Active suspension system fuzzy control method for improving comfort based on frequency domain characteristics
A technology of active suspension and frequency domain characteristics, applied in the field of fuzzy control of active suspension system, can solve problems such as lack of complete and standardized design process, insufficient optimization of vehicle comfort, and insufficient consideration of human sensitive frequency domain characteristics.
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[0117] Example one
[0118] like figure 1 As shown, a fuzzy control method of active suspension system to enhance the car ride comfort, including:
[0119] 1) Establish a dynamic equation for automotive active suspension system
[0120] like figure 2 As shown, the model of the car active suspension system is established as follows:
[0121]
[0122] Among them, M s Quality of the spring; M u Under the quality; U (t) is the control input of the suspension system; s K s , C t And K t The suspension damping coefficient, spring stiffness coefficient, tire damping coefficient, and tire rigidity coefficient. z s Indicates the body distance, Z u Indicates the quality speed of the spring.
[0123] Considering that the weight and the weight of the body weight may change, the spring mass M is provided. s , Spring mass M u The change ranges are: M s ∈ [m smin , M smax ], M u ∈ [m umin , M umax ].
[0124] In order to establish a system status space equation, define x 1 (t) = z s (t) -z u (...
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