What Is Mechatronics?

I treat mechatronics as concurrent system design rather than as a label attached after mechanical, electronic, and software parts have been assembled. In a real product, inertia, sensor bandwidth, sampling period, controller latency, actuator limits, power electronics, and thermal behaviour constrain one another, so subsystem choices have to be made against shared requirements.

• Mechatronics Today

Electronics, computers and control systems are advancing rapidly.

Computer-controlled systems are becoming widespread in design and production.

Mechanical, electrical, electronic, hydraulic, pneumatic and computer technologies together form the discipline of mechatronics.

• Multidisciplinary Engineering: Mechatronics and Electromechanics

Mechatronics and electromechanics can both be described as multidisciplinary fields.

In electromechanics, the mechanical system is generally designed first, followed by the electrical, electronic and control systems. In mechatronics, these systems are designed concurrently.

• Examples of Mechatronic Systems

Today, systems without computer control or electrical and electronic components are increasingly rare.

Aircraft flight-control systems, washing machines, dishwashers, automotive fuel injection, ABS, airbags, remote-controlled door locks, photocopiers and numerically controlled machine tools are examples of mechatronic systems.

• Mechanical Systems

Systems that transmit, transform or store power.

They transmit motion from energy-producing systems such as motors to the required part.

They can change the direction, form and characteristics of motion.

A rack-and-pinion mechanism, for example, can convert linear motion to rotary motion or rotary motion to linear motion.

Mechanical-System Components

• Axles
• Fasteners and joining elements
• Gears
• Couplings and clutches
• Belts and pulleys
• Shafts
• Bearings
• Springs
• Chain mechanisms

Functions of Mechanical-System Components

• Springs store energy, while couplings and clutches transmit motion between motors and mechanical systems.
• Such components combine to form a mechanical system.
• Electrical and Electronic Systems

Mechatronic systems require a power source.

The energy supplied by the power system equals the useful work plus energy losses.

Electrical and electronic systems are responsible for control functions such as starting and stopping the system.

Electrical systems involve three basic quantities: charge, current and voltage.

Electronic systems transmit information through low-energy signals.

Information storage, processing and transmission are major functions of electronic systems.

Classes of Electrical and Electronic Systems

• Power systems
• Communication systems

Functions of Electrical and Electronic Components

• Electric motors convert electrical energy into mechanical energy.
• Generators convert mechanical energy into electrical energy.

Electrical and Electronic Components

• Electric motors
• Sensors
• Actuators
• Signal-processing circuits
• Signal-amplification circuits
• Relays
• Switches
• Fuses
• Information Systems

Also known as intelligent systems.

They evaluate information and can make intelligent decisions.

A mobile robot’s response to an obstacle, for example, is enabled by information systems.

Fields of Information Systems

• Artificial intelligence
• Artificial neural networks
• Fuzzy logic
• Computer Systems

Responsible for high-speed decisions and precise calculations.

Computer systems give machines capabilities analogous to human reasoning and decision-making.

Computer-System Components

• Hardware
• Software

Real-Time Systems

• Systems that detect changes at the input immediately and produce an appropriate output.
• Real-time systems use analog-to-digital and digital-to-analog converters.
• Incoming analog data is converted to digital form, processed and converted back to analog form for the output.

The original structured notes are retained below because they capture the mechanical, electrical/electronic, information, and computer-system components in detail. Their common engineering lesson is that a stronger motor, faster controller, or higher-resolution sensor is not automatically a better system. Performance comes from balancing the interfaces and resource budgets among those domains.

Connection to My Applied Work

I learned mechatronics not only as coursework but through systems where software produced physical behavior. My 2014 RFID access-control project connected a reader, Arduino and servo in a complete input-to-actuator path. During my 2015 Baykar internship, embedded software had to be understood together with electronics and measured signals. From 2016 to 2019 at Akınsoft and Akın Robotics, control, autonomy, telemetry, speech/vision processing and physical robot behavior belonged to the same product.

Those experiences made three boundaries especially important:

1. software state should not drift away from physical state,
2. perception and communication latency must be evaluated as part of control behavior,
3. failure handling must be defined in terms of safe physical behavior, not only application exceptions.

Related early work includes my Afyon Kocatepe University IT internship, remote-controlled access system and microprocessors/microcontrollers work.

Applied Connections

Applied examples that combine sensing, actuation, control and software include my Mini UAV software, RFID Access-Control System and the platform-oriented Microprocessors, Microcontrollers, FPGA and PLC page.

References

• **[1]** Rolf Isermann. (2005). Mechatronic Systems: Fundamentals. Springer. doi:10.1007/1-84628-259-4
• **[2]** W. Bolton. (2011). Mechatronics: Electronic Control Systems in Mechanical and Electrical Engineering, Fifth Edition. Pearson.