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Mechatronics word is made from the combination of words mechanics and electronics, so it is a field of science which mainly includes mechanical and electronic engineering. It also includes computer engineering, control engineering, systems engineering, and telecommunications engineering. It is basically application of various technical fields to find more reliable product design and manufacturing solutions.
It was first coined by Tetsuro Mori, a Japanese engineer. The best example of Mechatronics is an industrial robot. Mechatronics has large scope for engineers of all fields. Mechatronics adds intelligence to design of the system, by which efficiency of the system improves. In some applications such as auomotive brakes, these time limits must never be missed, making the validation and testing of real-time systems an important research area at SU.
APPLICATIONS OF MECHATRONICS
The performance of embedded systems differ from general purpose computer systems where the time required to make decisions based on current inputs latency is more important than number of operations per second throughput. Embedded hardware design focuses on such areas as multi-threaded processors and decreasing latency while keeping the operation of the processor deterministic.
Real-time operating systems schedule many tasks on the processor while making sure that none miss their deadlines. Researchers work to discover new algorithms which meet these goals, aided by hardware designers who produce processors according to their specifications. Modern manufacturing systems are becoming extremely complex. A single but complex computer system to control them is not very practical because the amount of computation required would be too great.
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Use of several network controlled smaller computers offers an efficient solution. To meet the real-time requirements, however, all of the computers and the network must have time bounds to complete calculations and the data transfers. This area of networked control systems is new and thriving; seen by most researchers as the future of embedded systems. Lacking the visibility to the system design, the engineer had no other choice than to address the shortcoming with a larger power supply, leading to a significant cost increase.
When the more experienced embedded motion engineer assessed the situation, he found that he could modify the firmware to lock out simultaneous acceleration of the two motors. This drastically reduced the peak power draw, allowing a smaller and cheaper supply to be used.
In the design of a high-volume laser scanning system, the client needed extremely precise control of the laser scan rate. The original design used a once-per-revolution optical sensor signal to control speed, and drove the motor with field-oriented control FOC , and advanced and very smooth BLDC drive technology. Here, the experienced embedded motion engineer proposed an alternative. Instead of using a single reflective stripe per revolution, the line count was increased to 25, yielding 50 position measurements per revolution. In the design of a high-volume drive train, a small dc motor was attached to a sheet metal mounting plate.
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This caused an audible hum, which was a significant issue for the customer. In this design, the embedded motion engineer augmented the standard PID control loop that he had used with a controller based on the internal model principle IMP. IMP is an advanced technique where a model of the system disturbance can completely cancel out the disturbance.
In this case, the disturbance was the sinusoidal motor commutation torque signal. By implementing an IMP controller, the torque ripple from the motor was completely cancelled, thereby eliminating the motor plate vibration. This removed the need for a tooling change, thus saving the schedule.
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Doug Harriman is the CTO of Simplexity Product Development , an engineering services firm specializing in the development of embedded motion products. Device certification, software analysis, reduced power consumption are all ubiquitous issues in the embedde December 5, OpenSystems Media. Balanced and optimized design The embedded motion engineer has ownership of the overall design margin for the embedded motion system.
Specialized knowledge The engineering curriculum is extremely dense. Consumer ink-jet printer power Like all good, conservative engineers, an electrical engineer in charge of the power-supply design for an ink-jet copier was forced into a large, but underutilized power supply. A tale of two drives In the design of a high-volume laser scanning system, the client needed extremely precise control of the laser scan rate. Buzzkill In the design of a high-volume drive train, a small dc motor was attached to a sheet metal mounting plate.