Hydraulic Tubes

Linear Relationships Between Limited Pressure Difference and Coil Current of On/Off Valves

Abstract: On/off solenoid valves with PWM control are widely used in all types of vehicle electro-hydraulic control systems respecting to their desirable properties of reliable, low cost and fast acting. However, it can hardly achieve a linear hydraulic modulation by using on/off valves mainly due to the nonlinear behaviors of valve dynamics and fluid, which affects […]

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Career Direction

Career Advice for Someone Beginning an Engineering Education

I have had a typical 37-year engineering career that I have thoroughly enjoyed, split between project engineering, production, production management, and consulting. I was recently asked for some general advice, from a nephew beginning an engineering education. Here is my reply: Engineering is a wonderful career if you have a technical mindset. Consider your engineering […]

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wind turbine generator

Real Time Simulation of Nonlinear Generalized Predictive Control for Wind Energy Conversion System

Abstract: In order to make a wind power generation truly cost-effective and reliable, an advanced control techniques must be used. In this paper, we develop a new control strategy, using nonlinear generalized predictive control (NGPC) approach, for double fed induction generator-based wind turbine. The proposed control law is based on two points: NGPC-based torque-current control […]

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Security Breach

Urgent Need for Automation Systems Cyberprotection

Widespread global awareness of threats to information systems (IS) has led government and business to focus significant attention and resources on IS cybersecurity. The same cannot be said regarding industrial automation systems, where there is an urgent need to focus on the cyberprotection of critical industrial control systems. The U.S. Department of Homeland Security has […]

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Hybrid Temperature Controllers Offer More Versatility

Many process plant units have temperature loops that must be monitored and controlled. If these units are self-contained to some degree, as with a process skid or a remote unit, they often have just a few discrete and analog I/O points that must be monitored and controlled in addition to temperature. These units also often […]

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Industrial engineers in factory

Optimized Sensor Selection for Control and Fault Tolerance of Electromagnetic Suspension Systems

Abstract:This paper presents a systematic design framework for selecting the sensors in an optimized manner, simultaneously satisfying a set of given complex system control requirements, i.e. optimum and robust performance as well as fault tolerant control for high integrity systems. It is worth noting that optimum sensor selection in control system design is often a […]

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Webinar Recording: Why Do You Have to Calibrate Smart Instrumentation?

    This post has been updated with the webinar recording. Process measurements are critical with respect to product quality and safety. Verifying/calibrating all instruments properly in a timely manner is an important aspect of ensuring that your product is manufactured correctly. I have seen instruments drift because of their natural tendencies and drift that […]

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How NIST Cybersecurity Framework Improves Critical Infrastructure Protection

On 12 February 2013 President Obama issued Executive Order 13636, titled “Improving Critical Infrastructure Cybersecurity.” The executive order instructed the National Institute of Standards and Technology (NIST) to develop a voluntary cybersecurity framework that would provide a “prioritized, flexible, repeatable, performance-based, and cost-effective approach for assisting organizations responsible for critical infrastructure services to manage cybersecurity […]

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White quadrocopter carrying carton box

Modeling and Control Approach to a Distinctive Quadrotor Helicopter

Abstract: The referenced quadrotor helicopter in this paper has a unique configuration. It is more complex than commonly used quadrotors because of its inaccurate parameters, unideal symmetrical structure and unknown nonlinear dynamics. A novel method was presented to handle its modeling and control problems in this paper, which adopts a MIMO RBF neural nets-based state-dependent ARX […]

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