OVERVIEW Impact of Modelling and simulation in Mechatronics system Mechatronic system components Phases of Mechatonics system Types of Design Integrated product Design Traditional Vs Mechatronics Approach

Mechatronics Key Elements

MODELLING & SIMULATION Modelling is the process of representing the behaviour of a real system by a collection of mathematical equations and logic. Physical-mathematical description of a technical component, subassembly or a complex system. Simulation is the process of solving the same model on computer. Calculation of the behavior of a system model in dependence on time, and the state of a system and environment. The simulation provides projections about the behavior of the real system with the aid of a model, which can be executed in a computer. Simulation process has the three basic steps: Initialization Iteration Termination

AUTOMATIC CONTROL System control is achieved by sensors, actuators and embedded microcontrollers. A system in which, the output has an effect upon the input quantity, in such a manner to maintain the desired output value is automatic control system.

Example - for a box-shaped luggage to maximise volume: OPTIMIZATION In Mechatronics, optimization is primarily used to establish the optimal system configuration. It solves the problem of distributing limiting resources throughout a system such that the pre-specified aspects of its behavior is satisfied. Here, resources are referred to as design variables, aspects of system behaviour as objectives, and system governing relationships (equations and logic) as constraints. Example - for a box-shaped luggage to maximise volume: Design variables : L (length), W (width), H (height) Objective : Maximise V = V(L,W,H) Constraints : System relationship V = LHW

Key elements of Mechatronic systems can be classified under following categories 1. Information systems 2. Mechanical systems 3. Electrical systems 4. Computer system 5. Sensors and actuators 6. Real time interfacing

Integration of Components (Hardware Integration) Embedded with sensors, actuators and microcomputers Designing the mechatronics system which integrating the sensors, actuators and computers into the mechanical process and can be arranged at several places. Integration of Information Processing (Software Integration) Embedded with advanced control functions Besides a Feed forward and feed back control, an additional influence may take place through the process knowledge and corresponding online information processing. This means processing of available signals at higher levels using fault diagnosis and optimization

Classification of Mechatronics system

Phases of Mechatronics design process Modeling : Systems are represented by a suitable model for evaluating the behavior characteristics using simulation methods. Prototyping : Sensors and actuators are interfaced with i/p and o/p signals with the trial models, resulting in partial mathematical and real models. Here real part provides real-time analysis and mathematical part provides simulated time-based response. We can synchronized to understand and validate the design Deployment : Associated with the final product, embedded software deployment and lifecycle.

Steps involved in modeling and simulation Need : Adaptive market research and knowledge must be accumulator to achieve a clear picture of what the customer wants. Feasibility : Examine the commercial as well as technical aspects of the proposed product such as Warranty and future maintenance cost which will influence the profitability. Specifications : It encompasses the weight, payload and interfaces,etc. Conceptual design : Generate six possible solution. Embodiment & : Once optimal solution has been identified, we move to Optimization detailed design phase and the production of manufacturing drawings

Integrated Design Approach

MCT consists of several interconnected subsystem and components TYPES OF DESIGN [ Design for strength or stiffness Design for reliability Design for maintainability - Features such as repair on replacement Design for manufacture - Concerned for Automatic assembly. Here the machine capability must be taken into account for the rationalisation of component, fixture & fitting between between similar product & process. Traditional Approach Mechatronics Approach Original and operating characteristics will changes due to the actual loading and dynamic interactions. Perfect impedance matching of the two designed system is quite difficult System is reliable due the integrated system design.

Traditional Approach Mechatronic Approach Bulky system Complex mechanism Rigid heavy structures Manual control Non adjustable movement cycle Accuracy is less Compact Simplified mechanism Lighter structures Automatic and programmable control Programmable movements. Good accuracy due to feedback

OBJECTIVE TYPE QUESTIONS 1. Stage in design process a) Production of a detailed design b) More flexible c) Dead time d) None of the above 2. The first stage in developing the design a) Solving the problem b) true nature of the problem c) Temperature control d ) none of the above. 3. Need in design for Intelligent control Defined control Both a and b None of the above.