Industrial Vehicle Pitching Vibration Control via Actuator Torque
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Solution Overview
Problem
Industrial vehicles experience undesirable pitching vibration when carrying a load, leading to cargo vibration and reduced driver comfort, which existing technologies have not effectively addressed.
Innovation Solution
The implementation of a feedback control system using a vibration detector to apply a pitching control torque through actuators such as the engine, clutch, or brake, calculating and generating a counter torque to suppress pitching vibration based on vehicle speed and lift pressure sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional industrial vehicles run under a load, then cargo transportation is achieved, but pitching vibration occurs causing cargo instability and reduced driver comfort
Solution Approach 1:
The patent implements a feedback control system using a vibration detector to monitor pitching motion and a control unit that adjusts actuator output based on detected vibration levels. The control unit calculates a pitching control torque based on detection values and generates control signals to apply counter-torque, creating a closed-loop feedback mechanism that actively suppresses pitching vibration while maintaining cargo transportation functionality
Solution Approach 2:
The patent changes the operational parameters of existing actuators (engine, clutch, or brake) by dynamically adjusting their output torque based on detected pitching vibration. The control unit modifies the driving force or braking force parameters in real-time to generate counter-torque that opposes pitching motion, thereby suppressing vibration without requiring additional dedicated actuators
2Object-affected harmful factors
If additional suspension or accumulator systems are installed to suppress pitching vibration, then vibration suppression is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes existing actuators (engine, clutch, or brake) serve dual functions: their primary function for vehicle propulsion or braking, and a secondary function for pitching vibration suppression. The control unit enables these existing components to generate pitching control torque in addition to their normal operations, eliminating the need for dedicated vibration suppression hardware and reducing system complexity
Solution Approach 2:
The patent enables the vehicle's existing actuator system to serve itself for vibration suppression by using the same components already present for propulsion and braking. The control unit allows these self-contained components to generate counter-torque for pitch control, making the system self-sufficient without requiring external vibration suppression devices
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
Effectively suppresses pitching vibration by applying a counter torque as a driving or braking force, improving cargo stability and driver comfort without the need for additional suspension or accumulator systems.
Implementation Method 1
a vibration detector that detects pitching vibration of the vehicle body
Implementation Method 2
apply a pitching control torque to the vehicle body as a driving force or a braking force of the actuator
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An industrial vehicle 1 includes a brake 5 that applies a driving force or a braking force to a vehicle body 22, a lift pressure sensor 632 that detects pitching vibration of a vehicle body, and a pitching control unit 62 that calculates a pitching control torque for suppressing pitching vibration and generates a pitching control signal for causing the brake 5 to output the pitching control torque. When the industrial vehicle 1 runs under a load, the pitching control unit 62 calculates the pitching control torque based on an output value from the lift pressure sensor 632 to output the pitching control signal. The brake 5 is then driven based on the pitching control signal.