EPE Association: EPE 2015 - LS6d: Measurement and Control

EPE 2015 - LS6d: Measurement and Control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 03: Measurement and Control > EPE 2015 - LS6d: Measurement and Control

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   An Improved Control Technique of a Very Precise Positioning System used in Hail Suppression Systems
By Marian-Stefan NICOLAE [View]
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Abstract: A novel control strategy suitable for positioning systems used in hail suppression is presented. The solution is designed for realizing a very precise control of the final launch pad position over the azimuth and elevation, resulting in controlling a system with two degrees of freedom. The proposed simulation is developed starting from a PMSM with an inversed magnetic model. The control algorithm initially takes into consideration a regulation of the main motor's electrical quantities: torque, speed and position. Then a mechanical model of the system is developed, accounting for the experimentally determined static torque, total reduction factor (worm gear and launch pad), total inertia and efficiency. The simulation developed in Matlab Simulink is presented, and it considers two different systems formed by one of the motors, it's worm gear and the corresponding mechanical parts. Two sets of simulation results have been developed. The experimental tests were carried out with two different types of motors, measuring the speed and position of the launch pad and controlling them in a closed loop, showing the feasibility of the proposed solution. Experimental results are provided for the elevation motor.

   Local Weak Observability Conditions of Sensorless AC Drives
By Mohamad KOTEICH [View]
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Abstract: Alternating current (AC) electrical drive control without mechanical sensors is an active research topic.This paper studies the observability of both induction machine and synchronous machine sensorlessdrives. Observer-based sensorless techniques are known for their deteriorated performance in someoperating conditions. An observability analysis of the machines helps understanding (and improving)the observer's behavior in the aforementioned conditions.

   Model-based Approach for Sensor Fault-tolerant Drive Systems
By Fabian OELKERS [View]
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Abstract: The paper presents an approach to reliably detect and treat sensor faults in drive systems. For detectingerrors in current and rotor position sensors, model-based methods (sensorless position estimation, cur-rent observers) are used. Sensor faults in the drive system may cause erroneous or oscillating torques. Invehicles with wheel hub drives on the rear axle and without additional driving safety systems, such faultscould even result in driving conditions that are difficult to control. The error detection system is verifiedby measurements on a test bench. Vehicle tests on a test track prove the effectiveness of the proceduresfor in-vehicle use.

   Optimal Trajectory Control of a CLCC Resonant Power Converter
By Henk HUISMAN [View]
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Abstract: A CLCC resonant converter to be used in an isolated power supply is operated using optimal trajectory control (OTC). As a consequence, the converter's inner loop behavior is changed to that of a controlled current source. The controller is implemented in an FPGA. Simulation results and recorded transient waveforms show both the intended and actual converter operation.

EPE 2015 - LS6d: Measurement and Control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 03: Measurement and Control > EPE 2015 - LS6d: Measurement and Control
	[return to parent folder]

	An Improved Control Technique of a Very Precise Positioning System used in Hail Suppression Systems By Marian-Stefan NICOLAE	[View] [Download]
Abstract: A novel control strategy suitable for positioning systems used in hail suppression is presented. The solution is designed for realizing a very precise control of the final launch pad position over the azimuth and elevation, resulting in controlling a system with two degrees of freedom. The proposed simulation is developed starting from a PMSM with an inversed magnetic model. The control algorithm initially takes into consideration a regulation of the main motor's electrical quantities: torque, speed and position. Then a mechanical model of the system is developed, accounting for the experimentally determined static torque, total reduction factor (worm gear and launch pad), total inertia and efficiency. The simulation developed in Matlab Simulink is presented, and it considers two different systems formed by one of the motors, it's worm gear and the corresponding mechanical parts. Two sets of simulation results have been developed. The experimental tests were carried out with two different types of motors, measuring the speed and position of the launch pad and controlling them in a closed loop, showing the feasibility of the proposed solution. Experimental results are provided for the elevation motor.

	Local Weak Observability Conditions of Sensorless AC Drives By Mohamad KOTEICH	[View] [Download]
Abstract: Alternating current (AC) electrical drive control without mechanical sensors is an active research topic.This paper studies the observability of both induction machine and synchronous machine sensorlessdrives. Observer-based sensorless techniques are known for their deteriorated performance in someoperating conditions. An observability analysis of the machines helps understanding (and improving)the observer's behavior in the aforementioned conditions.

	Model-based Approach for Sensor Fault-tolerant Drive Systems By Fabian OELKERS	[View] [Download]
Abstract: The paper presents an approach to reliably detect and treat sensor faults in drive systems. For detectingerrors in current and rotor position sensors, model-based methods (sensorless position estimation, cur-rent observers) are used. Sensor faults in the drive system may cause erroneous or oscillating torques. Invehicles with wheel hub drives on the rear axle and without additional driving safety systems, such faultscould even result in driving conditions that are difficult to control. The error detection system is verifiedby measurements on a test bench. Vehicle tests on a test track prove the effectiveness of the proceduresfor in-vehicle use.

	Optimal Trajectory Control of a CLCC Resonant Power Converter By Henk HUISMAN	[View] [Download]
Abstract: A CLCC resonant converter to be used in an isolated power supply is operated using optimal trajectory control (OTC). As a consequence, the converter's inner loop behavior is changed to that of a controlled current source. The controller is implemented in an FPGA. Simulation results and recorded transient waveforms show both the intended and actual converter operation.