VIBRATION CONTROL SYSTEM

Vibration control refers to the technique or method used to reduce or eliminate unwanted vibrations in machines, structures and systems.

Vibration control systems are designed to reduce, eliminate or control excessive vibration using vibrational analysis and modeling techniques as tools to design, operate and control static and dynamic systems subjected to vibration.

There are three main types of vibration control systems and they are; passive, active and semi-active vibrational control system.

Passive vibrational control systems use materials and structures to absorb or dissipate vibrational energy without any external power source. This includes the use of tuned mass dampers, vibration isolators and viscoelastic materials.

Active vibrational control system use sensors, actuators and control algorithms to actively control vibrations. This includes the use of active suspension systems, active noise control systems and vibrational control system using piezoelectric actuators or materials.

Semi-active vibrational control system use a combination of passive and active control methods to reduce or eliminate vibration. This includes the use of semi-active tuned mass dampers and semi-active vibration isolators.

A vibration control system consist of both software and hardware components that work together to control vibration.

The hardware components of a vibration control system are; sensors, actuators, control unit, power amplifier and data acquisition systems.

The sensors are used to measure the vibration imposed by the system and provide feedback to the control system. The sensors used include accelerometers, velocity sensors, displacement sensors etc.

The actuators are used to apply forces or motion to counteract the vibrations. Actuators used include electric motors, hydraulic actuators, piezoelectric actuators etc.

The control unit is used to process the sensor data and generate control signals for the actuators. The control unit includes micro-controllers, digital signal processors (DSP), field programmable gate array (FPGA) etc.

Power amplifiers are used to amplify the control signals to drive the actuators.

Data acquisition system is used to collect and process data from the sensors.

The software component of a vibration control system are; control algorithm, signal processing software, system identification software and simulation modeling software.

Control algorithms are mathematical algorithm that determines the control signals based on the sensor data. Common control algorithms include proportional integral derivative (PID) control, model predictive control (MPC), adaptive control etc.

Signal processing software uses software to process the sensor data to extract relevant information such as frequency and amplitude.

System identification software uses software to identify the dynamic characteristics of the system such as its natural frequencies and mode shapes.

Simulation and modeling software uses software to simulate the behavior of the system and predict the effectiveness of different control strategies. The software used for simulation and modeling includes MATLAB/SIMULINK, Lab View, ANSYS etc.

The advantages of vibration control systems are as follows; vibration control systems can reduce damage to machines, equipment and structures. Vibration control system can improve performance and efficiency of machines and systems. Vibration control systems can improve safety by reducing risks of accidents and injuries. Vibration control systems can reduce noise levels and improve the overall quality of life.

The disadvantages of vibration control systems are as follows; vibration control system can be complex and require sophisticated design and implementation. Vibration control systems can be expensive to design, implement, operate and maintain. Vibration control systems may not be effective in all situations and may require additional measures to achieve desired results.

Vibration control systems find applications in the following industries; vibration control systems and techniques are employed in aerospace, automotive, production, manufacturing and structural industries to reduce vibration, improve performance and efficiency, improve safety and stability in machines, equipment and structures.

The future of vibrational control system is based on the advances and development in the following technologies; advances in new materials and technologies are being developed to improve vibration control systems. Active vibration control systems are becoming the vogue in various vibration control applications. Vibration control systems are being integrated with other technologies such as artificial intelligence and machine learning. Vibration control system is being designed with sustainability in mind, reducing energy consumption and environmental impact.

 

SOURCES:

• Vibration control of active structures: An introduction by A. Preumont.
• Vibration control engineering: passive and feedback systems by Douglas Thorby.
• Active control of noise and vibration by Colin H. Hansen and Scott D. Synder.
• Vibration damping control and design edited by Clarence W. de Silva.
• Active vibration control: Design and applications by Jiqiang Wang and Steve Daley.