【正文】 y reflects,surveys the automobile radar lanch and the receive differential value,then may calculate the automobile vehicle speed turns the fast sensor to install in the transmission gearbox outer covering,acuates by the transmission gearbox output shaft,it is a pulse electrical machinery,procuces frequency and round intensive direct impiementing agency and so on is posed of the solenoid valve and the valve adjustment braking forve,with the aim of maintaining the ideal 西安工程大學(xué)畢業(yè)設(shè)計英文譯文 5 slipping kind of ABS may guarantee that the slipping rate ideal control,against holds the braking quality to be good,but because increased a velocity radar,there the structure is plex,the cost is also high. Single parameter control It take controls wheel39。s braking force,realizes against holds the dead brake,its structure mainly by a round fast sensor,the controller(puter)and the solenoid valve is accurate meter wheel fast,the sensing and between the wheel tooth ring should leave leeway the 1mm order to avoid the water,the putty,the dust to the sensor influence,before the installment,should the sensor replenishment solenoid valve uses in wheel brake39。Three channel braking system,each front wheel has one,two two trailing wheels use in mon solenoid valve has three hydraulic pressure holes,separately applies the brake with the brake master cylinder and the wheel to divide the cylinder to be connected the brake with the brake master cylinder and the wheel to divide the cylinder to be connected,and can realize pressure lifting,pressure maintenance,the pressure drop accent to press the principle of work is as follows: 1)Pressurerise when the solenoid valve does not work,the brake master cylinder connection and applies the brake to divide the cylinder connection respectively to go the main spring intensity is big,makes charging valve openning,the brake pressure to increase. 2)pressure maintenance,when wheel39。s pressure grows to certain value,charging valve cutoff support maintains at the pound state,three panels seal,maintain the brake pressures mutually. 3)voltage dropping,when the solenoid valve works,the support overes two spring39。s sensor carries on the putation,the analysis,the enlargement and the distintion,outputs again from thc output stagc thc mand signal thc soloid valvc,carrics out thc brac pressure adjustment electronic control,by four major part is posed,input level A,conteoller B,output stage C,constant voltage and protective device controller by 4101tz frequency actuation solenoid valves,this is the polot is unable to kind of single parameter control mode ABS,because the structure is simple,the cost is low,thereforce the present use is broad. Mostly has provided this kind of single parameter control mode ABS in the American Chrysler custom is loaded with a round fast sensor on passenger vehicle39。s tooth rings on the axle tree,turns a fast sensor39。s speedup or the deceleration,issues 西安工程大學(xué)畢業(yè)設(shè)計英文譯文 6 pressurerise or the release of pressure instruction to the solenoid valve,controls applies the brake to divide the cylinder braking force. problems by used the ABS system (1)replaces the brake or the replacement hydraulic pressure braking system part,should arrange only in brake line39。s normal work. (2)is loaded with the ABS automobile,every year should replace a brake ,the brake fluid water absorbability is very strong,after the watery,not only will reduce the boiling point will have the corrosion, will also create the brake potency decline. 3)inspects the ABS antilock braking system to cramp out the power source frrst. of development Uses the logical threshold value control algorithm may avoid a series of numerous and diverse theoretical analysis and to some element of certainty quota measurement. Simplified controller39。s angular speed is advantageous realizes therefore the load cost is low. This algor hm already drew close maturely for current automobile ABS system universal usebut it by no means best control algorithm. Because under the different state of roads each kind of threshold value and guarantees presses the time is the empirical value which obtains after the repeated test does not have the very explicit theory basistherefore the ABS development39。s eηor to be smallest in the future. What because this algorithm uses is the online trundle optimizes unceasingly and unceasingly carries on the feedback in the optimal process through the actual system output and the forecast model output39。s robustness to obtain the enhancement. )1s smaller along with the volume the price is cheaper the reliable higher vehicle speed sensor39。s vehicle speed sensor (for example electrooptical type Doppler and so on) the present will most have the possibility to apply in the automobile ABS system. This time may take seriously based on the glide rate control algorithm. And the fuzzy control w