中英文文献翻译-汽车磁流变减振器

附录A外文文献原文

Magnetorheological damper car.

1.Research status of magnetorheological damper

Magnetorheological fluid refers to the additional magnetic field,under the action of rheological materials performance changes took place in the liq- uid.Will magnetorheological fluid into the magnetic fluid damper,though the control of magnetic field intensitymcan realize continuous magnetorhological damper,adjustable steplessly.Magnetorhelolgical damper usually adopts piston cylinder structure ,the pathway of MPF damper is on the piston or separate bypass,in the path of MRF,according to the structure of magnetic field can be divided into a bar and a single piston cylinder structure of dual pole.

Magnetorheological damper can produce bigger,and according to the damping force of the external environment different easy adjustment magnetic field intensity,the change of shock absorber system to reduce vibration damping, achieve the goal.In the development of MFR devices and Lord,the Unites States and Delphi corporation in automobile damping application research holds June In 1995,the Lord of the fifth international electorheological fluids,and r- elated technologies of MRF,demonstrates a large trucks for semi-active sus- pension seat vibration isolation system p.Lord company recently issued a s- uitable automobile suspension of magnetorhological damper and Rheonetie series of current controller RD.3002.American Delphi company has developed magnet- orheological fluid using semi-active suspension system MagneRide team move suspension system applied in Seville Cadillac STS high-grade car,the suspe- nsion system can be changed according to the driving conditions.University ofVirginia utilization of magnetorhological damper Lord company in Volvo truck Fururecar heavy suspension frame for the cars on experiment,made the obvious eggect of vibration reduction.University ofMaryland and development of auto- motive air compensation structure air compensation structure of magnetorhe- ological damper.The damper adopts flow mode,simple stucture,the damping force change range is 250-1500N.Bok.CHOi Seung Korean coach suspension system is

developed magnetorheological damper,dual cylinder structure,damping cylinder located at work channels in damper was design of PID boratory tests show that:the use of magnetorheological damper can greatly improve the traffic safety and comfort.Ford motor company BASF,Germany,etc have invested heavily rd magnetorheological fluid and related componets.

In the application of magnetoreohological damper is doing a lot of res- earch.Chongqing university of magnetorheological damper Liao Changrong as the design and control methods are studied,Chenjian of Shanghai jiaotong univer- sity for vehicle damping,the design of nanjing university of aeronautics Guo DALEI of magenorthological damper such vehicles in the semi-active control are studied,jingsu university on the adjustable jd.liu semi-active suspension d- amper control methods are studied,etc,damping design and control research has become hot.

2.Semi-active suspension control strategy and research status.

Most current semi-active suspension system is to shock absorber real-time control of damping and adjust,its essence is measured by real-time sensor of vehicles running environment and body state,the data to microprocesser control algorithm is calculated according to the optimal damper,and then control re- gulation,shock absorhers damping force to achieve the ideal damping force, imporve the performance of the suspension,one of the key technologies is to control strategy.In the semi-active suspension of 30 years,and veicle engi- neering half-anf-half active suspension control strategy for a lot of resea- rch,the representative of control method can be summarized as follows:

(1)The optimal control strategy.

The optimal control is simply stated in the given conditions and evaluation function for the performance of the system ,the index optimal control laws.Its theoretical basis is linear optimal control theory,though the establishment of the state equation is proposed control system,target and weighting coeff- icients in the application of target set by the control theory of optimal control law to achieve optimal control.

(2)Predictive control.

Predictive control refers to the road ahead through the sensor will su-