suppressed, and as a result, the system caused by vibration other than the natural vibration component is suppressed. The occurrence of resonance can be suppressed. On the other hand, when the output P of the generator 23 is relatively large, the engine 21 is motorized, and vibrations other than the natural vibration component are unlikely to occur, and system resonance is unlikely to occur. Vibration can be reduced.
- the threshold value P th used for the switching determination of the vibration damping control using the output P of the generator 23 is set to zero.
- the firing / motoring state of the engine 21 and the power generation / regeneration state of the generator 23 are associated with each other.
- the system resonance is performed by turning off the vibration damping control. Can be suppressed.
- the presence or absence of vibration damping control was switched using the misfire determination flag FLG in the first embodiment, the rotation speed ⁇ G in the second embodiment, and the output P of the plant 200 in the third embodiment. Not exclusively. When there is a possibility that system resonance caused by vibration (periodic disturbance) other than the natural vibration component of the plant 200 may occur, the system resonance can be suppressed by omitting the vibration damping control.
- determination conditions in the first to third embodiments may be used individually or may be combined to determine the presence or absence of vibration damping control.
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Abstract
Description
図1は、第1実施形態に係る電動車両の概略図である。
第1実施形態においては、エンジン21の失火時に制振制御が抑制される例が説明されたが、これに限らない。第2実施形態においては、制振制御が抑制される条件として、回転数が比較的高い場合の例について説明する。
第2実施形態においては、制振制御が抑制される条件として、回転数が比較的高い場合の例が説明されたが、これに限らない。第3実施形態においては、制振制御が抑制される条件として、プラント200(エンジン21/発電機23)の出力を用いる例について説明する。
Claims (8)
- エンジンと駆動軸が接続され、前記エンジンと連れ回るように構成された発電機を含む発電系と、前記発電系と接続され、充電可能に構成されたバッテリからの電力供給を受けて駆動する駆動系と有するハイブリッド車両の制御方法であって、
前記駆動系の状態に応じて、前記発電系に対する回転数指令値を求め、
前記発電系の回転数が前記回転数指令値となるように、前記発電系に対するトルク指令値を求め、
前記トルク指令値に対して、前記エンジンと前記発電機との接続部において生じる固有振動成分を抑制する制振制御を行い、前記発電系に対する最終トルク指令値を算出し、
前記固有振動成分とは異なる成分の振動に起因するシステム共振が発生しうる場合には、前記制振制御を行わずに、前記トルク指令値を前記最終トルク指令値とする、ハイブリッド車両の制御方法。 - 請求項1に記載のハイブリッド車両の制御方法であって、
前記制振制御において、
前記トルク指令値に対して前記固有振動成分を低減するフィードフォワード制御を行うことにより第1指令値を求め、
前記最終トルク指令値に基づいて推定される回転数推定値と回転数測定値との差分から外乱を求め、前記外乱が抑制されるようにフィードバック制御を行うことにより第2指令値を求め、
前記第1指令値と前記第2指令値とを加算することで、前記最終トルク指令値を算出する、ハイブリッド車両の制御方法。 - 請求項1または2に記載のハイブリッド車両の制御方法であって、
前記システム共振の起因となる振動が発生しうる場合は、前記エンジンの失火が検出される場合である、ハイブリッド車両の制御方法。 - 請求項1または2に記載のハイブリッド車両の制御方法であって、
前記システム共振の起因となる振動が発生しうる場合は、前記エンジンの回転数が回転数閾値を上回る場合である、ハイブリッド車両の制御方法。 - 請求項4に記載のハイブリッド車両の制御方法であって、
前記回転数閾値は、前記エンジンの安定的な燃焼が開始される回転数である、ハイブリッド車両の制御方法。 - 請求項1または2に記載のハイブリッド車両の制御方法であって、
前記システム共振の起因となる振動が発生しうる場合は、前記発電系の出力が出力閾値を上回る場合である、ハイブリッド車両の制御方法。 - 請求項6に記載のハイブリッド車両の制御方法であって、
前記出力閾値はゼロである、ハイブリッド車両の制御方法。 - エンジンと駆動軸が接続され、前記エンジンと連れ回るように構成された発電機を含む発電系と、前記発電系と接続され、充電可能に構成されたバッテリからの電力供給を受けて駆動する駆動系と、を有するハイブリッド車両において、前記発電系を制御するコントローラを備えるハイブリッド車両の制御装置であって、
前記コントローラは、
前記駆動系の状態に応じて、前記発電系に対する回転数指令値を求め、
前記発電系の回転数が前記回転数指令値となるように、前記発電系に対するトルク指令値を求め、
前記トルク指令値に対して、前記エンジンと前記発電機との接続部において生じる固有振動成分を抑制する制振制御を行い、前記発電系に対する最終トルク指令値を算出し、
前記固有振動成分とは異なる成分の振動に起因するシステム共振が発生しうる場合には、前記制振制御を行わずに、前記トルク指令値を前記最終トルク指令値とする、ハイブリッド車両の制御装置。
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MX2023002184A MX2023002184A (es) | 2020-08-24 | 2020-08-24 | Metodo de control de vehiculo hibrido y dispositivo de control de vehiculo hibrido. |
JP2022544911A JP7409514B2 (ja) | 2020-08-24 | 2020-08-24 | ハイブリッド車両の制御方法、及び、ハイブリッド車両の制御装置 |
CN202080103383.9A CN115867449B (zh) | 2020-08-24 | 2020-08-24 | 混合动力车辆的控制方法及混合动力车辆的控制装置 |
BR112023003367A BR112023003367A2 (pt) | 2020-08-24 | 2020-08-24 | Método de controle de veículo híbrido e dispositivo de controle de veículo híbrido |
US18/042,609 US11851046B2 (en) | 2020-08-24 | 2020-08-24 | Hybrid vehicle control method and hybrid vehicle control device for suppressing system resonance other than natural vibration |
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