The advantages and feasibility of motor control using very fast (MHz) switching in place of traditional amplifiers are investigated and integrated motion-control architecture based on discrete-event control approach to be implemented in digital logic is proposed. A switching controller combines the current and motion feedback paths into a single loop. A model-based observer estimates the load torque. The control algorithm designed by proposed approach can be easily implemented on FPGA platforms.
COBISS.SI-ID: 13440534
This paper presents a new method of high improvement of frequency pullability and linearity using reactance in series with AT fundamental crystal operated with a series load capacitance in the range 3 pF to 50 pF and frequencies in the range 3.5 MHz to 21 MHz. The experimental results show that the new approach using compensation method of quartz crystal connected in series reactance increases the frequency pulling range by ×25 to ×100 depending on the type of oscillator and compensation factor ˝k˝ in the temperature range 10°C to 40°C.
COBISS.SI-ID: 13526806
Hardware development made data-driven methods and algorithms popular. Based on process history data a good nonlinear model can be obtained for various control and fault detection tasks, despite the effect of close-loop control. The paper deals with development of nonlinear principal component analysis method realized by auto-associative artificial neural network structure, with parameters designed by Taguchi design of experiments approach. Improved nonlinear model and method more efficiently detects faults and possible process deviations.
COBISS.SI-ID: 13441302
New FPGA technology could now realize at best the digital control key-point: flexible performance and time to market. The paper presents new embedded switching control properties of FPGA-based techniques. Simple implementation makes concept of switching control very attractive in power electronic systems, like control of DC-DC converters. Simulations and experimental results show the feasibility of the proposed method, opening interesting possibilities in motion and power electronics converter control.
COBISS.SI-ID: 13375766
One degree of freedom actuation of the Powerball is discussed. When attached to the manipulator, the Powerboll rotor represents a nonholonomic dynamic load. The Powerball housing acts as a griper in which the load’s rotor spins up. The arrangements can be seen also as an underactuated mechanism in which dynamic coupling is considered for control.
COBISS.SI-ID: 13468182