Boom Lift with Hydraulic Actuation (Test Harness)

This example models the hydraulic system that raises and lowers a boom. A double-acting cylinder raises and lowers the boom, and counterbalance valves ensure a controlled descent.

This model is a test harness from the main model (see documentation)

Contents

Model

Open Model

Component Under Test

The component we are testing is a hydraulic system that raises and lowers a boom. The hydraulic network contains a four-way valve to control actuation direction and two counterbalance valves. The counterbalance valves prevent runaway loads by creating additional pressure in the discharge line of a hydraulic actuator. One double-acting cylinder actuates the unit.

Simulation Results: Lift Sequence

The plots below shows the result of a test sequence designed to only lift the boom. The test sequence includes signals for all valves so that the test sequence can also be run on the full model.

Below is the corresponding prescribed motion for the test. This allows testing on a full model that has motion for any combination of the actuators.

Motion of the lift, extend, and jib cylinders along with applied actuator force.

Hydraulic pressures in the actuators along with actuator position.