CN105046070A - Method for constructing city comprehensive working condition with turning performance - Google Patents
Method for constructing city comprehensive working condition with turning performance Download PDFInfo
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- CN105046070A CN105046070A CN201510393425.8A CN201510393425A CN105046070A CN 105046070 A CN105046070 A CN 105046070A CN 201510393425 A CN201510393425 A CN 201510393425A CN 105046070 A CN105046070 A CN 105046070A
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Abstract
The invention discloses a method for constructing a city comprehensive working condition with a turning performance, and belongs to the field of intelligent traffics. The method comprises: obtaining vehicle driving information of a predetermined vehicle; selecting vehicle driving information of a turning motion segment; according to the vehicle driving information of the turning motion segment, obtaining a turning motion property of a turning position of the vehicle; using the obtained turning motion property to replace a working condition segment of a same-speed characteristic in the stored city comprehensive working condition so as to obtain the city comprehensive working condition with the turning performance; and according to different road grades and different turning radiuses, adding a turning driving condition into the city comprehensive working condition to enable the city comprehensive working condition to better meet the requirement of a real driving state of the vehicle in a city.
Description
Technical field
The invention belongs to intelligent transportation field, particularly a kind of city integrated operating mode construction method with turning performance.
Background technology
In recent years, the Chinese government, according to the guiding theory of building a resource-conserving and environment-friendly society, promotes the development of new-energy automobile energetically, and domestic car enterprise is that response country calls, and the respective hybrid power passenger car product of numerous and confused release also drops into demonstrating running.For hybrid vehicle, its controling parameters is very strong to the dependence of operating mode, and when controling parameters is identical, driving cycle changes, and its fuel economy often also has very big difference.For addressing this problem, when making working conditions change, hybrid vehicle still can have excellent fuel-economy sex expression, and operating mode's switch technology is arisen at the historic moment.
Many scholars have carried out correlative study to operating mode's switch technology both at home and abroad at present, Feng etc., Zhang Junzhi etc. have carried out certain research for state of cyclic operation to the impact of hybrid vehicle performance, describe operating mode's switch technology significant in Control Strategy for Hybrid Electric Vehicle is optimized.Luo Yutao etc. select operating mode time, distance and the max speed etc. as characteristic parameter, adopt clustering methodology, have carried out the research of operating mode's switch, propose the ADAPTIVE CONTROL of energy adaptation condition change.The people such as the LinC of University of Michigan and the JeS of Seoul National University respectively for have in 6 certain representational driving cycle and wherein 24 characteristic parameters study, adopt Hamming neural network to carry out the identification of operating mode, and then call the Optimal Parameters corresponding with it.The people such as RezaL judge the current affiliated driving cycle of vehicle according to the long-term characteristic and Short-term characteristic that drive circulation, and according to the dissimilar of driver, suitable correction is carried out to torque, construct a kind of Intelligent Control Strategy based on traffic information and driver information.Generally speaking, how to carry out the selection of characteristic parameter and to mention, choosing the key that identification which kind of sorting algorithm carries out classifying and how carrying out operating mode is operating mode's switch technology.
For the definition of current vehicle working condition, be all based on speed-time curve usually.Document is not yet had to define the turning performance of vehicle in actual condition.But for an actual travel vehicle its occur that the situation of turning operating mode is very general, simultaneously during and control stability energy-conservation in the turning studying and discuss vehicle, the simple speed of a motor vehicle-time curve can not meet the demand of emulation experiment, and actual vehicle is when turning, not identical when its energy consumption and straight-line travelling.
Thus in the urgent need to a kind of construction method of the city operating mode's switch with turning performance, the problems referred to above are solved.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of city integrated operating mode construction method with turning performance cannot reflect the travel conditions problem of vehicle at municipal highway to make up existing vehicle working condition construction method comprehensively, according to different road quality classification, turning driving operating mode adds wherein by different radius of turn, the real conditions making it more meet vehicle to travel in city.
With the city integrated operating mode construction method of turning performance, it is characterized in that: comprise the following steps,
The vehicle traveling information of step one, acquisition preset vehicle, and described vehicle traveling information comprises: time of vehicle operation t, vehicle present position longitude X, vehicle present position latitude Y, vehicle instantaneous velocity v;
Step 2, choose the vehicle traveling information of turning motion fragment;
Comprise the following steps:
A, in described step one obtain vehicle traveling information carry out data prediction;
B, obtain car speed-time v-t curve and vehicle driving trace-time s-t curve according to described data prediction;
C, vehicle traveling information according to car speed-time v-t curve and vehicle driving trace-time s-t curve acquisition turning motion fragment;
Step 3, obtain the turning motion characteristic at turn inside diameter place according to the vehicle traveling information of the fragment of turning motion described in step 2;
Comprise the following steps:
A, select the characteristic parameter of reflection motion turning fragment in advance as evaluation criterion, analyze the characteristic parameter standard deviation of the vehicle traveling information of described turning motion fragment, the characteristic parameter of the reflection campaign turning fragment of described preliminary election is respectively: range ability S, maximal rate v
max, minimum speed of a motor vehicle v
min, average speed v
m, travelling speed v
mr, velocity standard difference v
sd, time of vehicle operation t, acceleration time t
a, deceleration time t
d, at the uniform velocity time t
c, peak acceleration a
max, minimum acceleration a
min, the average accelerating sections a of accelerating sections
m, braking section average retardation rate a
d, radius of turn R;
B, to be extracted by the characteristic parameter of principal component analysis (PCA) to the vehicle traveling information of described turning motion fragment, by the characteristic parameter extraction of the major component accumulation contribution rate of characteristic parameter to more than 80% out;
C, extracted characteristic parameter is carried out major component loading analysis, by calculating the related coefficient between major component and characteristic parameter, and the predetermined value of canonical correlation coefficient is 0.5, the characteristic parameter related coefficient of acquisition being greater than predetermined value retains, and is cast out by the characteristic parameter that the related coefficient of acquisition is less than predetermined value;
D, obtain car speed-time v-t curve and vehicle driving trace-time s-t curve and radius of turn-time R-t curve according to the characteristic parameter of above-mentioned steps gained by road quality classification and radius of turn, thus the turning motion characteristic at acquisition turn inside diameter place;
Step 4, the turning motion characteristic obtained through step one ~ step 3 is replaced the operating mode fragment having stored identical velocity characteristic in city integrated operating mode, thus obtain the city integrated operating mode with turning performance.
Gathered by the vehicle traveling information of GPS drive recorder to vehicle in described step one.
By above-mentioned design proposal, the present invention can bring following beneficial effect: the present invention, with the comprehensive operating mode construction method of turning performance, effectively compensate for the deficiency that can not meet the demand of emulation and experiment based on car speed-time curve when studying and discuss the energy-conservation and operational stability of the turning of vehicle that existing city integrated operating mode is simple.The present invention is with the data acquisition in the city integrated operating mode building process of turning performance, data prediction, the division of motion turning fragment, the characteristic parameter extraction of motion turning fragment, according to different road quality classification, turning driving operating mode adds wherein by different radius of turn, makes it more meet vehicle and travel real conditions in city.Improve vehicle analog case to energy consumption and dynamic property in simulation process further, effectively raise the simulation accuracy of auto model.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated:
Fig. 1 is the workflow diagram of the present invention with the city integrated operating mode construction method of turning performance.
Fig. 2 is the reference diagram of the present invention with the turn inside diameter Velocity-time v-t curve under the low vehicle speed condition of the city integrated operating mode construction method of turning performance.
Fig. 3 is the reference diagram of the present invention with the turn inside diameter displacement X-Y curve under the low vehicle speed condition of the city integrated operating mode construction method of turning performance.
Fig. 4 is the reference diagram of the present invention with the turn inside diameter track-time s-t curve under the low vehicle speed condition of the city integrated operating mode construction method of turning performance.
Fig. 5 is the reference diagram of the present invention with the turn inside diameter Velocity-time v-t curve under the medium vehicle speed condition of the city integrated operating mode construction method of turning performance.
Fig. 6 is the reference diagram of the present invention with the turn inside diameter displacement X-Y curve under the medium vehicle speed condition of the city integrated operating mode construction method of turning performance.
Fig. 7 is the reference diagram of the present invention with the turn inside diameter track-time s-t curve under the medium vehicle speed condition of the city integrated operating mode construction method of turning performance.
Fig. 8 is the reference diagram of the present invention with the system-wide section car speed-time v-t curve of the city integrated operating mode construction method of turning performance.
Fig. 9 the present invention moves the reference diagram of X-Y curve with the system-wide section of the city integrated operating mode construction method of turning performance.
Figure 10 the present invention is with the reference diagram of the system-wide section vehicle driving trace-time s-t curve of the city integrated operating mode construction method of turning performance.
Embodiment
Below in conjunction with accompanying drawing, inventive method is described in further details.
As shown in Figure 1, a selected common vehicle travelled in city, utilizes GPS drive recorder, gathers the driving information of many group vehicles in city, comprises the information such as time of vehicle operation t, vehicle present position longitude X, latitude Y, vehicle instantaneous velocity v.
By gained information initializing, carry out data processing, draw running time t, vehicle instantaneous velocity v (unit is m/s), is converted into XY coordinate system upper/lower positions by vehicle present position longitude and latitude, and initial position co-ordinates is (0,0).
After being disposed, the data obtained imports graphics software, and chart to obtain v-t (Velocity-time) two-dimensional curve and s-t (track-time) three-dimensional curve.Wherein turning fragment is start into curved vehicle in front speed the time point that obviously slows down, with the time point going out curved rear vehicle speed and start obviously to increase, turning fragment is won out, v-t (Velocity-time) two-dimensional curve and s-t (track-time) three-dimensional curve when drawing turning, as Fig. 2 ~ Fig. 9.
Each motion turning fragment is analyzed, mainly from vehicle driving trace s, time of vehicle operation t, average speed, vehicle instantaneous velocity v, and the standard deviation etc. describing instantaneous velocity v and acceleration is analyzed.By using for reference the definition of conventional truck kinematics fragment, and the characteristic parameter of 15 reflection motion segments is selected in advance as evaluation criterion in the basis of operating mode construction method before, and the characteristic parameter of motion segments comprises: range ability S, maximal rate v
max, minimum speed of a motor vehicle v
min, average speed v
m, travelling speed v
mr, velocity standard difference v
sd, time of vehicle operation t, acceleration time t
a, deceleration time t
d, at the uniform velocity time t
c, peak acceleration a
max, minimum acceleration a
min, the average accelerating sections a of accelerating sections
m, braking section average retardation rate a
d, radius of turn R.
Existing characteristic parameter is extracted.Application principal component analysis (PCA), the proportion that the variance calculating each major component is shared in whole major component variance, this value contribution rate describes this major component great integration capability, namely can reflect information contained by these 15 characteristic parameters number.By the characteristic parameter extraction of the major component accumulation contribution rate of characteristic parameter to more than 80% out, above-mentioned requirements can be met.Extracted characteristic parameter is carried out major component loading analysis, calculates the related coefficient between major component and characteristic parameter, if related coefficient is greater than 0.5, accept, otherwise refusal.
According to the characteristic parameter of above-mentioned steps gained, build the turning performance under different radius of turn and road quality classification from different motion segments.Under drawing different road quality classification, vehicle Velocity-time v-t curve and vehicle driving trace-time s-t curve and radius of turn-time R-t curve under different radius of turn, thus obtain the turning motion characteristic at turn inside diameter place;
The existing city integrated operating mode of comparative analysis, finds out car speed in existing city integrated operating mode and is arranged in turning operating mode the max speed v
maxwith minimum speed of a motor vehicle v
minbetween part, extract in obtaining portion turning operating mode feature parameter (the accelerating sections a as average in accelerating sections that same time Duan Yuyi builds between dividing
m, braking section average retardation rate a
d, peak acceleration a
max, minimum acceleration a
min) identical or similar portions, replace in existing city integrated operating mode by the city turning operating mode built with the identical or similar portions extracted, and enclose car speed-time v-t curve and vehicle driving trace-time s-t curve and radius of turn-time R-t curve, thus obtain the turning motion characteristic at turn inside diameter place, draw the city integrated operating mode with turning performance.
Comprehensive operating mode construction method with turning performance of the present invention, effectively compensate for the curve based on car speed-time that existing city integrated operating mode is simple, in the energy-conservation deficiency with the demand emulated and test can not be met during operational stability of the turning studying and discuss vehicle.In existing city integrated operating mode, according to different road quality classification, turning driving operating mode adds wherein by different radius of turn, makes it more meet vehicle and travel real conditions in city.
Claims (2)
1., with the city integrated operating mode construction method of turning performance, it is characterized in that: comprise the following steps,
The vehicle traveling information of step one, acquisition preset vehicle, and described vehicle traveling information comprises: time of vehicle operation t, vehicle present position longitude X, vehicle present position latitude Y, vehicle instantaneous velocity v;
Step 2, choose the vehicle traveling information of turning motion fragment;
Comprise the following steps:
A, in described step one obtain vehicle traveling information carry out data prediction;
B, obtain car speed-time v-t curve and vehicle driving trace-time s-t curve according to described data prediction;
C, vehicle traveling information according to car speed-time v-t curve and vehicle driving trace-time s-t curve acquisition turning motion fragment;
Step 3, obtain the turning motion characteristic at turn inside diameter place according to the vehicle traveling information of the fragment of turning motion described in step 2;
Comprise the following steps:
A, select the characteristic parameter of reflection motion turning fragment in advance as evaluation criterion, analyze the characteristic parameter standard deviation of the vehicle traveling information of described turning motion fragment, the characteristic parameter of the reflection campaign turning fragment of wherein preliminary election is respectively: range ability S, maximal rate v
max, minimum speed of a motor vehicle v
min, average speed v
m, travelling speed v
mr, velocity standard difference v
sd, time of vehicle operation t, acceleration time t
a, deceleration time t
d, at the uniform velocity time t
c, peak acceleration a
max, minimum acceleration a
min, the average accelerating sections a of accelerating sections
m, braking section average retardation rate a
d, radius of turn R;
B, to be extracted by the characteristic parameter of principal component analysis (PCA) to the vehicle traveling information of described turning motion fragment, by the characteristic parameter extraction of the major component accumulation contribution rate of characteristic parameter to more than 80% out;
C, extracted characteristic parameter is carried out major component loading analysis, by calculating the related coefficient between major component and characteristic parameter, and the predetermined value of canonical correlation coefficient is 0.5, the characteristic parameter related coefficient of acquisition being greater than predetermined value retains, and is cast out by the characteristic parameter that the related coefficient of acquisition is less than predetermined value;
D, obtain car speed-time v-t curve and vehicle driving trace-time s-t curve and radius of turn-time R-t curve according to the characteristic parameter of above-mentioned steps gained by road quality classification and radius of turn, thus the turning motion characteristic at acquisition turn inside diameter place;
Step 4, the turning motion characteristic obtained through step one ~ step 3 is replaced the operating mode fragment having stored identical velocity characteristic in city integrated operating mode, thus obtain the city integrated operating mode with turning performance.
2. the city integrated operating mode construction method with turning performance according to claim 1, is characterized in that: be gathered by the vehicle traveling information of GPS drive recorder to vehicle in described step one.
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| CN105975756B (en) * | 2016-04-28 | 2019-01-29 | 彩虹无线（北京）新技术有限公司 | A kind of zig zag Activity recognition method based on vehicle operation data |
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| CN108647836B (en) * | 2018-06-06 | 2021-11-12 | 哈尔滨思派科技有限公司 | Driver energy-saving evaluation method and system |
| CN109506946A (en) * | 2018-10-19 | 2019-03-22 | 中国汽车技术研究中心有限公司 | A kind of exploitation of RDE operating condition library and application method |
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| CN109409008A (en) * | 2018-11-23 | 2019-03-01 | 哈尔滨理工大学 | A kind of urban track traffic tool route typical rate-time driving cycle construction method |
| CN109409008B (en) * | 2018-11-23 | 2022-06-17 | 哈尔滨理工大学 | Construction method for typical speed-time running condition of urban rail vehicle line |
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| CN109960889A (en) * | 2019-04-03 | 2019-07-02 | 中车青岛四方车辆研究所有限公司 | Track vehicle route typical rate-time driving cycle construction method |
| CN109960890B (en) * | 2019-04-03 | 2023-02-03 | 中车青岛四方车辆研究所有限公司 | Method for constructing regional typical speed-time running working condition of rail vehicle |
| CN109960889B (en) * | 2019-04-03 | 2023-02-07 | 中车青岛四方车辆研究所有限公司 | Method for constructing typical speed-time running condition of track vehicle line |
| CN111222542A (en) * | 2019-12-17 | 2020-06-02 | 宁波工程学院 | Based on L1Regularized effective characteristic selection method for working condition of hybrid bus |
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Application publication date: 20151111 |