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The core of active shock absorption technology: How the CDC system reshapes the driving experience

In the era of smart cars, the comfort and safety of vehicles depend not only on power and design, but also on the “intelligence” of the chassis system. As the core of active shock absorption technology, CDC (Continuous Damping Control System) gives vehicles the ability of “adaptive balance” through real-time perception, precise calculation and millisecond response.

The CDC controller integrates a number of cutting-edge technologies, and its functions cover the entire link from data acquisition to dynamic control, which can be called the “all-round housekeeper” of the vehicle.

The core functional module is configured with dual-mode wake-up: supports hard-line and CAN bus wake-up to ensure fast system startup. And 5V multi-channel power supply provides stable power supply for peripherals such as sensors, and supports overload protection and current recovery.

Support high-precision data acquisition, multiple inputs: 9 analog signal acquisition, 4 PSI5 signal acquisition, covering key parameters such as temperature and voltage; 6-axis inertial module, real-time monitoring of vehicle posture and motion state, accuracy of ±0.1%; precise control of solenoid valves, 4 independent current closed-loop drives, response time as low as milliseconds; safety protection: integrated open circuit/short circuit diagnosis and overload protection to ensure control reliability.

With high-speed communication and calibration, dual CAN channels, baud rate of 500k, to meet the needs of high-speed data interaction. Support INCA, CANape and other tools to achieve rapid parameter calibration and software upgrades, adapt to the deep development of autonomous driving.

The core advantage of the CDC system lies in the extreme efficiency of its “perception-decision-execution” link:
Perception layer: The IMU module collects vehicle acceleration and angular velocity at a frequency of thousands of times per second, and combines the shock absorber installation angle to solve the relative motion state of the wheel and the body in real time.
Decision layer: Through the adaptive algorithm, the sensor data is matched with the preset “optimal damping parameter table” to dynamically adjust the control strategy. For example, when making a sharp turn, the damping is increased to suppress the roll, and on a bumpy road, the damping is reduced to absorb the impact.

Execution layer: The solenoid valve drive response speed is at the level of seconds, and the current control error is only ±0.05A, ensuring that the damping force is adjusted accurately without delay.

This process takes only a few milliseconds, far exceeding the speed of human nerve reaction, so that the vehicle is always in the best shock absorption state.

The design of the CDC system not only pursues performance, but also focuses on engineering implementation. The total mass of the Zhengheng Power Controller is only 271g, supports M8 bolt installation, and is suitable for a variety of vehicle layouts; from hardware identification (version self-test), UDS diagnosis, and XCP calibration protocol, the system reliability is fully guaranteed. Reserve expansion space for autonomous driving and vehicle networking.

In the future, with the popularization of autonomous driving technology, the CDC system will become an indispensable “nerve center” for intelligent chassis, and driving wisdom begins with millimeters. Aggregating green energy power, passion and innovation, Zhengheng Power explores infinite possibilities for active shock absorption technology.