It is a fact that the safety of transportation by motor vehicles has increased in the past decades.
The number of fatalities related to car crashes even decreased during a period of time were the
average travelled distance has doubled. However, the number of fatalities can still be reduced further.
Besides that, it is expected that number of vehicles on the road will rise due to growing economies in
the developing countries. Therefore, it is important that more sophisticated car safety systems are
The most well-known safety system which is present in all modern cars, is the three point seat belt.
This system ensures that an occupant is restraint in his seat during a collision, which reduces the
changes on injury. However, this system can be further improved as stated by E.P. van der Laan in
his PhD study. This study resulted in a continuous restraint control (CRC) system consisting of a
semi-active hydraulic actuator installed on experimental setup and theoretical control strategy.
The aim of this bachelor's thesis is to analyze the behavior of the installed current amplier and improve
its tracking performance of the reference signal provided by the control algorithm. Futhermore,
the crash sleds motion prediction and the setpoint computation of the torso deceleration have to be
developed for the experimental setup.
In this report the following subjects are discussed. The rst chapter describes the experimental setup
and its components. The analysis of the current tracking behavior and the improvement thereof
are discussed in Chapter 3 and 4, respectively. In Chapter 5 the theoretical performance of the
actuator is computed, which is used to determine which crash test can be performed. These crash
tests are described in Chapter 6. During these experiments problems with the amplier occurred
which are discussed in Chapter 7. This is followed by Chapter 8 which covers the application of the
prediction algorithm developed by Van der Laan to the experimental setup. Finally, the conclusion
and recommendations can be found in Chapter 9 and 10, respectively.
Bachelor. - CST 2013.138