Tech Primer
Suspension system is one of the most important parts in a vehicle. It is responsible for moderating the impact load on the vehicle frame (or body) caused by the uneven surface of road, so as to mitigate the resulted vibration on the chassis, ensuring a stable and comfortable driving.
According to whether the damping and rigidity performance of suspension change with the different driving conditions, it can be divided into passive suspension, semi-active suspension and active suspension. As the traditional passive suspension system can not provide sufficient stability and comfort features, and the active suspension system has a higher cost, the semi-active suspension presents a more favorable cost/performance ratio. Thus it is predictable that the semi-active suspension system will be getting more and more prosperous in automotive applications.
Semi-active suspension system includes elastic components and shock absorbers that their rigidity and damping force both can be adjusted, or one of them is adjustable. The core device is an ECU, which receives abundant information about vehicle running state from the sensors, including speed, brake status, vertical and lateral accelerations, steering angle position, and then calculates based on these information by a specific algorithm to control the ER (Electro-Rheological) shock absorber or other types of shock absorbers, so that the vehicle body vibration can be mitigated.
Other Resources
- Active suspension
- Suspension (vehicle)
- Semi-Active Suspension System
- Suspension Technologies Overview
- Focus-On Microcontrollers
- Ring Magnet Speed Sensing for Electronic Power Steering
- FlexRay speeds automotive safety applications
- Evaluation kit can kick start FlexRay applications
- Multiobjective Optimisation of Active and Semi-Active Suspension Systems with Application of Evolutionary Algorithm
- Modelling and simulation of a semi-active suspension system
- A LPV based Semi-Active Suspension Control Strategy
- Semi-active suspension system with control circuit having a direct control loop including an inverse model of the damper
- Using car semi-active suspension systems to decrease undeasirable effects of road excitations on human health
- Application of different control approaches to the design of semi-active suspension systems
- A Lateral Semi-Active Suspension of Tilting Train
- Semi-Active Suspension for ride improvement using stability augmentation system control algorithm
- Signal frequency based self-tuning fuzzy controller for semi-active suspension system
- The improvement of full vehicle semi-active suspension through kinematical model
- Model free control design for a semi-active suspension of a passenger car