Event-triggered control for LPV modeling of DC-DC boost converter

This study presents the event-triggered control (ETC) for linear parameter varying (LPV) model of boost converters. We examine the nonlinear dynamics of boost converters in the LPV framework. The proposed controller is duty-ratio-dependent and provides better performance while requiring less computation. Using the parameter-dependent Lyapunov function (PDLF), we demonstrate the stablity analysis of the proposed approach. Furthermore, we demonstrate that the inter-event time is lower bound by a positive constant, which indicates Zeno behavior free performance. In comparison to earlier time-invariant synthesis techniques, the LPV formulation offers for increased robustness and performance properties. Simulation and experimental results validate the effectiveness of the proposed method

FEATURE RECOGNITION AND STRENGTH ESTIMATION OF CHAIN LINKS USING 3D INSPECTION DATA FOR MOORING INTEGRITY ASSESSMENT

Ph.DDOCTOR OF PHILOSOPHY (FOE

Discrete‐time sector based hands‐off control for nonlinear system

International audienceThis article presents a hands‐off control design for discrete‐time nonlinear system with a special type of nonlinear sector termed as “discrete‐time urn:x-wiley:rnc:media:rnc4888:rnc4888-math-0004 sector.” The design method to define the boundary of a discrete‐time urn:x-wiley:rnc:media:rnc4888:rnc4888-math-0005 sector is done with control‐Lyapunov function. The generalization of nonlinear system is viewed in the perspective of a comparison function. By means of a proposed sector, a switching control is designed such that no control action is experienced inside the sector thus, saving unnecessary control efforts. However, to study the robustness for discrete‐time system, a hands‐off control is modified to ensure the monotonic decrease in the energy of the system. Finally, the proposed approach is verified with the simulation results

Effect of Fertility Levels and Bio-fertilizers Application on Yield, Yield Attributes, and Economics of Chickpea (Cicer arietinum L.)

The experiment was conducted during Rabi season of 2017–18 at the Students' Instructional Farm of Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, Uttar Pradesh to evaluate the effect of different fertility levels and bio-fertilizers application on yield, yield attributes, and quality of late sown chickpea (Cicer arietinum L.). The experiment comprised of 12 treatment combinations in split plot design which comprised 4 treatments [F1 (control), F2 (RDF 100%), F3 (75% RDF), F4 (50% RDF)] in main plot and 3 treatments [B1 (Rhizobium + PSB), B2 (Rhizobium + PGPR) and B3 (Rhizobium + PSB + PGPR)] in sub plots with three replications. Results showed that among the different fertility levels, application of 100% RDF significantly enhanced yield and yield attributes over other treatment. Among the different bio-fertilizers treatments application of Rhizobium + PSB + PGPR had significantly improved yield attributes and seed yield as compared to Rhizobium + PGPR. The combined application of 100% RDF with Rhizobium + PSB + PGPR resulted in significantly higher seed yield of late sown chickpea during winter (Rabi). Higher values of economics viz., gross return, net return and B:C ratio in chickpea were observed with the application of 100% RDF + (Rhizobium + PSB + PGPR) treatments except cost of cultivation

Quantized‐feedback hands‐off control for nonlinear systems

Abstract This paper addresses a quantized feedback hands‐off control for a class of nonlinear systems. Here, [K,KL] sector is constructed with the suitable choice of control‐Lyapunov function. With adjustment policy of quantization parameters, the quantized feedback hands‐off control can force the states of the nonlinear feedback system to the interior of a continuous‐time [K,KL] sector infinite time and the Lyapunov‐candidate function decreases automatically inside the designed sector. Finally, the effectiveness of the proposed method is illustrated by numerical examples

Delayed output feedback based leader–follower and leaderless consensus control of uncertain multiagent systems

Abstract This paper proposes a distributed artificially delayed output feedback‐based leader–follower and leaderless consensus control for the uncertain general linear multiagent systems (MASs) with an arbitrary relative degree. Based on the measured relative output and their delayed information with respect to neighbours, two distributed controllers are designed, which relaxes the requirement of all relative states information of agents. Through the Lyapunov–Krasovskii functional, linear matrix inequalities (LMIs) are formulated, and these LMIs are feasible for arbitrary small delays selected by the user. Delay‐dependent sufficient conditions are provided to guarantee the asymptotic convergence of nominal error systems and ultimately uniform boundedness in the case of a perturbed error system, using the input to state stability (ISS) theory. Finally, the efficacy of the proposed method is illustrated through numerical examples

Interaction Effect of Phosphorous and Zinc on Yield Attributes, Yield and Quality Characteristics of Chickpea under the Central Plain Zone of Uttar Pradesh

The present field experiments were conducted on studies effect of phosphorus and zinc on yield and quality parameters of chickpeas taken up at Student's Instructional Farm, at Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, (U.P.) India, during the rabi season 2021-22. The experiment consists of 16 treatment combinations in a factorial randomized block design with three replications consisting of a different combination of phosphorus and zinc. Chickpea variety RVG-203 was grown with the recommended agronomic practices. On the basis of results emanating from the investigation, it can be concluded that among the yield components and productivity parameters maximum values in relation to the number of pods plant-1 (61.26), number of grains pod-1 (1.73), 100 grain wt. (20.20 gm), grain yield (18.85 q ha-1), straw yield (23.35 q ha-1), biological yield (42.20 q ha-1), harvest index (44.67 %) and protein content in grain (20.93%) were found in the treatment T15 [P90Zn6]. Corresponding minimum values in relation to number of pods plant-1 (45.00), number of grains pod-1 (1.20), 100 grain wt. (16.96 gm), grain yield (12.25 q ha-1), straw yield (17.16 q ha-1), biological yield (29.41 q ha-1), harvest index (41.65%) and protein content in grain (19.56%) were associated with the treatment T1 [P0Zn0]

Effect of Phosphorus, Zinc and Rhizobium on Productivity and Profitability of Chickpea (Cicer arietinum L.) under Central Plain Zone of Uttar Pardesh

Field experiments were conducted to study the Effect of phosphorus, zinc and rhizobium on yield and profibility of chickpea (Cicer arietinum L.) during rabi season of 2020-21 and 2021-22 at students instructional farm, Chandra Shekhar Azad University of Agriculture & Technology, Kanpur. The treament consists of three levels of phosphorus (0, 30 and 60 kg ha-1), three levels of zinc (0,2.5, 5.0 kg ha-1) and two levels of rhizobium inoculation (with and without rhizobium) totally eighteen treatment combinations. The experiment was laid out in Factorial randomized block design with three replications. N @ 20 kg ha-1 and K @ 20 kg ha-1 applied uniformly through urea and murate of potash respectively The experiment was laid out in Factorial randomized block design with three replications. Chickpea variety RVG-202 was grown with the recommended agronomic practices. Results of the experiment reflected that yield of chickpea crop increased with the use of phosphorus, zinc and rhizobium inoculation. Maximum grain yield 20.89 kg ha-1, stover yield 25.26 kg ha-1, biological yield 46.15 kg ha-1 and harvest index 45.27% were recorded under T18 (60 kg P+5 kg Zn ha-1 rhizobium innoculation) over control during second year. But, significantly increased T17 (60 kg P+2.5 kg Zn ha-1+ rhizobium innoculation) during both years (2020-21 and 2021-22). The maximum cost of cultivation (₹ 36615.23), gross return (₹ 115380), net return (₹ 78764.77) and B:C ratio (2.15) were recorded under T18 (60 kg P+5 kg Zn ha-1 rhizobium innoculation). The present study showed that combined application of phosphorus and zinc with rhizobium inoculation along with recommended nitrogen and potassium could be an effective option for enhancing chickpea yield component, yield and economic return

Responses of Phosphorus and Zinc on Growth and Yield in Chickpea (Cicer arietinum L.)

The investigation was taken up at Student's Instructional Farm, Nawabganj at Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, (U.P.) India, during Rabi 2020-21. The 2 factors in sixteen treatment combinations viz., P0Zn0 (control), P0Zn2.5, P0Zn5, P0Zn10, P30Zn0, P30Zn2.5, P30Zn5, P30Zn10, P60Zn0. P60Zn2.5, P60Zn5, P60Zn10, P90Zn0, P90Zn2.5, P90Zn5 and P90Zn10 were experimented in randomized block design with 3 replications. All the growth and yield parameters increased significantly with increasing levels of phosphorus up to 90 kg ha-1. However, growth and yield parameters of chickpea were increased up to 5 kg Zn ha-1 and further increase in the level of Zn does not show significant influence on growth and yield of chickpea. Interaction effect of P and Zn levels on the grain and straw yield of chickpea was significant during study. Thus, it may be concluded that application of phosphorus and zinc proved more beneficial in improving the productivity of chickpea crop. The result showed that application of P and Zn also improved the growth and yield. Phosphorus requirement of chickpea was found more