Active Suspension Control for In-Vehicle Stable Platform
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Solution Overview
Problem
Existing vehicle systems lack the ability to maintain a horizontal chassis or platform during uneven road conditions, leading to reduced operation efficiency and increased risk of accidents.
Innovation Solution
An in-vehicle stable platform system employing active suspension, utilizing an inertial measurement device to measure pitch and roll angles in real time, and controlling suspension servo actuation cylinders to maintain the platform horizontal through a control method based on a three-point plane determination principle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle travels on uneven road, then the vehicle can move forward, but the chassis and crane boom will pitch or roll causing platform instability
Solution Approach 1:
The suspension system uses servo actuators to dynamically adjust the position of wheel groups in real-time based on platform orientation feedback, transforming the static suspension into an active, dynamically controllable system that can counteract road-induced disturbances while maintaining platform horizontality during vehicle travel
Solution Approach 2:
The system employs inertial measurement devices to continuously monitor platform pitch and roll angles, feeding this orientation data back to the electronic control device which then adjusts the servo actuators accordingly, creating a closed-loop control system that maintains platform stability during vehicle motion on uneven surfaces
2Manufacturing precision
If suspension servo actuation cylinders are controlled to maintain platform horizontal, then operation quality improves, but system complexity increases
Solution Approach 1:
The suspension system is divided into multiple independent wheel groups (typically three), each equipped with its own servo actuator, allowing individual control of each support point. This segmentation enables precise control of platform orientation through coordinated adjustment of discrete suspension units, achieving high positioning precision while keeping each control module relatively simple
Solution Approach 2:
The electronic control device performs multiple functions: it processes data from inertial measurement devices, calculates required actuator adjustments based on platform orientation, and controls multiple servo actuators simultaneously. This multi-functional approach consolidates control logic into a single device, reducing overall system complexity while maintaining precise platform levelness control
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively maintains the vehicle platform horizontal, improving operation efficiency and safety by reducing the tilt of the crane arm and the swing of hoisted objects, and enhancing stability in special-purpose vehicles.
Implementation Method 1
an inertial measurement device fixed on the in-vehicle stable platform to measure a pitch angle and a roll angle of the platform during the vehicle travels
Implementation Method 2
controlling the extension/retraction of the suspension servo actuation cylinders to maintain the in-vehicle stable platform horizontal during traveling
Data Source
Figure 1
Figure 2
Figure 3~5
AI summary
An in-vehicle stable platform system employing active suspension and a control method thereof is provided. The system includes a vehicle body, an in-vehicle stable platform, an inertial measurement device, an electronic control device, a servo controller set, multiple wheels, and suspension servo actuation cylinders and displacement sensors respectively corresponding to the wheels. The wheels are divided into three groups, which form three support points. The heights of the three support points are controlled to control orientation of the vehicle body. An amount of extension/retraction of the suspension servo actuation cylinders required to cause the in-vehicle stable platform to return to a horizontal level is calculated according to a measured pitch angle and a roll angle of the in-vehicle stable platform, and when a vehicle travels on an uneven road, the extension/retraction of each suspension servo actuation cylinder is controlled to cause the in-vehicle stable platform to be horizontal.