Real-time capable control strategy for hydraulic systems while systematically taking into consideration control (rate) and state variable constraints

US11048281B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Steffen Joos · Murr, DE
• Matthias Bitzer · Stuttgart, DE
• Knut Graichen · Ulm, DE
• Michael Hilsch · Pöttmes, DE
• Adrian Trachte · Stuttgart, DE
• Steffen Mutschler · Neu-Ulm, DE

Key dates

• Filing date: Jun 5, 2019
• Grant date: Jun 29, 2021
• Expiry date: Sep 25, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/7656
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method for generating a control variable trajectory for an actuator so as to influence an input variable of a system, wherein a set point is supplied to the output variable of the system of a trajectory planning procedure, which from the set point generates a trajectory of constrained input values for a filter integrator chain and a trajectory of flat desired states, wherein the trajectory of constrained input values and the trajectory of flat desired states are supplied to a flatness-based feedforward control procedure that generates therefrom the control variable trajectory for the actuator, wherein in the trajectory planning procedure so as to generate the trajectory of constrained input values at least one constraint is applied in dependence upon the trajectory of flat desired states.