CN105667241A - Intelligent emergency shock absorption system of automobile - Google Patents

Abstract

The invention belongs to the field of automobile component manufacturing, and discloses an intelligent emergency shock absorption system of an automobile. The shock absorption system consists of an optical measurement and photographing system, an electrical control system and a mechanical and hydraulic shock absorption system, wherein the optical measurement and photographing system is mounted in front of an inner front wheel of an automobile body and is used for acquiring automobile leaping height information; a single-chip microcomputer of the electrical control system starts an automatic adjustment system to identify an image and establish an input signal model, calculate a response moment by a trisection interpolation algorithm, then calculate equivalent damping by enlarging the response moment through the reverse method, send a digital damping adjustment instruction, calculate a specific regulating quantity of a throttling valve according to the equivalent damping, and finally, transmit the specific regulating quantity of the throttling valve to the mechanical and hydraulic shock absorption system, so that the damping of a hydraulic shock absorber is adjusted by adjusting the flow of the throttling valve. The shock absorption system integrates machinery, electronics, hydraulics and optics and can intelligently control the damping of the hydraulic shock absorber at proper time through the single-chip microcomputer, and is particularly suitable for the automobile to run on a complicated feature landform.

Description

The emergent vibration insulating system of a kind of automobile intelligent

Technical field

The present invention relates to the emergent vibration insulating system of a kind of automobile intelligent and control method, can be applicable to the emergent vibration damping that automobile is hit suddenly in process, belong to automobile component and manufacture field.

Background technology

The universal of family is entered recently as automobile; vehicle accident is increasing therewith; thrust the highway horizontal bar accident such as fall in hillside, overpass that drops to happen occasionally; for ensureing safety; people have higher requirement for the security performance of automobile; except air bag for protection when collision scenario, it is also desirable to have another measure can play important protective effect in there is unexpected accident. And buffering shock-absorbing device is installed on automobile and just can solve this problem. When burst is fallen, vibration absorber plays good buffering, can be effectively improved the safety of automobile. Additionally, in a lot of thrilling sports, as: during motor-cross is driven, due to road bumpiness, sometimes have the leap of bigger height, in this case, emergent timely adjustment vibration insulating system is necessary, has had this system can complete some exceedingly difficult movements. At present, along with the fast development of auto industry, more and more higher for the high-performance of automobile, high reliability request, thus, for can the demand of timely adjustment vibration insulating system constantly rise, the emergent vibration insulating system of automobile intelligent will have wide market application foreground.

Summary of the invention

Based on currently available technology situation, it is an object of the invention to provide the emergent vibration insulating system of a kind of automobile intelligent, increase a insurance system, it is ensured that driver's safety.

For realizing the object of the invention, optical measurement and photographic system are combined by the present invention with electric control system, adopt computer program to control automobile mechanical and liquid-springing system, and concrete technical solution is as follows:

The emergent vibration insulating system of described automobile intelligent is by optical measurement and photographic system, electric control system, machinery and liquid-springing system three part composition, optical measurement and photographic system connect electric control system, electric control system connects machinery and liquid-springing system, electric control system includes automatic regulating system, image identification system, machinery and liquid-springing system include regulating choke valve, hydraulic buffer, it is characterized in that, it is arranged in car body by optical measurement and photographic system front, gather automobile leap elevation information, automatic regulating system is opened by the single-chip microcomputer of electric control system, input signal model is set up to carrying out image recognition, trisection interpolation algorithm is adopted to calculate the response moment, by amplifying response moment reverse equivalent damping, then digitized damping regulating command is sent, the concrete regulated quantity of choke valve is calculated further by equivalent damping, finally, the concrete regulated quantity of stream valve is transferred to machinery and liquid-springing system, by regulating the damping of the Flow-rate adjustment hydraulic buffer of choke valve, thus playing vibration damping, the effect of buffering.

Preferred version: described machinery and liquid-springing system are positioned at vehicle body, between four wheels.

Response moment algorithm steps is as follows:

(1) initial unimodal interval [a, b] is determined by advance and retreat method.

(2) the iterations K of required calculating is determined according to iteration precision ε.

$K\≥\frac{ln\left(\frac{\mathrm{\ϵ}}{b-a}\right)}{ln\frac{1}{3}}$

(3) by interval trisection, two some x are inserted at Along ent place₁,x₂。

$\left\{\begin{array}{c}{x}_1=a+\frac{1}{3}(b-a)\\ x_2=a+\frac{2}{3}(b-a)\end{array}\right.$

(4) calculate at x₁,x₂The functional value f at place₁,f₂。

$\left\{\begin{array}{c}{f}_1=f\left(x_1\right)\\ f_2=f\left(x_2\right)\end{array}\right.$

(5) region of search is shortened according to the comparison of functional value.

1) if f₁≤f₂, give up [x₂, b], obtain [a, x between new district₂], and do following displacement

b←x₂

2) if f₁>f₂, give up [a, x₁], obtain [x between new district₁, b], and do following displacement

a←x₁

(6) carry out convergence to judge.

1) if | b^(k)-a^(k)|≤ε, export optimal solution

$\left\{\begin{array}{c}{x}^{*}=\frac{a^{\left(k\right)}+b^{\left(k\right)}}{2}\\ f^{*}=f\left(x^{*}\right)\end{array}\right.$

2) if | b^(k)-a^(k)| > ε, continue iteration, it may be assumed that repeat (3) (5).

Concrete programming flow diagram is as shown in Figure 3.

The invention has the advantages that: this vibration insulating system melts machinery, electronics, hydraulic pressure, optics in one, the damping of in good time Based Intelligent Control hydraulic buffer by chip microcontroller, thus playing the effect of in good time vibration damping, increase a insurance system, improve automotive safety, reliability, ensure driver's safety well. In calculating response moment algorithm, trisection interpolation algorithm is simple, programming is convenient, computational accuracy is high, and under sacrificing certain calculation accuracy, it is possible to resolve complicated one-dimensional vibration problem, this vibration insulating system especially adapts to automobile and travels in complicated geomorphic feature.

Accompanying drawing explanation

Fig. 1 is the emergent vibration damping total system working situation schematic diagram of the present invention; 1 optical measurement and photographic system, 2 electric control systems, 3 machinery and liquid-springing systems.

Fig. 2 is the emergent vibration damping total system operation principle schematic diagram of the present invention.

Fig. 3 is the emergent vibration damping total system computer flow chart of the present invention.

Detailed description of the invention

For the present invention is better described, as follows for embodiment:

Embodiment 1

The emergent vibration insulating system of described automobile intelligent is by optical measurement and photographic system 1, electric control system 2, machinery and liquid-springing system 3 three part composition, optical measurement and photographic system 1 connect electric control system 2, electric control system 2 connects machinery and liquid-springing system 3, , machinery and liquid-springing system 3 are positioned at vehicle body, between four wheels, it is characterized in that, it is arranged in car body by optical measurement and photographic system 1 front, gather automobile leap elevation information, automatic regulating system is opened by the single-chip microcomputer of electric control system, input signal model is set up to carrying out image recognition, trisection interpolation algorithm is adopted to calculate the response moment, by amplifying response moment reverse equivalent damping, then digitized damping regulating command is sent, the concrete regulated quantity of choke valve is calculated further by equivalent damping, finally, the concrete regulated quantity of stream valve is transferred to machinery and liquid-springing system, by regulating the damping of the Flow-rate adjustment hydraulic buffer of choke valve, thus playing vibration damping, the effect of buffering.

Described optical measurement and photographic system adopt optical measuring instrument and digital camera connected mode to carry out information gathering.

Response moment example is as follows:

For certain car by whole vibration response model after step excitation, the expression formula of its function is as follows:

Y (t)=0.0005 [1-e^-1.5t(cos1.94t+0.77sin1.94t)]

Convergence precision ε=0.08, asks this car vibration peak response moment.

Solve: by this model conversation for asking with minor function minimum problem

F (t)=e^-1.5t(cos1.94t+0.77sin1.94t)-1

First application advance and retreat method determines the unimodal interval of this function, initial point t₀=0, initial step length α₀=0.1. Calculating process is as shown in table 1.

Table 1 method of retreating determines the unimodal interval computation process of this function

t	0	0.1	0.3	0.7	1.5	3.1
							f(t)	0	-0.028	-0.197	-0.663	-1.084	-0.993

By above calculating, unimodal interval [a, b]=[0.7,3.1] of this function.

According to:

So, trisection optimized algorithm needs iteration 9 times.

According to:

So, golden section optimized algorithm needs iteration 8 times.

According to higher mathematics, function is sought first derivative

Economics analysis optimal solution is tried to achieve in f ' (t)=0: t=1.6183

Trisection interpolation algorithm iterative process is as shown in table 2.

Table 2 trisection interpolation algorithm iterative process

$t^{*}=\frac{a^{\left(9\right)}+b^{\left(9\right)}}{2}=\frac{1.5873+1.6498}{2}=1.6186$

Golden cut algorithm iterative process is as shown in table 3.

Table 3 golden cut algorithm iterative process

$t^{*}=\frac{a^{\left(8\right)}+b^{\left(8\right)}}{2}=\frac{1.5973+1.6483}{2}=1.6228$

Trisection interpolation algorithm and the contrast of golden bisection interpolation algorithm result of calculation are as shown in table 4.

Table 4 trisection interpolation algorithm and the contrast of golden cut algorithm result of calculation

As seen from Table 4, although, trisection interpolation algorithm iteration more than golden cut algorithm 1 time, but under the requirement of identical convergence precision, trisection interpolation algorithm computational accuracy significantly improves, and is only 0.02% with the relative error of theoretical value.

Claims (2)

1. the emergent vibration insulating system of automobile intelligent, by optical measurement and photographic system, electric control system, machinery and liquid-springing system three part composition, optical measurement and photographic system connect electric control system, electric control system connects machinery and liquid-springing system, electric control system includes automatic regulating system, image identification system, machinery and liquid-springing system include regulating choke valve, hydraulic buffer, it is characterized in that, it is arranged in car body by optical measurement and photographic system front, gather automobile leap elevation information, automatic regulating system is opened by the single-chip microcomputer of electric control system, input signal model is set up to carrying out image recognition, trisection interpolation algorithm is adopted to calculate the response moment, by amplifying response moment reverse equivalent damping, then digitized damping regulating command is sent, the concrete regulated quantity of choke valve is calculated further by equivalent damping, finally, the concrete regulated quantity of stream valve is transferred to machinery and liquid-springing system, by regulating the damping of the Flow-rate adjustment hydraulic buffer of choke valve.

2. the emergent vibration insulating system of automobile intelligent as claimed in claim 1, it is characterised in that described machinery and liquid-springing system are between four wheels of vehicle body.