Control algorithm for pitch of controllable pitch propeller and rotating speed of host machine in stable navigation state of ship
A technology of control algorithm and rotational speed, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problem that fuel efficiency and maneuverability are difficult to have at the same time, and achieve the effect of good maneuverability and high fuel efficiency of ships
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0017] The thrust P obtained by the ship through the propeller is a key indicator to measure the maneuverability of the ship. The acceleration obtained by the ship is directly related to the thrust P, which can be expressed as formula (12):
[0018] m*a=P-R (12) In the formula, m is the total weight of the ship, a is the acceleration, and R is the total resistance of the ship. When the P value is larger, the acceleration of the ship is greater and the maneuverability is better. The thrust P can be expressed as formula (1):
[0019] P=K P ρn 2 D. P 4 (1) In the formula, ρ is the density of water, K P is the thrust coefficient, n is the rotational speed, D P is the paddle diameter, which can be expressed as formula (2):
[0020] K P =a 1 lambda p 2 +a 2 lambda p +a 3 (2) In the formula, a 1 、a 2 、a 3 is the curve fitting parameter of propeller dripping water test results, λ p can ...
Embodiment 2
[0037] Implementation method of optimal control algorithm with load protection:
[0038] Divide the rotational speed n into 500 equal parts and the pitch H into 100 equal parts, then establish a two-dimensional array of criterion J[500][100], power W[500][100] and condition B[500][100] (condition B[500][100] is a two-dimensional array value, used to judge TRUE or FALSE), according to (1)-(10) formula statistics J[i][j], W[i under the conditions of each pitch and speed ][j] value, and W under the speed condition 外 value, when W[i][j] and W 外 When relation (8) is satisfied, the value of B[i][j] is TRUE, otherwise it is FALSE. The patented algorithm is to obtain the maximum value of J[i][j] under the condition that B[i][j] is TRUE through the query sorting algorithm, and the n and H values at this time are the control target values.
[0039] The present invention is further explained by a set of specific numerical values. The water density in the formula ρ = 1, the propelle...
Embodiment 3
[0041] Such as figure 1 As shown, taking one of the controllable pitch propeller control systems of the optimal starting algorithm of the present invention as an example, the working process of the present invention is described in detail.
[0042] The control system uses the high-speed and reliable CAN bus as the transmission carrier of digital information, and uses the high-performance ARM7 chip as the main control chip. It is designed and developed with information processing, optimal matching control, system status monitoring, host overload protection, information storage, etc. Functional modular controllable pitch propeller embedded control system. The high-performance embedded control host takes the high-performance ARM7 CPU chip as the core, uses the multi-channel isolated CAN bus as the communication means, and is equipped with large-capacity program memory, data memory and large-capacity solid-state data recording chip.
[0043] The operating frequency of the high-pe...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com