A Hybrid Control Method of Vibration and Shock for Semi-active Controllable Seat Suspension

Abstract

The invention discloses a vibration-impaction hybrid control method for a semi-active controllable seat suspension frame. The method comprises the following steps: (1) acquiring the system state; (2)carrying out comparison on an excitation speed and a response speed; (3) calculating the equivalent mass when a seat and a human body are integrated into a whole; (4) carrying out comparison on a seatsuspension frame stroke S* and a seat suspension frame residual stroke S when Z0 is less than Zs; (5) calculating a control mode of the seat suspension frame; (7) calculating an expected dampingforce; and (7) judging whether the impaction control is finished. According to the vibration-impaction hybrid control method, the control mode of the seat suspension frame can be selected under different excitation effects, so that the peak acceleration value of the excitation of the bottom of the seat to the human body can be furthest decreased.

Description

technical field [0001] The present invention relates to the field of semi-active control of seat suspension and even automobile suspension, more specifically, a control method of seat suspension based on controllable energy absorber with combined control of dynamic vibration reduction and impact buffering. Background technique [0002] The explosive impact produced by landmines and improvised explosive devices seriously threatens the safety of drivers and passengers of special vehicles. was broken down. With the improvement of the protection level of special vehicles, although the number of casualties of drivers and passengers of special vehicles has dropped significantly, the number of spinal injuries caused by the "impact effect" has increased significantly. The definition of "impact effect" is that a special vehicle is blown into the air and falls back to the ground heavily. This process will generate a huge impact acceleration and act on the human body (spine) of the dr...

AI Technical Summary

Problems solved by technology

In fact, the structural design and control method of the seat suspension system aimed at vibration damping is not suitable for the shock buffer control target, because in the application of the vibration control system, the structural design of the seat suspension system does not consider the impact The possibility of suspension limit, the control method does not take the seat suspension stroke into account, so the seat suspension stroke cannot be used to absorb more impact energy, nor can it minimize the excitation of the seat bottom to the human body peak acceleration

In addition, for the application environment of the impact buffer control system, compared with the semi-active seat suspension system, the active seat suspension system cannot be used as a passive actuator when the control system fails completely, and cannot provide damping energy consumption performance

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