نتایج جستجو برای: nichols method
تعداد نتایج: 1631287 فیلتر نتایج به سال:
Since the PID tuning formula of Ziegler-Nichols step test, perhaps the best known, the process control literature is still showing lots of PID control schemes to improve the closed-loop stability. In this paper, using the relationship between the PID and generalized minimum variance (GMV) controller and adjusting online the control weighting factor by an adaptive learning algorithm of first-ord...
T uningrules for PI and PID controllers for stable non oscillating plants are presented. These rules are based on an optimization procedure, where both low frequency performance, mid frequency stability margins and high frequency control activit y are taken into account. The required plant kno wledgeis either a speci c frequency point, like in Ziegler-Nichols frequency design method, or a step ...
Pneumatic Artificial Muscle (PAM) overcome the other common actuators as it has higher power-to-weight ratio. However, the air compressibility and lack of damping ability of PAM brings dynamic delay to the pressure response and causes oscillatory motion to occur. It is not easy to realize the motion with high accuracy and high speed due to all the non-linear characteristics of pneumatic system....
It is known that the vector space spanned by labeled rooted trees forms a Hopf algebra. Let k be a field and let R be a commutative kalgebra. Let H denote the Hopf algebra of rooted trees labeled using derivations in Der(R). In this paper, we introduce a construction that gives R a H-module algebra structure and show this induces a differential algebra structure of H acting on R. The work here ...
In this paper, I-PD controller is designed and controller parameters are optimized using particle swarm intelligence for a First Order Lag Integrating plus Time Delayed model (FOLIPD). One of the modifications of PID controller is I-PD controller, which can be used for eliminating the proportional and derivative kick occurs during set point change. The controller parameters play the major role ...
Line Current Commutated (LCC) HVDC systems consists of uncertain plants. These uncertainties are result of changes/disturbances in the ac networks or in the LCC HVDC system itself. Further uncertainties can be introduced due to simplified system modelling techniques. Quantitative Feedback Theory is a frequency-domain technique that utilises the Nichols chart to achieve a robust design over a sp...
18 JFQ / Winter 2000–01 In theory, jointness is the means through which the National Command Authorities achieve unity of effort from diverse service competencies. Yet for many members of the military, the idea of jointness presents a Pandora’s box of unattractive possibilities. Parochialism, not cooperation, remains the watchword despite the common deference to jointness. Although Congress has...
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