汽車電動助力轉(zhuǎn)向系統(tǒng)的設(shè)計(jì)說明書(參考版)
2025-08-07 02:45本頁面
【正文】 s ZF All have been developed EPS. MercedesBenz and Siemens Automotive two joint venture panies 65,000,000 pounds for the development of the EPS, the goal is to load in 2002, with an annual output of 3,000,000 units, EPS manufacturer in the world. So far, EPS system in a small car, the van has been on board a wide range of applications, and each year 300 million pace.1 Electric power steering system and the structure of the classificationElectric power steering system is mechanical in the steering system on the basis of the bined sensor (including speed sensors, torque sensors and small gear position sensor), the electronic control unit (ECU), electric power, electromagnetic clutch and slow body constituted (Figure 1).Electric power steering system may slow down the body is divided into different wormassistance agencies and differential gearhelp organizations in two forms. Differential gear with a body to smooth the way a sense of stability, sensitivity adjustable steering, front axle load is more suitable for small and highspeed manipulation of the high performance requirements of the car, the worm and institutions have to adjust the size of assistance for large front axle load , To the heavy main objective is to reduce the ability to manipulate highspeed performance and do not ask for much of the cargo vehicle. Another electric power steering system and the electric motor can also slow down the location of the body is divided into different (Figure 2): Poweraxis EPS (electric and deceleration device mounted on the steering shaft) and pinion powersteering (and slow down the electrical equipment installed On the input pinion) and the othersidepinion power (electric and deceleration device mounted on a small gear on the other side), rackpower (electric slow down and sets of equipment in the rack outside).2 EPS of foreign researchAt present, foreign study focused on the details of the characteristics of power, manipulated to further optimize the performance, consider the impact of domestic factors, and designed to operate on the simulator of the EPS control strategy evaluation. In the control of foreign policy studies focused on the choice of PIDbased pensation and e back to the control strategy, used alone for the fuzzy control, Hcontrol there, not for the time being neural network.Study abroad is usually based on the PID to control the pensation is based on being back to further optimize the performance, dominated control, steering, load in the process of the current disturbances, as well as the special road conditions, such as control of the vehicle. For example, Mitsubishi made a new EPS control strategy will be attached to the low road to provide better e back to the steering wheel and a sense of the way. This approach is only when the turning axis response is scheduled to meet the moment when the moment is to raise, use 2 kinds of control strategies: 1 kind of strategy is based on the feedback steering angle, and No. 2 is based on the estimated torque feedback correction. Mitsubishi and the other a new electric current control strategy is based on estimates and the interference voltage pensation , are still in mon use of the microprocessor, the current fluctuations in electrical and can be significantly reduced, thereby A reduction of unnecessary torque to the fluctuations and noise. The new controller is based on estimates of voltage fluctuations and pensation, including 2 module. One module is estimated that due to the battery voltage, and other changes caused by voltage fluctuations and the other modules to provide pensation for the electrical voltage in order to eliminate voltage fluctuations.As a whole in recent years in terms of domestic EPS for the research and development soon, especially in the control strategy, will have different methods to control the introduction of ECU, and through experiments and analysis continue to improve and improve, but the details of Optimization of the distance there is still a considerable gap between foreign and domestic In addition to Geely Automobile, has not yet own intellectual property rights of the EPS, the EPS from the bulk of production there is still a long way to go.3 Electric power steering system on other issuesAutomotive electronic steering system in practical applications, in addition to the security and reliability problems, there are a number of other issues, such as simulation of a sense of the way the problem of vibration motor, power supply problems, the sensor accuracy and cost, and so on. The simulation of a sense of the way the motor vibration problems in EPS of R amp。s steering direction, and its working principle is: EPS system from the steering wheel to the ECU and torque sensor speed sensor signal processing, the control of motor torque generated appropriate assistance to help
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