A Multi-mode Coordinated Switching Control Method for Vehicle Hybrid Suspension Actuators

Abstract

The invention discloses a multi-mode coordinated switching control method for a vehicle hybrid suspension actuator. The vehicle hybrid suspension actuator includes an actuator body and a control unit. The variable shock absorber, the upper linear motor unit arranged on the upper part of the double-exit rod magneto-rheological shock absorber, and the lower linear motor unit arranged at the lower part of the double-exit rod magneto-rheological shock absorber; its multi-mode coordinated switching control The method comprises steps: 1. data collection and synchronous transmission; 2. calculating the ideal damping force under LQG control of the vehicle suspension; 3. calculating the root mean square value of the weighted acceleration of the vehicle; 4. energy feeding mode, semi-active control mode and active control Coordinated switching control of modes. The invention has novel and reasonable design, convenient realization and low cost, high working stability and reliability, high energy feeding efficiency and high real-time performance, can make the hybrid suspension in the best damping state, has strong practicability, and is easy to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of vehicle suspension actuators, and in particular relates to a multi-mode coordinated switching control method for vehicle hybrid suspension actuators. Background technique [0002] When the vehicle is running, the vehicle vibrates due to the excitation of the unevenness of the road surface. At present, what is widely used in automobiles is to realize the functions of damping vibration and carrying the body through passive suspension (composed of shock absorbers, elastic elements, etc.). However, the performance parameters (stiffness and damping) of the passive suspension cannot be adjusted in real time according to the actual working conditions of the vehicle during driving. The frame converts the energy of the vibration of the car into heat energy and dissipates it in the air through the shock absorber and the elastic element, and it is not utilized. Due to the shortcomings of the passive suspension tha...

AI Technical Summary

Problems solved by technology

The active suspension can adjust the vibration damping performance of the suspension in real time according to the excitation of the unevenness of the road surface and the driving conditions of the vehicle, and the active suspension can adapt to all road excitations and vehicle driving conditions. However, the active suspension has high energy consumption. The shortcomings of its performance make its development prospects greatly restricted.

The advantage of the semi-active suspension is that it can provide a certain range of damping force for the suspension and can also recover energy. However, since the semi-active suspension can only change one parameter in the stiffness or damping of the suspension, the semi-active suspension There are disadvantages in the real-time adjustment of the frame, which cannot adapt to all road surfaces and vehicle driving conditions, which limits the further improvement of vehicle handling and ride comfort to a certain extent

[0003] Active suspension requires an additional energy source to provide the actuator to generate active force for vibration reduction, so active suspension consumes a lot of energy, which will seriously limit the promotion of active suspension in automobiles

Therefore, the energy feed of the active suspension actuator must be considered in the design of the active suspension, otherwise the popularization and application of the active suspension will be severely limited due to excessive energy consumption.

In addition to the high energy consumption of active suspension, there is another factor limiting its development and application, which is the failure of active suspension actuators

If the active suspension only uses actuators and springs, considering the failure of the actuators, the ride comfort and handling of the car will have a great impact

[0004] Active suspension single actuators include electromagnetic actuators, such as: linear motor type; electro-hydraulic actuators, such as: electrohydrostatic actuators; pneumatic types, such as: air spring actuators; The electro-hydraulic and pneumatic actuators are too large in size, which is not conducive to the installation of the vehicle suspension in practical applications. The electromagnetic actuator is small in size and high in efficiency, but if a single actuator fails, it will not be guaranteed at all. car ride comfort

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