Table of Contents
•Processors and software defined functionality as becoming an integral building block of todays systems. Testing complex control units requires a dynamic testing platform.
•In industries like automotive, aerospace and defense (A&D) more intelligent decisions being taken by embedded control units. Thus manufacturers prefer hardware-in-loop (HIL) testing systems for effective testing and for better quality products.
•HIL testing has been in practice for about two decades. In 2014, the HIL testing market earned revenue of $ x billion with a consistent growth rate for the past x years.
•With an increasing demand in the automotive industry the need of HIL system also increases proportionally. This market segment holds the major portion of the market share.
•The A&D industry also requires extensive HIL system for crucial testing, but still the sales volume is less in comparison with the automotive industry.
•HIL testing has also widens its application in power systems, but the recent trend is the penetration of HIL in power electronics industry.
•Previously, the existing HIL simulators for power electronics are limited by a sampling time between x to x microseconds, which is not sufficient for real-time execution.
•With extensive research new HIL systems have been developed operating at x microsecond step time with ultra-low latency. This evolution opens a new market in the HIL industry.
HIL simulation is a process that is used to test the control unit by simulating the equipment in an virtual environment and evaluate the controller with a post-simulation analysis platform.
Introduction to HIL Testing
•HIL simulation is an integrated part of the control design cycle. This dynamic testing system will deliver products to market faster and accelerates time-to-market by reducing design cycle times.
•It operates the real component in a virtual test scenario.
A typical HIL system receives data from the control system through sensors, sends the plant simulation data to the controller via actuators, processes data using the controller, features a human machine interface (HMI), and analyzes the control unit with the use of a post-simulation analysis platform.
•HIL simulation is a process that is used to test control units by simulating the equipment in a virtual environment and evaluating the controller with a post-simulation analysis platform.
•HIL simulation acts as an effective platform for developing and testing real-time control units. The controller can be subjected to different complexities of the plant and faults using the HIL system.
•The plant characteristics and the faults are mathematical representation of all related dynamic systems, given as inputs to the controller and tested in a virtual environment.
•The accuracy and performance of a HIL system depends in the completeness of the plant model, similar to simulation.
•The HIL approach is ideal for the design and test of complex equipment used in automobiles, airplanes, satellites, missiles, rockets, and locomotives.
•Apart from automotive and A&D, HIL testing has widened its testing application in power systems and power electronics.
•Manufacturers also prefer HIL to traditional testing because the testing cost of the control units using HIL simulation is more cost-effective.
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