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Karbasizadeh, Nima (author), Ahmadi Dastjerdi, A. (author), Saikumar, N. (author), Hassan HosseinNia, S. (author)This article addresses nonlinearity in reset elements and its effects. Reset elements are known for having less phase lag based on describing function (DF) analysis compared to their linear counterparts; however, they are nonlinear elements and produce higher-order harmonics. This article investigates the steady-state higher-order harmonics for...journal article 2023
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Kaczmarek, M.B. (author), Hassan HosseinNia, S. (author)In this paper, a fractional-order extension of a negative position feedback (NPF) controller for active damping is proposed. The design of the controller is motivated by the frequency-domain loop shaping analysis, and the controller dynamics are defined to maintain the high-pass characteristics of an integer-order NPF. The proposed controller...journal article 2023
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Ahmadi Dastjerdi, A. (author), Astolfi, Alessandro (author), Saikumar, N. (author), Karbasizadeh, Nima (author), Valerio, Duarte (author), Hassan HosseinNia, S. (author)This article introduces a closed-loop frequency analysis tool for reset control systems. To begin with sufficient conditions for the existence of the steady-state response for a closed-loop system with a reset element and driven by periodic references are provided. It is then shown that, under specific conditions, such a steady-state response...journal article 2023
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Ahmadi Dastjerdi, A. (author), Astolfi, Alessandro (author), Hassan HosseinNia, S. (author)Reset controllers have the potential to enhance the performance of high-precision industrial motion systems. However, similar to other non-linear controllers, the stability analysis for these controllers is complex and often requires parametric model of the system, which may hinder their applicability. In this paper a frequency-domain...journal article 2023
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Buitenhuis, R. N. (author), Saikumar, N. (author), Hassan HosseinNia, S. (author)The ever-increasing industry desire for improved performance makes linear controller design run into fundamental limitations. Nonlinear control methods such as Reset Control (RC) are needed to overcome these. RC is a promising candidate since, unlike other nonlinear methods, it easily integrates into the industry-preferred PID design...journal article 2023
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Saikumar, N. (author), Heinen, Kars (author), Hassan HosseinNia, S. (author)The authors regret for the typographical error in Eq. (13) and provide the corrected version below: The authors would like to apologize for any inconvenience caused.journal article 2023
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Ronaes, E.P. (author), Hunt, A. (author), Hassan HosseinNia, S. (author)The recent development of a hybrid tunable magnet actuator proposes to eliminate Joule heating when maintaining a force or position offset. By controlling the remnant magnetic flux in an AlNiCo magnet within the actuator, the actuation force can be linearly varied and maintained. While a method for tuning the magnetisation state of the magnet...journal article 2023
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Zhang, X. (author), Hassan HosseinNia, S. (author)Reset control systems have possessed the potential to meet the demands of machines, such as faster response times, improved disturbance rejection and enhanced tracking performance. However, prior research on the analysis and design of reset controllers has been restricted to the assumption of two resets per period, neglecting multiple-reset...conference paper 2023
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Buskes, V. F. (author), Kaczmarek, M.B. (author), Veenstra, J. C. (author), Coulais, C. (author), Hassan HosseinNia, S. (author)Metamaterials are artificial structures with properties that are rare or non-existent in nature. These properties are created by the geometry and interconnection of the metamaterial unit cells. In active metamaterials, sensors and actuators are embedded in each unit cell to achieve greater design freedom and tunability of properties after the...conference paper 2023
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Karbasizadeh, Nima (author), Hassan HosseinNia, S. (author)This paper addresses the main goal of using reset control in precision motion control systems, breaking of the well-known “Waterbed effect”. A new architecture for reset elements will be introduced which has a continuous output signal as opposed to conventional reset elements. A steady-state precision study is presented, showing the steady...journal article 2022
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Zhang, X. (author), Kaczmarek, M.B. (author), Hassan HosseinNia, S. (author)In this paper, we introduce a new representation for open-loop reset systems. We show that at steady-state a reset integrator can be modelled as a parallel interconnection of the base-linear system and piece-wise constant nonlinearity. For sinusoidal input signals, this nonlinearity takes a form of a square wave. Subsequently, we show how the...conference paper 2022
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Shahbazzadeh, Majid (author), Sadati, Seyed Jalil (author), Hassan HosseinNia, S. (author)This article proposes a systematic approach for optimal reset law design of a class of nonlinear systems. By using the guaranteed cost control method, sufficient conditions for the design of optimal reset law are derived in terms of linear matrix inequalities. In an offline design procedure, the reset law is computed that minimizes the upper...journal article 2022
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Mahmoudabadi, Parvin (author), Tavakoli-Kakhki, Mahsan (author), Hassan HosseinNia, S. (author)Accurate representation of the atomic force microscopy (AFM) system is not only necessary to achieve control objectives, but it is also beneficial for detecting the nanomechanical properties of the samples. To this end, this paper addresses the issue of controller design for the AFM system based on an accurate nonaffine nonlinear distributed...journal article 2022
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Hooijschuur, R.H.T. (author), Saikumar, N. (author), Hassan HosseinNia, S. (author), van Ostayen, R.A.J. (author)This paper presents the development of a contactless sensing system and the dynamic evaluation of an air-bearing based precision wafer positioning system. The contactless positioning stage is a response to the trend seen in the high-tech industry, where the substrates are becoming thinner and larger to reduce the cost and increase the yield....journal article 2022
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Hosseini, S. Ali (author), Tavazoei, Mohammad Saleh (author), Van Eijk, Luke F. (author), Hassan HosseinNia, S. (author)The Hybrid Integrator-Gain System (HIGS) has recently gained a lot of attention in control of precision motion systems. HIGS is a nonlinear low pass filter/integrator with a 52° phase advantage over its linear counterpart. This property allows us to avoid the limitations typically associated with linear controllers, like the waterbed effect...conference paper 2022
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Karbasizadeh, Nima (author), Hassan HosseinNia, S. (author)According to the well-known loop-shaping control design approach, the steady-state precision of control systems can be improved by stacking integrators. However, due to the waterbed effect in linear control systems, such an action will worsen the transient response by increasing overshoot and creating wind-up problems. This paper presents a new...conference paper 2022
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Karbasizadeh, Nima (author), Hassan HosseinNia, S. (author)According to the well-known loop shaping method for the design of controllers, the performance of the controllers in terms of step response, steady-state disturbance rejection and noise attenuation and robustness can be improved by increasing the gain at lower frequencies and decreasing it at higher frequencies and increasing the phase margin as...conference paper 2022
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Mohan, M.A. (author), Kaczmarek, M.B. (author), Hassan HosseinNia, S. (author)Active vibration control (AVC) is crucial for the structural integrity, precision, and speed of industrial machines. Despite advancements in nonlinear control techniques, most AVC techniques predominantly employ linear feedback control due to their simplicity and ability to be designed in the frequency domain. In this paper, we introduce a reset...conference paper 2022
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Nasiri, Ali (author), Bayat, Farhad (author), Mobayen, Saleh (author), Hassan HosseinNia, S. (author)An accurate understanding of the output power functionality in gas turbines concerning the fuel, inlet valve status and other parameters can provide a general overview of the turbine's performance. In this study, the problem of practical power regulation in gas turbines is investigated in the simultaneous presence of actuator constraints,...journal article 2021
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Tepljakov, Aleksei (author), Alagoz, Baris Baykant (author), Yeroglu, Celaleddin (author), Gonzalez, Emmanuel A. (author), Hassan HosseinNia, S. (author), Petlenkov, Eduard (author), Ates, Abdullah (author), Cech, Martin (author)The interest in fractional-order (FO) control can be traced back to the late nineteenth century. The growing tendency towards using fractional-order proportional-integral-derivative (FOPID) control has been fueled mainly by the fact that these controllers have additional 'tuning knobs' that allow coherent adjustment of the dynamics of control...journal article 2021