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Speed prediction algorithm for automobile navigation

A speed prediction and car navigation technology, applied in the field of speed prediction algorithms for car navigation, can solve problems such as difficulty in quickly and accurately predicting speed, and achieve the effects of fast calculation speed, small calculation amount, and improved estimation accuracy

Active Publication Date: 2019-02-15
HANGZHOU ZHONGHENG ELECTRIC CO LTD
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AI Technical Summary

Problems solved by technology

[0003] In the past algorithm, in the car navigation system, it is difficult to quickly and accurately predict the speed of the car when driving along a planned path in a short time in the future, and the accuracy of speed prediction plays a very important role in the navigation system

Method used

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  • Speed prediction algorithm for automobile navigation
  • Speed prediction algorithm for automobile navigation

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Experimental program
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Embodiment

[0026] Embodiment: a kind of speed prediction algorithm that is used for car navigation of this embodiment, as figure 1 shown, including the following steps:

[0027] S1: Establish the vehicle speed prediction system model, the formula of the vehicle speed prediction system model is as follows:

[0028]

[0029] Among them, the state quantity X k Indicates the speed of the vehicle at time k, and the observation Z k Indicates the number of vehicles on the road observed at time k, L indicates the length of the road, K * Indicates the congestion coefficient at the time of maximum traffic flow; V * Indicates the maximum speed limit of this road vehicle (for example, 60KM / h), w k-1 and v k represent process noise and observation noise, respectively;

[0030] Calculate the congestion coefficient K at the maximum traffic flow according to the length L of the road section and the number D of vehicles at the maximum traffic flow * , K * =L / D;

[0031] S2: Obtain the congest...

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Abstract

The invention discloses a speed prediction algorithm for an automobile navigation. The speed prediction algorithm comprises the following steps of: (1) establishing a prediction system model for the vehicle speed; (2) determining a state quantity initial value and a covariance initial value of the prediction system model for the vehicle speed; and setting a desired initial value and a variance initial value of the process noise and the observation noise of the prediction system model for the vehicle speed; (3) calculating an updated state volume point and a predicted and measurement volume point propagated by the nonlinear observation equation; (4) calculating the observed noise expectation by using the Sage-Husa method; and estimating the observed noise variance of the system by using theSage-Husa method and the robust method at the same time; and (5) predicting the traveling speed of the vehicle in the future along the target road by utilizing a volume Kalman filtering technology. According to the speed prediction algorithm for the automobile navigation, the algorithm can quickly and accurately predict the speed of the vehicle when driving along a certain planning path in the future; the calculation amount is small; the calculation speed is high; and meanwhile, the requirement for storage space is low.

Description

technical field [0001] The invention relates to the technical field of speed prediction in car navigation systems, in particular to a speed prediction algorithm for car navigation. Background technique [0002] Compared with traditional fuel vehicles, electric vehicles have the advantages of environmental protection and high efficiency, but due to the impact of battery capacity, they also have the disadvantages of long charging time and short cruising range. Therefore, in the actual daily driving process, electric vehicle owners often have the need to look for charging piles. In the navigation process of finding the best charging pile around the electric vehicle and planning the best route, the first thing to consider is whether the current remaining power of the electric vehicle can reach the target charging pile. This requires the navigation system to be able to accurately predict the speed of the car traveling along a certain planned route, and then calculate the time re...

Claims

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Application Information

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IPC IPC(8): G01C21/34G06Q10/04G06Q50/30
CPCG06Q10/04G01C21/3492G06Q50/40
Inventor 郭宸姜淏予葛泉波
Owner HANGZHOU ZHONGHENG ELECTRIC CO LTD
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