Implementation and Testing of a Semi-Active Damping System

The objective of this dissertation is to implement and check a semi-active damping system with different concept from an early on dissertation. The project includes implementation of mechanical, gas and electronic hardware, along with game controller software. The theory is to appraise the movements of the vehicle framework and dependant on these measurements set the damping twisting using hydraulics. To be capable of develop, test and measure the program, realistic input files must be available. To obtain this kind of data, driving trials have been conducted on a many types of tracks.The beginning of the technique is the devices which measure chassis movements. Both accelerometers and a gyro has been utilized. To take off drift and high frequency vibrations, the signals are strained.

Contents: Implementation and Testing of a Semi-Active Damping System

1 Introduction
1.1 Background
1.2 Purpose
1.3 Presentation of Problems
1.4 Method
1.5 Outline
1.6 Delimitation
1.7 Goal
1.8 Target Group
2 Semi-Active Damping System
2.1 Tools and Interface
2.1.1 Development and Testing Tools
2.1.2 Programming
2.1.3 Code Transfer
2.1.4 Calibration and Interface
2.1.5 TargetLink, DataDictionary and External Declaration
2.1.6 Driving Trials
2.1.7 Software Simulation
2.2 Systems Overview
2.3 Mechanical and Hydraulic Hardware
2.3.1 Damper modiﬁcations
2.3.2 Pressure Control Hydraulics
2.3.3 Valve Plate and Hosing
2.4 Electronic Hardware
2.4.1 Accelerometers and Gyro
2.4.2 Control Computer
2.4.3 DSV
2.4.4 Wiring and Connectors
2.5 Damper Control Software
2.5.1 Input Conversion
2.5.2 Signal Filtering
2.5.3 Integration
2.5.4 Floating Average Drift Compensation
ix2.5.5 Anti Saturation
2.5.6 Velocity Recalculation
2.5.7 Aurora Controller
2.5.8 Rate Limiter, Backlash and Requested Pressure
2.5.9 Output Conversion
2.5.10 Interface Code
2.6 Test Equipment
2.6.1 Recreating the Recorded Signals
3 Test Results and Conclusion
3.1 Simulation Results
3.1.1 Drift
3.1.2 Filter Effects on Acceleration
3.1.3 Which is Faster, Accelerometers or Gyro?
3.1.4 Damper Velocities at Exaggerated Bumps Track
3.2 Test Results
3.2.1 Hydraulics Alone
3.2.2 Entire System Including Control Computer
3.2.3 Recorded Tracks
3.3 Conclusions
3.3.1 Sensors
3.3.2 Computer and Control Software
3.3.3 Hydraulics
3.3.4 Other Things
Bibliography
A Recorded Signal
B Figures
C Offset Electronics
D Distorted Signal